منابع مشابه
Discovery of Cepheid Variables Inthe
We present the results of a survey for Cepheid variables in the Virgo Cluster spiral NGC 4571 using the High-Resolution Camera (HRCam) on the Canada-France-Hawaii Telescope. Our 13 epochs, taken over a span of 800 days, have typical FWHM of 0.50 arcsec enabling 10% photometry to R 24.5 mag. The application of point-spread tting photometry and both an automated and visual search for variability ...
متن کاملPeriod, Color, and Luminosity for Cepheid Variables
Payne-Gaposehkin, Cecilia H. Period, Color, and Luminosity for Cepheid Variables. Smithsonian Contributions to Astrophysics, number 17, 10 pages, 8 tables, 1974.—The Cepheids of the Galaxy and the Magellanic Clouds display a gradation in properties, but when amplitude as well as period is taken into account, their intrinsic colors are sensibly similar. The periodluminosity relations in the thre...
متن کاملA comprehensive study of Cepheid variables in the Andromeda galaxy
Extragalactic Cepheids are the basic rungs of the cosmic distance scale. They are excellent standard candles, although their luminosities and corresponding distance estimates can be affected by the particular properties of the host galaxy. Therefore, the accurate analysis of the Cepheid population in other galaxies, and notably in the Andromeda Galaxy (M 31), is crucial to obtaining reliable di...
متن کاملPeriod-color and amplitude-color relations in classical Cepheid variables
In this paper we analyze the behavior of Galactic, LMC and SMC Cepheids in terms of period-color (PC) and amplitude-color (AC) diagrams at the phases of maximum, mean and minimum light. We find very different behavior between Galactic and Magellanic Cloud Cepheids. Motivated by the recent report of a break in LMC PC relations at 10 days (Tammann et al. 2002), we use the F-statistical test to ex...
متن کاملGalaxy NGC 6822 from Near - Infrared Photometry of Cepheid Variables
We have measured near-infrared magnitudes in the J and K bands for 56 Cepheid variables in the Local Group galaxy NGC 6822 with well-determined periods and optical light curves in the V and I bands. Using the template light curve approach of Soszyński, Gieren and Pietrzyński, accurate mean magnitudes were obtained from these data which allowed us to determine with unprecedented accuracy the dis...
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ژورنال
عنوان ژورنال: The Astronomical Journal
سال: 1957
ISSN: 0004-6256
DOI: 10.1086/107649