2024RNAAS...8..206W

Query : 2024RNAAS...8..206W

2024RNAAS...8..206W - Research Notes of the AAS, 8, 206 (2024/August-0)

Hidden Companions to Intermediate-mass Stars. XXII. Inferring a 0.43M⊙, 1.65 au Companion in the Astrometric Binary within the Triple System Lambda Muscae.

WAISBERG I., KLEIN Y. and KATZ B.

Abstract (from CDS):

Lambda Muscae is a nearby A-type star reported as a P = 474 days astrometric binary in Gaia DR3 (and previously in Hipparcos) and which also has a 0.16M⊙ M dwarf companion at a projected separation 6.4 au discovered by VLT/SPHERE. Based on a K band flux ratio upper limit of 1% from a VLTI/GRAVITY interferometric observation, we estimate a primary mass MAa = 2.28M⊙ and infer that the closer companion is a MAb = 0.43M⊙ star (almost certainly an M dwarf) orbiting at a = 1.65 au. The triple system might be dynamically interesting given the low hierarchy and the ratio of angular momenta of the inner and outer orbits of about one.

Abstract Copyright: © 2024. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Multiple stars - A stars - Astrometric binary stars - Optical interferometry

Simbad objects: 2

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Number of rows : 2
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 101162 PM* 11 37 48.3782342832 -67 37 13.364056560   6.954 5.929     K0III 31 0
2 * lam Mus PM* 11 45 36.4146900112 -66 43 43.527733437 3.96 3.81 3.65 3.51 3.43 A7V 95 0

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