Other
Scientific paper
May 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aas...212.1201c&link_type=abstract
American Astronomical Society, AAS Meeting #212, #12.01; Bulletin of the American Astronomical Society, Vol. 40, p.205
Other
1
Scientific paper
Brightness and spectral variations of Eta Carina occur over a 5.5 year cycle. Emission lines were observed to fade in 1948, 1962, 1981, 1987, and 1992 (Damineli 1996, ApJ, 460, L49), and 1997 (Eta Carinae at the Millennium, ASP Conf. Ser. 179, ed. J.A. Morse, R.M. Humphreys, and A. Damineli). Gaps in the observation of spectra occur in 1970 and 1975 when two other such occurrences of the 5.5 year cycle were expected. Objective prism photographic plates of Eta Carina were found in the Astronomical Photographic Data Archive located at Pisgah Astronomical Research Institute. The plates belong to the University of Michigan survey (Houk 1978, Michigan Catalogue of Two-dimensional Spectral Types for the HD Stars). One plate, IN emulsion + RG1 filter, was taken on 1968 July 4 UT. The other plate, IIaO emulsion, was taken on 1972 March 12 UT. These plates were taken between the 5.5 year cyclic events of 1970 and 1975 and therefore represent the usual emission line spectra. The spectrum of Eta Car was extracted from each of the objective prism plates and will be presented.
Barker Terrance
Castelaz Michael
Cline Donald J.
No associations
LandOfFree
Spectra of Eta Carina from Objective Prism Photographic Plates 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 Spectra of Eta Carina from Objective Prism Photographic Plates, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spectra of Eta Carina from Objective Prism Photographic Plates will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1395212