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Article ; Online: Physicians of the future will use online content at the point-of-care to guide their decisions. The future is now!

Kulkarni, Rick G

MedGenMed : Medscape general medicine

2007 Volume 9, Issue 1, Page(s) 4

MeSH term(s)	Attitude of Health Personnel ; Diagnosis ; Forecasting ; Humans ; Internet/trends ; Physicians/trends ; Point-of-Care Systems/trends
Language	English
Publishing date	2007
Publishing country	United States
Document type	Editorial
ISSN	1531-0132
ISSN (online)	1531-0132
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Article ; Online: Going lean in the emergency department: a strategy for addressing emergency department overcrowding.

Kulkarni, Rick G

MedGenMed : Medscape general medicine

2007 Volume 9, Issue 4, Page(s) 58

MeSH term(s)	Crowding ; Emergency Service, Hospital/organization & administration ; Health Planning/organization & administration ; Humans ; Organizational Innovation ; Patient Care ; Patient Transfer/organization & administration ; Quality of Health Care ; Risk Factors ; United States
Language	English
Publishing date	2007-12-14
Publishing country	United States
Document type	Editorial
ZDB-ID	2041637-4
ISSN	1531-0132 ; 1531-0132
ISSN (online)	1531-0132
ISSN	1531-0132
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: Minutes-duration optical flares with supernova luminosities.

Ho, Anna Y Q / Perley, Daniel A / Chen, Ping / Schulze, Steve / Dhillon, Vik / Kumar, Harsh / Suresh, Aswin / Swain, Vishwajeet / Bremer, Michael / Smartt, Stephen J / Anderson, Joseph P / Anupama, G C / Awiphan, Supachai / Barway, Sudhanshu / Bellm, Eric C / Ben-Ami, Sagi / Bhalerao, Varun / de Boer, Thomas / Brink, Thomas G /

Burruss, Rick / Chandra, Poonam / Chen, Ting-Wan / Chen, Wen-Ping / Cooke, Jeff / Coughlin, Michael W / Das, Kaustav K / Drake, Andrew J / Filippenko, Alexei V / Freeburn, James / Fremling, Christoffer / Fulton, Michael D / Gal-Yam, Avishay / Galbany, Lluís / Gao, Hua / Graham, Matthew J / Gromadzki, Mariusz / Gutiérrez, Claudia P / Hinds, K-Ryan / Inserra, Cosimo / A J, Nayana / Karambelkar, Viraj / Kasliwal, Mansi M / Kulkarni, Shri / Müller-Bravo, Tomás E / Magnier, Eugene A / Mahabal, Ashish A / Moore, Thomas / Ngeow, Chow-Choong / Nicholl, Matt / Ofek, Eran O / Omand, Conor M B / Onori, Francesca / Pan, Yen-Chen / Pessi, Priscila J / Petitpas, Glen / Polishook, David / Poshyachinda, Saran / Pursiainen, Miika / Riddle, Reed / Rodriguez, Antonio C / Rusholme, Ben / Segre, Enrico / Sharma, Yashvi / Smith, Ken W / Sollerman, Jesper / Srivastav, Shubham / Strotjohann, Nora Linn / Suhr, Mark / Svinkin, Dmitry / Wang, Yanan / Wiseman, Philip / Wold, Avery / Yang, Sheng / Yang, Yi / Yao, Yuhan / Young, David R / Zheng, WeiKang

Nature

2023 Volume 623, Issue 7989, Page(s) 927–931

Abstract: In recent years, certain luminous extragalactic optical transients have been observed to last only a few ... ...

Abstract	In recent years, certain luminous extragalactic optical transients have been observed to last only a few days
Language	English
Publishing date	2023-11-15
Publishing country	England
Document type	Journal Article
ZDB-ID	120714-3
ISSN	1476-4687 ; 0028-0836
ISSN (online)	1476-4687
ISSN	0028-0836
DOI	10.1038/s41586-023-06673-6
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Zs.A 26: Show issues			Location: Je nach Verfügbarkeit (siehe Angabe bei Bestand) bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular Jg. 1995 - 2021: Lesesall (1.OG) ab Jg. 2022: Lesesaal (EG)
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Article ; Online: Consequences of Chirality in Directing the Pathway of Cholesteric Helix Inversion of π-Conjugated Polymers by Light.

Kulkarni, Chidambar / Curvers, Rick H N / Vantomme, Ghislaine / Broer, Dirk J / Palmans, Anja R A / Meskers, Stefan C J / Meijer, E W

Advanced materials (Deerfield Beach, Fla.)

