High-velocity ultraviolet iron, silicon, oxygen, and sulfur absorption features associated with the remnant of SN 1006

Journal Article · Fri Apr 01 04:00:00 EST 1988 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/166179· OSTI ID:7129535

Fesen, R A; Wu, C C; Leventhal, M; Hamilton, A J.S.

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), Journal Name: Astrophys. J.; (United States) Vol. 327; ISSN ASJOA
• Country of Publication: United States
• Language: English

Related Subjects

640102* -- Astrophysics & Cosmology-- Stars & Quasi-Stellar
Radio & X-Ray Sources
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ABUNDANCE
CHEMICAL COMPOSITION
COSMIC RADIO SOURCES
DWARF STARS
ELEMENTS
ERUPTIVE VARIABLE STARS
IRON
METALS
NONMETALS
OXYGEN
RADIAL VELOCITY
RED SHIFT
SEMIMETALS
SILICON
SPECTRA
STARS
SULFUR
SUPERNOVA REMNANTS
SUPERNOVAE
TRANSITION ELEMENTS
ULTRAVIOLET SPECTRA
VARIABLE STARS
VELOCITY
WHITE DWARF STARS