Copernicus observations of interstellar matter toward the Orion OB1 association. I - Epsilon and Pi-5 Orionis

Details Copernicus observations of interstellar matter toward the Orion OB1 association. I - Epsilon and Pi-5 Orionis Copernicus observations of interstellar matter toward the Orion OB1 association. I - Epsilon and Pi-5 Orionis

Oct 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979apj...233..182s&link_type=abstract

Astrophysical Journal, Part 1, vol. 233, Oct. 1, 1979, p. 182-187.

Astronomy and Astrophysics

Astronomy

18

Astronomical Spectroscopy, Interstellar Matter, Orion Nebula, Satellite Observation, Spaceborne Astronomy, Abundance, Gas Density, Oao 3, Spectral Line Width, Tables (Data)

Scientific paper

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.

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