Detection of mass loss in stellar chromospheres

Details Detection of mass loss in stellar chromospheres Detection of mass loss in stellar chromospheres

May 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apj...238..221s&link_type=abstract

Astrophysical Journal, Part 1, vol. 238, May 15, 1980, p. 221-228.

Astronomy and Astrophysics

Astrophysics

84

Chromosphere, Emission Spectra, Giant Stars, Late Stars, Stellar Mass Ejection, Ultraviolet Spectra, Asymmetry, High Resolution, Iue, Line Spectra, Stellar Evolution, Stellar Magnitude

Scientific paper

IUE observations of 47 cool giants have been made in a search for the onset of expansion in the Mg II h and k emission cores. It is found that, in a statistical sense, the longward emission peak becomes dominant above a velocity dividing line in the H-R diagram, which lies close to a temperature dividing line reported by Linsky and Haisch (1979). Also discussed are asymmetries in emission cores, collected asymmetry data including the evaluation of absolute visual magnitude by MK classification, Ca K emission width, and Mg k emission width, and evolutionary implications for the hypothesized supersonic transition locus (Mullan, 1978).

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