The distribution of interstellar matter toward Tycho's supernova remnant and its relation to distance estimates

Abstract

view Abstract Citations (13) References (41) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The distribution of interstellar matter toward Tycho's supernova remnant and its relation to distance estimates. Black, J. H. ; Raymond, J. C. Abstract Observations of interstellar absorption lines in the spectra of five stars in the direction of Tycho's Supernova Remnant are presented. The profiles show significant absorption at large negative velocities, - 50 to - 60 km/s (LSR). This information, together with the distances of the background stars, permits limiting distances to be assigned to the corresponding velocity components in the H I 21-cm line absorption spectrum of the supernova remnant itself. The 21-cm absorption line data for Tycho's Supernova Remnant are entirely consistent with a distance as small as 2 kpc. Distances based upon simple kinematic models of galactic rotation can be confused by well-known noncircular motions in this direction. The interstellar line data also reveal a relatively high column density of CO toward HD 108. Publication: The Astronomical Journal Pub Date: March 1984 DOI: 10.1086/113529 Bibcode: 1984AJ.....89..411B Keywords: Distance; Interstellar Matter; Stellar Spectra; Supernova Remnants; Absorption Spectra; Centimeter Waves; Gas Density; Interstellar Extinction; Line Spectra; Astrophysics full text sources ADS | data products SIMBAD (6)