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  1. Artikel ; Online: Jupiter-like planets might be common in a low-density environment.

    Gratton, Raffaele / Mesa, Dino / Bonavita, Mariangela / Zurlo, Alice / Marino, Sebastian / Kervella, Pierre / Desidera, Silvano / D'Orazi, Valentina / Rigliaco, Elisabetta

    Nature communications

    2023  Band 14, Heft 1, Seite(n) 6232

    Abstract: Radial velocity surveys suggest that the Solar System may be unusual and that Jupiter-like planets have a frequency < 20% around solar-type stars. However, they may be much more common in one of the closest associations in the solar neighbourhood. Young ... ...

    Abstract Radial velocity surveys suggest that the Solar System may be unusual and that Jupiter-like planets have a frequency < 20% around solar-type stars. However, they may be much more common in one of the closest associations in the solar neighbourhood. Young moving stellar groups are the best targets for direct imaging of exoplanets and four massive Jupiter-like planets have been already discovered in the nearby young β Pic Moving Group (BPMG) via high-contrast imaging, and four others were suggested via high precision astrometry by the European Space Agency's Gaia satellite. Here we analyze 30 stars in BPMG and show that 20 of them might potentially host a Jupiter-like planet as their orbits would be stable. Considering incompleteness in observations, our results suggest that Jupiter-like planets may be more common than previously found. The next Gaia data release will likely confirm our prediction.
    Sprache Englisch
    Erscheinungsdatum 2023-10-17
    Erscheinungsland England
    Dokumenttyp Journal Article
    ZDB-ID 2553671-0
    ISSN 2041-1723 ; 2041-1723
    ISSN (online) 2041-1723
    ISSN 2041-1723
    DOI 10.1038/s41467-023-41665-0
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  2. Artikel ; Online: Orbital period change of Dimorphos due to the DART kinetic impact.

    Thomas, Cristina A / Naidu, Shantanu P / Scheirich, Peter / Moskovitz, Nicholas A / Pravec, Petr / Chesley, Steven R / Rivkin, Andrew S / Osip, David J / Lister, Tim A / Benner, Lance A M / Brozović, Marina / Contreras, Carlos / Morrell, Nidia / Rożek, Agata / Kušnirák, Peter / Hornoch, Kamil / Mages, Declan / Taylor, Patrick A / Seymour, Andrew D /
    Snodgrass, Colin / Jørgensen, Uffe G / Dominik, Martin / Skiff, Brian / Polakis, Tom / Knight, Matthew M / Farnham, Tony L / Giorgini, Jon D / Rush, Brian / Bellerose, Julie / Salas, Pedro / Armentrout, William P / Watts, Galen / Busch, Michael W / Chatelain, Joseph / Gomez, Edward / Greenstreet, Sarah / Phillips, Liz / Bonavita, Mariangela / Burgdorf, Martin J / Khalouei, Elahe / Longa-Peña, Penélope / Rabus, Markus / Sajadian, Sedighe / Chabot, Nancy L / Cheng, Andrew F / Ryan, William H / Ryan, Eileen V / Holt, Carrie E / Agrusa, Harrison F

    Nature

    2023  Band 616, Heft 7957, Seite(n) 448–451

    Abstract: The Double Asteroid Redirection Test (DART) spacecraft successfully performed the first test of a kinetic impactor for asteroid deflection by impacting Dimorphos, the secondary of near-Earth binary asteroid (65803) Didymos, and changing the orbital ... ...

    Abstract The Double Asteroid Redirection Test (DART) spacecraft successfully performed the first test of a kinetic impactor for asteroid deflection by impacting Dimorphos, the secondary of near-Earth binary asteroid (65803) Didymos, and changing the orbital period of Dimorphos. A change in orbital period of approximately 7 min was expected if the incident momentum from the DART spacecraft was directly transferred to the asteroid target in a perfectly inelastic collision
    Sprache Englisch
    Erscheinungsdatum 2023-03-01
    Erscheinungsland England
    Dokumenttyp Journal Article ; Research Support, Non-U.S. Gov't ; Research Support, U.S. Gov't, Non-P.H.S.
    ZDB-ID 120714-3
    ISSN 1476-4687 ; 0028-0836
    ISSN (online) 1476-4687
    ISSN 0028-0836
    DOI 10.1038/s41586-023-05805-2
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  3. Buch ; Online: Ejecta Evolution Following a Planned Impact into an Asteroid

