An unseen companion to 36 Ursae Majoris A from analysis of plates taken with the Sproul 61-CM refractor

Details An unseen companion to 36 Ursae Majoris A from analysis of plates taken with the Sproul 61-CM refractor An unseen companion to 36 Ursae Majoris A from analysis of plates taken with the Sproul 61-CM refractor

Oct 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983pasp...95..775l&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 95, Oct. 1983, p. 775-777.

Astronomy and Astrophysics

Astronomy

3

Astrometry, Eclipsing Binary Stars, Red Dwarf Stars, Stellar Spectrophotometry, Kepler Laws, Photographic Plates, Stellar Mass, Stellar Parallax

Scientific paper

Astrometric analysis of plates taken on 36 UMa A with the Sproul 61-cm refractor indicate variable proper motion which can be explained by Kepler motion for a photocentric orbit with a period of 18 years. An unseen red-dwarf companion is indicated with a mass of about 0.07 solar mass. This additional companion makes the 36 UMa system at least quadruple. The Sproul relative parallax of the system is + 0.0738 arscec + or - 0.0028 arcsec as determined by the A component.

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