RY Leporis - A bright, high-amplitude delta Scuti star

Details RY Leporis - A bright, high-amplitude delta Scuti star RY Leporis - A bright, high-amplitude delta Scuti star

Aug 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985a%26a...149..465d&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 149, no. 2, Aug. 1985, p. 465-469. SNSF-supported research.

Astronomy and Astrophysics

Astrophysics

11

Light Curve, Metallicity, Stellar Spectrophotometry, Ubv Spectra, Variable Stars, Stellar Luminosity

Scientific paper

Walraven VBLUW photometry is reported for the variable RY Leporis (also known as HD 38882, BV 425, and 0545-200 from its Epoch 1950 coordinates). It is shown that this star - until now considered to be an eclipsing binary - is actually a relatively bright high-amplitude delta Scuti star with a period of 0.2254 day and an amplitude of delta V-sub-J = 0.35 magnitude in the Johnson system. After an evaluation of the reddening suffered by Ry Leporis (0.038 plus or minus 0.01), the basic physical parameters of this variable are determined from a semi-theoretical calibration of the colors of the Walraven system. A comparison is made of the physical characteristics of RY Leporis with observational parameters of similar variables and with theoretical calculations. The results support the 'high-mass' interpretation of large-amplitude delta Scuti stars.

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