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Book: The star of Bethlehem

Kidger, Mark

an astronomer's view

1999

Author's details	Mark Kidger
Language	English
Size	XI, 306 S, Ill
Publisher	Princeton Univ. Press
Publishing place	Princeton, NJ u.a.
Document type	Book
Note	Bibliogr. S. 295 - 300
ISBN	0691058237 ; 9780691058238
Database	Former special subject collection: coastal and deep sea fishing

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Book ; Online: Herschel measurements of the D/H and 16O/18O ratios in water in the Oort-cloud comet C/2009 P1 (Garradd)

2012

Abstract: The D/H ratio in cometary water is believed to be an important indicator of the conditions under which icy planetesimals formed and can provide clues to the contribution of comets to the delivery of water and other volatiles to Earth. Available ... ...

Abstract	The D/H ratio in cometary water is believed to be an important indicator of the conditions under which icy planetesimals formed and can provide clues to the contribution of comets to the delivery of water and other volatiles to Earth. Available measurements suggest that there is isotopic diversity in the comet population. The Herschel Space Observatory revealed an ocean-like ratio in the Jupiter-family comet 103P/Hartley 2, whereas most values measured in Oort-cloud comets are twice as high as the ocean D/H ratio. We present here a new measurement of the D/H ratio in the water of an Oort-cloud comet. HDO, H_2O, and H_2^18O lines were observed with high signal-to-noise ratio in comet C/2009 P1 (Garradd) using the Herschel HIFI instrument. Spectral maps of two water lines were obtained to constrain the water excitation. The D/H ratio derived from the measured H_2^16O and HDO production rates is 2.06+/-0.22 X 10-4. This result shows that the D/H in the water of Oort-cloud comets is not as high as previously thought, at least for a fraction of the population, hence the paradigm of a single, archetypal D/H ratio for all Oort-cloud comets is no longer tenable. Nevertheless, the value measured in C/2009 P1 (Garradd) is significantly higher than the Earth's ocean value of 1.558 X 10-4. The measured H_2^16O/H_2^18O ratio of 523+/-32 is, however, consistent with the terrestrial value. Comment: 6 pages with 4 figures and 1 table. Accepted for publication as a Letter in Astronomy & Astrophysics
Keywords	Astrophysics - Earth and Planetary Astrophysics
Subject code	551
Publishing date	2012-07-31
Publishing country	us
Document type	Book ; Online
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Article ; Online: A massive binary black-hole system in OJ 287 and a test of general relativity.

Valtonen, M J / Lehto, H J / Nilsson, K / Heidt, J / Takalo, L O / Sillanpää, A / Villforth, C / Kidger, M / Poyner, G / Pursimo, T / Zola, S / Wu, J-H / Zhou, X / Sadakane, K / Drozdz, M / Koziel, D / Marchev, D / Ogloza, W / Porowski, C /

Siwak, M / Stachowski, G / Winiarski, M / Hentunen, V-P / Nissinen, M / Liakos, A / Dogru, S

Nature

2008 Volume 452, Issue 7189, Page(s) 851–853

Abstract: Tests of Einstein's general theory of relativity have mostly been carried out in weak gravitational fields where the space-time curvature effects are first-order deviations from Newton's theory. Binary pulsars provide a means of probing the strong ... ...

Abstract	Tests of Einstein's general theory of relativity have mostly been carried out in weak gravitational fields where the space-time curvature effects are first-order deviations from Newton's theory. Binary pulsars provide a means of probing the strong gravitational field around a neutron star, but strong-field effects may be best tested in systems containing black holes. Here we report such a test in a close binary system of two candidate black holes in the quasar OJ 287. This quasar shows quasi-periodic optical outbursts at 12-year intervals, with two outburst peaks per interval. The latest outburst occurred in September 2007, within a day of the time predicted by the binary black-hole model and general relativity. The observations confirm the binary nature of the system and also provide evidence for the loss of orbital energy in agreement (within 10 per cent) with the emission of gravitational waves from the system. In the absence of gravitational wave emission the outburst would have happened 20 days later.
Language	English
Publishing date	2008-04-17
Publishing country	England
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	120714-3
ISSN	1476-4687 ; 0028-0836
ISSN (online)	1476-4687
ISSN	0028-0836
DOI	10.1038/nature06896
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Article: The Comet Interceptor Mission.

