2026ApJ...997....3S

Query : 2026ApJ...997....3S

2026ApJ...997....3S - Astrophys. J., 997, 3 (2026/January-3)

An Anomalous Symmetric Flare Observed in the Single-lined Spectroscopic Binary TIC 380907942: Assessing Self-lensing and Alternative Hypotheses.

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

Abstract (from CDS):

We report the observation of an anomalous flare in the Transiting Exoplanet Survey Satellite light curve of TIC 380907942 (HD 10443), a known single-lined spectroscopic binary. Archived spectra suggest this binary contains a G0IV star and an unresolved companion with an orbital period of ∼11 yr. We investigate a variety of hypotheses for the observed light-curve feature, including the possibility that TIC 380907942 is a self-lensing binary in which a compact object gravitationally lenses its stellar companion. We rule out the typical sources of self-lensing false positives, perform a joint fit to the system's light curve and radial velocity data, and discuss future observations needed to confirm the viability of the self-lensing hypothesis. We evaluate the few alternative theories that cannot be excluded at present, including line-of-sight coincidences such as background dwarf novae or active galactic nucleus, and estimate their relative likelihood. If truly a self-lensing binary, TIC 380907942 would possess, by far, the longest orbital period yet observed for such a system.

Abstract Copyright: © 2026. The Author(s). Published by the American Astronomical Society.

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 HD 10443 SB* 01 41 56.1895530168 +01 54 09.418675356   9.45   8.6   G0IV/V 37 0

Query : 2026ApJ...997....3S

Basic data :
HD 10443 -- Spectroscopic Binary
Other object types: otypes_help 		* (HD,AG,...), PM* (2018yCat,G,...), ** (BDS,CCDM,...), SB* (2004A&A,SBC9), NIR (2MASS)
ICRS coord. (ep=J2000) : 		01 41 56.1895530168 +01 54 09.418675356 (Optical) [ 0.0498 0.0374 90 ] A 2020yCat.1350....0G
FK4 coord. (ep=B1950 eq=1950) : 		01 39 22.0386328935 +01 39 10.672198365 [ 0.0498 0.0374 90 ]
Gal coord. (ep=J2000) : 		147.6624462735234 -58.5233315897502 [ 0.0498 0.0374 90 ]
Proper motions mas/yr : 		-145.446 -168.286 [0.060 0.041 90] A 2020yCat.1350....0G
Radial velocity / Redshift / cz : 		V(km/s) -75.48 [0.48] / z(~) -0.000252 [0.000002] / cz -75.47 [0.48]
   A 2002AJ....124.1144L
Parallaxes (mas): 		13.862 [0.0549] A 2020yCat.1350....0G
Spectral type: 		G0IV/V D 1999MSS...C05....0H
Fluxes (6) :
B 9.45 [~] E ~
R 8.6 [~] E 2003AJ....125..984M
G 8.767010 [0.002762] C 2020yCat.1350....0G
J 7.867 [0.027] C 2003yCat.2246....0C
H 7.597 [0.026] C 2003yCat.2246....0C
K 7.569 [0.036] C 2003yCat.2246....0C
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Identifiers (34) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

HD 10443 G 71-27 PPM 144896 YZC 20 481
AG+01 184 GSC 00029-00257 SAO 110075 YZ 0 2743
ASCC 1096476 HIC 7929 SBC9 2309 YZ 1 337
BD+01 305 HIP 7929 TIC 380907942 [SMM2006] SPG 231
BDS 876 A IDS 01368+0124 A TYC 29-257-1 Gaia DR2 2510677391199286784
CCDM J01419+0154A LSPM J0141+0154 UBV M 8369 Gaia DR3 2510677391199286784
CSI+01 305 1 LTT 17251 UCAC2 32305702 Gaia DR1 2510677386903825792
GEN# +1.00010443 2MASS J01415618+0154090 USNO-B1.0 0919-00017612
G 271-132 NLTT 5664 WDS J01419+0154A

References (37 between 1850 and 2026) (Total 37)
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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Collections of Measurements Description of Measurements

Velocities : 3    Distance : 2    Rot : 1    Plx : 5    PM : 5    SpT : 2   

   

External archives :

Link by name to the catalogue in VizieR :

HD 10443 AG+01 184 BD+01 305 CCDM J01419+0154A G 271-132
G 71-27 GSC 00029-00257 HIC 7929 HIP 7929 LSPM J0141+0154
2MASS J01415618+0154090 NLTT 5664 PPM 144896 SAO 110075 TYC 29-257-1
UCAC2 32305702 USNO-B1.0 0919-00017612 WDS J01419+0154A YZC 20 481 Gaia DR2 2510677391199286784
Gaia DR3 2510677391199286784 Gaia DR1 2510677386903825792

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