Infrared photometry of SN 1987A

Details Infrared photometry of SN 1987A Infrared photometry of SN 1987A

May 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26a...177l...9b&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 177, no. 1-2, May 1987, p. L9-L12.

Astronomy and Astrophysics

Astrophysics

14

Infrared Photometry, Infrared Spectroscopy, Stellar Spectrophotometry, Supernova Remnants, Supernova 1987A, Expansion, H Lines, Photosphere, Stellar Luminosity

Scientific paper

The authors present infrared (1 μm - 14 μm) photometric and spectroscopic observations of SN 1987A obtained at ESO La Silla between February 28 and March 16, 1987. A preliminary interpretation of the photometry suggests an expanding photosphere with Teff decreasing from 5800K on March 1, to 5200K on March 11; adopting a distance of 55 kpc, the luminosity increased from 3.2 to 5.5×107L_sun;, and the effective radius from 5600 to 9100 solar radii. No significant excess could yet be detected longward on the L band filter. The spectrum is dominated by hydrogen emission lines whose intensities and shapes vary on timescales as short as one day. Some of these lines show P-Cygni profiles, indicative of expansion velocities of 6000 - 10000 km/s.

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