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 . Richard B. . Larson. Yale University. Conclusions. Compact objects such as stars and black holes generally form in larger systems such as binaries, multiple systems, star clusters, or galaxies.. Gravitational interactions in these larger systems play a major role in the formation of compact objects by transporting angular momentum.. 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. Lately . I been, I been losing sleep. Dreaming about the things that we could be. But baby, I been, I been prayin' hard. Said no more counting dollars. We'll be counting stars. Yeah, we'll be counting stars. Stars born with more than 8 — 10 M.  . cannot . lose enough mass to become white dwarfs. . These stars die by supernova explosions.. Ignition of “metals”. The core of an old high-mass star gets little . 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, . 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. 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. ?. “. 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. Elementary Tests in STARS during 2016-2017. 2. Secondary Tests in STARS during 2016-2017. 3. mpsaz.org/stars. 4. STARS – Teacher Login. mpsaz.schoolcity.com. – Direct Link to Teacher Login. Use Active Directory credentials to log on. 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.