Radial velocities of blue stragglers in M3

Details Radial velocities of blue stragglers in M3 Radial velocities of blue stragglers in M3

Nov 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983pasp...95..835c&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 95, Nov. 1983, p. 835-838.

Astronomy and Astrophysics

Astronomy

10

Blue Stars, Globular Clusters, Radial Velocity, Stellar Spectra, H Beta Line, High Resolution, Spectrographs

Scientific paper

The authors have obtained 1 Å resolution spectra of five blue stragglers in M3 all with mv ≥ 17.3 using the MMT spectrograph and photon-counting Reticon. The spectra cover the range 4580 Å to 5450 Å, and except for Hβ are devoid of strong features. From measurements of the Hβ lines in the five blue stragglers and three velocity standards the authors obtain v_sun; = -149±19 km sec-1 for the five blue stragglers. A comparison of this result with the M3 cluster velocity of -147 km sec-1 obtained by Gunn and Griffin from measurements of bright M3 giants provides evidence that these blue stragglers are indeed cluster members.

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