Peculiar spectrum of the optical remnant of supernova A. D. 1006

Journal Article · Wed Nov 15 04:00:00 EST 1978 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/156596· OSTI ID:6354015

Three spectral records of the faint optical filaments in the remnant of SN 1006 show a nearly pure Balmer emission-line spectrum; the usual (O I), (O II), (O III), (N II), and (S II) lines are either very weak or absent. No explanation is offered for the peculiar spectrum; however, it is noted that SNR 1006 is the second remnant (after Tycho's) known to have such a spectrum. To explain the Balmer decrement in terms of case B recombination requires the extinction to be A/sub v/ = 3 +- 1, of which only approx. 3/4 mag seems to be due to galactic foreground obscuration (b sup II = +14/sup 0/.6). The radial velocity of the filaments is nearly constant over 5' and surprisingly low, v/sub LSR/ approx. = -40 km s/sup -1/. The absence of further, similar filaments in a 3/sup 0/ x 3/sup 0/ field centered on the radio remnant supports van den Bergh's identification of the filaments with the optical remnant of SN 1006. 3 figures, 3 tables.

• Research Organization: Cerro Tololo Inter-American Observatory, La Serena, Chile
• OSTI ID: 6354015
• Journal Information: Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 226:1; 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
BALMER LINES
COSMIC RADIO SOURCES
EMISSION SPECTRA
RADIAL VELOCITY
SPECTRA
SUPERNOVA REMNANTS
VELOCITY
VISIBLE SPECTRA