Distribution of interstellar matter toward Tycho's Supernova Remnant and its relation to distance estimates

Journal Article · Thu Mar 01 04:00:00 EST 1984 · Astron. J.; (United States)

DOI:https://doi.org/10.1086/113529· OSTI ID:5019700

Black, J H; Raymond, J C

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/sup -1/ (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.

• Research Organization: Steward Observatory, University of Arizona, Tucson, Arizona 85721 and Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, Massachusetts 02138
• OSTI ID: 5019700
• Journal Information: Astron. J.; (United States), Journal Name: Astron. J.; (United States) Vol. 89:3; ISSN ANJOA
• Country of Publication: United States
• Language: English

Related Subjects

640105* -- Astrophysics & Cosmology-- Galaxies
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ABSORPTION SPECTRA
ABUNDANCE
ALKALI METALS
CALCIUM IONS
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CHALCOGENIDES
CHARGED PARTICLES
CHEMISTRY
COSMIC GASES
COSMIC RADIO SOURCES
COSMOCHEMISTRY
DISTANCE
ELECTROMAGNETIC RADIATION
ELEMENTS
FLUIDS
GASES
H1 REGIONS
INTERSTELLAR SPACE
IONS
METALS
OXIDES
OXYGEN COMPOUNDS
RADIATIONS
RADIOWAVE RADIATION
SODIUM
SPACE
SPECTRA
SUPERNOVA REMNANTS
VELOCITY