The 1984 supernova in NGC 3169 - Evidence for a superwind

Abstract

view Abstract Citations (62) References (10) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The 1984 supernova in NGC 3169 : evidence for a superwind. Dopita, M. A. ; Evans, R. ; Cohen, M. ; Schwartz, R. D. Abstract Optical spectra of the Type II supernova in NGC 3169 were obtained near maximum light using the 3.9-m Anglo-Australian Telescope. A grating of 250 lines per mm in blue was used to give continuous wavelength coverage from 3400 to 7600 A. The spectra show a P Cygni structure in the Balmer lines. The high velocity component suggests a velocity of expansion of the photosphere of about 15,500 km/s while the helium lines give a velocity of 13,500 km/s. From the size of the Balmer discontinuity and the ratio of continuum fluxes at 4861 and 6563 A, a photospheric temperature of 15,500 (+ or - 1800) K is derived. The photospheric radius was at least 3 x 10 to the 14th cm. The narrow P Cygni profiles observed in H-alpha to H-delta indicate that the precursor star underwent a strong episode of mass loss just prior to the supernova event, and that the wind was outflowing at a velocity close to 3000 km/s at the time of observation. Publication: The Astrophysical Journal Pub Date: December 1984 DOI: 10.1086/184400 Bibcode: 1984ApJ...287L..69D Keywords: Balmer Series; Galaxies; Stellar Spectra; Stellar Spectrophotometry; Stellar Winds; Supernovae; Light (Visible Radiation); Photosphere; Stellar Mass Ejection; Astrophysics full text sources ADS | data products SIMBAD (2) NED (2)