Препринт

Photometry of the Didymos system across the DART impact apparition

Nicholas MoskovitzLowell Observatory , 1400 West Mars Hill Road , Flagstaff , AZ 86004 , USACristina A. ThomasNorthern Arizona UniversityPetr PravecAstronomical Institute of the Academy of Sciences of the Czech Republic , Fričova 298 , Ondřejov , CZ-25165 , Czech RepublicTim ListerLas Cumbres Observatory 5 Las Campanas Observatory , ChileTom PolakisLowell Observatory , 1400 West Mars Hill Road , Flagstaff , AZ 86004 , USAD. J. OsipDepartment of Astronomy , University of WashingtonTheodore KaretaLowell Observatory , 1400 West Mars Hill Road , Flagstaff , AZ 86004 , USAAgata RożekSteven R. ChesleyJet Propulsion Laboratory , California Institute of Technology California , USAShantanu P. NaiduJet Propulsion Laboratory , California Institute of Technology California , USAP. ScheirichAstronomical Institute of the Academy of Sciences of the Czech Republic , Fričova 298 , Ondřejov , CZ-25165 , Czech RepublicW. H. RyanNew Mexico Institute of Mining and Technology/Magdalena Ridge Observatory , 801 Leroy Place , Socorro , NM 87801E. V. RyanNew Mexico Institute of Mining and Technology/Magdalena Ridge Observatory , 801 Leroy Place , Socorro , NM 87801B. A. SkiffLowell Observatory , 1400 West Mars Hill Road , Flagstaff , AZ 86004 , USAC. SnodgrassInstitute for Astronomy , University of Edinburgh , Royal Observatory , Edinburgh , EH9 3HJ , UKMatthew M. KnightPhysics Department , United States Naval Academy , 572C Holloway Rd , Annapolis , MD 21402 , USAA. S. RivkinJohns Hopkins University Applied Physics LaboratoryN. L. ChabotJohns Hopkins University Applied Physics LaboratoryV. AyvazianE. Kharadze Georgian National Astrophysical Observatory , Abastumani , GeorgiaI. N. BelskayaObservatoire de ParisZ. BenkhaldounOukaïmeden Observatory , High Energy Physics and Astrophysics Laboratory , Cadi Ayyad University , BP 2390 , Marrakech , MoroccoD. BerteşteanuM. BonavitaInstitute for Astronomy , University of Edinburgh , Royal Observatory , Edinburgh , EH9 3HJ , UKT. H. BressiLPL/UAMelissa J. BruckerLPL/UAM. BurgdorfUniversität Hamburg , Faculty of Mathematics , Informatics and Natural Sciences , Department of Earth Sciences , Meteorological Institute , Bundesstraße 55 , 20146 Hamburg , GermanyО. БурхоновUlugh Beg Astronomical Institute , Tashkent , UzbekistanBrian BurtLowell Observatory , 1400 West Mars Hill Road , Flagstaff , AZ 86004 , USAC. ContrerasDepartment of Astronomy , University of WashingtonJoseph ChatelainLas Cumbres Observatory 5 Las Campanas Observatory , ChileYoung‐Jun ChoiUniversity of Science and Technology , 217 , Gajeong-ro , Yuseong-gu , Daejeon 34113 , KoreaMatthew DailyLas Cumbres Observatory 5 Las Campanas Observatory , ChileJ. de LeónK. E. ErgashevUlugh Beg Astronomical Institute , Tashkent , UzbekistanT. L. FarnhamDepartment of Astronomy , University of WashingtonPetr FatkaAstronomical Institute of the Academy of Sciences of the Czech Republic , Fričova 298 , Ondřejov , CZ-25165 , Czech RepublicMarin FerraisFlorida Space Institute , University of Central Florida , 12354 Research Parkway , Orlando , FL , 32826 , USAStefan GeierGran Telescopio Canarias (GRANTECAN) , Cuesta de San José s/n , E-38712 , Breña Baja , La Palma , SpainEdward GomezLas Cumbres Observatory 5 Las Campanas Observatory , ChileSarah GreenstreetH. GröllerC. W. HergenrotherCarrie E. HoltDepartment of Astronomy , University of WashingtonK. HornochAstronomical Institute of the Academy of Sciences of the Czech Republic , Fričova 298 , Ondřejov , CZ-25165 , Czech RepublicMarek HusárikR. InasaridzeSamtskhe-Javakheti State University , Akhaltsikhe , GeorgiaEmmanuël JehinSpace sciences, Technologies & Astrophysics Research (STAR) Institute , University of Liège , BelgiumElahe KhaloueiAstronomy Research Center , Research Institute of Basic Sciences , Seoul National University , 1 Gwanak-ro , Gwanak-gu , Seoul 08826 , KoreaJean-Baptiste Kikwaya EluoMyung-Jin KimKorea Astronomy and Space Science Institute , 776 , Daedeokdae-ro , Yuseong-gu , Daejeon 34055 , KoreaYu. N. KruglyInstitute of Astronomy , V.N. Karazin Kharkiv National University , Kharkiv , UkraineH. KučákováP. KušnirákJeffrey A. LarsenUSNA 36 Centro de Astronomía , Universidad de Antofagasta , Av. Angamos 601 , Antofagasta , ChileHee-Jae LeeKorea Astronomy and Space Science Institute , 776 , Daedeokdae-ro , Yuseong-gu , Daejeon 34055 , KoreaCassandra LejolyLPL/UAJ. LicandroInstituto de Astrofísica de Canarias 22 University of MarylandPenélope Longa-PeñaR. A. MastalerLPL/UACurtis McCullyLas Cumbres Observatory 5 Las Campanas Observatory , ChileHong-Kyu MoonKorea Astronomy and Space Science Institute , 776 , Daedeokdae-ro , Yuseong-gu , Daejeon 34055 , KoreaN. MorrellDepartment of Astronomy , University of WashingtonArushi NathDagmara OszkiewiczAstronomical Observatory Institute , Faculty of Physics , Adam Mickiewicz University , S loneczna 36 , 60-286 Poznań , PolandDaniel ParrottTycho Tracker 39 Department of Physics , University of California , Santa BarbaraLiz PhillipsLas Cumbres Observatory 5 Las Campanas Observatory , ChileMarcel PopescuAstronomical Institute of the Romanian Academy , 5 Cut ¸itul de Argint , 040557 Bucharest , RomaniaDonald P. PrayGeorge Pantelimon ProdanM. RabusDepartamento de Matemática y Física Aplicadas , Facultad de Ingeniería , Universidad Católica de la Santísima Concepción , Alonso de Rivera 2850 , Concepción , ChileM. T. ReadLPL/UAI. RevaFesenkov Astrophysical Institute , Almaty , KazakhstanVernon RoarkUniversity of Hawaii SystemT. Santana-RosUniversitat de BarcelonaJ. V. ScottiLPL/UATaiyo TataraUSNA 36 Centro de Astronomía , Universidad de Antofagasta , Av. Angamos 601 , Antofagasta , ChileAudrey ThirouinLowell Observatory , 1400 West Mars Hill Road , Flagstaff , AZ 86004 , USAD. J. TholenUniversity of HawaiiVolodymyr TroianskyiA. F. TubbioloLPL/UAKatelyn VillaPhysics Department , United States Naval Academy , 572C Holloway Rd , Annapolis , MD 21402 , USA

