Artykuł w czasopiśmie
Brak miniatury
Licencja
 

Gaia transients in galactic nuclei

Uproszczony widok
dc.abstract.enThe high spatial resolution and precise astrometry and photometry of the Gaia mission should make it particularly apt at discovering and resolving transients occurring in, or near, the centres of galaxies. Indeed, some nuclear transients are reported by the Gaia Science Alerts (GSA) team, but not a single confirmed tidal disruption event (TDE) has been published. In order to explore the sensitivity of GSA, we performed an independent and systematic search for nuclear transients using Gaia observations. Our transient search is driven from an input galaxy catalogue (derived from the Sloan Digital Sky Survey Release 12). We present a candidate detection metric that is independent from the existing GSA methodology, to see if Gaia Alerts are biased against the discovery of nuclear transients, and in particular which steps may have an impact. Our technique does require significant manual vetting of candidates, making implementation in the GSA system impractical for daily operations, although it could be run weekly, which for month-to-year long transients would make a scientifically valuable addition. Our search yielded ∼480 nuclear transients, five of which were alerted and published by GSA. The list of (in some cases ongoing) transients includes candidates for events related to enhanced accretion onto a supermassive black hole and TDEs. An implementation of the detection methodology and criteria used in this paper as an extension of GSA could open up the possibility for Gaia to fulfil the role as a main tool to find transient nuclear activity as predicted in the literature.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorKostrzewa-Rutkowska, Zuzanna
dc.contributor.authorJonker, P. G.
dc.contributor.authorHodgkin, S. T.
dc.contributor.authorWyrzykowski, Łukasz
dc.contributor.authorFraser, M.
dc.contributor.authorHarrison, D. L.
dc.contributor.authorRixon, G.
dc.contributor.authorYoldas, A.
dc.contributor.authorLeeuwen, F. van
dc.contributor.authorDelgado, A.
dc.contributor.authorLeeuwen, M. van
dc.contributor.authorKoposov, S. E.
dc.date.accessioned2024-01-25T02:02:49Z
dc.date.available2024-01-25T02:02:49Z
dc.date.copyright2018-08-12
dc.date.issued2018
dc.description.accesstimeBEFORE_PUBLICATION
dc.description.financeNie dotyczy
dc.description.number1
dc.description.versionORIGINAL_AUTHOR
dc.description.volume481
dc.identifier.doi10.1093/MNRAS/STY2221
dc.identifier.issn0035-8711
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/107711
dc.identifier.weblinkhttp://adsabs.harvard.edu/abs/2018MNRAS.481..307K
dc.languageeng
dc.pbn.affiliationastronomy
dc.relation.ispartofMonthly Notices of the Royal Astronomical Society
dc.relation.pages307-323
dc.rightsOther
dc.sciencecloudnosend
dc.titleGaia transients in galactic nuclei
dc.typeJournalArticle
dspace.entity.typePublication