High-velocity ultraviolet iron, silicon, oxygen, and sulfur absorption features associated with the remnant of SN 1006
New low-dispersion IUE spectra of a faint sdOb star located in a direction near the center of the SN 1006 remnant are presented. The UV spectrum of the star exhibits several strong absorption features which are uncharacteristic of its optical sdOB star classification. The identification by Wu et al. (1983) of very broad absorption features at 1610, 2370, 2600 A as Fe II gas associated with the SN 1006 remnant is supported. The observed Fe II line profiles indicate a concentration of Fe(+) toward the remnant's center with a radial velocity range on the order of + or - 5000 km/s. Strong absorption lines at 1281, 1331, and 1420 A are interpreted as originating from clumps of O-, Si- and S-rich ejecta with central radial velocities in the range 5000-6500 km/s. The presence in the SN 1006 remnant of an expanding sphere of iron-rich ejecta interior to O-, Si-, and S-rich clumps of ejecta having velocities over the maximum seen for the Fe II absorbing gas is consistent with type Ia Sn observations and carbon deflagration models. 64 references.
- Research Organization:
- Colorado Univ., Boulder (USA); Computer Sciences Corp., Baltimore, MD (USA); AT and T Bell Labs., Murray Hill, NJ (USA); Joint Institute for Laboratory Astrophysics, Boulder, CO (USA)
- OSTI ID:
- 7129535
- Journal Information:
- Astrophys. J.; (United States), Vol. 327
- Country of Publication:
- United States
- Language:
- English
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GENERAL PHYSICS
SUPERNOVA REMNANTS
CHEMICAL COMPOSITION
ABUNDANCE
IRON
OXYGEN
RADIAL VELOCITY
RED SHIFT
SILICON
SULFUR
SUPERNOVAE
ULTRAVIOLET SPECTRA
WHITE DWARF STARS
COSMIC RADIO SOURCES
DWARF STARS
ELEMENTS
ERUPTIVE VARIABLE STARS
METALS
NONMETALS
SEMIMETALS
SPECTRA
STARS
TRANSITION ELEMENTS
VARIABLE STARS
VELOCITY
640102* - Astrophysics & Cosmology- Stars & Quasi-Stellar
Radio & X-Ray Sources