A New Variable in the Field of WD1145+017

ALEXANDER V. SEREBRYANSKIY

2019

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DOI 10.22444/ibvs.6264
Data confidence 70 medium
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Abstract

Revisit of the CCD archive obtained during long-time monitoring of the white dwarf WD1145+015 at Tien-Shan Observatory revealed a new variable star, identified as Gaia DR2 3796400796427214848.It was inferred that this star is of spectral type G7V-G8V.The amount of photometric data allows performing detailed analysis of this target, revealing its rotational-modulation variability.The period of variation is 6.33 h which makes this star an ultra-fast rotator.The stability of variability might be due to "magnetic saturation" of the angular momentum loss.Yet another possible interpretation of the brightness variation is an elliptical variable binary system.