2020 Volume 33, Issue 2, Page(s) e2005720

Abstract: Control over main-chain motion of chiral π-conjugated polymers can lead to unexpected new functionalities. Here, it is shown that by combining photoswitchable azobenzene units in conjugation with chiral fluorene comonomers and appropriate plasticizers, ... ...

Abstract	Control over main-chain motion of chiral π-conjugated polymers can lead to unexpected new functionalities. Here, it is shown that by combining photoswitchable azobenzene units in conjugation with chiral fluorene comonomers and appropriate plasticizers, the polymer organization and chiroptical properties of these alternating copolymers steered by light and its state of polarization can be dynamically controlled. The configuration of the stereogenic centers in the side chains of the fluorene units determines the handedness of the cholesteric organization in thermally annealed films, indicating cooperative behavior. The polymer alignment and helicity of the supramolecular arrangement can be switched by irradiating with linearly and circularly polarized light, respectively. Intriguingly, when switching the handedness of thermally induced cholesteric organizations by illuminating with circularly polarized light that is opposite to the handedness of the cholesteric phases, a nematic-like intermediate state is observed during helix interconversion. By the sequence of irradiation with left and right circularly polarized light followed by thermal annealing, an asymmetric motion, reminiscent of that seen in molecular motors is observed. These findings suggest that functional conjugated polymers can exhibit emergent properties at mesoscopic scale.
Language	English
Publishing date	2020-12-03
Publishing country	Germany
Document type	Journal Article
ZDB-ID	1474949-X
ISSN	1521-4095 ; 0935-9648
ISSN (online)	1521-4095
ISSN	0935-9648
DOI	10.1002/adma.202005720
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Article: The failed intubation attempt in the emergency department: analysis of prevalence, rescue techniques, and personnel.

Bair, Aaron E / Filbin, Michael R / Kulkarni, Rick G / Walls, Ron M

The Journal of emergency medicine

2002 Volume 23, Issue 2, Page(s) 131–140

Abstract: The aims of this study were: To describe the prevalence of Emergency Department (ED) airway management failures requiring rescue maneuvers, to describe successful rescue methods used when the primary method chosen is unsuccessful, and to characterize the ...

Abstract	The aims of this study were: To describe the prevalence of Emergency Department (ED) airway management failures requiring rescue maneuvers, to describe successful rescue methods used when the primary method chosen is unsuccessful, and to characterize the roles of emergency physicians and other specialists in rescue airway management. A prospective observational study was conducted of ED airway management in 30 hospitals in the USA, Canada, and Singapore participating in the National Emergency Airway Registry (NEAR) database project. Patients were entered in the study if they underwent ED airway management, the first method chosen was not successful in achieving intubation, and a rescue technique was required. Data were collected on a structured data form for entry into a relational database with subsequent search for subjects fulfilling inclusion and exclusion criteria. Descriptive statistics were used for analysis of these data. There were 7,712 patients identified who underwent emergency intubation during the study period from January 1998 to February 2001. A total of 207 (2.7%) patient intubations met the inclusion criteria. Of these, 102 (49%) patients underwent rescue rapid sequence intubation (RSI). RSI was used after failure of oral intubation with sedation alone (n = 29), oral intubation without medications (n = 37), or blind nasotracheal intubation (n = 36). Forty-three (21%) patients underwent rescue cricothyrotomy after failure of RSI (n = 26) or other intubation methods (n = 17). Seventy-nine percent of rescue RSIs and 53% of rescue surgical airways were performed by emergency physicians. In conclusion, a total of 2.7% of emergency intubations required rescue. RSI is the most commonly used first line technique for ED airway management and is also the principal back-up technique when other oral or nasal intubation methods fail. Emergency physicians manage the majority of ED intubations, including those requiring rescue techniques.
MeSH term(s)	Cricoid Cartilage/surgery ; Emergency Service, Hospital ; Humans ; Intubation, Intratracheal/statistics & numerical data ; Treatment Failure
Language	English
Publishing date	2002-02-28
Publishing country	United States
Document type	Journal Article ; Multicenter Study
ZDB-ID	605559-x
ISSN	0736-4679
ISSN	0736-4679
DOI	10.1016/s0736-4679(02)00501-2
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Article ; Online: HoLEPs: A Comparative Study of Men With Massive Prostate Volumes ≥150 mL and <150 mL.

