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UCAC2 46706450: A rapidly rotating K-type subgiant with an extremely hot white dwarf companion

descriptionPublicationkeyboard_double_arrow_right Conference object , Other literature type 25 Feb 2021 English Publisher:Zenodo
Authors: Nicole Reindl; Klaus Werner; Lisa Löbling; Ingrid Pelisoli; Veronika Schaffenroth; Alberto Rebassa-Mansergas; Puji Irawati; +1 Authors

doi: 10.5281/zenodo.4563207 , 10.5281/zenodo.4563208

UCAC2 46706450: A rapidly rotating K-type subgiant with an extremely hot white dwarf companion

Abstract

F, G, or K-type stars with a white dwarf companion are relatively rarely known systems in comparison to thousands of M stars with white dwarf companions. We have recently studied one of those systems in detail, and found that the sub-components are very rare stars on their own. The UV source in our system turned out to be an extremely hot white dwarf with an effective temperature of 105,000K. The K-type star was found to be chromospherically active and one of the most rapidly rotating sub-giant known (v_rot=151km/s). Here we present the results of our analysis.

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