Multiwavelength Light-Curve Analysis of Cepheid Variables

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 ...

critical discourse analysis of two political speeches in light of bakhtins dialogism

چکیده گفتگوگری باختین نظریه ای است که به تفاوت ها احترام گذاشته و گفتگو را ارج می نهد. رشته های مختلف علوم انسانی همواره از این نظریه بهره جسته اند. با وجود این تنها مطالعات اندکی در زمینه تجزیه و تحلیل نقادانه کلام به نظریه گفتگوگری پرداخته اند. پنداشت تحقیق حاضر بر آن است که احترام به حقوق دیگران از طریق فراهم آوردن شرایط یکسان برای بیان نظریات مختلف یکی از مهمترین مشترکات تحلیل انتقادی گفتم...

Period, 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...

Reconstructing Cepheid Light Curve with Fourier Techniques I: The Fourier Expansion and Interrelations

Chow-Choong Ngeow and Shashi M. Kanbur Astronomy Department, University of Massachusetts, Amherst, MA 01003 Sergei Nikolaev Institute for Geophysics and Planetary Physics, Lawrence Livermore National Laboratory, Livermore, CA 94550 Nial R. Tanvir Department of Physical Science, University of Hertfordshire, College Lane, Hatfield, AL10 9AB, UK and Martin A. Hendry Department of Physics and Astro...

Classical Cepheid Light Curves Revisited