Other
Scientific paper
Sep 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978mnras.184p..55m&link_type=abstract
Monthly Notices of the Royal Astronomical Society, vol. 184, Sept. 1978, p. 55P-59P.
Other
26
Emission Spectra, Globular Clusters, H Alpha Line, Red Giant Stars, Stellar Mass Ejection, Stellar Spectra, Escape Velocity, Southern Hemisphere, Stellar Envelopes
Scientific paper
H-alpha profiles in AAT/IPCS spectra of 15 red giants in five southern globular clusters and of a metal-poor field star have been examined for emission components suggestive of mass loss. Such components are present in the field star (HD 165195) and in seven stars near the tips of the red-giant branches of Omega Cen, M22 and NGC 6752, but absent in the brightest members of NGC 6397. Using similar assumptions to those of Cohen (1976), mass-loss rates of up to 6 hundred-millionths of a solar mass per yr are derived, but with large variations among otherwise similar stars. The observations are, however, compatible with all stars losing mass at about one-third or more of the rate predicted by Reimers' (1975) empirical formula and with the mass-loss requirements suggested by cluster horizontal-branch morphology. The ejection speeds seem adequate to enable most of the gas to escape from the clusters.
Mallia E. A.
Pagel Bernard E. J.
No associations
LandOfFree
Further evidence of mass loss from globular cluster stars does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Further evidence of mass loss from globular cluster stars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Further evidence of mass loss from globular cluster stars will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-942645