PPT-1 Variable Stars

Some Giants and Hypergiants exhibit regular periodic change in luminosity Mira Fabricius 1595 changes by factor of 100 with period of 332d LPV like Mira not well . KTaylorwarwickacuk Abstract The Sloan Digital Sky Survey has identi64257ed a total of 212 cataclysmic variables most of which are fainter than 18th magnitude This is the deepest and most populous homogeneous sample of cataclysmic variables to date an Soprano I Hence  stars,  you  daz- zle but the sight,   you teach to Soprano II Hence  stars, \r \r \r Alto Hence  stars, hence   stars too  dim of light,  you  daz-  zle  b Pulsating Variable Stars. Overview. History of discovery. What are pulsating variable stars?. Why are they important?. Any recent works?. Pulsating Variable Stars. History. 1595 – David Fabricius. o Ceti,. B-V color index way of quantifying this - determining spectral class - using two different filters. one a blue (B) filter that only lets a narrow range of colors or wavelengths through centered on the blue colors, . Cepheids. Very late in their lives, massive stars can pass briefly through a stage in which they are . unstable.. During this stage, . their outer. parts oscillate . (. ‘. pulsate. ’. ) in . a. nd out. 25 years of Astronomy. Etteyeb Nejmeddine. 21 years old. The Astronomical Society of Tunisia (SAT) . The Charlie Bates Solar Astronomy Project (CBSAP). Computer Science . What Are Variable Stars?. Detecting variability. Chapter . 13, . Sections . 1. -5,7 (12 . pages). Homework for Next Time: . www.galaxyzoo.org. Question. Which of these is a picture of the Milky Way?. A. B. D. C. The Milky Way. Angular Size. Andromeda: MW’s Sister Galaxy. 23. Jeff Wilkerson. Luther College. RAC. July 13, 2010. We image 3 clusters per year: M23 and two others. Image durations: 2 to 12 seconds, unfiltered. Campaign durations: 5 to 7 months. Return to a cluster at least once. Mark Blackford. Outline. Where does DSLR photometry fit?. Limitations. Advantages . Which . camera . and lens?. Tripod configuration . T. racking mount. Camera . settings . Software . control of camera and . constellations. a. Ancient cultures used . mythology. or everyday items to name constellations. 2. Modern astronomy studies . 88 . constellations. 3. Some constellations are not . visible. all year because Earth revolves around the Sun. Stars 1. Patterns of stars – constellations a. Ancient cultures used mythology or everyday items to name constellations 2. Modern astronomy studies 88 constellations 3. Some constellations are not Gordon Myers. AAVSO Speakers Bureau. ALCON 2009. Historical Perspective – Mira. David . Fabricius. discovered “omicron . ceti. ” in 1596. Brightened from 3. rd. Jeremiah Horrocks Institute. University of Central Lancashire. 11/26/10. IAC WS 2010 – Lecture 3. 11/26/10. IAC WS 2010 – Lecture 3. Pieter de Groote . PhD thesis. 11/26/10. Shorter time scale photometrically variable stars. A . star is a massive ball of plasma that emits . light and electromagnetic energy . throughout the universe. . While . there is only one star in our solar system, there are billions upon billions of stars throughout our galaxy and exponentially more in the billions of galaxies in the universe.