I-band photometry of the quiescent black hole X-ray nova GROJ0422 + 32 = V518 Per: modelling of the orbital light curve and estimation of the black hole mass

Cherepashchuk, A.M.; Khruzina, T.S.; Atapin, K.E.

Авторы: Cherepashchuk A.M., Khruzina T.S., Atapin K.E.
Журнал: Monthly Notices of the Royal Astronomical Society
Том: 531
Номер: 4
Год издания: 2024
Издательство: Oxford Journals, Oxford University Press
Местоположение издательства: Oxford, UK, England
Первая страница: 4917
Последняя страница: 4928
DOI: 10.1093/mnras/stae1421
Аннотация: We present new photometric observations of the X-ray nova GRO J0422 + 32 (V518 Per) carried out in the I_c band over 14nights in 2020–2023. We had to revise the orbital period of the system, the new value P_orb = 5^h04^m35^s.50 ± 0^s.04 is about one minute shorter than the period by Webb et al. but close to the result reported earlier by Filippenko, Matheson & Ho. The obtained folded light curve has a regular shape with a clear ellipticity effect and signatures of a slight heating effect. The simulations of this light curve in terms of the model of an interacting binary system allowed us to estimate the orbital inclination i = 33°– 49° of the system and derive masses of the black hole M_x = (6.5 ± 2.9) M_sun and companion star M_v = (0.47 ± 0.21) M_sun. This range of the black hole masses overlaps with the known gap of (2–5) M_sun in the distribution of compact objects masses but mostly it lies above the upper boundary of this gap. To obtain more precise estimates one needs to know the degree of heating of the donor star, so synchronous X-ray/optical observations of this system are desirable.
Добавил в систему: Черепащук Анатолий Михайлович

	ИСТИНА	Войти в систему Регистрация
	ИПМех РАН
	Главная Поиск Статистика О проекте Помощь

ИСТИНА

ИПМех РАН

I-band photometry of the quiescent black hole X-ray nova GROJ0422 + 32 = V518 Per: modelling of the orbital light curve and estimation of the black hole massстатья

Прикрепленные файлы