Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...366..535m&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 366, Jan. 10, 1991, p. 535-543. Research supported by the Space Telescope S
Astronomy and Astrophysics
Astrophysics
46
Abundance, Accretion Disks, Cataclysmic Variables, Dwarf Novae, Nuclear Fusion, Stellar Spectra, Carbon, Emission Spectra, Line Spectra, Nitrogen, Oxygen, Spectrum Analysis, Stellar Evolution
Scientific paper
NIR spectroscopic observations of GP Com are reported. Data obtained using the 2.5-m Isaac Newton Telescope and the 4.2-m William Herschel Telescope at La Palma during April and June 1988 and with the 5-m Hale reflector at Palomar Observatory during January 1983 are presented in tables and sample spectra and discussed in detail. Number ratios H/He less than 0.00001, N/O = about 50, and N/C greater than 100 are calculated under the assumption of a uniform optically thin slab of gas in LTE. From the N overabundance it is inferred that the material observed is being extracted by Roche-lobe overflow from the secondary's H-exhausted core, at a time after most C and O have been converted to N in the CNO cycle.
Horne Keith
Marsh Thomas R.
Rosen Simon
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