Long baseline interferometric observations of HD 195019: no K dwarf companion detected

Details Long baseline interferometric observations of HD 195019: no K dwarf companion detected Long baseline interferometric observations of HD 195019: no K dwarf companion detected

Dec 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aas...201.4613k&link_type=abstract

American Astronomical Society, 201st AAS Meeting, #46.13; Bulletin of the American Astronomical Society, Vol. 34, p.1177

Astronomy and Astrophysics

Astronomy

Scientific paper

Radial velocity measurements of the G3 V/IV star HD 195019 revealed the presence of an orbiting companion with m sin i = 3.5 Jupiter masses and a period of 18 days (Fischer et al. 1999). A subsequent search for astrometric wobble using Hipparcos data suggested that the companion may be a K dwarf star with a mass of 0.7 Msun in a nearly pole-on orbit (Han et al. 2001). Here we present new visibility measurements obtained at the Palomar Testbed Interferometer which rule, out at the 99% confidence level, any companion in an orbit consistent with the spectroscopic data and having more than 2% of the flux of the primary star in the near-infrared K band. This upper flux limit corresponds to an upper mass limit of 0.35 Msun for the companion.

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