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The Photometric Variability of Sun-like Stars: Observations and Results, 1984--1995
Using differential Stromgren b, y photometry, we monitored thebrightness variations of 41 program stars and their 73 comparison starsfrom 1984 through 1995. The predominantly main-sequence program starsspanned ranges of temperature and mean chromospheric activity centeredon solar values. About 40% of all the stars showed measurablevariability, typically at levels below 0.01 mag (~1%), on bothnight-to-night and year-to-year timescales. The variability correlatedwith mean chromospheric activity and advancing spectral type. We presentdifferential light curves and statistical descriptions of ourobservations.
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Gözlemler ve gökölçümü verileri
| Takýmyýldýz: | Kartal |
| Sað Açýklýk: | 18h56m00.49s |
| Yükselim: | +07°07'34.5" |
| Görünürdeki Parlaklýk: | 7.319 |
| Uzaklýk: | 191.571 parsek |
| özdevim Sað Açýklýk: | 4.9 |
| özdevim Yükselim: | 0.6 |
| B-T magnitude: | 7.675 |
| V-T magnitude: | 7.349 |
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