Astrometric and infrared speckle analysis of the visually unresolved binary BD+41.328 deg

Details Astrometric and infrared speckle analysis of the visually unresolved binary BD+41.328 deg Astrometric and infrared speckle analysis of the visually unresolved binary BD+41.328 deg

Apr 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983pasp...95..271l&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 95, April 1983, p. 271-274.

Astronomy and Astrophysics

Astronomy

10

Astrometry, Binary Stars, Infrared Astronomy, Interferometry, Speckle Patterns, Stellar Mass, Companion Stars, Dwarf Stars, Infrared Interferometers, Stellar Parallax

Scientific paper

BD +41°328 (PCC 372), a solar-type 5th magnitude star at a distance of 14 parsecs was discovered to have an unseen companion from proper-motion analysis of astrometric plates taken with the Sproul 61-cm refractor, thus excluding it as a candidate for a solar planetary-type system. The combination of an improved photocentric orbit from recent astrometry and measurement of the companion's separation and brightness by infrared speckle interferometry at 2.2 microns indicates that the companion is a red dwarf with a mass of 0.38 ± 0.07Msun. It revolves around the primary with a period of 19.5 years and a semimajor axis of 8.9 ± 0.5 AU.

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