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A Three-dimensional Map of the Milky Way Using 66,000 Mira Variable Stars

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cris.lastimport.scopus2024-02-12T19:51:57Z
dc.abstract.enWe study the three-dimensional structure of the Milky Way using 65,981 Mira variable stars discovered by the Optical Gravitational Lensing Experiment survey. The spatial distribution of the Mira stars is analyzed with a model containing three barred components that include the X-shaped boxy component in the Galactic center (GC) and an axisymmetric disk. We take into account the distance uncertainties by implementing the Bayesian hierarchical inference method. The distance to the GC is R <SUB>0</SUB> = 7.66 ± 0.01(stat.) ± 0.39(sys.) kpc, while the inclination of the major axis of the bulge to the Sun-GC line of sight is θ = 20.°2 ± 0.°6(stat.) ± 0.°7(sys.). We present, for the first time, a detailed three-dimensional map of the Milky Way composed of young and intermediate-age stellar populations. Our analysis provides independent evidence for both the X-shaped bulge component and the flaring disk (being plausibly warped). We provide the complete data set of properties of Miras that were used for calculations in this work. The table includes mean brightness and amplitudes in nine photometric bands (covering a range of wavelengths from 0.5 to 12 μm), photometric chemical type, estimated extinction, and calculated distance with its uncertainty for each Mira variable. The median distance accuracy to a Mira star is at the level of 6.6%.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorIwanek, Patryk
dc.contributor.authorPoleski, Radosław
dc.contributor.authorKozłowski, Szymon
dc.contributor.authorSoszyński, Igor
dc.contributor.authorPietrukowicz, Paweł
dc.contributor.authorBan, Makiko
dc.contributor.authorSkowron, Jan
dc.contributor.authorMróz, Przemysław
dc.contributor.authorWrona, Marcin
dc.contributor.authorUdalski, Andrzej
dc.contributor.authorSzymański, Michał
dc.contributor.authorSkowron, Dorota
dc.contributor.authorUlaczyk, Krzysztof
dc.contributor.authorGromadzki, Mariusz
dc.contributor.authorRybicki, Krzysztof
dc.contributor.authorRatajczak, Milena
dc.date.accessioned2024-01-24T18:13:37Z
dc.date.available2024-01-24T18:13:37Z
dc.date.copyright2023-01-11
dc.date.issued2023
dc.description.accesstimeAT_PUBLICATION
dc.description.financeŚrodki finansowe, o których mowa w art. 365 pkt. 2 ustawy
dc.description.number1
dc.description.versionFINAL_PUBLISHED
dc.description.volume264
dc.identifier.doi10.3847/1538-4365/ACAD7A
dc.identifier.issn0067-0049
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/101901
dc.identifier.weblinkhttp://adsabs.harvard.edu/abs/2023ApJS..264...20I
dc.languageeng
dc.pbn.affiliationastronomy
dc.relation.ispartofAstrophysical Journal, Supplement Series
dc.relation.pages20
dc.rightsCC-BY
dc.sciencecloudnosend
dc.titleA Three-dimensional Map of the Milky Way Using 66,000 Mira Variable Stars
dc.typeJournalArticle
dspace.entity.typePublication