Non-LTE analysis of the SDO star Feige 110

Details Non-LTE analysis of the SDO star Feige 110 Non-LTE analysis of the SDO star Feige 110

Jun 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982esasp.176..297h&link_type=abstract

In ESA 3rd European IUE Conf. p 297-300 (SEE N83-11889 02-88)

Physics

7

Abundance, Helium, O Stars, Stellar Gravitation, Stellar Temperature, Carbon, H Lines, Nitrogen, Resonance Lines, Silicon, Stellar Atmospheres

Scientific paper

Effective temperature, gravity, and helium abundance of Feige 110 were determined by a NLTE model analysis of high resolution IUE and visual spectra. Effective temperature = 40.000 (+5000, -2500) K and log g = 5.0 (+0.5, -0.3) Cgs. Feige 110 is helium deficient (n(Ne)/n(H) = 0.03 + or - 0.01) and thus belongs to the group of sbOB-stars. The abundances of carbon and nitrogen were obtained from the analysis of ultraviolet resonance lines (C IV and N V). Nitrogen is approximately solar, whereas carbon is extremely deficient with respect to the Sun (by a factor of roughly 300,000). The Si IV resonance lines are not present in the ultraviolet spectrum.

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