2024ApJ...961L..45S

Query : 2024ApJ...961L..45S

2024ApJ...961L..45S - Astrophys. J., 961, L45 (2024/February-1)

The First TESS Self-lensing Pulses: Revisiting KIC 12254688.

SORABELLA N.M., LAYCOCK S.G.T., CHRISTODOULOU D.M. and BHATTACHARYA S.

Abstract (from CDS):

We report the observations of two self-lensing pulses from KIC 12254688 in Transiting Exoplanet Survey Satellite (TESS) light curves. This system, containing an F2V star and white-dwarf companion, was among the first self-lensing binary systems discovered by the Kepler Space Telescope over the past decade. Each observed pulse occurs when the white dwarf transits in front of its companion star, gravitationally lensing the star's surface, thus making it appear brighter to a distant observer. These two pulses are the very first self-lensing events discovered in TESS observations. We describe the methods by which the data were acquired and detrended, as well as the best-fit binary parameters deduced from our self-lensing+radial velocity model. We highlight the difficulties of finding new self-lensing systems with TESS, and we discuss the types of self-lensing systems that TESS may be more likely to discover in the future.

Journal keyword(s): Compact binary stars - Gravitational microlensing - White dwarf stars

Simbad objects: 1

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Number of rows : 1

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	KOI-2384	V*	19 17 29.7185278752	+50 56 03.626180268						F2V	16	0

Query : 2024ApJ...961L..45S

Basic data :

KOI-2384 -- Variable Star

* (2009yCat,KIC,...), V* (2019MNRAS), Lev (2018AJ), NIR (2MASS)

19 17 29.7185278752 +50 56 03.626180268 (Optical) [ 0.0180 0.0178 90 ] A 2020yCat.1350....0G

19 16 13.5217963641 +50 50 34.176853962 [ 0.0180 0.0178 90 ]

082.0622273388181 +16.8821402543051 [ 0.0180 0.0178 90 ]

1.691 -7.466 [0.022 0.023 90] A 2020yCat.1350....0G

V(km/s) -1.3 [15.9] / z(~) -0.000004 [0.000053] / cz -1.30 [15.90] (Opt) E 2016A&A...594A..39F

0.9363 [0.0186] A 2020yCat.1350....0G

F2V C 2016A&A...594A..39F

G 12.965253 [0.002775] C 2020yCat.1350....0G

J 12.180 [0.024] C 2003yCat.2246....0C

H 11.988 [0.031] C 2003yCat.2246....0C

K 11.944 [0.023] C 2003yCat.2246....0C

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`2MASS J19172971+5056036`	`KOI-2384`	`Gaia DR3 2133138010555585024`
`KIC 12254688`	`TIC 299218362`	`Gaia DR2 2133138010555585024`

References (16 between 1850 and 2026) (Total 16)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).

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2MASS J19172971+5056036 KIC 12254688 Gaia DR3 2133138010555585024 Gaia DR2 2133138010555585024

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