Simultaneous photoelectric and single-trail spectroscopic observations of V 471 Tauri /BD + 16 deg 516/

Details Simultaneous photoelectric and single-trail spectroscopic observations of V 471 Tauri /BD + 16 deg 516/ Simultaneous photoelectric and single-trail spectroscopic observations of V 471 Tauri /BD + 16 deg 516/

Dec 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981a%26a...104...65h&link_type=abstract

Astronomy and Astrophysics, vol. 104, no. 1, Dec. 1981, p. 65-68. Research supported by the Scientific and Technical Research C

Astronomy and Astrophysics

Astrophysics

Eclipsing Binary Stars, H Lines, K Lines, Stellar Spectra, Stellar Spectrophotometry, White Dwarf Stars, Absorption Spectra, Carbon, Emission Spectra, H Gamma Line, Light Curve, Line Spectra, Photoelectric Emission, Potassium, Radial Velocity, Spectral Energy Distribution, Stellar Rotation

Scientific paper

Spectroscopic observations of the white dwarf eclipsing binary V 471 Tauri are reported, and the behavior of H-gamma and H, K lines of Ca II are investigated. The radial velocities obtained from the H-gamma 4340.47 A absorption line do not agree with the radial velocity curve from the existing absorption lines and the strong central H, K emission lines of the K0 V component. When the H and K absorption lines are examined in the single-trail spectra, two double-reversal emissions are observed within the absorption lines. In certain orbital phases (0.62 and 0.71), H-alpha is in emission, suggesting that some material exists between the components which can modify the light curve. On the other hand, the H-alpha emission, produced in conjunction with double-reversal H and K emissions of Ca II in the vicinity of the spots, can also account for the wavelike distortion of the light curve.

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