Photometric studies of δ Scuti stars. I. IP Virginis
We report 15 new times of maximum light for the δ Scuti star IP Virginis (formerly known as SA 106‐1024). An analysis of all times of maximum light indicates that IP Vir has been decreasing in period at a constant rate of − days day−1. Evidence is also presented that IP Vir is a double‐mode variable with a period ratio of . This period ratio predicts a [Fe/H] value of −0.3. From photometric (uvbyβ) observations, we find a foreground reddening of .008 mag and a metallicity of [Fe/H] = +0.05. It is shown that [Fe/H] = −0.3 is most likely the correct value. Intrinsic ‐ and c1‐values, plotted in a model atmosphere grid, indicate a mean effective temperature, K, and a mean surface gravity, . All of these physical parameters support Landolt's initial conclusion that IP Vir is an ordinary δ Sct star.
Citation Information
Publication Year | 1998 |
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Title | Photometric studies of δ Scuti stars. I. IP Virginis |
DOI | 10.1086/316156 |
Authors | Michael D. Joner, Eric G. Hintz, Matthew W. Collier |
Publication Type | Article |
Publication Subtype | Journal Article |
Series Title | Publications of the Astronomical Society of the Pacific |
Index ID | 70021135 |
Record Source | USGS Publications Warehouse |