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HD 49344


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The frequency of Ap-stars with long rotation periods
Light variability was observed over time intervals of months to years inthe stars HD 55540, HD 71066, HD 94660, and HD 187474. The significanceof these results is discussed in terms of the frequency of chemicallypeculiar CP2 stars showing (light) variability with periods longer thanone month. This frequency, relative to the whole CP2 population, mustlie somewhere between 4 and 16 percent. Observations, properlydistributed in time, of a small subgroup of CP2 stars will be sufficientto obtain an accurate ratio of the number of LP-CP2 stars to the totalnumber of CP2 stars. These observations, when continued until theperiodicity is detected, could contribute also to the discussion whetherthese long periods should be identified with the rotation period.

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观测天体数据

星座:御夫座
右阿森松:06h49m49.99s
赤纬:+39°28'44.8"
视星:7.746
距离:636.943 天文距离
右阿森松适当运动:-3.7
赤纬适当运动:-2.3
B-T magnitude:7.669
V-T magnitude:7.74

目录:
适当名称   (Edit)
HD 1989HD 49344
TYCHO-2 2000TYC 2945-460-1
USNO-A2.0USNO-A2 1275-06589494
HIPHIP 32757

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