2023en

ABI

Аннотация

On 26 September 2022, the Double Asteroid Redirection Test (DART) spacecraft impacted Dimorphos, the satellite of binary near-Earth asteroid (65803) Didymos. This demonstrated the efficacy of a kinetic impactor for planetary defense by changing the orbital period of Dimorphos by 33 minutes (Thomas et al. 2023). Measuring the period change relied heavily on a coordinated campaign of lightcurve photometry designed to detect mutual events (occultations and eclipses) as a direct probe of the satellite's orbital period. A total of 28 telescopes contributed 224 individual lightcurves during the impact apparition from July 2022 to February 2023. We focus here on decomposable lightcurves, i.e. those from which mutual events could be extracted. We describe our process of lightcurve decomposition and use that to release the full data set for future analysis. We leverage these data to place constraints on the post-impact evolution of ejecta. The measured depths of mutual events relative to models showed that the ejecta became optically thin within the first ~1 day after impact, and then faded with a decay time of about 25 days. The bulk magnitude of the system showed that ejecta no longer contributed measurable brightness enhancement after about 20 days post-impact. This bulk photometric behavior was not well represented by an HG photometric model. An HG1G2 model did fit the data well across a wide range of phase angles. Lastly, we note the presence of an ejecta tail through at least March 2023. Its persistence implied ongoing escape of ejecta from the system many months after DART impact.

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Идентификаторы

DOI: 10.48550/arxiv.2311.01971

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