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The OGLE Collection of Variable Stars. Type II Cepheids in the Magellanic System

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cris.lastimport.scopus2024-02-12T19:56:51Z
dc.abstract.enWe present a nearly complete collection of type II Cepheids in the Magellanic System. The sample consists of 338 objects: 285 and 53 variables in the Large and Small Magellanic Clouds, respectively. Based on the pulsation periods and light-curve morphology, we classified 118 of our type II Cepheids as BL Her, 120 as W Vir, 34 as peculiar W Vir, and 66 as RV Tau stars. For all objects, we publish time-series VI photometry obtained during the OGLE-IV survey, from 2010 to the end of 2017. We present the most interesting individual objects in our collection: 16 type II Cepheids showing additional eclipsing or ellipsoidal variability, two RV Tau variables more than 2.5 mag fainter than other stars of this type in the LMC, an RVb star that drastically decreased the amplitude of the long-period modulation, type II Cepheids exhibiting significant amplitude and period changes, and an RV Tau star which undergoes interchanges of deep and shallow minima. We show that peculiar W Vir stars have markedly different spatial distribution than other subclasses of type II Cepheids, which indicates different evolutionary histories of these objects.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorSoszyński, Igor
dc.contributor.authorUdalski, Andrzej
dc.contributor.authorSzymański, Michał
dc.contributor.authorWyrzykowski, Łukasz
dc.contributor.authorUlaczyk, Krzysztof
dc.contributor.authorPoleski, Radosław
dc.contributor.authorPietrukowicz, Paweł
dc.contributor.authorKozłowski, Szymon
dc.contributor.authorSkowron, Dorota
dc.contributor.authorSkowron, Jan
dc.contributor.authorMróz, Przemysław
dc.contributor.authorRybicki, Krzysztof
dc.contributor.authorIwanek, Patryk
dc.date.accessioned2024-01-26T10:29:08Z
dc.date.available2024-01-26T10:29:08Z
dc.date.copyright2018-06-29
dc.date.issued2018
dc.description.accesstimeBEFORE_PUBLICATION
dc.description.financeNie dotyczy
dc.description.number2
dc.description.versionORIGINAL_AUTHOR
dc.description.volume68
dc.identifier.doi10.32023/0001-5237/68.2.1
dc.identifier.issn0001-5237
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/122759
dc.identifier.weblinkhttp://adsabs.harvard.edu/abs/2018AcA....68...89S
dc.languageeng
dc.pbn.affiliationastronomy
dc.relation.ispartofActa Astronomica
dc.relation.pages89-109
dc.rightsOther
dc.sciencecloudnosend
dc.titleThe OGLE Collection of Variable Stars. Type II Cepheids in the Magellanic System
dc.typeJournalArticle
dspace.entity.typePublication