| Abstract: | We report 15 new times of maximum light for the ?? Scuti star IP Virgirnis (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 -7.4 ?? 10-9 days day-1. Evidence is also presented that IP Vir is a double-mode variable with a period ratio of ??1[??0 = 0.774. This period ratio predicts a [Fe/H] value of -0.3. From photometric (uvby??) observations, we find a foreground reddening of E(b - y) = 0.008 mag and a metallicity of [Fe/H] = +0.05. It is shown that [Fe/H] = -0.3 is most likely the correct value. Intrinsic (b - y)- and c1-values, plotted in a model atmosphere grid, indicate a mean effective temperature, ???Teff??? = 7400 K, and a mean surface gravity, ???log g??? = 3.89. All of these physical parameters support Landolt‘s initial conclusion that IP Vir is an ordinary ?? Sct star. |
| Genre: | Article |
| ProdID: | 70021135 |
| Citation Author: | Joner, M. D.; Hintz, E. G.; Collier, M. W. |
| Citation Contributing Office: | |
| Citation Datum: | |
| Citation Day: | |
| Citation Edition: | |
| Citation Editor: | |
| Citation End Page: | 457 |
| Citation Issue: | 746 |
| Citation Keywords: | |
| Citation Language: | English |
| Citation Larger Work Title: | Publications of the Astronomical Society of the Pacific |
| Citation LatN: | |
| Citation LatS: | |
| Citation LonE: | |
| Citation LonW: | |
| Citation Month: | |
| Citation No Pagination: | |
| Citation Number Of Pages: | 7 |
| Citation Online Only Flag: | |
| Citation Phsyical Description: | |
| Citation Projection: | |
| Citation Public Comments: | |
| Citation Publisher: | |
| Citation Series: | |
| Citation Series Code: | |
| Citation Series Number: | |
| Citation Search Results Text: | Photometric studies of ?? Scuti stars. I. IP Virginis; 1998; Article; Journal; Publications of the Astronomical Society of the Pacific; Joner, M. D.; Hintz, E. G.; Collier, M. W. |
| Citation Start Page: | 451 |
| Citation Volume: | 110 |
| Citation Year: | 1998 |
| Type: | citation/reference |
| Text: | Photometric studies of ?? Scuti stars. I. IP Virginis; 1998; Article; Journal; Publications of the Astronomical Society of the Pacific; Joner, M. D.; Hintz, E. G.; Collier, M. W. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Thu, 1 Jan 1998 00:00 -0600 |
| Publisher: | |