Jones, Geraint H / Snodgrass, Colin / Tubiana, Cecilia / Küppers, Michael / Kawakita, Hideyo / Lara, Luisa M / Agarwal, Jessica / André, Nicolas / Attree, Nicholas / Auster, Uli / Bagnulo, Stefano / Bannister, Michele / Beth, Arnaud / Bowles, Neil / Coates, Andrew / Colangeli, Luigi / Corral van Damme, Carlos / Da Deppo, Vania / De Keyser, Johan /

Della Corte, Vincenzo / Edberg, Niklas / El-Maarry, Mohamed Ramy / Faggi, Sara / Fulle, Marco / Funase, Ryu / Galand, Marina / Goetz, Charlotte / Groussin, Olivier / Guilbert-Lepoutre, Aurélie / Henri, Pierre / Kasahara, Satoshi / Kereszturi, Akos / Kidger, Mark / Knight, Matthew / Kokotanekova, Rosita / Kolmasova, Ivana / Kossacki, Konrad / Kührt, Ekkehard / Kwon, Yuna / La Forgia, Fiorangela / Levasseur-Regourd, Anny-Chantal / Lippi, Manuela / Longobardo, Andrea / Marschall, Raphael / Morawski, Marek / Muñoz, Olga / Näsilä, Antti / Nilsson, Hans / Opitom, Cyrielle / Pajusalu, Mihkel / Pommerol, Antoine / Prech, Lubomir / Rando, Nicola / Ratti, Francesco / Rothkaehl, Hanna / Rotundi, Alessandra / Rubin, Martin / Sakatani, Naoya / Sánchez, Joan Pau / Simon Wedlund, Cyril / Stankov, Anamarija / Thomas, Nicolas / Toth, Imre / Villanueva, Geronimo / Vincent, Jean-Baptiste / Volwerk, Martin / Wurz, Peter / Wielders, Arno / Yoshioka, Kazuo / Aleksiejuk, Konrad / Alvarez, Fernando / Amoros, Carine / Aslam, Shahid / Atamaniuk, Barbara / Baran, Jędrzej / Barciński, Tomasz / Beck, Thomas / Behnke, Thomas / Berglund, Martin / Bertini, Ivano / Bieda, Marcin / Binczyk, Piotr / Busch, Martin-Diego / Cacovean, Andrei / Capria, Maria Teresa / Carr, Chris / Castro Marín, José María / Ceriotti, Matteo / Chioetto, Paolo / Chuchra-Konrad, Agata / Cocola, Lorenzo / Colin, Fabrice / Crews, Chiaki / Cripps, Victoria / Cupido, Emanuele / Dassatti, Alberto / Davidsson, Björn J R / De Roche, Thierry / Deca, Jan / Del Togno, Simone / Dhooghe, Frederik / Donaldson Hanna, Kerri / Eriksson, Anders / Fedorov, Andrey / Fernández-Valenzuela, Estela / Ferretti, Stefano / Floriot, Johan / Frassetto, Fabio / Fredriksson, Jesper / Garnier, Philippe / Gaweł, Dorota / Génot, Vincent / Gerber, Thomas / Glassmeier, Karl-Heinz / Granvik, Mikael / Grison, Benjamin / Gunell, Herbert / Hachemi, Tedjani / Hagen, Christian / Hajra, Rajkumar / Harada, Yuki / Hasiba, Johann / Haslebacher, Nico / Herranz De La Revilla, Miguel Luis / Hestroffer, Daniel / Hewagama, Tilak / Holt, Carrie / Hviid, Stubbe / Iakubivskyi, Iaroslav / Inno, Laura / Irwin, Patrick / Ivanovski, Stavro / Jansky, Jiri / Jernej, Irmgard / Jeszenszky, Harald / Jimenéz, Jaime / Jorda, Laurent / Kama, Mihkel / Kameda, Shingo / Kelley, Michael S P / Klepacki, Kamil / Kohout, Tomáš / Kojima, Hirotsugu / Kowalski, Tomasz / Kuwabara, Masaki / Ladno, Michal / Laky, Gunter / Lammer, Helmut / Lan, Radek / Lavraud, Benoit / Lazzarin, Monica / Le Duff, Olivier / Lee, Qiu-Mei / Lesniak, Cezary / Lewis, Zoe / Lin, Zhong-Yi / Lister, Tim / Lowry, Stephen / Magnes, Werner / Markkanen, Johannes / Martinez Navajas, Ignacio / Martins, Zita / Matsuoka, Ayako / Matyjasiak, Barbara / Mazelle, Christian / Mazzotta Epifani, Elena / Meier, Mirko / Michaelis, Harald / Micheli, Marco / Migliorini, Alessandra / Millet, Aude-Lyse / Moreno, Fernando / Mottola, Stefano / Moutounaick, Bruno / Muinonen, Karri / Müller, Daniel R / Murakami, Go / Murata, Naofumi / Myszka, Kamil / Nakajima, Shintaro / Nemeth, Zoltan / Nikolajev, Artiom / Nordera, Simone / Ohlsson, Dan / Olesk, Aire / Ottacher, Harald / Ozaki, Naoya / Oziol, Christophe / Patel, Manish / Savio Paul, Aditya / Penttilä, Antti / Pernechele, Claudio / Peterson, Joakim / Petraglio, Enrico / Piccirillo, Alice Maria / Plaschke, Ferdinand / Polak, Szymon / Postberg, Frank / Proosa, Herman / Protopapa, Silvia / Puccio, Walter / Ranvier, Sylvain / Raymond, Sean / Richter, Ingo / Rieder, Martin / Rigamonti, Roberto / Ruiz Rodriguez, Irene / Santolik, Ondrej / Sasaki, Takahiro / Schrödter, Rolf / Shirley, Katherine / Slavinskis, Andris / Sodor, Balint / Soucek, Jan / Stephenson, Peter / Stöckli, Linus / Szewczyk, Paweł / Troznai, Gabor / Uhlir, Ludek / Usami, Naoto / Valavanoglou, Aris / Vaverka, Jakub / Wang, Wei / Wang, Xiao-Dong / Wattieaux, Gaëtan / Wieser, Martin / Wolf, Sebastian / Yano, Hajime / Yoshikawa, Ichiro / Zakharov, Vladimir / Zawistowski, Tomasz / Zuppella, Paola / Rinaldi, Giovanna / Ji, Hantao

Space science reviews

2024 Volume 220, Issue 1, Page(s) 9

Abstract: Here we describe the novel, multi-point Comet Interceptor mission. It is dedicated to the exploration of a little-processed long-period comet, possibly entering the inner Solar System for the first time, or to encounter an interstellar object originating ...

Abstract	Here we describe the novel, multi-point Comet Interceptor mission. It is dedicated to the exploration of a little-processed long-period comet, possibly entering the inner Solar System for the first time, or to encounter an interstellar object originating at another star. The objectives of the mission are to address the following questions: What are the surface composition, shape, morphology, and structure of the target object? What is the composition of the gas and dust in the coma, its connection to the nucleus, and the nature of its interaction with the solar wind? The mission was proposed to the European Space Agency in 2018, and formally adopted by the agency in June 2022, for launch in 2029 together with the Ariel mission. Comet Interceptor will take advantage of the opportunity presented by ESA's F-Class call for fast, flexible, low-cost missions to which it was proposed. The call required a launch to a halo orbit around the Sun-Earth L2 point. The mission can take advantage of this placement to wait for the discovery of a suitable comet reachable with its minimum
Language	English
Publishing date	2024-01-24
Publishing country	Netherlands
Document type	Journal Article ; Review
ZDB-ID	2017804-9
ISSN	1572-9672 ; 0038-6308
ISSN (online)	1572-9672
ISSN	0038-6308
DOI	10.1007/s11214-023-01035-0
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Article: The design of double Gauss systems using digital computers.