Tay, Li June / Kulkarni, Meghana / Oluwole-Ojo, Akinlolu / Spurling, Leigh James / El-Hage, Oussama / DiBenedetto, Ella / Hadjipavlou, Marios / Popert, Rick / Challacombe, Ben

Urology

2022 Volume 164, Page(s) 197–203

Abstract: ... enucleated weight was 124 g vs 60 g. One patient (1%) from the ≥150 cc cohort required a surgical procedure ...

Abstract	Objective: To assess outcomes following Holmium Laser Enucleation of Prostate (HoLEP) in men with prostate volumes ≥150cc and compare this to men with prostate volumes ≤150 cc. Patients & methods: We analyzed our prospective database of consecutive patients undergoing HoLEP in a single tertiary public hospital between October 2016 and January 2019. We excluded patients with clinically significant prostate cancer or neurogenic bladders. Preoperative prostate volume was measured on MRI or ultrasonography. Perioperative variables and functional outcomes were recorded. Results: Of 304 HoLEPs performed, we included 97 patients with prostate volume of ≥150 cc and 186 patients with prostate volume <150 cc. Comparing both cohorts (≥150 cc vs <150 cc): mean age was 71.5 vs 68.3 years, prostate volume 195 cc vs 93 cc, preoperative Qmax 9.6mL/s vs 10mL/s, American Urology Association Symptom Score (IPSS) 21 points vs 20.5 points; mean PSA 13.2µg/L vs 8.8µg/L; laser duration 86 vs 59 minutes; morcellation duration 29 vs 14 minutes; enucleated weight was 124 g vs 60 g. One patient (1%) from the ≥150 cc cohort required a surgical procedure for stress urinary incontinence, and none from the <150 cc cohort, but this did not achieve statistical significance (P = .12). There were no statistically significant differences in postoperative Qmax (32.3 vs 26.4 mL/s; P = .12), IPSS (5.9 points vs 7.3points; P = .23), mean PSA (3.9 µg/L vs 2.2 µg/L; P = .60), stricture incidence (1% vs 2.7%; P = .63), or significant stress urinary incontinence (4.1% vs 0.5%; P = .08). Conclusion: Our large series demonstrates that HoLEP is safe and effective in patients with massive prostates (≥150 cc), with similar outcomes compared to patients with prostates <150 cc.
MeSH term(s)	Aged ; Holmium ; Humans ; Laser Therapy/methods ; Lasers, Solid-State/therapeutic use ; Male ; Prostate/diagnostic imaging ; Prostate/surgery ; Prostate-Specific Antigen ; Prostatic Hyperplasia/complications ; Prostatic Hyperplasia/surgery ; Transurethral Resection of Prostate/methods ; Treatment Outcome ; Urinary Incontinence, Stress/surgery
Chemical Substances	Prostate-Specific Antigen (EC 3.4.21.77) ; Holmium (W1XX32SQN1)
Language	English
Publishing date	2022-02-19
Publishing country	United States
Document type	Comparative Study ; Journal Article
ZDB-ID	192062-5
ISSN	1527-9995 ; 0090-4295
ISSN (online)	1527-9995
ISSN	0090-4295
DOI	10.1016/j.urology.2021.12.038
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Zs.A 1142: Show issues			Location: Je nach Verfügbarkeit (siehe Angabe bei Bestand) bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular Jg. 1995 - 2021: Lesesall (1.OG) ab Jg. 2022: Lesesaal (EG)
Zs.MO 275: Show issues

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Article ; Online: Safety of "hot" and "cold" site admissions within a high-volume urology department in the United Kingdom at the peak of the COVID-19 pandemic.

Stroman, Luke / Russell, Beth / Kotecha, Pinky / Kantartzi, Anastasia / Ribeiro, Luis / Jackson, Bethany / Ismaylov, Vugar / Debo-Aina, Adeoye Oluwakanyinsola / MacAskill, Findlay / Kum, Francesca / Kulkarni, Meghana / Sandher, Raveen / Walsh, Anna / Doerge, Ella / Guest, Katherine / Kailash, Yamini / Simson, Nick / McDonald, Cassandra / Mensah, Elsie /

