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.; Zubareva, A.

doi:10.1051/0004-6361/201935097

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.; H...

Authors

Ł Wyrzykowski

P. Mróz

K.A. Rybicki

M. Gromadzki

Z. Kołaczkowski

M. Zieliński

P. Zieliński

N. Britavskiy

A. Gomboc

K. Sokolovsky

S.T. Hodgkin

L. Abe

G.F. Aldi

A. AlMannaei

G. Altavilla

A. Al Qasim

G.C. Anupama

S. Awiphan

E. Bachelet

V. Bakış

S. Baker

S. Bartlett

P. Bendjoya

K. Benson

I.F. Bikmaev

G. Birenbaum

N. Blagorodnova

S. Blanco-Cuaresma

S. Boeva

A.Z. Bonanos

V. Bozza

D.M. Bramich

I. Bruni

R.A. Burenin

U. Burgaz

Timothy Butterley timothy.butterley@durham.ac.uk
Post Doctoral Research Associate

H.E. Caines

D.B. Caton

S. Calchi Novati

J.M. Carrasco

A. Cassan

V. Čepas

M. Cropper

M. Chruślińska

G. Clementini

A. Clerici

D. Conti

M. Conti

S. Cross

F. Cusano

G. Damljanovic

A. Dapergolas

G. D’Ago

J.H.J. de Bruijne

M. Dennefeld

V.S. Dhillon

M. Dominik

J. Dziedzic

O. Erece

M.V. Eselevich

H. Esenoglu

L. Eyer

R. Figuera Jaimes

S.J. Fossey

A.I. Galeev

S.A. Grebenev

A.C. Gupta

A.G. Gutaev

N. Hallakoun

A. Hamanowicz

C. Han

B. Handzlik

J.B. Haislip

L. Hanlon

L.K. Hardy

D.L. Harrison

H.J. van Heerden

V.L. Hoette

K. Horne

R. Hudec

M. Hundertmark

N. Ihanec

E.N. Irtuganov

R. Itoh

P. Iwanek

M.D. Jovanovic

R. Janulis

M. Jelínek

E. Jensen

Z. Kaczmarek

D. Katz

I.M. Khamitov

Y. Kilic

J. Klencki

U. Kolb

G. Kopacki

V.V. Kouprianov

K. Kruszyńska

S. Kurowski

G. Latev

C.-H. Lee

S. Leonini

G. Leto

F. Lewis

Z. Li

A. Liakos

S.P. Littlefair

J. Lu

C.J. Manser

S. Mao

D. Maoz

A. Martin-Carrillo

J.P. Marais

M. Maskoliūnas

J.R. Maund

P.J. Meintjes

S.S. Melnikov

K. Ment

P. Mikołajczyk

M. Morrell

N. Mowlavi

D. Moździerski

D. Murphy

S. Nazarov

H. Netzel

R. Nesci

C.-C. Ngeow

A.J. Norton

E.O. Ofek

E. Pakštienė

L. Palaversa

A. Pandey

E. Paraskeva

M. Pawlak

M.T. Penny

B.E. Penprase

A. Piascik

J.L. Prieto

J.K.T. Qvam

C. Ranc

A. Rebassa-Mansergas

D.E. Reichart

P. Reig

L. Rhodes

J.-P. Rivet

G. Rixon

D. Roberts

P. Rosi

D.M. Russell

R. Zanmar Sanchez

G. Scarpetta

G. Seabroke

B.J. Shappee

R. Schmidt

Y. Shvartzvald

M. Sitek

J. Skowron

M. Śniegowska

C. Snodgrass

P.S. Soares

B. van Soelen

Z.T. Spetsieri

A. Stankevičiūtė

I.A. Steele

R.A. Street

J. Strobl

E. Strubble

H. Szegedi

L.M. Tinjaca Ramirez

L. Tomasella

Y. Tsapras

D. Vernet

S. Villanueva

O. Vince

J. Wambsganss

I.P. van der Westhuizen

K. Wiersema

D. Wium

R.W. Wilson

A. Yoldas

R. Ya Zhuchkov

D.G. Zhukov

J. Zdanavičius

S. Zoła

A. Zubareva

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.

Citation

Wyrzykowski, Ł., Mróz, P., Rybicki, K., Gromadzki, M., Kołaczkowski, Z., Zieliński, M., …Zubareva, A. (2020). Full orbital solution for the binary system in the northern Galactic disc microlensing event Gaia16aye. Astronomy & Astrophysics, 633, Article A98. https://doi.org/10.1051/0004-6361/201935097

Journal Article Type	Article
Acceptance Date	Oct 10, 2019
Online Publication Date	Jan 21, 2020
Publication Date	Jan 21, 2020
Deposit Date	Feb 13, 2020
Publicly Available Date	Feb 14, 2020
Journal	Astronomy and astrophysics.
Print ISSN	0004-6361
Electronic ISSN	1432-0746
Publisher	EDP Sciences
Peer Reviewed	Peer Reviewed
Volume	633
Article Number	A98
DOI	https://doi.org/10.1051/0004-6361/201935097

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Copyright Statement
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. & Zubareva, A. (2020). Full orbital solution for the binary system in the northern Galactic disc microlensing event Gaia16aye. Astronomy & Astrophysics 633: A98. Reproduced with permission, © ESO.