Published February 25, 2021
| Version v1
Poster
Open
UCAC2 46706450: A rapidly rotating K-type subgiant with an extremely hot white dwarf companion
Creators
- 1. Institut für Physik und Astronomie, Universität Potsdam, Karl-Liebknecht-Straße 24/25, Germany
- 2. Institut für Astronomie und Astrophysik, Kepler Center forAstro and Particle Physics, Eberhard Karls Universität, Sand 1, 72076Tübingen, Germany
- 3. Departament de Física, Universitat Politècnica de Catalunya, c/Esteve Terrades 5, E-08860 Castelldefels, Spain
- 4. National Astronomical Research Institute of Thailand, Sirindhorn AstroPark, Donkaew, Mae Rim, Chiang Mai 50180, Thailand
- 5. Key Laboratory of Space Astronomy and Technology, NationalAstronomical Observatories, Chinese Academy of Sciences, Beijing 100101, P. R. China
Description
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.
Files
CoolStars_NReindl.pdf
Files
(1.1 MB)
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