June Tay, Li / Chalokia, Ramandeep / Clovis, Sharon / Eversden, Elizabeth / Cossins, Jane / Rusere, Jonah / Zisengwe, Grace / Fleure, Louisa / Cooper, Leslie / Chatterton, Kathryn / Barber, Amelia / Roberts, Catherine / Azavedo, Thomasia / Ritualo, Jeffrey / Omana, Harold / Mills, Liza / Studd, Lily / El Hage, Oussama / Nair, Rajesh / Malde, Sachin / Sahai, Arun / Fernando, Archana / Taylor, Claire / Challacombe, Benjamin / Thurairaja, Ramesh / Popert, Rick / Olsburgh, Jonathon / Cathcart, Paul / Brown, Christian / Hadjipavlou, Marios / Di Benedetto, Ella / Bultitude, Matthew / Glass, Jonathon / Yap, Tet / Zakri, Rhana / Shabbir, Majed / Willis, Susan / Thomas, Kay / O'Brien, Tim / Khan, Muhammad Shamim / Dasgupta, Prokar

BJUI compass

2021 Volume 2, Issue 2, Page(s) 97–104

Abstract: Objectives: To determine the safety of urological admissions and procedures during the height of the COVID-19 pandemic using "hot" and "cold" sites. The secondary objective is to determine risk factors of contracting COVID-19 within our cohort.: ... ...

Abstract	Objectives: To determine the safety of urological admissions and procedures during the height of the COVID-19 pandemic using "hot" and "cold" sites. The secondary objective is to determine risk factors of contracting COVID-19 within our cohort. Patients and methods: A retrospective cohort study of all consecutive patients admitted from March 1 to May 31, 2020 at a high-volume tertiary urology department in London, United Kingdom. Elective surgery was carried out at a "cold" site requiring a negative COVID-19 swab 72-hours prior to admission and patients were required to self-isolate for 14-days preoperatively, while all acute admissions were admitted to the "hot" site.Complications related to COVID-19 were presented as percentages. Risk factors for developing COVID-19 infection were determined using multivariate logistic regression analysis. Results: A total of 611 patients, 451 (73.8%) male and 160 (26.2%) female, with a median age of 57 (interquartile range 44-70) were admitted under the urology team; 101 (16.5%) on the "cold" site and 510 (83.5%) on the "hot" site. Procedures were performed in 495 patients of which eight (1.6%) contracted COVID-19 postoperatively with one (0.2%) postoperative mortality due to COVID-19. Overall, COVID-19 was detected in 20 (3.3%) patients with two (0.3%) deaths. Length of stay was associated with contracting COVID-19 in our cohort (OR 1.25, 95% CI 1.13-1.39). Conclusions: Continuation of urological procedures using "hot" and "cold" sites throughout the COVID-19 pandemic was safe practice, although the risk of COVID-19 remained and is underlined by a postoperative mortality.
Language	English
Publishing date	2021-01-21
Publishing country	United States
Document type	Journal Article
ISSN	2688-4526
ISSN (online)	2688-4526
DOI	10.1002/bco2.56
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Article ; Online: Safety of hot and cold site admissions within a high volume urology department in the United Kingdom at the peak of the COVID-19 pandemic

Stroman, Luke / Russell, Beth / Kotecha, Pinky / Kantarzi, Anastasia / Ribeiro, Luis / Jackson, Bethany / Ismaylov, Vugar / Debo-Aina, Adeoye Oluwakanyinsola / MacAskill, Findlay / Kum, Francesca / Kulkarni, Meghana / Sandher, Raveen / Walsh, Anna / Doerge, Ella / Guest, Katherine / Kailash, Yamini / Simson, Nick / McDonald, Cassandra R / Mensah, Elsie /

Tay, Li June / Chalokia, Ramandeep / Clovis, Sharon / Eversden, Elizabeth / Cossins, Jane / Rusere, Jonah / Zisengwe, Grace / Fleure, Louisa / Cooper, Leslie / Chatterton, Kathryn / Barber, Amelia / Roberts, Catherine / Azavedo, Thomasia / Ritualo, Jeffrey / Omana, Harold / Mills, Liza / Studd, Lily / El Hage, Oussama / Nair, Rajesh / Malde, Sachin / Sahai, Arun / Fernando, Archana / Taylor, Claire / Challacombe, Ben / Thurairaja, Ramesh / Popert, Rick / Olsburgh, Jonathon / Cathcart, Paul / Brown, Christian / Hadjipavlou, Marios / Di Benedetto, Ella / Bultitude, Matthew / Glass, Jonathon / Yap, Tet / Zakri, Rhana / Shabbir, Majed / Willis, Susan / Thomas, Kay / O'Brien, Tim / Khan, Muhammad Shamim / Dasgupta, Prokar

medRxiv

Abstract: Importance: Contracting COVID-19 peri-operatively has been associated with a mortality rate as high as 23%. Using hot and cold sites has led to a low rate of post-operative diagnosis of COVID-19 infection and allowed safe continuation of important ... ...

