PPT-Stellar evolution and star clusters

Key variable is mass of star directly measured only for binary stars but it determines position on main sequence Cluster ages Mainsequence luminosity increases much faster than mass therefore massive stars use up their fuel much faster. Galaxies. T.Naab. , P. Johansson, R. . Cen. , K. . Nagamine. , R. . Joung. . and J.P.O.. PPPL:, 19 Dec . 2012. ApJ.L.,. 658,710 . (2007) ApJ.,697, . 38 . (2009). ApJ.L.,699,L178 (. 2009. ). ApJ.,725,2312 . . atmospheres. a . very. . short. . introduction. Part I. Ewa Niemczura. Astronomical. . Institute. , . UWr. eniem@astro.uni.wroc.pl. Stellar. spectra. Stellar. spectra. One picture is worth 1000 words, but . Patricia . Sánchez-Blázquez. (UAM). Jairo. Mendez-Abreu (IAC). Sebastian F Sánchez (UNAM). Isabel Perez (UGR). Fabian Rosales-Ortega (UAM). And . the CALIFA collaboration. Resolved stellar . population. With a wide-field multi-IFU spectrograph. Cluster studies. Clusters provide large samples of galaxies in a moderate field. Unique perspective on the interaction of galaxies with their environment. As they operate much as a closed box, they are useful as tracers of galaxy evolution and of cosmology. . CDM Cosmology. Oleg . Gnedin. (University of Michigan. ). What we knew before HST: globular clusters are old, dense, compact – a distinct type of stellar spheroids. Kormendy. (1985). Over 20 years the Hubble Space Telescope has revealed young massive star clusters in interacting and gas-rich galaxies.. Drs. Carol Christian, Antonella Nota, and Brad Whitmore. May 7, 2015. Stars /Star Clusters. Carol Christian. Stars form from gas and dust clouds. The clouds collapse due to gravity. Also the clouds can collide / compress. 1. /28. Important for transits (see next slides).. . Transit depth = [ . R. planet. (. λ. ,t. ) / . R. star. (. λ,t. ) ]. 2. Not so important for eclipses because the eclipse is a simple difference, and the stellar variability typically is slower than the eclipse: . metallicity. gradients . in disk galaxies from . integrated stellar populations. Patricia Sánchez-. Blázquez. . And the CALIFA collaboration. Evolution of the . metallicity. gradients in cosmological simulations. Oleg . Gnedin. (University of Michigan. ). g. raduate student . Hui. Li. Star clusters are dominant components of active star formation:. they connect small-scale SF (local) and global processes in galaxies. 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. Distances:. Parallax Detected!. . The Problem Faced by Astronomers. [cast your mind back to the 1700s and 1800s]. There are . hundreds of thousands . of stars visible through small telescopes. Only a tiny fraction of them will display measureable heliocentric parallax -- and you don’t know which they are!. JEFFREY HALL. LOWELL OBSERVATORY, FLAGSTAFF, AZ. Project Timeline. 1988 1992 1996 2000 2004 2008 2012 . Construction/early observing. Rebuild 1. Broad survey. Solar analog survey. Rebuild 2. A/D boundary. . Matt Crouch.  . Project Manager. Kathleen . Weissenberger. State CDBG Director. Indiana Office of Community and Rural Affairs. 2014 Regional Conference. Indiana’s Stellar Communities. A first of its kind collaboration between:. Laura . Magrini. INAF- . Osservatorio. . Astrofisico. di . Arcetri. In Our Galaxy. Open clusters (disc population): . Many (~2200 known clusters). . even more new candidates in the inner disc from infrared surveys .