'Instability strip' diaporamas de présentation

M31: The Andromeda Galaxy 2 million light years from us

M31: The Andromeda Galaxy 2 million light years from us. http://antwrp.gsfc.nasa.gov/apod/. Milky Way Galaxy. 25,000 light years, Or ~ 8 kpc. 200 billion stars. Galactic year = 225 million yr Our sun is 4.6 billion yr old. 1 pc = 3.26 ly.

1.3k views • 103 slides

Asteroseismology of the ZZ Ceti star KUV 08368+4026

433 views • 34 slides

Crash Course in Stellar Pulsation

Crash Course in Stellar Pulsation. Ryan Maderak A540 April 27, 2005. Mechanisms. k mechanism Compression of partial ionization zones -> ionization -> small change in T k ~ r / T 3.5 , increase r -> increase k g mechanism

484 views • 34 slides

Ronald L. Westra Department Mathematics Maastricht University

Introduction to Astrophysics. Ronald L. Westra Department Mathematics Maastricht University. Introduction to Astrophysics. 1. Astronomic Scales in Space and Time. Earth Sun Jupiter.

377 views • 28 slides

RR Lyraes

RR Lyraes. Bi-Qing For Chris Sneden (UT) George Preston (Carnegie Observatory). What are RR Lyrae stars?. APOD 23 Feb 2001. What happens when stars cross the instability strip?. They pulsate like a jello!. Scientific Computing in the School of Physics at the University of Sydney.

318 views • 17 slides

Hydrogen Burning and Pulsations on Low Mass Helium Core White Dwarfs

Hydrogen Burning and Pulsations on Low Mass Helium Core White Dwarfs. Justin D. R. Steinfadt Lars Bildsten UCSB Wild Stars in the Wild West II 14th North American Workshop on Cataclysmic Variables and Related Objects March 16, 2009. Creating He-Core White Dwarfs. (Girardi et al. 2000).

243 views • 12 slides

Cepheid Variables

Cepheid Variables. Hydrostatic equilibrium . When a stars thermo nuclear fusion equals the pull of gravity the star is in equilibrium Like our sun. Pulsating variable stars .

476 views • 10 slides