Abstract	Importance: Contracting COVID-19 peri-operatively has been associated with a mortality rate as high as 23%. Using hot and cold sites has led to a low rate of post-operative diagnosis of COVID-19 infection and allowed safe continuation of important emergency and cancer operations in our centre. Objective: The primary objective was to determine the safety of the continuation of surgical admissions and procedures during the height of the COVID-19 pandemic using hot and cold surgical sites. The secondary objective is to determine risk factors of contracting COVID-19 to help guide further prevention. Setting: A single surgical department at a tertiary care referral centre in London, United Kingdom. Participants: All consecutive patients admitted under the care of the urology team over a 3-month period from 1st March to 31st May 2020 over both hot acute admission sites and cold elective sites were included. Exposures: COVID-19 was prevalent in the community over the three months of the study at the height of the pandemic. The majority of elective surgery was carried out in a cold site requiring patients to have a negative COVID-19 swab 72 hours prior to admission and to self-isolate for 14 days pre-operatively, whilst all acute admissions were admitted to the hot site. Main outcomes and measures: COVID-19 was detected in 1.6% of post-operative patients. There was 1 (0.2%) post-operative mortality due to COVID-19. Results: A total of 611 patients, 451 (73.8%) male and 160 (26.2%) female, with a median age of 57 (interquartile range 44-70) were admitted under the surgical team. Of these, 101 (16.5%) were admitted on the cold site and 510 (83.5%) on the hot site. Surgical procedures were performed in 495 patients of which 8 (1.6%) contracted COVID-19 post-operatively with 1 (0.2%) post-operative mortality due to COVID-19. Overall, COVID-19 was detected in 20 (3.3%) patients with 2 (0.3%) deaths. On multivariate analysis, length of stay was associated with contracting COVID-19 in our cohort (OR 1.25, 95% CI 1.13-1.39). Conclusions and Relevance: Continuation of surgical procedures using hot and cold sites throughout the COVID-19 pandemic was safe practice, although the risk of COVID-19 remained and is underlined by a post-operative mortality. Reducing length of stay may be able to reduce contraction of COVID-19.
Keywords	covid19
Language	English
Publishing date	2020-08-06
Publisher	Cold Spring Harbor Laboratory Press
Document type	Article ; Online
DOI	10.1101/2020.08.04.20154203
Database	COVID19

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Article ; Online: Safety of hot and cold site admissions within a high volume urology department in the United Kingdom at the peak of the COVID-19 pandemic

Tay, Li June / Chalokia, Ramandeep / Clovis, Sharon / Eversden, Elizabeth / Cossins, Jane / Rusere, Jonah / Zisengwe, Grace / Fleure, Louisa / Cooper, Leslie / Chatterton, Kathryn / Barber, Amelia / Roberts, Catherine / Azavedo, Thomasia / Ritualo, Jeffrey / Omana, Harold / Mills, Liza / Studd, Lily / Hage, Oussama El / Nair, Rajesh / Malde, Sachin / Sahai, Arun / Fernando, Archana / Taylor, Claire / Challacombe, Ben / Thurairaja, Ramesh / Popert, Rick / Olsburgh, Jonathon / Cathcart, Paul / Brown, Christian / Hadjipavlou, Marios / Benedetto, Ella Di / Bultitude, Matthew / Glass, Jonathon / Yap, Tet / Zakri, Rhana / Shabbir, Majed / Willis, Susan / Thomas, Kay / O039, Tim / Brien, / Khan, Muhammad Shamim / Dasgupta, Prokar

