2025A&A...697A..57B

Query : 2025A&A...697A..57B

2025A&A...697A..57B - Astronomy and Astrophysics, volume 697A57 (2025/5-1)

AT2021uey: A planetary microlensing event outside the Galactic bulge.

BAN M., VOLOSHYN P., ADOMAVICIENE R., BACHELET E., BOZZA V., BRINCAT S.M., BRUNI I., BURGAZ U., CARRASCO J.M., CASSAN A., CEPAS V., CUSANO F., DENNEFELD M., DOMINIK M., DUBOIS F., FIGUERA JAIMES R., FUKUI A., GALDIES C., GAROFALO A., HUNDERTMARK M., ILYIN I., KRUSZYNSKA K., KULIJANISHVILI V., KVERNADZE T., LOGIE L., MASKOLIUNAS M., MIKOLAJCZYK P.J., MROZ P., NARITA N., PAKSTIENE E., PELOTON J., POLESKI R., QVAM J.K.T., RAU S., ROTA P., RYBICKI K.A., STREET R.A., TSAPRAS Y., VANAVERBEKE S., WAMBSGANSS J., WYRZYKOWSKI L., ZDANAVICIUS J., ZEJMO M., ZIELINSKI P. and ZOLA S.

Abstract (from CDS):

We report the analysis of a planetary microlensing event AT2021uey. The event was observed outside the Galactic bulge and alerted both space-(Gaia) and ground-based (ZTF and ASAS-SN) surveys. From the observed data, we find that the lens system is located at a distance of ∼1 kpc and comprises an M-dwarf host star of about half a solar mass, orbited by a Jupiter-like planet beyond the snowline. The source star could be a metal-poor giant located in the halo according to the spectral analyses and modelling. Hence, AT2021uey is a unique example of the binary-lens event outside the bulge that is offered by a disc-halo lens-source combination.

Abstract Copyright: © The Authors 2025

Journal keyword(s): gravitational lensing: micro - methods: observational - techniques: photometric - techniques: spectroscopic - planets and satellites: detection

Simbad objects: 6

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Number of rows : 6
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 7988 0
2 NAME TCP J05074264+2447555 b Pl 05 07 42.7246306560 +24 47 56.378307624           ~ 5 0
3 TCP J05074264+2447555 * 05 07 42.7246306560 +24 47 56.378307624   14.99 14.09 13.97   F5 32 0
4 AT 2022rmc * 10 07 04.560 -66 10 51.20           ~ 3 0
5 UCAC4 583-124062 * 21 38 10.8289030225 +26 27 59.779148447       15.438   ~ 2 0
6 NAME Galactic Bulge reg ~ ~           ~ 4794 0

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