Abstract
view Abstract Citations (26) References (19) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS High-velocity gas in supernova remnants. III. The Monoceros Loop. Wallerstein, G. ; Jacobsen, T. S. Abstract The paper reports on observations of interstellar absorption lines in the spectra of 25 stars near the Monoceros Loop. An absorption feature with a velocity of +69 km/s (with respect to the local standard of rest) is found in the spectrum of HD 47240, and an absorption feature with a velocity of -31 km/s is found in the spectrum of HD 47359. These features are attributed to high-velocity clouds accelerated by the supernova explosion that produced the Loop. Three low-velocity Ca II features are observed throughout the region. A mean expansion velocity of 50 km/s is derived for the Loop and shown to be in excellent agreement with that obtained previously from H-alpha interferograms. The data are compared with those for other supernova remnants, and it is found that the Monoceros Loop appears to be an extension of the age sequence extending from Vela XYZ through the Cygnus Loop and Shajn 147. It is concluded that the age of the Monoceros Loop is greater than 150,000 years. Publication: The Astrophysical Journal Pub Date: July 1976 DOI: 10.1086/154466 Bibcode: 1976ApJ...207...53W Keywords: Absorption Spectra; H Alpha Line; Interstellar Gas; Supernova Remnants; Gas Expansion; Interferometry; Nebulae; Stellar Evolution; Astrophysics full text sources ADS | data products SIMBAD (26) Related Materials (2) Part 1: 1971ApJ...170..289W Part 2: 1973ApJ...181..799S
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