Copernicus observations of interstellar matter toward the Orion OB1 association. I. epsilon and pi 5 Orionis.
Abstract
Copernicus UV data on interstellar lines toward Epsilon Ori and Pi-5 Ori are analyzed to study abundances and physical conditions in both low- and intermediate-velocity components. Clouds at -8 and +5 km/s (LSR) toward Epsilon Ori show typical depletions of Fe, Ti, Mg, and Si in dense (H number density about 100 per cu cm) gas. Low-column-density intermediate-velocity clouds toward both stars, with low densities (hydrogen number density less than 1 per cu cm) and near-cosmic Si abundances, are consistent with a widespread pattern of high-velocity gas over a 15-deg area surrounding the Orion region. Such activity may be attributed to the repeated action of supernovae in a patchy low-density region of interstellar gas.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- October 1979
- DOI:
- 10.1086/157379
- Bibcode:
- 1979ApJ...233..182S
- Keywords:
-
- Astronomical Spectroscopy;
- Interstellar Matter;
- Orion Nebula;
- Satellite Observation;
- Spaceborne Astronomy;
- Abundance;
- Gas Density;
- Oao 3;
- Spectral Line Width;
- Tables (Data);
- Astrophysics;
- Interstellar Lines:UV;
- Interstellar Matter:Element Abundances;
- Interstellar Matter:Stellar Associations