An atlas of confirmed and candidate supernova remnants in M33

Journal Article · Mon Jan 01 04:00:00 EST 1990 · Astrophysical Journal, Supplement Series; (USA)

DOI:https://doi.org/10.1086/191409· OSTI ID:6851678

Long, K S; Blair, W P; Kirshner, R P; Winkler, P F ^[1]

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1. Johns Hopkins Univ., Baltimore, MD (USA) Harvard-Smithsonian Center for Astrophysics, Cambridge, MA (USA) Middlebury College, VT (USA)

Thirty emission nebulae in M33 have been discovered which, on the basis of strong forbidden S II compared with H-alpha, are almost certainly supernova remnants. The total number of known supernova remnants in M33 is now about 50. The cumulative number versus diameter relationship for the nebulae in the sample appears to show evidence of shock deceleration. The number of supernova remnants in M33 is consistent with a supernova rate of one per 26-300 yr. The observations are described and positions, diameters, line ratios, and images of the new candidates are presented, as well as 10 previously known and two suggested supernova remnants in M33 that were in the survey region. 57 refs.

• OSTI ID: 6851678
• Journal Information: Astrophysical Journal, Supplement Series; (USA), Journal Name: Astrophysical Journal, Supplement Series; (USA) Vol. 72; ISSN APJSA; ISSN 0067-0049
• 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
BALMER LINES
CATALOGS
CONFIGURATION
COSMIC RADIO SOURCES
DETECTION
DOCUMENT TYPES
ELEMENT ABUNDANCE
ELEMENTS
ENERGY-LEVEL TRANSITIONS
FORBIDDEN TRANSITIONS
GALAXIES
NONMETALS
OXYGEN
SPIRAL CONFIGURATION
SULFUR
SUPERNOVA REMNANTS