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A Photometric and Spectroscopic Study of 3 Vulpeculae: An Observer's Nightmare
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The suspected 53 Persei type variable 3 Vulpeculae has been on theobserving program of the Four College Consortium Automatic PhotoelectricTelescope (FCCAPT) for three years. When reducing the data it wasnoticed that the standard deviation of the check (HD182865) andcomparison (HD181164) star measures was significantly higher thanexpected on the basis of results from other observing programs. Aperiodogram analysis of these observations revealed a strong peak at0.156 c/d (6.43 days). In order to determine which of the two stars wasvarying separate periodogram analyses were performe on the variableminus comparison and the variable minus check data. Since the period ofthe variable is significantly shorter than 6 days it was hoped that oneof these two periodograms would have the 6.43 day period present whilethe other one would not. Indeed, this proved to be the case. We identifythe previously undetected variable as the check star HD182865. Theperiod is rather long to be a pulsational one for a B8 star. A search ofthe SIMBAD data base revealed no other information on this star otherthan the HD spectral type. The amplitude of variation is greatest in theStromgren u filter and least in the Stromgren y filter. This, togetherwith the B8 HD spectral type, and its rather long period lead us tosuspect that the variation is a rotational phenomenon with the period ofvariation equal to its rotational period. This would suggest that it islikely a chemically peculiar star. This work has been supported in partby NSF grants AST86-16362, AST91-15114, and USE-9156184 to the Collegeof Charleston.
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Membre dels grups següents:
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Dades d'Observació i Astrometria
| Constel·lació: | Vulpecula |
| Ascensió Recta: | 19h25m39.02s |
| Declinació: | +26°06'14.4" |
| Magnitud Aparent: | 7.368 |
| Distancia: | 595.238 parsecs |
| Moviment propi RA: | -2.8 |
| Moviment propi Dec: | -2 |
| B-T magnitude: | 7.474 |
| V-T magnitude: | 7.377 |
Catàlegs i designacions:
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