The composite spectrum of HD 50820.

Abstract

view Abstract Citations (2) References Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The composite spectrum of HD 50820. Underhill, Anne B. Abstract High dispersion spectra of HD 50820 have been obtained covering the spectral range XX3930- 6700. In the photographic region the spectrum appears composite showing B-type absorption lines and faint metallic absorption lines as well as strong emission features at Hp, H~, H~ and HE. In the red and yellow part of the spectrum many narrow absorption lines are visible, the Na D lines are strong in absorption, and there is a strong emission line at Ha. Comparison with other stellar spectra shows that the spectrum of HD 50820 is composite, B~e V + K2 II. This combination of spectral types is unusual, but it is shown to be consistent with the relative brightnesses of the two spectra over the observed wave-length range and with the strengths of the absorption lines. The radial velocity of the K star appears sensibly constant, and reasons are given for believing that the orbital inclination of the binary is large, thus no atmospheric eclipse is expected. At present, the emission lines, which have varied in intensity through the years, give a velocity more positive by about 12 km/sec than the velocity of the K-type lines. Dominion A strophysical Observatory, Royal Oak, British Columbia, Canada. Publication: The Astronomical Journal Pub Date: October 1954 DOI: 10.1086/107042 Bibcode: 1954AJ.....59..332U full text sources ADS | data products SIMBAD (1)