PPT-Pulsating Variable Stars

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. the first 40 years, 1953-92 . What is a Blue Straggler?. “The Failure of Occam’s Razor?” . . (Mario . Livio. 1993, ASP Conf. 53, ed. R . Saffer. , p.3). Why has it taken so long?. Inconclusive and confusing early observations. Key Ideas. Distance is the most important & most difficult quantity to measure in Astronomy. Method of Trigonometric Parallaxes. Direct geometric method of finding distances. Units of Cosmic Distance:. Acknowledgement. : Research at the University of New Hamps. hire was supported by NSF grants. .. . E-POP Observations of Pulsating Aurora. Bruce Fritz, Marc Lessard. 1. , Leroy Cogger. 2. , Andrew Yau. "There are countless suns and countless earths all rotating around their suns in exactly the same way as the seven planets of our system. We see only the suns because they are the largest bodies and are luminous, but their planets remain invisible to us because they are smaller and non-luminous. The countless worlds in the universe are no worse and no less inhabited than our Earth”. The Sun and the Stars. Stellar Lifecycle. Starbirth. Young Stars. Globular Clusters. Star Death. Star Death. Star Death. Star Death. Aims and Objectives. To introduce you to the properties of . t. he Sun and the stars, and their evolution. 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, . Theory & Observations. Hovik Grigorian. Yerevan State University. Summer School Dubna – 2012. Compact stars Physics. • physics of compact stars,. • astrophysics of compact stars,. • . Revision . lecture. Lecture slides available in . powerpoint. and . pdf. from. www.star.le.ac.uk. /~. mbu. /. lectures.html. Everything taught in the course is examinable…... However, here is a crib sheet of what to focus on. 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. The “. Cosmic Distance Ladder. ”. Visual. “. Parallax. ”. “. Binocular. Vision”…. Let’s us “see” 3D images . (depth). …but, how to do this to get . Astronomical Distances. ?. “. Gordon Myers. AAVSO Speakers Bureau. ALCON 2009. Historical Perspective – Mira. David . Fabricius. discovered “omicron . ceti. ” in 1596. Brightened from 3. rd. Tip 16 copper skin tonestars 2105-8507SMnBatWebIs50530qxd 7/12/05 1142 AM Page 1Using Your Decorating Bag and Coupler1Screw ring off coupler to expose series of tiny2Force coupler base as far down 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.