Spectroscopic and photometric studies of the symbiotic star EG Andromedae

Details Spectroscopic and photometric studies of the symbiotic star EG Andromedae Spectroscopic and photometric studies of the symbiotic star EG Andromedae

May 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991a%26a...245..531s&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 245, no. 2, May 1991, p. 531-542.

Astronomy and Astrophysics

Astrophysics

16

Andromeda Constellation, Binary Stars, Symbiotic Stars, Giant Stars, M Stars, Stellar Spectrophotometry, Ubv Spectra

Scientific paper

Optical spectroscopic observations carried out from August 1966 to January 1987 and standard UBV photoelectric photometry obtained from August 1985 to November 1989 of the symbiotic EG And are presented and discussed. The minimum observed in U, B, V at JD 2446350 should repeat with a 482.2 day period, as inferred from the present orbital elements. The H Balmer and He I lines seem to be formed in an envelope close to the binary system, where the giant M star atmosphere is excited also by the flux of a hot object (white dwarf or neutron star). In particular H-gamma absorption features were only observed around the cool star side, while H-gamma emission features were only seen around the hot star side. The whole system is embedded in a large and thick nebula and/or wind, often evidentiated by forbidden lines of forbidden O III and forbidden Ne III in the optical range. Perturbations and moving asymmetries in the UV light curves may be caused by additional sources like disk and/or streams.

Affiliated with

Also associated with

No associations

Rating

Spectroscopic and photometric studies of the symbiotic star EG Andromedae 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 Spectroscopic and photometric studies of the symbiotic star EG Andromedae, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spectroscopic and photometric studies of the symbiotic star EG Andromedae will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1035397