Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990a%26a...237...12h&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 237, no. 1, Oct. 1990, p. 12-16.
Astronomy and Astrophysics
Astrophysics
6
Emission Spectra, H Alpha Line, Stellar Envelopes, Stellar Radiation, Supernova 1987A, Stellar Structure, Stellar Winds, Supergiant Stars
Scientific paper
A high-resolution observation of an H-alpha feature in the vicinity of SN 1987A, which appears as a secondary component at v = 291 km/s in the narrow circumstellar H-alpha emission line, is reported. Its position is 2.1 + or - 0.3 arcsec NW of the supernova, and it is unresolved in this direction, with an upper limit on its radius of about 1 light-year. Its geometry perpendicular to this axis is unknown and could well be extended; e.g., arclike. Its luminosity in H-alpha is 1.6 x 10 to the 34th erg/s, and the spectral FWHM is less than 10 km/s. Several possibilities for its origin are discussed, and it is concluded that the H-alpha feature is connected with the arclike structure apparent on optical images and could be due to a dusty shell within the fossil red-supergiant wind from Sk -69 deg 202.
No associations
LandOfFree
Observation of a very narrow H-alpha feature close to SN 1987A does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Observation of a very narrow H-alpha feature close to SN 1987A, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Observation of a very narrow H-alpha feature close to SN 1987A will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1301065