Detection of regular low-amplitude photometric variability of the magnetic dwarf WD0009+501. on the possibility of photometric investigation of exoplanets on the basis of 1-meter class telescopes of the special and crimean astrophysical observatories

被引：18

作者：

Valeev, A. F. ^{[1
,2
]}

Antonyuk, K. A. ^{[1
,3
,4
]}

Pit, N. V. ^{[3
]}

Solovyev, V. Ya. ^{[2
]}

Burlakova, T. E. ^{[1
]}

Moskvitin, A. S. ^{[1
]}

Grauzhanina, A. O. ^{[1
,2
]}

Gadelshin, D. R. ^{[1
]}

Shulyak, D. ^{[5
]}

Fatkhullin, T. A. ^{[1
]}

Galazutdinov, G. A. ^{[1
,6
,7
]}

Malogolovets, E. V. ^{[1
]}

Beskin, G. M. ^{[1
,2
]}

Karpov, S. V. ^{[1
]}

Dyachenko, V. V. ^{[1
]}

Rastegaev, D. A. ^{[1
]}

Rzaev, A. Kh. ^{[1
]}

Valyavin, G. G. ^{[1
]}

机构：

[1] Russian Acad Sci, Special Astrophys Observ, Nizhnii Arkhyz 369167, Russia

[2] Kazan Fed Univ, Kazan 420008, Russia

[3] Crimean Astrophys Observ, Nauchny 298409, Russia

[4] Russian Acad Sci, Space Res Inst, Moscow 117997, Russia

[5] Univ Gottingen, Inst Astrophys, D-37077 Gottingen, Germany

[6] Univ Catplica Norte, Inst Astron, Antofagasta, Chile

[7] Russian Acad Sci, Cent Astron Observ Pulkovo, St Petersburg 196140, Russia

来源：

ASTROPHYSICAL BULLETIN | 2015年 / 70卷 / 03期

基金：

俄罗斯基础研究基金会; 俄罗斯科学基金会;

关键词：

white dwarfs; stars: magnetic field; planetary systems; stars: individual: WD0009+501; WHITE-DWARFS; FIELDS; MISSION; PLANETS; SYSTEM; STARS;

D O I：

10.1134/S1990341315030104

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present the results of photometric observations of the weak magnetic white dwarf WD 0009+501. The observations were carried out for two years with the 1-m telescopes of the Special and Crimean Astrophysical Observatories. As a result of these observations, we detected regular V -band luminosity variations with a period of P a parts per thousand 8 hours. The amplitude of the variability is stable on timescales greater than two years and amounts to 11 +/- 1 mmag. The difference in the variability amplitude from observations with different telescopes is 1-3 mmag. The result is interpreted within the concept of a rotation-modulated variability of magnetic properties of the star's atmosphere. We also discuss a possible variability due to the presence of planetary companions around stars of this type. The results of monitoring were used to explore the capabilities of the telescopes for exoplanet investigation. We studied the dependences between the characteristic times of exposures, magnitudes of the objects, and a threshold level of the expected variability amplitudes for all the telescopes involved in our program. A program of exoplanet monitoring with the mentioned telescopes was drawn up for the next few years based on the results of the study.

引用

页码：318 / 327

页数：10

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