Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981a%26a...101..105c&link_type=abstract
Astronomy and Astrophysics, vol. 101, no. 1, Aug. 1981, p. 105-117. Research supported by the Consejo Nacional de Ciencia y Tec
Astronomy and Astrophysics
Astrophysics
63
Spectral Energy Distribution, Stellar Evolution, Stellar Luminosity, Stellar Spectra, Stellar Spectrophotometry, T Tauri Stars, Line Spectra, Main Sequence Stars, Radial Velocity, Spectrum Analysis, Stellar Mass Ejection, Stellar Models, Variable Stars
Scientific paper
A photometric and spectroscopic study of the peculiar T Tauri star V 1331 Cygni and selected objects in its vicinity is presented. From observations of the radial velocity of V 1331 Cyg and the spectral types of neighboring stars, a mean distance to the star of about 700 pc is derived, corresponding to that of the T associations in the NGC 7000/IC 5070 region. The luminosity and spectral energy distributions of V 1331 Cyg are used to estimate a spectral type of F0 to A8, with a fairly high luminosity (86 solar luminosities) and a location in the H-R diagram between the T Tauri stars and the more luminous Herbig Ae and Be stars. Analysis of photoelectric and photographic observations reveals the star not to have exhibited any significant long-term luminosity changes since 1891, although variations in the line strengths and line profiles in the stellar spectrum are observed. From the above data and simple models for the stellar envelope, mass loss rates between 7 x 10 to the -8th and 3 x 10 to the -6th solar masses/year are derived. Constraints on theoretical interpretations of the object are also indicated.
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