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Identifying and characterizing ultracool dwarfs ejected from post-encounter disintegrating systems

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dc.abstract.enDisintegrating multiple systems have been previously discovered from kinematic studies of the Hipparcos catalogue. They are presumably the result of dynamical encounters taking place in the Galactic disc between single/multiple systems. In this paper, we aim to expand the search for such systems, to study their properties, as well as to characterize possible low-mass ejecta (i.e. brown dwarfs and planets). We have assembled a list of 15 candidate systems using astrometry from the Tycho-Gaia astrometric solution (later upgraded with Gaia DR3), and here we present the discovery and follow-up of five of them. We have obtained DECam imaging for all five systems and by combining near-infrared photometry and proper motion, we searched for ultracool ejected components. We find that the system consisting of TYC 7731-1951-1, TYC 7731-2128 AB, and TYC 7731-1995-1ABC?, contains one very promising ultracool dwarf candidate. Using additional data from the literature, we have found that three out of five disintegrating system candidates are likely to be true disintegrating systems.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorYip, Alexandra K. P.
dc.contributor.authorKurtev, Radostin
dc.contributor.authorPinfield, David J.
dc.contributor.authorMarocco, Federico
dc.contributor.authorGromadzki, Mariusz
dc.contributor.authorCarballo-Bello, Julio A.
dc.date.accessioned2024-01-25T03:43:41Z
dc.date.available2024-01-25T03:43:41Z
dc.date.copyright2023-04-05
dc.date.issued2023
dc.description.accesstimeBEFORE_PUBLICATION
dc.description.financePublikacja bezkosztowa
dc.description.number2
dc.description.versionORIGINAL_AUTHOR
dc.description.volume522
dc.identifier.doi10.1093/MNRAS/STAD1037
dc.identifier.issn0035-8711
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/108889
dc.identifier.weblinkhttp://adsabs.harvard.edu/abs/2023MNRAS.522.1669Y
dc.languageeng
dc.pbn.affiliationastronomy
dc.relation.ispartofMonthly Notices of the Royal Astronomical Society
dc.relation.pages1669-1685
dc.rightsOther
dc.sciencecloudnosend
dc.titleIdentifying and characterizing ultracool dwarfs ejected from post-encounter disintegrating systems
dc.typeJournalArticle
dspace.entity.typePublication