2020A&A...633A..98W


Query : 2020A&A...633A..98W

2020A&A...633A..98W - Astronomy and Astrophysics, volume 633A, 98-98 (2020/1-1)

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

WYRZYKOWSKI L., MROZ P., RYBICKI K.A., GROMADZKI M., KOLACZKOWSKI Z., ZIELINSKI M., ZIELINSKI 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., BAKIS 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., CEPAS V., CROPPER M., CHRUSLINSKA 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., JELINEK M., JENSEN E., KACZMAREK Z., KATZ D., KHAMITOV I.M., KILIC Y., KLENCKI J., KOLB U., KOPACKI G., KOUPRIANOV V.V., KRUSZYNSKA 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., MASKOLIUNAS M., MAUND J.R., MEINTJES P.J., MELNIKOV S.S., MENT K., MIKOLAJCZYK P., MORRELL M., MOWLAVI N., MOZDZIERSKI D., MURPHY D., NAZAROV S., NETZEL H., NESCI R., NGEOW C.-C., NORTON A.J., OFEK E.O., PAKSTIENE 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., SNIEGOWSKA M., SNODGRASS C., SOARES P.S., VAN SOELEN B., SPETSIERI Z.T., STANKEVICIUTE 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.Y., ZHUKOV D.G., ZDANAVICIUS J., ZOLA S. and ZUBAREVA A.

Abstract (from CDS):

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=12mag, and it was covered in great detail with almost 25000 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±0.05M and 0.36±0.03M at 780pc, 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.

Abstract Copyright: © ESO 2020

Journal keyword(s): gravitational lensing: micro - techniques: photometric - binaries: general - stars: individual: Gaia16aye-L

VizieR on-line data: <Available at CDS (J/A+A/633/A98): model.dat followup.dat gaia.dat>

Simbad objects: 8

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Number of rows : 8
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 TYC 3656-1328-1 * 00 09 21.9858026376 +54 39 43.919404164   11.47 11.37     A 22 1
2 TCP J05074264+2447555 * 05 07 42.7246306560 +24 47 56.378307624   14.99 14.09 13.97   ~ 18 0
3 EWS 2011-BLG-417 Lev 17 34 33.12 -27 06 39.3           ~ 14 0
4 MOA 2009-BLG-11 Lev 18 04 20.960 -29 31 08.96           ~ 9 0
5 MOA 2011-BLG-90 * 18 10 29.850 -26 38 43.03           ~ 9 0
6 EROS2-GSA 14 Lev 18 33 45.3 -12 52 04     18.9   16.7 ~ 2 0
7 UCAC4 601-089725 ** 19 40 01.1354321448 +30 07 53.453174124       15.69   K5 16 1
8 NAME Galactic Bulge reg ~ ~           ~ 3930 0

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2022.10.02-00:05:56

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