Portal de Periódicos da CAPES

An Optical Atlas of Galactic Supernova Remnants

1973; Institute of Physics; Volume: 26; Linguagem: Inglês

10.1086/190278

1538-4365

Sidney van den Bergh, Alan P. Marscher, Yervant Terzian,

Stellar, planetary, and galactic studies

view Abstract Citations (224) References (122) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS An Optical Atlas of Galactic Supernova Remnants van den Bergh, Sidney ; Marscher, Alan P. ; Terzian, Yervant Abstract In this Atlas we present photographs of 23 of the 24 known optical supernova remnants (the nebulosity associated with CTA 1 is too faint to be visible on a reproduction). A tentative classification scheme for optical supernova remnants is proposed. Comparison of Baade's 1950 plate of Kepler's supernova with 200-inch (5-m) plates taken 20 years later shows that the fan-shaped optical remnant of this object is expanding with a proper motion per year. Combining this result with Minkowski's radial-velocity observations and assuming a distance of 10 kpc yields an expansion velocity of 1400 km sec -1 for the optical remnant of Kepler's supernova. This value is very similar to the expansion velocity of the Crab Nebula. Since Kepler's supernova is the prototype for supernovae of Type I, the low expansion velocity of the Crab can no longer be used as an argument against the hypothesis that the Crab Nebula was produced by a supernova of Type I. A bright giant star embedded in a reflection nebula is used to derive a distance of 550 pc to IC 443. Combining this distance with the known expansion velocity and radius of this nebula yields an age 60,000 years. This value is inconsistent with the spindown time P/(2P) 60,000 years for the pulsar 0611 + 22 that is located 0?6 from the center of IC 443. It follows that either (1) the distance to IC 443 is much greater than 550 pc or (2) the pulsar 0611 +22 is not physically associated with IC 443. It is pointed out that the optical object associated with the nonthermal source CTB 1 is morphologically very similar to the fflamentary shell that surrounds the WN5 star HD 50896. Subject heading: supernova remnants. Publication: The Astrophysical Journal Supplement Series Pub Date: August 1973 DOI: 10.1086/190278 Bibcode: 1973ApJS...26...19V full text sources ADS | data products SIMBAD (23) Related Materials (1) Erratum: 1974ApJ...191..289V