The Open UniversitySkip to content
 

Full orbital solution for the binary system in the northern Galactic disc microlensing event Gaia16aye

Wyrzykowski, Ł.; Mróz, P.; Rybicki, K. A.; Gromadzki, M.; Kołaczkowski, Z.; Zieliński, M.; Zieliński, P.; Britavskiy, N.; Gomboc, A.; Sokolovsky, K.; Hodgkin, S. T.; Abe, L.; Aldi, G. F.; AlMannaei, A.; Altavilla, G.; Al Qasim, A.; Anupama, G. C.; Awiphan, S.; Bachelet, E.; Bakış, V.; Baker, S.; Bartlett, S.; Bendjoya, P.; Benson, K.; Bikmaev, I. F.; Birenbaum, G.; Blagorodnova, N.; Blanco-Cuaresma, S.; Boeva, S.; Bonanos, A. Z.; Bozza, V.; Bramich, D. M.; Bruni, I.; Burenin, R. A.; Burgaz, U.; Butterley, T.; Caines, H. E.; Caton, D. B.; Calchi Novati, S.; Carrasco, J. M.; Cassan, A.; Čepas, V.; Cropper, M.; Chruślińska, M.; Clementini, G.; Clerici, A.; Conti, D.; Conti, M.; Cross, S.; Cusano, F.; Damljanovic, G.; Dapergolas, A.; D’Ago, G.; de Bruijne, J. H. J.; Dennefeld, M.; Dhillon, V. S.; Dominik, M.; Dziedzic, J.; Erece, O.; Eselevich, M. V.; Esenoglu, H.; Eyer, L.; Figuera Jaimes, R.; Fossey, S. J.; Galeev, A. I.; Grebenev, S. A.; Gupta, A. C.; Gutaev, A. G.; Hallakoun, N.; Hamanowicz, A.; Han, C.; Handzlik, B.; Haislip, J. B.; Hanlon, L.; Hardy, L. K.; Harrison, D. L.; van Heerden, H. J.; Hoette, V. L.; Horne, K.; Hudec, R.; Hundertmark, M.; Ihanec, N.; Irtuganov, E. N.; Itoh, R.; Iwanek, P.; Jovanovic, M. D.; Janulis, R.; Jelínek, M.; Jensen, E.; Kaczmarek, Z.; Katz, D.; Khamitov, I. M.; Kilic, Y.; Klencki, J.; Kolb, U.; Kopacki, G.; Kouprianov, V. V.; Kruszyńska, K.; Kurowski, S.; Latev, G.; Lee, C.-H.; Leonini, S.; Leto, G.; Lewis, F.; Li, Z.; Liakos, A.; Littlefair, S. P.; Lu, J.; Manser, C. J.; Mao, S.; Maoz, D.; Martin-Carrillo, A.; Marais, J. P.; Maskoliūnas, M.; Maund, J. R.; Meintjes, P. J.; Melnikov, S. S.; Ment, K.; Mikołajczyk, P.; Morrell, M.; Mowlavi, N.; Moździerski, D.; Murphy, D.; Nazarov, S.; Netzel, H.; Nesci, R.; Ngeow, C.-C.; Norton, A. J.; Ofek, E. O.; Pakštienė, E.; Palaversa, L.; Pandey, A.; Paraskeva, E.; Pawlak, M.; Penny, M. T.; Penprase, B. E.; Piascik, A.; Prieto, J. L.; Qvam, J. K. T.; Ranc, C.; Rebassa-Mansergas, A.; Reichart, D. E.; Reig, P.; Rhodes, L.; Rivet, J.-P.; Rixon, G.; Roberts, D.; Rosi, P.; Russell, D. M.; Zanmar Sanchez, R.; Scarpetta, G.; Seabroke, G.; Shappee, B. J.; Schmidt, R.; Shvartzvald, Y.; Sitek, M.; Skowron, J.; Śniegowska, M.; Snodgrass, C.; Soares, P. S.; van Soelen, B.; Spetsieri, Z. T.; Stankevičiūtė, A.; Steele, I. A.; Street, R. A.; Strobl, J.; Strubble, E.; Szegedi, H.; Tinjaca Ramirez, L. M.; Tomasella, L.; Tsapras, Y.; Vernet, D.; Villanueva, S.; Vince, O.; Wambsganss, J.; van der Westhuizen, I. P.; Wiersema, K.; Wium, D.; Wilson, R. W.; Yoldas, A.; Zhuchkov, R. Ya.; Zhukov, D. G.; Zdanavičius, J.; Zoła, S. and Zubareva, A. (2020). Full orbital solution for the binary system in the northern Galactic disc microlensing event Gaia16aye. Astronomy & Astrophysics, 633, article no. A98.

Full text available as:
[img]
Preview
PDF (Version of Record) - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader
Download (8MB) | Preview
DOI (Digital Object Identifier) Link: https://doi.org/10.1051/0004-6361/201935097
Google Scholar: Look up in Google Scholar

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.

Item Type: Journal Item
Copyright Holders: 2020 ESO
ISSN: 0004-6361
Keywords: gravitational lensing: micro; techniques: photometric; binaries: general; stars: individual: Gaia16aye-L
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Physical Sciences
Faculty of Science, Technology, Engineering and Mathematics (STEM)
Research Group: Astronomy
Item ID: 69147
Depositing User: Andrew Norton
Date Deposited: 24 Jan 2020 09:29
Last Modified: 15 Jun 2020 08:37
URI: http://oro.open.ac.uk/id/eprint/69147
Share this page:

Metrics

Altmetrics from Altmetric

Citations from Dimensions

Download history for this item

These details should be considered as only a guide to the number of downloads performed manually. Algorithmic methods have been applied in an attempt to remove automated downloads from the displayed statistics but no guarantee can be made as to the accuracy of the figures.

Actions (login may be required)

Policies | Disclaimer

© The Open University   contact the OU