PPT-Review: Evolution of High-Mass 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 highmass star gets little . 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.. Stellar Evolution. “We . are stardust. Billion year old carbon. We are . golden”. Woodstock by Joni Mitchell. Units of Chapter 12. Leaving the Main Sequence. Evolution of a Sun-like Star. The Death of a Low-Mass Star. Go to the Physics and Astronomy Department website.. www.pa.uky.edu. Click on “. Online Course Evaluation. ” link. Link is open now. Do it soon.. The nearest stars to the Sun.. Barnard’s Star. A little bit on its . metallicity. (. Z. ). Sometimes influenced by nearby stars. Low mass stars (. M < . 8. M. Sun. ) live a long life and die slowly. High mass stars (. M. > 8. M. Sun. ) live fast and die violently. 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, . How big are stars?. How far . away?. How . luminous?. How hot?. How old, and how much longer to . live?. C. hemical . composition?. How are they moving?. Are they isolated or in clusters?. 1. How Far Away are the Stars?. 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! . 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. are . relatively widely . separated. , . their . evolution proceeds much as it . would . have if they were not . companions.... If they are . closer. , it is possible for . material . to transfer from one star to another, . Chap 17-18: Stellar Evolution – the Life and Death of a Star… Here’s the story we’ll tell… Lowest mass stars and their evolution Low mass star evolution High mass star evolution Stellar death, and stellar corpses Prof Wladimir . Lyra. Live Oak, 1119-G. Office Hours: Mon 4pm-5pm. Class hours: Mon/Wed 5pm-6:15pm. Evolution of high mass stars. The evolution we covered in last class is for low mass stars (. M < 4 M. 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 Adeetya's Kitchen & Furniture in Pune offers a selection of top-quality kitchen trolleys to maximize storage space and improve the functionality of any kitchen. https://adeetyas.com/high-quality-kitchen-trolleys-in-pune.php