Abstract	Importance: Contracting COVID-19 peri-operatively has been associated with a mortality rate as high as 23%. Using hot and cold sites has led to a low rate of post-operative diagnosis of COVID-19 infection and allowed safe continuation of important emergency and cancer operations in our centre. Objective: The primary objective was to determine the safety of the continuation of surgical admissions and procedures during the height of the COVID-19 pandemic using hot and cold surgical sites. The secondary objective is to determine risk factors of contracting COVID-19 to help guide further prevention. Setting: A single surgical department at a tertiary care referral centre in London, United Kingdom. Participants: All consecutive patients admitted under the care of the urology team over a 3-month period from 1st March to 31st May 2020 over both hot acute admission sites and cold elective sites were included. Exposures: COVID-19 was prevalent in the community over the three months of the study at the height of the pandemic. The majority of elective surgery was carried out in a cold site requiring patients to have a negative COVID-19 swab 72 hours prior to admission and to self-isolate for 14 days pre-operatively, whilst all acute admissions were admitted to the hot site. Main outcomes and measures: COVID-19 was detected in 1.6% of post-operative patients. There was 1 (0.2%) post-operative mortality due to COVID-19. Results: A total of 611 patients, 451 (73.8%) male and 160 (26.2%) female, with a median age of 57 (interquartile range 44-70) were admitted under the surgical team. Of these, 101 (16.5%) were admitted on the cold site and 510 (83.5%) on the hot site. Surgical procedures were performed in 495 patients of which 8 (1.6%) contracted COVID-19 post-operatively with 1 (0.2%) post-operative mortality due to COVID-19. Overall, COVID-19 was detected in 20 (3.3%) patients with 2 (0.3%) deaths. On multivariate analysis, length of stay was associated with contracting COVID-19 in our cohort (OR 1.25, 95% CI 1.13-1.39). Conclusions and Relevance: Continuation of surgical procedures using hot and cold sites throughout the COVID-19 pandemic was safe practice, although the risk of COVID-19 remained and is underlined by a post-operative mortality. Reducing length of stay may be able to reduce contraction of COVID-19.
Keywords	covid19
Publisher	MedRxiv; WHO
Document type	Article ; Online
Note	WHO #Covidence: #20154203
DOI	10.1101/2020.08.04.20154203
Database	COVID19

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Book ; Online: Time-series and Phasecurve Photometry of Episodically-Active Asteroid (6478) Gault in a Quiescent State Using APO, GROWTH, P200 and ZTF

Purdum, Josiah N. / Lin, Zhong-Yi / Bolin, Bryce T. / Sharma, Kritti / Choi, Philip I. / Bhalerao, Varun / Kumar, Harsh / Quimby, Robert / Van Roestel, Joannes C. / Zhai, Chengxing / Fernandez, Yanga R. / Hanuš, Josef / Lisse, Carey M. / Bodewits, Dennis / Fremling, Christoffer / Golovich, Nathan Ryan / Hsu, Chen-Yen / Ip, Wing-Huen / Ngeow, Chow-Choong /

Saini, Navtej S. / Shao, Michael / Yao, Yuhan / Ahumada, Tomás / Anand, Shreya / Andreoni, Igor / Burdge, Kevin B. / Burruss, Rick / Chang, Chan-Kao / Copperwheat, Chris M. / Coughlin, Michael / De, Kishalay / Dekany, Richard / Delacroix, Alexandre / Drake, Andrew / Duev, Dmitry / Graham, Matthew / Hale, David / Kool, Erik C. / Kasliwal, Mansi M. / Kostadinova, Iva S. / Kulkarni, Shrinivas R. / Laher, Russ R. / Mahabal, Ashish / Masci, Frank J. / Mróz, Przemyslaw J. / Neill, James D. / Riddle, Reed / Rodriguez, Hector / Smith, Roger M. / Walters, Richard / Yan, Lin / Zolkower, Jeffry

2021

Abstract: ... _r = 14.63 +/- 0.02, G_r = 0.21 +/- 0.02 from our secular phasecurve observations. In addition ...

Abstract	We observed Episodically Active Asteroid (6478) Gault in 2020 with multiple telescopes in Asia and North America and have found that it is no longer active after its recent outbursts at the end of 2018 and start of 2019. The inactivity during this apparation allowed us to measure the absolute magnitude of Gault of H_r = 14.63 +/- 0.02, G_r = 0.21 +/- 0.02 from our secular phasecurve observations. In addition, we were able to constrain Gault's rotation period using time-series photometric lightcurves taken over 17 hours on multiple days in 2020 August, September and October. The photometric lightcurves have a repeating $\lesssim$0.05 magnitude feature suggesting that (6478) Gault has a rotation period of ~2.5 hours and may have a semi-spherical or top-like shape, much like Near-Earth Asteroids Ryugu and Bennu. The rotation period of ~2.5 hours is near to the expected critical rotation period for an asteroid with the physical properties of (6478) Gault suggesting that its activity observed over multiple epochs is due to surface mass shedding from its fast rotation spun up by the Yarkovsky-O'Keefe-Radzievskii-Paddack effect. Comment: 23 pages, 18 figures; Accepted by ApJ Letters
Keywords	Astrophysics - Earth and Planetary Astrophysics
Subject code	551
Publishing date	2021-02-25
Publishing country	us
Document type	Book ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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