Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979aj.....84.1840w&link_type=abstract
Astronomical Journal, vol. 84, Dec. 1979, p. 1840-1845.
Astronomy and Astrophysics
Astronomy
22
Astronomical Photometry, Cepheid Variables, Radial Velocity, Stellar Magnitude, Radii, Stellar Luminosity, Stellar Temperature, Ubv Spectra
Scientific paper
A radial velocity curve from 38 A/mm Palomar plates of XX Vir is presented. The velocity data are combined with UBV colors to derive the radius and visual magnitude. The same method is also used to derive the visual magnitude for RR Lyrae. The results are visual magnitude (RR Lyrae) = +0.6 and visual magnitude (XX Vir) = -0.7. The luminosity for XX Vir places it among the cepheids of similar periods in globular clusters.
Brugel Edward W.
Wallerstein George
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