Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988mnras.233..697m&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 233, Aug. 1, 1988, p. 697-703.
Astronomy and Astrophysics
Astronomy
28
Infrared Astronomy Satellite, Stellar Evolution, Stellar Mass, Stellar Mass Ejection, Stellar Spectrophotometry, Supergiant Stars, H Alpha Line, Stellar Spectra, Ubv Spectra
Scientific paper
Spectroscopic and photometric observations of the IRAS source 20056+1834 are discussed. The optical counterpart has a visual magnitude of 12.5 and its spectrum appears to be that of a G0 supergiant on which are superimposed very strong, broad (140 km s-1 FWHM) Na D emission lines. Photometrically the object varies with a low amplitude and a characteristic time-scale of 50 days. A model is proposed in which a mass-losing star is obscured from direct view by a thick dust cloud so that its photosphere is seen only in reflection. The Na D emission is produced by resonantly scattered starlight in the expanding, unobscured stellar envelope.
Menzies John W.
Whitelock Patricia A.
No associations
LandOfFree
IRAS 20056+1834 - A G star reflects on its past 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 IRAS 20056+1834 - A G star reflects on its past, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and IRAS 20056+1834 - A G star reflects on its past will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1695206