Interstellar lines in the spectra of four stars.
Abstract
Observations of optical interstellar absorption lines arising from Na I, K I, and/or Ca II are reported in the spectra of HD 72127, Iota(1) Sco, 102 Her, and 6 Cas. Line components showing strikingly large Ca II/Na I ratios are found toward HD 72127 and are verified for 102 Her. The absorption toward Iota(1) Sco and 6 Cas illustrates features of the local galactic distribution of interstellar gas.
- Publication:
-
Publications of the Astronomical Society of the Pacific
- Pub Date:
- October 1979
- DOI:
- 10.1086/130570
- Bibcode:
- 1979PASP...91..690H
- Keywords:
-
- Absorption Spectra;
- Binary Stars;
- Interstellar Gas;
- Line Spectra;
- Stellar Spectra;
- Supergiant Stars;
- Calcium;
- D Lines;
- Early Stars;
- Gas Density;
- Interstellar Extinction;
- K Lines;
- Spectrum Analysis;
- Astronomy;
- Interstellar Lines:Stellar Spectra