Search for and study of photometric variability in magnetic white dwarfs

A. F. Valeev; K. A. Antonyuk; N. V. Pit; A. S. Moskvitin; A. O. Grauzhanina; D. R. Gadelshin; S. V. Kolesnikov; E. A. Zhuzhulina; T. E. Burlakova; G. A. Galazutdinov; A. G. Gutaev; R. Ya. Zhuchkov; A. I. Ikhsanova; D. G. Zhukov; Arti Joshi; J. C. Pandey; A. F. Kholtygin; G. G. Valyavin

doi:10.1134/S1990341317030051

Search for and study of photometric variability in magnetic white dwarfs

Authors: Valeev A.F.¹^,2, Antonyuk K.A.³^,1, Pit N.V.³, Moskvitin A.S.¹^,2, Grauzhanina A.O.¹, Gadelshin D.R.¹, Kolesnikov S.V.³^,4, Zhuzhulina E.A.⁵, Burlakova T.E.¹, Galazutdinov G.A.⁶^,7^,1, Gutaev A.G.², Zhuchkov R.Y.²^,7, Ikhsanova A.I.², Zhukov D.G.², Joshi A.⁸, Pandey J.C.⁸, Kholtygin A.F.⁹, Valyavin G.G.¹
Affiliations:
1. Special Astrophysical Observatory
2. Kazan (Volga Region) Federal University
3. Crimean Astrophysical Observatory
4. Astronomical Observatory
5. V. I. Vernadsky Crimean Federal University
6. Instituto de Astronomia
7. Main (Pulkovo) Astronomical Observatory
8. Aryabhatta Research Institute of Observational Sciences
9. Sobolev Astronomical Institute
Issue: Vol 72, No 1 (2017)
Pages: 44-50
Section: Article
URL: https://journal-vniispk.ru/1990-3413/article/view/212360
DOI: https://doi.org/10.1134/S1990341317030051
ID: 212360

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Abstract

We report the results of photometric observations of a number of magnetic white dwarfs in order to search for photometric variability in these stars. These V-band observations revealed significant variability in the classical highly magnetized white dwarf GRW+70◦8247 with a likely period from several days to several dozen days and a half-amplitude of about 0_.^m 04. Our observations also revealed the variability of the well-known white dwarf GD229. The half amplitude of its photometric variability is equal to about 0_.^m 005, and the likely period of this degenerate star lies in the 10–20 day interval. This variability is most likely due to the rotation of the stars considered.We also discuss the peculiarities of the photometric variability in a number of other white dwarfs. We present the updated “magnetic field–rotation period” diagram for the white dwarfs.

Keywords

white dwarfs, stars: magnetic field, planetary systems

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Search for and study of photometric variability in magnetic white dwarfs

Full Text

Abstract

Keywords

About the authors

Supplementary files