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A survey for rapid variability among early main-sequence A stars
A survey of nonpeculiar early (A0-A5) main-sequence A stars for rapid,low-amplitude variability is presented. The survey is also anindependent test of the main-sequence mass-loss theory proposed byWillson et al. (1986). All observations were gathered with theUniversity of Wisconsin Two-Star Photometer. Several period-searchingmethods are used to analyze time series of differential-photometricdata. This instrument coupled with a computerized high-speed datacollection system was used with small telescopes at Pine BluffObservatory and Table Mountain Observatory. Several period-searchmethods are used to analyze time series of differential-photometricdata. This instrument and data-reduction technique allow millimagnitudelight variations to be detected. The survey also discovered severallow-amplitude Delta Sct stars, all of which are in or blueward of therecognized instability strip.
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Посматрања и Астрометриски подаци
| Сазвежђа: | Андромеда |
| Ректацензија: | 23h15m41.31s |
| Deклинација: | +50°44'15.0" |
| Apparent магнитуда: | 8.612 |
| Даљина: | 291.545 parsecs |
| Proper motion RA: | 7.8 |
| Proper motion Dec: | -5.2 |
| B-T magnitude: | 8.842 |
| V-T magnitude: | 8.631 |
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NEWS@SKY (Science&Space News)