Kidger, M J / Wynne, C G

Applied optics

1967 Volume 6, Issue 3, Page(s) 553–563

Abstract: A general study of the design of lenses of double Gauss type and derivatives of these has been carried out, with the lenses optimized at an aperture of f/2 and a field angle of +/-20 degrees . The results indicate that the number of optimized designs is ... ...

Abstract	A general study of the design of lenses of double Gauss type and derivatives of these has been carried out, with the lenses optimized at an aperture of f/2 and a field angle of +/-20 degrees . The results indicate that the number of optimized designs is small for all of the constructions that were investigated. Numerical examplesfor several designs are given.
Language	English
Publishing date	1967-03-01
Publishing country	United States
Document type	Journal Article
ISSN	1559-128X
ISSN	1559-128X
DOI	10.1364/AO.6.000553
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Book ; Online: First results of Herschel/PACS observations of Neptune

Lellouch, E. / Hartogh, P. / Feuchtgruber, H. / Vandenbussche, B. / de Graauw, T. / Moreno, R. / Jarchow, C. / Cavalié, T. / Orton, G. / Banaszkiewicz, M. / Blecka, M. I. / Bockelée-Morvan, D. / Crovisier, J. / Encrenaz, T. / Fulton, T. / Küppers, M. / Lara, L. M. / Lis, D. C. / Medvedev, A. S. /

Rengel, M. / Sagawa, H. / Swinyard, B. / Szutowicz, S. / Bensch, F. / Bergin, E. / Billebaud, F. / Biver, N. / Blake, G. A. / Blommaert, J. A. D. L. / Cernicharo, J. / Courtin, R. / Davis, G. R. / Decin, L. / Encrenaz, P. / Gonzalez, A. / Jehin, E. / Kidger, M. / Naylor, D. / Portyankina, G. / Schieder, R. / Sidher, S. / Thomas, N. / de Val-Borro, M. / Verdugo, E. / Waelkens, C. / Walker, H. / Aarts, H. / Comito, C. / Kawamura, J. H. / Maestrini, A. / Peacocke, T. / Teipen, R. / Tils, T. / Wildeman, K.

2010

Abstract: We report on the initial analysis of a Herschel/PACS full range spectrum of Neptune, covering the 51-220 micrometer range with a mean resolving power of ~ 3000, and complemented by a dedicated observation of CH4 at 120 micrometers. Numerous spectral ... ...

Abstract	We report on the initial analysis of a Herschel/PACS full range spectrum of Neptune, covering the 51-220 micrometer range with a mean resolving power of ~ 3000, and complemented by a dedicated observation of CH4 at 120 micrometers. Numerous spectral features due to HD (R(0) and R(1)), H2O, CH4, and CO are present, but so far no new species have been found. Our results indicate that (i) Neptune's mean thermal profile is warmer by ~ 3 K than inferred from the Voyager radio-occultation; (ii) the D/H mixing ratio is (4.5+/-1) X 10-5, confirming the enrichment of Neptune in deuterium over the protosolar value (~ 2.1 X 10-5); (iii) the CH4 mixing ratio in the mid stratosphere is (1.5+/-0.2) X 10-3, and CH4 appears to decrease in the lower stratosphere at a rate consistent with local saturation, in agreement with the scenario of CH4 stratospheric injection from Neptune's warm south polar region; (iv) the H2O stratospheric column is (2.1+/-0.5) X 1014 cm-2 but its vertical distribution is still to be determined, so the H2O external flux remains uncertain by over an order of magnitude; and (v) the CO stratospheric abundance is about twice the tropospheric value, confirming the dual origin of CO suspected from ground-based millimeter/submillimeter observations. Comment: Accepted for publication in Astronomy & Astrophysics (special issue on Herschel first results)
Keywords	Astrophysics - Earth and Planetary Astrophysics
Subject code	551
Publishing date	2010-06-01
Publishing country	us
Document type	Book ; Online
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Article ; Online: Deep Impact: observations from a worldwide Earth-based campaign.