    Kareta, Theodore / Thomas, Cristina / Li, Jian-Yang / Knight, Matthew M. / Moskovitz, Nicholas / Rozek, Agata / Bannister, Michele T. / Ieva, Simone / Snodgrass, Colin / Pravec, Petr / Ryan, Eileen V. / Ryan, William H. / Fahnestock, Eugene G. / Rivkin, Andrew S. / Chabot, Nancy / Fitzsimmons, Alan / Osip, David / Lister, Tim / Sarid, Gal /
    Hirabayashi, Masatoshi / Farnham, Tony / Tancredi, Gonzalo / Michel, Patrick / Wainscoat, Richard / Weryk, Rob / Burrati, Bonnie / Pittichova, Jana / Ridden-Harper, Ryan / Tan, Nicole J. / Tristram, Paul / Brown, Tyler / Bonavita, Mariangela / Burgdorf, Martin / Khalouei, Elahe / Longa, Penelope / Rabus, Markus / Sajadian, Sedighe / Jorgensen, Uffe Graae / Dominik, Martin / Kikwaya, Jean-Baptiste / Epifani, Elena Mazzotta / Dotto, Elisabetta / Deshapriya, J. D. Prasanna / Hasselmann, Pedro H. / Dall'Ora, Massimo / Abe, Lyu / Guillot, Tristan / Mekarnia, Djamel / Agabi, Abdelkrim / Bendjoya, Philippe / Suarez, Olga / Triaud, Amaury / Gasparetto, Thomas / Gunther, Maximillian N. / Kueppers, Michael / Merin, Bruno / Chatelain, Joseph / Gomez, Edward / Usher, Helen / Stoddard-Jones, Cai / Bartnik, Matthew / Bellaver, Michael / Chetan, Brenna / Dugan, Emma / Fallon, Tori / Fedewa, Jeremy / Gerhard, Caitlyn / Jacobson, Seth A. / Painter, Shane / Peterson, David-Michael / Rodriguez, Joseph E. / Smith, Cody / Sokolovsky, Kirill V. / Sullivan, Hannah / Townley, Kate / Watson, Sarah / Webb, Levi / Trigo-Rodrıguez, Josep M. / Llenas, Josep M. / Perez-Garcıa, Ignacio / Castro-Tirado, A. J. / Vincent, Jean-Baptiste / Migliorini, Alessandra / Lazzarin, Monica / La Forgia, Fiorangela / Ferrari, Fabio / Polakis, Tom / Skiff, Brian

    The First Five Weeks

    2023  

    Abstract: The impact of the DART spacecraft into Dimorphos, moon of the asteroid Didymos, changed Dimorphos' orbit substantially, largely from the ejection of material. We present results from twelve Earth-based facilities involved in a world-wide campaign to ... ...

    Abstract The impact of the DART spacecraft into Dimorphos, moon of the asteroid Didymos, changed Dimorphos' orbit substantially, largely from the ejection of material. We present results from twelve Earth-based facilities involved in a world-wide campaign to monitor the brightness and morphology of the ejecta in the first 35 days after impact. After an initial brightening of ~1.4 magnitudes, we find consistent dimming rates of 0.11-0.12 magnitudes/day in the first week, and 0.08-0.09 magnitudes/day over the entire study period. The system returned to its pre-impact brightness 24.3-25.3 days after impact through the primary ejecta tail remained. The dimming paused briefly eight days after impact, near in time to the appearance of the second tail. This was likely due to a secondary release of material after re-impact of a boulder released in the initial impact, through movement of the primary ejecta through the aperture likely played a role.

    Comment: 16 pages, 5 Figures, accepted in the Astrophysical Journal Letters (ApJL) on October 16, 2023
    Schlagwörter Astrophysics - Earth and Planetary Astrophysics
    Thema/Rubrik (Code) 306
    Erscheinungsdatum 2023-10-18
    Erscheinungsland us
    Dokumenttyp Buch ; Online
    Datenquelle BASE - Bielefeld Academic Search Engine (Lebenswissenschaftliche Auswahl)

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