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About the Course Astrophysics of Stars Advanced Astrophysics FIZ635E K. Yavuz Ekşi İTÜ Advanced Astrophysics About the Course Astrophysics of Stars Outline 1 About the Course Course content References Course Evaluation Course Schedule 2 Astrophysics of Stars İTÜ Advanced Astrophysics About the Course Astrophysics of Stars Course content References Course Evaluation Course Schedule What does the course cover? Astrophysics of compact objects (BH, NS, WD) High Energy Astrophysics X-ray astronomy Astrophysical Fluid Dynamics & Accretion disks Radiative processes & Radiative transfer İTÜ Advanced Astrophysics About the Course Astrophysics of Stars Course content References Course Evaluation Course Schedule General Books on High Energy Astrophysics Introduction to High-Energy Astrophysics, Rosswog & Bruggen, Cambridge University Press; 1st edition (2007) High Energy Astrophysics, Melia, Princeton Series in Astrophysics; 1st edn (2009) Foundations of High-Energy Astrophysics, Vietri, University of Chicago Press; 1st edn (2007) High Energy Astrophysics: Volume 1, Particles, Photons and their Detection, Longair, 2nd edn (1992) Exploring the X-ray Universe, Soward & Charles, Cambridge University Press; 2nd edn (2010) İTÜ Advanced Astrophysics About the Course Astrophysics of Stars Course content References Course Evaluation Course Schedule Books on astrophysical fluids Astrophysical Flows, J. E. Pringle, A. King, Cambridge University Press; 1st edition (2007) Principles of Astrophysical Fluid Dynamics, Clarke, Carswell, Cambridge University Press; 1st edition (2007) Astrophysical Hydrodynamics: An Introduction, Shore, Publisher: Wiley-VCH; 2nd edition (2007) Physics of Astrophysics Vol II: Gas dynamics, Shu, University Science books (1991) Accretion Power in Astrophysics, Frank, King & Raine, Cambridge University Press, 3rd edition (2002) İTÜ Advanced Astrophysics About the Course Astrophysics of Stars Course content References Course Evaluation Course Schedule Books on radiative processes Radiative processes in astrophysics, Rybicki & Lightman, Wiley-VCH (1985) Physics of Astrophysics Vol I: Radiation, Shu, University Science books (1991) Astrophysics Processes: The Physics of Astronomical Phenomena, Bradt, Cambridge University Press (2008) Theoretical Astrophysics: Volume 1, Astrophysical Processes, Padmanabhan, Cambridge University Press (2000) İTÜ Advanced Astrophysics About the Course Astrophysics of Stars Course content References Course Evaluation Course Schedule Books on compact objects Compact Objects in Astrophysics: White Dwarfs, Neutron Stars and Black Holes, Camenzind, Springer (2005) Black Holes, White Dwarfs and Neutron Stars: The Physics of Compact Objects, Shapiro & Teukolsky Rotation and Accretion Powered Pulsars, P. Ghosh, World Scientific Publishing Company; 1st edition (2007) Pulsar Astronomy, Lyne & Graham-Smith, Cambridge University Press, 3rd Edn (2006) Compact Stars: Nuclear Physics, Particle Physics and General Relativity, Glendenning, Springer, 2nd Edn. (2000) İTÜ Advanced Astrophysics About the Course Astrophysics of Stars Course content References Course Evaluation Course Schedule Internet Resources There are many links from the webpage of the course http://www.fizik.itu.edu.tr/eksiy/adv_astro/ADV_ ASTRO.htm İTÜ Advanced Astrophysics About the Course Astrophysics of Stars Course content References Course Evaluation Course Schedule Course Evaluation 7 Homework (15%) 7 Quiz (15%) 1 MT (30%) 1 Final (40%) İTÜ Advanced Astrophysics About the Course Astrophysics of Stars Course content References Course Evaluation Course Schedule Course Schedule Unify the lectures as Tuesday 13.30-16.30? My favorite! Unify the lectures as Wednesday 13.30-16.30? Terrible! Unify the lectures on Friday? Could be OK. İTÜ Advanced Astrophysics About the Course Astrophysics of Stars Astrophysics of stars Astrophysics of compact objects start after the life of normal stars. Normal stars radiate by thermonuclear fusion. They are in hydrostatic equilibrium: thermal pressure balances gravity. A stars life depends mostly on its mass, then on its chemistry and rotation. İTÜ Advanced Astrophysics About the Course Astrophysics of Stars Solar quantities The mass of the Sun is M = 1.9891 × 1030 ∼ 2 × 1030 kg. The luminosity of the Sun is L = 3.84 × 1026 ∼ 4 × 1026 W. The radius of the Sun is R = 6.955 × 108 ∼ 7 × 108 m. The distance of the Sun is 1 AU = 1.496 × 1011 ∼ 1.5 × 1011 m. The radiative flux the Earth receives from the Sun is then F = L 4 × 1026 W = = 1414.7 W /m2 4πd 2 4π(1.5 × 1011 )2 İTÜ Advanced Astrophysics About the Course Astrophysics of Stars The Sun is a black body İTÜ Advanced Astrophysics About the Course Astrophysics of Stars Luminosity of a black body L = AσT 4 For a spherical object (star) A = 4πR 2 . İTÜ Advanced Astrophysics About the Course Astrophysics of Stars Effective temperature Effective temperature is defined as the temperature an object should have in order to have the same luminosity. Solar effective temperature is then Te = L 2 4πR İTÜ 1/4 = 5777 K. Advanced Astrophysics