Meech, K J / Ageorges, N / A'Hearn, M F / Arpigny, C / Ates, A / Aycock, J / Bagnulo, S / Bailey, J / Barber, R / Barrera, L / Barrena, R / Bauer, J M / Belton, M J S / Bensch, F / Bhattacharya, B / Biver, N / Blake, G / Bockelée-Morvan, D / Boehnhardt, H /

Bonev, B P / Bonev, T / Buie, M W / Burton, M G / Butner, H M / Cabanac, R / Campbell, R / Campins, H / Capria, M T / Carroll, T / Chaffee, F / Charnley, S B / Cleis, R / Coates, A / Cochran, A / Colom, P / Conrad, A / Coulson, I M / Crovisier, J / deBuizer, J / Dekany, R / de Léon, J / Dello Russo, N / Delsanti, A / DiSanti, M / Drummond, J / Dundon, L / Etzel, P B / Farnham, T L / Feldman, P / Fernández, Y R / Filipovic, M D / Fisher, S / Fitzsimmons, A / Fong, D / Fugate, R / Fujiwara, H / Fujiyoshi, T / Furusho, R / Fuse, T / Gibb, E / Groussin, O / Gulkis, S / Gurwell, M / Hadamcik, E / Hainaut, O / Harker, D / Harrington, D / Harwit, M / Hasegawa, S / Hergenrother, C W / Hirst, P / Hodapp, K / Honda, M / Howell, E S / Hutsemékers, D / Iono, D / Ip, W-H / Jackson, W / Jehin, E / Jiang, Z J / Jones, G H / Jones, P A / Kadono, T / Kamath, U W / Käufl, H U / Kasuga, T / Kawakita, H / Kelley, M S / Kerber, F / Kidger, M / Kinoshita, D / Knight, M / Lara, L / Larson, S M / Lederer, S / Lee, C-F / Levasseur-Regourd, A C / Li, J Y / Li, Q-S / Licandro, J / Lin, Z-Y / Lisse, C M / LoCurto, G / Lovell, A J / Lowry, S C / Lyke, J / Lynch, D / Ma, J / Magee-Sauer, K / Maheswar, G / Manfroid, J / Marco, O / Martin, P / Melnick, G / Miller, S / Miyata, T / Moriarty-Schieven, G H / Moskovitz, N / Mueller, B E A / Mumma, M J / Muneer, S / Neufeld, D A / Ootsubo, T / Osip, D / Pandea, S K / Pantin, E / Paterno-Mahler, R / Patten, B / Penprase, B E / Peck, A / Petitas, G / Pinilla-Alonso, N / Pittichova, J / Pompei, E / Prabhu, T P / Qi, C / Rao, R / Rauer, H / Reitsema, H / Rodgers, S D / Rodriguez, P / Ruane, R / Ruch, G / Rujopakarn, W / Sahu, D K / Sako, S / Sakon, I / Samarasinha, N / Sarkissian, J M / Saviane, I / Schirmer, M / Schultz, P / Schulz, R / Seitzer, P / Sekiguchi, T / Selman, F / Serra-Ricart, M / Sharp, R / Snell, R L / Snodgrass, C / Stallard, T / Stecklein, G / Sterken, C / Stüwe, J A / Sugita, S / Sumner, M / Suntzeff, N / Swaters, R / Takakuwa, S / Takato, N / Thomas-Osip, J / Thompson, E / Tokunaga, A T / Tozzi, G P / Tran, H / Troy, M / Trujillo, C / Van Cleve, J / Vasundhara, R / Vazquez, R / Vilas, F / Villanueva, G / von Braun, K / Vora, P / Wainscoat, R J / Walsh, K / Watanabe, J / Weaver, H A / Weaver, W / Weiler, M / Weissman, P R / Welsh, W F / Wilner, D / Wolk, S / Womack, M / Wooden, D / Woodney, L M / Woodward, C / Wu, Z-Y / Wu, J-H / Yamashita, T / Yang, B / Yang, Y-B / Yokogawa, S / Zook, A C / Zauderer, A / Zhao, X / Zhou, X / Zucconi, J-M

