Nitrogen anomalies in O-type stars - A new spectroscopic criterion

Details Nitrogen anomalies in O-type stars - A new spectroscopic criterion Nitrogen anomalies in O-type stars - A new spectroscopic criterion

Mar 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982a%26a...107..252b&link_type=abstract

Astronomy and Astrophysics, vol. 107, no. 2, Mar. 1982, p. 252-257.

Astronomy and Astrophysics

Astrophysics

23

Abundance, Nitrogen, O Stars, Spectral Line Width, Stellar Spectra, Anomalies, Dwarf Stars, Spectrum Analysis

Scientific paper

A spectroscopic analysis was performed on 95 O-type stars to detect nitrogen overabundance in an investigation of spectroscopic criteria. It is found that the N III 4514 A line is a good indicator of the abundance variations of N in O-type stars, and it is suggested that the ON phenomenon is a continuous one rather than a marked discontinuity between normal O stars and those showing nitrogen overabundance. Anomalies are investigated for several early O stars, and it is concluded that mass transfer in close binary systems and high mass loss rates due to stellar winds are the most probable mechanisms to produce ON stars.

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