PPT-Chap 17-18: Stellar Evolution – the Life and Death of a Star…

Chap 1718 Stellar Evolution the Life and Death of a Star Heres the story well tell Lowest mass stars and their evolution Low mass star evolution High mass star evolution Stellar death and stellar corpses. 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 . Life Cycle of A Star. Lesson Goals. 1. Define the terms: . Luminosity. , . Stellar Classification, Stellar Nebulae, . Red Giant, White Dwarf, S. upernova. , . Neutron . star, and . Stellar . B. lack . . Natalia Storch, Kassandra Anderson & Dong Lai. Cornell University. Many hot Jupiter systems . have . been found to exhibit misalignment between the . orbital axis (. L. , the axis perpendicular to the orbital plane) . 12 Oct 2012. Banyuls. MODELING COUNTS AND CIBA WITH MAIN SEQUENCE AND STARBURST GALAXIES. Matthieu. Béthermin. CEA . Saclay. In collaboration with Mark Sargent, . Emanuele. . Daddi. , . Georgios. . Learning Objective:. To learn about the life cycle of a star.. Learning Outcomes:. All: Will be able to . correctly name (C) . and simply describe . (B)the . phases in a life cycle of a . star.. Most: Will be able to . 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: . Key variable is . mass. of star. directly measured only for binary stars, but it determines position on main sequence. Cluster ages. Main-sequence luminosity increases . much. faster than mass. therefore massive stars use up their fuel much faster. Wen-Ping . Chen . National . Central . University . Census of Galactic open clusters. . Dynamical evolution of a star cluster. . Star clusters as targets and as tools. Outstanding issues. 2017 April 28 PMO . 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. Evolution off the Main Sequence. Main Sequence Lifetimes. Most massive (O and B stars): millions of years. Stars like the Sun (G stars): billions of years. Low mass stars (K and M stars): a trillion years! . Here’s the Story We’ll Unfold for You…. Hubble’s galaxy classifications: Spirals, . ellipticals. , irregulars. . Structural parts of galaxies: disk, halo, nucleus, bulge. Spiral arms – tracers of star formation. Ben Keller (McMaster University). James . Wadsley. , Hugh . Couchman. CASCA 2015. Paper. : . astro-ph. : 1505.06268. Keller, . Wadsley. & . Couchman. 2015. Background Image: Gas column density of IGM around a simulated . Here’s the Story We’ll Unfold for You…. Hubble’s galaxy classifications: Spirals, . ellipticals. , irregulars. . Structural parts of galaxies: disk, halo, nucleus, bulge. Spiral arms – tracers of star formation. 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 .