Supernovae 1986 E, 1987 D, 1987 F - Photometric and spectroscopic observations

Details Supernovae 1986 E, 1987 D, 1987 F - Photometric and spectroscopic observations Supernovae 1986 E, 1987 D, 1987 F - Photometric and spectroscopic observations

Feb 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990a%26a...228...61c&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 228, no. 1, Feb. 1990, p. 61-68.

Astronomy and Astrophysics

Astrophysics

13

Stellar Spectrophotometry, Supernovae, Emission Spectra, Light Curve, Luminosity, Stellar Evolution, Stellar Magnitude

Scientific paper

Photometric and spectroscopic observations of three supernovae, 1986 E in NGC 4302, 1987 D in MCG + 00-32-01 (UGC 7370) and 1987 F in NGC 4615, were carried out at Asiago and ESO-La Silla Observatories. SN 1986 E has been classified as type II linear from its light curve. The position of the SN with respect to its parent galaxy strengthens previous suggestions that SN II linear have a progenitor of lower mass than the typical value assumed for SN II plateau. SN 1987 D belongs to the SN I-a class, with a low expansion velocity and bright absolute magnitude. The rate of the photometric decline at late stages well agrees with the value found by Barbon et al. (1984) on other SN I. SN 1987 F, while exhibiting at early stages the photometric behavior of an SN II plateau, presents several spectral peculiarities and a relatively high luminosity at late time. This confirms that SN II (in particular SN II plateau) show a higher degree of individuality than other SN types.

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