73 Virginis - A new Delta Scuti variable

Details 73 Virginis - A new Delta Scuti variable 73 Virginis - A new Delta Scuti variable

Nov 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986a%26a...169..164s&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 169, no. 1-2, Nov. 1986, p. 164, 165.

Astronomy and Astrophysics

Astrophysics

1

Cepheid Variables, Dwarf Stars, Stellar Spectrophotometry, Astronomical Photometry, Color-Magnitude Diagram, Stellar Luminosity, Stellar Magnitude

Scientific paper

The star 73 Vir, a 0arcsec.1 binary, is found to show a δ Scuti-type light variation. The variation can be approximately represented as a sum of two sinusoidal terms, having the frequencies f1 = 23.275 c/d and f2 = 26.880 c/d, and the y amplitudes A1 = 0m.0058±0m.0005 and A2 = 0m.0025±0m.0006. In addition, the color index, absolute magnitude, and period, P1 = 1/f1 = 0d.04296, fit Breger's (1979) period-luminosity-colour relation for the δ Scuti variables. These results are, however, inconsistent with the MK spectral type of F0 IV - V, determined for 73 Vir by Cowley et al. (1969), which places the star close to the cool border of the instability strip.

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