High Resolution, Absolute Flux Profiles of the MG II H and K Lines in Main Sequence Stars of Spectral Types F to K

Details High Resolution, Absolute Flux Profiles of the MG II H and K Lines in Main Sequence Stars of Spectral Types F to K High Resolution, Absolute Flux Profiles of the MG II H and K Lines in Main Sequence Stars of Spectral Types F to K

May 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994aas...184.0502m&link_type=abstract

American Astronomical Society, 184th AAS Meeting, #05.02; Bulletin of the American Astronomical Society, Vol. 26, p.863

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Scientific paper

We present high-resolution IUE spectra of the emission cores of the Mg II resonance doublet at 2800 in a selection of all F, G and K main sequence stars available in the IUE archive. We discuss the qualitative line profile groupings. We also derive chromospheric radiative losses in the h and k lines, and discuss these loss rates as functions of effective temperature. Chromospheric velocity fields and indicators of circumstellar envelopes are discussed in terms of profile asymmetries and other diagnostics. Finally, we discuss the relationship between the h and k line widths and absolute magnitude.

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