Science (New York, N.Y.)

2005 Volume 310, Issue 5746, Page(s) 265–269

Abstract: On 4 July 2005, many observatories around the world and in space observed the collision of Deep Impact with comet 9P/Tempel 1 or its aftermath. This was an unprecedented coordinated observational campaign. These data show that (i) there was new material ... ...

Abstract	On 4 July 2005, many observatories around the world and in space observed the collision of Deep Impact with comet 9P/Tempel 1 or its aftermath. This was an unprecedented coordinated observational campaign. These data show that (i) there was new material after impact that was compositionally different from that seen before impact; (ii) the ratio of dust mass to gas mass in the ejecta was much larger than before impact; (iii) the new activity did not last more than a few days, and by 9 July the comet's behavior was indistinguishable from its pre-impact behavior; and (iv) there were interesting transient phenomena that may be correlated with cratering physics.
MeSH term(s)	Cosmic Dust ; Jupiter ; Meteoroids ; Organic Chemicals ; Photometry
Chemical Substances	Cosmic Dust ; Organic Chemicals
Language	English
Publishing date	2005-10-14
Publishing country	United States
Document type	Journal Article ; Research Support, Non-U.S. Gov't ; Research Support, U.S. Gov't, Non-P.H.S.
ZDB-ID	128410-1
ISSN	1095-9203 ; 0036-8075
ISSN (online)	1095-9203
ISSN	0036-8075
DOI	10.1126/science.1118978
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Article: Deep Impact: Observations from a Worldwide Earth-Based Campaign

Meech, K. J / Ageorges, N / A'Hearn, M. F / Arpigny, C / Ates, A / Aycock, J / Bagnulo, S / Bailey, J / Barber, R / Barrena, R / Barrera, L / Bauer, J. M / Belton, M. J. S / Bensch, F / Bhattacharya, B / Biver, N / Blake, G / BockeleÌe-Morvan, D / Boehnhardt, H /

