Time-dependent spectropolarimetry of the red variable V CVn

Details Time-dependent spectropolarimetry of the red variable V CVn Time-dependent spectropolarimetry of the red variable V CVn

Apr 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986aj.....91..919m&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 91, April 1986, p. 919-924.

Astronomy and Astrophysics

Astronomy

15

Polarimetry, Stellar Spectrophotometry, Variable Stars, Visible Spectrum, Atmospheric Stratification, Photosphere, Semiregular Variable Stars, Spectral Bands, Time Dependence

Scientific paper

Systematic spectropolarimetric observations over the cycle of the semiregular red variable V CVn were obtained. The observed variations across the 4955 A TiO band give further credence to the hypothesis of a photospheric origin for most of the optical polarization in this object and, in particular, they support the existence of an intermediate scattering layer in the stellar photosphere. The importance of spectropolarimetry to test and improve such late-type model atmospheres, especially those incorporating spherical, non-LTE conditions, is pointed out.

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