Authors:
Mugrauer, M; Neuhauser, R; Mazeh, T; Guenther, E; Fernandez, M
Journal:
ASTRONOMISCHE NACHRICHTEN
Abstract:
In our ongoing deep infrared imaging search for faint wide secondaries of planet-candidate host stars we have confirmed astrometrically the companionship of a low-mass object to be co-moving with HD 89744, a companion-candidate suggested already by Wilson et al. (2000). The derivation of the common proper motion of HD 89744 and its companion, which are separated by 62.996 +/- 0.035 arcsec, is based on about 5 year epoch difference between 2MASS and our own UKIRT/UFTI images. The companion effective temperature is about 2200 K and its mass is in the range between 0.072 and 0.081 M-circle dot, depending on the evolutionary model. Therefore, HD 89744 B is either a very low mass stellar or a heavy brown dwarf companion.
URL:
https://ui.adsabs.harvard.edu/#abs/2004AN....325..718M/abstract
Keywords:
stars : low-mass; brown dwarf; stars : individual (HD 89744)