КФУ. Карточка публикации. Full orbital solution for the binary system in the northern Galactic disc microlensing event Gaia16aye

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FULL ORBITAL SOLUTION FOR THE BINARY SYSTEM IN THE NORTHERN GALACTIC DISC MICROLENSING EVENT GAIA16AYE

Форма представления

Статьи в зарубежных журналах и сборниках

Год публикации

2020

Язык

английский

Авторы, сотрудники КФУ

Бикмаев Ильфан Фяритович, автор

Гутаев Алексей Геннадьевич, автор

Библиографическое описание на языке оригинала

Wyrzykowski L., Mroz P., Rybicki K. A., Full orbital solution for the binary system in the northern Galactic disc microlensing event Gaia16aye//ASTRONOMY & ASTROPHYSICS. - 2020. - Vol.633, Is.. - Art. №A98.

Аннотация

Gaia16aye was a binary microlensing event discovered in the direction towards the northern Galactic disc and was one of the first microlensing events detected and alerted to by the Gaia space mission. Its light curve exhibited five distinct brightening episodes, reaching up to I = 12 mag, and it was covered in great detail with almost 25 000 data points gathered by a network of telescopes. We present the photometric and spectroscopic follow-up covering 500 days of the event evolution. We employed a full Keplerian binary orbit microlensing model combined with the motion of Earth and Gaia around the Sun to reproduce the complex light curve. The photometric data allowed us to solve the microlensing event entirely and to derive the complete and unique set of orbital parameters of the binary lensing system. We also report on the detection of the first-ever microlensing space-parallax between the Earth and Gaia located at L2. The properties of the binary system were derived from microlensing parameters, and we found that the system is composed of two main-sequence stars with masses 0.57 ? 0.05 M☉ and 0.36 ? 0.03 M☉ at 780 pc, with an orbital period of 2.88 years and an eccentricity of 0.30. We also predict the astrometric microlensing signal for this binary lens as it will be seen by Gaia as well as the radial velocity curve for the binary system. Events such as Gaia16aye indicate the potential for the microlensing method of probing the mass function of dark objects, including black holes, in directions other than that of the Galactic bulge. This case also emphasises the importance of long-term time-domain coordinated observations that can be made with a network of heterogeneous telescopes.

Ключевые слова

гравитационное микролинзирование, фотометрические наблюдения, двойные звездные системы

Название журнала

ASTRONOMY & ASTROPHYSICS

URL

https://www.aanda.org/articles/aa/full_html/2020/01/aa35097-19/aa35097-19.html

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https://repository.kpfu.ru/?p_id=244721

Полная запись метаданных

Поле DC	Значение	Язык
dc.contributor.author	Бикмаев Ильфан Фяритович	ru_RU
dc.contributor.author	Гутаев Алексей Геннадьевич	ru_RU
dc.date.accessioned	2020-01-01T00:00:00Z	ru_RU
dc.date.available	2020-01-01T00:00:00Z	ru_RU
dc.date.issued	2020	ru_RU
dc.identifier.citation	Wyrzykowski L., Mroz P., Rybicki K. A., Full orbital solution for the binary system in the northern Galactic disc microlensing event Gaia16aye//ASTRONOMY & ASTROPHYSICS. - 2020. - Vol.633, Is.. - Art. №A98.	ru_RU
dc.identifier.uri	https://repository.kpfu.ru/?p_id=244721	ru_RU
dc.description.abstract	ASTRONOMY & ASTROPHYSICS	ru_RU
dc.description.abstract	Gaia16aye was a binary microlensing event discovered in the direction towards the northern Galactic disc and was one of the first microlensing events detected and alerted to by the Gaia space mission. Its light curve exhibited five distinct brightening episodes, reaching up to I = 12 mag, and it was covered in great detail with almost 25 000 data points gathered by a network of telescopes. We present the photometric and spectroscopic follow-up covering 500 days of the event evolution. We employed a full Keplerian binary orbit microlensing model combined with the motion of Earth and Gaia around the Sun to reproduce the complex light curve. The photometric data allowed us to solve the microlensing event entirely and to derive the complete and unique set of orbital parameters of the binary lensing system. We also report on the detection of the first-ever microlensing space-parallax between the Earth and Gaia located at L2. The properties of the binary system were derived from microlensing parameters, and we found that the system is composed of two main-sequence stars with masses 0.57 ? 0.05 M☉ and 0.36 ? 0.03 M☉ at 780 pc, with an orbital period of 2.88 years and an eccentricity of 0.30. We also predict the astrometric microlensing signal for this binary lens as it will be seen by Gaia as well as the radial velocity curve for the binary system. Events such as Gaia16aye indicate the potential for the microlensing method of probing the mass function of dark objects, including black holes, in directions other than that of the Galactic bulge. This case also emphasises the importance of long-term time-domain coordinated observations that can be made with a network of heterogeneous telescopes.	ru_RU
dc.language.iso	ru	ru_RU
dc.subject	гравитационное микролинзирование	ru_RU
dc.subject	фотометрические наблюдения	ru_RU
dc.subject	двойные звездные системы	ru_RU
dc.title	Full orbital solution for the binary system in the northern Galactic disc microlensing event Gaia16aye	ru_RU
dc.type	Статьи в зарубежных журналах и сборниках	ru_RU