Bonev, B. P / Bonev, T / Buie, M. W / Burton, M. G / Butner, H. M / Cabanac, R / Campbell, R / Campins, H / Capria, M. T / Carroll, T / Chaffee, F / Charnley, S. B / Cleis, R / Coates, A / Cochran, A / Colom, P / Conrad, A / Coulson, I. M / Crovisier, J / de LeÌon, J / deBuizer, J / Dekany, R / Dello Russo, N / Delsanti, A / DiSanti, M / Drummond, J / Dundon, L / Etzel, P. B / Farnham, T. L / Feldman, P / FernaÌndez, Y. R / Filipovic, M. D / Fisher, S / Fitzsimmons, A / Fong, D / Fugate, R / Fujiwara, H / Fujiyoshi, T / Furusho, R / Fuse, T / Gibb, E / Groussin, O / Gulkis, S / Gurwell, M / Hadamcik, E / Hainaut, O / Harker, D / Harrington, D / Harwit, M / Hasegawa, S / Hergenrother, C. W / Hirst, P / Hodapp, K / Honda, M / Howell, E. S / HutsemeÌkers, D / Iono, D / Ip, W.-H / Jackson, W / Jehin, E / Jiang, Z. J / Jones, G. H / Jones, P. A / Kadono, T / KaÌufl, H. U / Kamath, U. W / Kasuga, T / Kawakita, H / Kelley, M. S / Kerber, F / Kidger, M / Kinoshita, D / Knight, M / Lara, L / Larson, S. M / Lederer, S / Lee, C.-F / Levasseur-Regourd, A. C / Li, J. Y / Li, Q.-S / Licandro, J / Lin, Z.-Y / Lisse, C. M / LoCurto, G / Lovell, A. J / Lowry, S. C / Lyke, J / Lynch, D / Ma, J / Magee-Sauer, K / Maheswar, G / Manfroid, J / Marco, O / Martin, P / Melnick, G / Miller, S / Miyata, T / Moriarty-Schieven, G. H / Moskovitz, N / Mueller, B. E. A / Mumma, M. J / Muneer, S / Neufeld, D. A / Ootsubo, T / Osip, D / Pandea, S. K / Pantin, E / Paterno-Mahler, R / Patten, B / Peck, A / Penprase, B. E / Petitas, G / Pinilla-Alonso, N / Pittichova, J / Pompei, E / Prabhu, T. P / Qi, C / Rao, R / Rauer, H / Reitsema, H / Rodgers, S. D / Rodriguez, P / Ruane, R / Ruch, G / Rujopakarn, W / Sahu, D. K / Sako, S / Sakon, I / Samarasinha, N / Sarkissian, J. M / Saviane, I / Schirmer, M / Schultz, P / Schulz, R / Seitzer, P / Sekiguchi, T / Selman, F / Serra-Ricart, M / Sharp, R / Snell, R. L / Snodgrass, C / Stallard, T / Stecklein, G / Sterken, C / StuÌwe, J. A / Sugita, S / Sumner, M / Suntzeff, N / Swaters, R / Takakuwa, S / Takato, N / Thomas-Osip, J / Thompson, E / Tokunaga, A. T / Tozzi, G. P / Tran, H / Troy, M / Trujillo, C / Van Cleve, J / Vasundhara, R / Vazquez, R / Vilas, F / Villanueva, G / von Braun, K / Vora, P / Wainscoat, R. J / Walsh, K / Watanabe, J / Weaver, H. A / Weaver, W / Weiler, M / Weissman, P. R / Welsh, W. F / Wilner, D / Wolk, S / Womack, M / Wooden, D / Woodney, L. M / Woodward, C / Wu, J.-H / Wu, Z.-Y / Yamashita, T / Yang, B / Yang, Y.-B / Yokogawa, S / Zauderer, A / Zhao, X / Zhou, X / Zook, A. C / Zucconi, J.-M

Science. 2005 Oct. 14, v. 310, no. 5746

2005

Abstract	On 4 July 2005, many observatories around the world and in space observed the collision of Deep Impact with comet 9P/Tempel 1 or its aftermath. This was an unprecedented coordinated observational campaign. These data show that (i) there was new material after impact that was compositionally different from that seen before impact; (ii) the ratio of dust mass to gas mass in the ejecta was much larger than before impact; (iii) the new activity did not last more than a few days, and by 9 July the comet's behavior was indistinguishable from its pre-impact behavior; and (iv) there were interesting transient phenomena that may be correlated with cratering physics.
Keywords	dust ; mass ; physics
Language	English
Dates of publication	2005-1014
Size	p. 265-269.
Document type	Article
ZDB-ID	128410-1
ISSN	1095-9203 ; 0036-8075
ISSN (online)	1095-9203
ISSN	0036-8075
DOI	10.1126/science.1118978
Database	NAL-Catalogue (AGRICOLA)

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Z 4' 46/137: Show issues
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In stock of ZB MED Bonn / Germany

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