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The OGLE Collection of Variable Stars: Nearly 66,000 Mira Stars in the Milky Way

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dc.abstract.enWe present a collection of 65,981 Mira-type variable stars found in the Optical Gravitational Lensing Experiment (OGLE) project database. Two-thirds of our sample (40,356 objects) are located in the Galactic bulge fields, whereas 25,625 stars are in the Galactic disk. The vast majority of the collection (47,532 objects) comprises new discoveries. We provide basic observational parameters of the Mira variables: equatorial coordinates, pulsation periods, I-band and V-band mean magnitudes, I-band brightness amplitudes, and identifications in other catalogs of variable stars. We also provide the I-band and V-band time-series photometry collected since 1997 during the OGLE-II, OGLE-III, and OGLE-IV phases. The classical selection process, i.e., being mostly based on the visual inspection of light curves by experienced astronomers, has led to the high purity of the catalog. As a result, this collection can be used as a training set for machine-learning classification algorithms. Using overlapping areas of adjacent OGLE fields, we estimate the completeness of the catalog to be about 96%. We compare and discuss the statistical features of Miras located in different regions of the Milky Way. We show examples of stars that change their type over time, from a semiregular variable to Mira and vice versa. This data set is perfectly suited to studying the three-dimensional structure of the Milky Way, and it may help to explain the puzzle of the X-shaped bulge.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorPoleski, Radosław
dc.contributor.authorSkowron, Jan
dc.contributor.authorKozłowski, Szymon
dc.contributor.authorSzymański, Michał
dc.contributor.authorGromadzki, Mariusz
dc.contributor.authorPietrukowicz, Paweł
dc.contributor.authorMróz, Przemysław
dc.contributor.authorUdalski, Andrzej
dc.contributor.authorSoszyński, Igor
dc.contributor.authorSkowron, Dorota
dc.contributor.authorRatajczak, Milena
dc.contributor.authorUlaczyk, Krzysztof
dc.contributor.authorIwanek, Patryk
dc.contributor.authorWrona, Marcin
dc.contributor.authorRybicki, Krzysztof
dc.date.accessioned2024-01-26T10:29:06Z
dc.date.available2024-01-26T10:29:06Z
dc.date.copyright2022-06-23
dc.date.issued2022
dc.description.accesstimeAT_PUBLICATION
dc.description.financeŚrodki finansowe, o których mowa w art. 365 pkt. 2 ustawy
dc.description.number2
dc.description.versionFINAL_PUBLISHED
dc.description.volume260
dc.identifier.doi10.3847/1538-4365/AC6676
dc.identifier.issn0067-0049
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/122756
dc.identifier.weblinkhttp://adsabs.harvard.edu/abs/2022ApJS..260...46I
dc.languageeng
dc.pbn.affiliationastronomy
dc.relation.ispartofAstrophysical Journal, Supplement Series
dc.relation.pages46
dc.rightsCC-BY
dc.sciencecloudnosend
dc.titleThe OGLE Collection of Variable Stars: Nearly 66,000 Mira Stars in the Milky Way
dc.typeJournalArticle
dspace.entity.typePublication