Astrometric study of the subdwarf HR 4550

Details Astrometric study of the subdwarf HR 4550 Astrometric study of the subdwarf HR 4550

Jul 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984pasp...96..557h&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 96, July 1984, p. 557, 558.

Astronomy and Astrophysics

Astronomy

13

Astrometry, Flare Stars, Stellar Motions, Subdwarf Stars, Orbit Calculation, Stellar Parallax

Scientific paper

Astrometric results for the high-velocity metal-poor G8 subdwarf HR 4550 show a parallax of 0.122 + or -0.004 arcsec. The radial velocity of -98.2 + or -0.2 km/s appears to be constant. The difficulty in obtaining an accurate determination of the secular acceleration of the proper motion is discussed. No evidence for orbital effects of the unconfirmed visual companion of HR 4550 is found in the observations.

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