Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985natur.316..407f&link_type=abstract
Nature (ISSN 0028-0836), vol. 316, Aug. 1, 1985, p. 407-412. Research supported by the University of California.
Astronomy and Astrophysics
Astronomy
55
Astronomical Spectroscopy, Supernova Remnants, Supernovae, Emission Spectra, Oxygen, Quasars, Spiral Galaxies
Scientific paper
Optical spectra of a bright stellar object near the nucleus of the spiral galaxy NGC 4618 reveal strong, very broad emission lines similar to those in quasars but having the wrong relative wavelengths. Although lines of hydrogen and helium are absent, the most prominent features can be attributed to neutral atoms of oxygen, sodium, and magnesium at the redshift of NGC 4618. The object is almost certainly a supernova whose highly unusual spectrum may be indicative of a fundamentally new subclass.
Filippenko Alexei V.
Sargent Wallace L. W.
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