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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