view Abstract Citations (30) References (46) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Model atmospheres for Betelgeuse. Fay, T. D. ; Johnson, H. R. Abstract We present a series of stellar atmospheric models at effective temperatures of 3800 and 3500 K and compare these in detail with scanner observations of Betelgeuse (a Ori, M2 lab). The atmospheres are hydrostatic, flux-constant, LTE atmospheres which include the opacity of H2O, CO, CN, and atomic line blanketing. To reduce the flux shortward of 6000 A enough to agree with observations requires either strong atomic line blanketing (or a similar opacity source) or significant reddening, or (likely) both. The visual extinction (an estimate of which depends strongly on the line blanketing, especially in the 1-2 micron region) lies between 0.4 and 2.0 mag. Comparison of our predicted strengths of observed CO and CN features with observations and of our predicted column densities of CO, OH, NH, and H2O with published column densities suggests that C/H may be less than its solar value by about a factor of 10 and ClO may be less than 0.6 in Betelgeuse. Subject headings: abundances, stellar - atmospheres, stellar - late-type stars - stars, individual Publication: The Astrophysical Journal Pub Date: May 1973 DOI: 10.1086/152097 Bibcode: 1973ApJ...181..851F full text sources ADS | data products SIMBAD (3)