HD 27507 - A star escaping from our galaxy

Details HD 27507 - A star escaping from our galaxy HD 27507 - A star escaping from our galaxy

Aug 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978pasp...90..451p&link_type=abstract

Astronomical Society of the Pacific, Publications, vol. 90, Aug.-Sept. 1978, p. 451, 452.

Astronomy and Astrophysics

Astronomy

6

Radial Velocity, Stellar Motions, Stellar Spectrophotometry, Color, Escape Velocity

Scientific paper

HD 27507 is a horizontal-branch star with a radial velocity of 348 km/s. Its galactocentric velocity (368 km/s) is very little affected by a possible error in the adopted circular velocity in the vicinity of the sun. Since it is very unlikely that a star with a galactocentric velocity within 10 km/s of the escape velocity is found, it can be concluded that the escape velocity is at least 378 + or - 20 km/s. The redetermination of the proper motion of HD 27507 can substantially reduce the margin of uncertainty.

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