2023RNAAS...7..103W

Query : 2023RNAAS...7..103W

2023RNAAS...7..103W - Research Notes of the AAS, 7, 103 (2023/May-0)

Hidden Companions to Intermediate-mass Stars. IV. Uncovering a 1.1 M⊙, 1.3 au Companion in the Astrometric Binary HIP 77541.

WAISBERG I., KLEIN Y. and KATZ B.

Abstract (from CDS):

There are many Hipparcos/Gaia astrometric binaries for which the nature of the companion is not known. Optical/near-infrared inteferometry is arguably the most efficient method to unambiguously identify such companions. Here we report on a VLTI/GRAVITY observation in which we detected a companion to the nearby astrometric binary HIP 77541 with a K band flux ratio of 20% at a projected separation ρ = 18 mas ↔ 1.3 au. The resulting isochrone masses 2.0 + 1.1M⊙ imply that HIP 77541 is a potential progenitor for a close white dwarf binary within a Hubble time.

Abstract Copyright: © 2023. 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 141194 * 15 49 57.4982446872 -48 54 44.656364520   5.904 5.837     A1V 29 0
2 HD 141743 * 15 52 43.9212791736 -48 49 42.586163796   10.055 8.995     K2III 12 0

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