The dwarf spheroidal galaxy in Draco. III - Proper motion membership probabilities

Details The dwarf spheroidal galaxy in Draco. III - Proper motion membership probabilities The dwarf spheroidal galaxy in Draco. III - Proper motion membership probabilities

Apr 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980aj.....85..387s&link_type=abstract

Astronomical Journal, vol. 85, Apr. 1980, p. 387-397.

Mathematics

Probability

30

Astrometry, Elliptical Galaxies, Stellar Motions, Astronomical Photography, Astronomical Photometry, Color-Magnitude Diagram, Probability Distribution Functions, Star Distribution

Scientific paper

PDS astrometry from photographic plates of the Draco dwarf galaxy is used to derive proper motion membership probabilities for stars measured in earlier photometric studies. It is found that removing probable foreground stars from the color-magnitude diagram of Draco tends to strengthen earlier conclusions about the structure of the giant and subgiant branches. The possible existence of an upper horizontal branch containing core helium-burning stars of more than one solar mass is still questionable. A reduced proper motion diagram for probable foreground stars is presented and discussed briefly.

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