Use of high resolution IUE spectra of MG 2 in cool stars to probe the local interstellar medium

Details Use of high resolution IUE spectra of MG 2 in cool stars to probe the local interstellar medium Use of high resolution IUE spectra of MG 2 in cool stars to probe the local interstellar medium

Jul 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984esasp.218..139m&link_type=abstract

In ESA Fourth European IUE Conf. p 139-143 (SEE N84-35135 24-88)

Physics

3

Cool Stars, Interstellar Space, Iue, Late Stars, Magnesium, Stellar Spectra, Ultraviolet Spectra, Absorption Spectra, Chromosphere, F Stars, Radial Velocity

Scientific paper

It is shown that, given suitable radial velocity values for the stars and the local interstellar medium (LISM) interstellar absorption can be distinguished from chromospheric self absorption within the MgII emissions from late type stars. Beta Hyi (G2IV) offers a clear example. Zeta Tuc (G2V) and delta Pav (G8V) which are very close to beta Hyi show similar narrow MgII absorption features, which are also interpretable as interstellar. Narrow MgII absorptions in the rapidly rotating F-type stars beta TrA and alpha Hyi are reported. The absence of IS Mg II in the stars tau Cet and 24UMa confirms the presence of a hole in the LISM near galactic longitude 150 deg.

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