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General astrophysics

General data

Course ID:	1100-3A12
Erasmus code / ISCED:	13.703 Kod klasyfikacyjny przedmiotu składa się z trzech do pięciu cyfr, przy czym trzy pierwsze oznaczają klasyfikację dziedziny wg. Listy kodów dziedzin obowiązującej w programie Socrates/Erasmus, czwarta (dotąd na ogół 0) – ewentualne uszczegółowienie informacji o dyscyplinie, piąta – stopień zaawansowania przedmiotu ustalony na podstawie roku studiów, dla którego przedmiot jest przeznaczony. / (0533) Physics The ISCED (International Standard Classification of Education) code has been designed by UNESCO.
Course title:	General astrophysics
Name in Polish:	Astrofizyka ogólna
Organizational unit:	Faculty of Physics
Course groups:	Astronomy (1st level); obligatory courses on 3rd year
ECTS credit allocation (and other scores):	9.00 Basic information on ECTS credits allocation principles: the annual hourly workload of the student’s work required to achieve the expected learning outcomes for a given stage is 1500-1800h, corresponding to 60 ECTS; the student’s weekly hourly workload is 45 h; 1 ECTS point corresponds to 25-30 hours of student work needed to achieve the assumed learning outcomes; weekly student workload necessary to achieve the assumed learning outcomes allows to obtain 1.5 ECTS; work required to pass the course, which has been assigned 3 ECTS, constitutes 10% of the semester student load. view allocation of credits
Language:	Polish
Main fields of studies for MISMaP:	astronomy
Prerequisites (description):	(in Polish) Astronomia I i II, Metody numeryczne dla astronomów, Pracownia komputerowa dla astronomów
Short description:	The course presents selected issues of the stellar astrophysics.
Full description:	Program: 1. Field of radiation: intensity, mean intensity, flux, density and pressure of radiation. Black-body. Kirchhoff law. 2. Atomic gas. Equation of state. First thermodynamic principle. Thermodynamic processes in gases. Photon gas. Maxwell and Boltzmann distributions. Saha equation. Mixture of gases: dependence between electron and total gas pressure. Equation of state of degenerate gas. 3. Interaction of matter with radiation. Macroscopic coefficients of extinction and emission. Equation of radiative transfer and its formal solution. Atomic processes of absorption and emission. Einstein coefficients. Bound-bound, bound-free, free-free processes and scattering. 4. Transport of energy in stars: radiation and convection equilibria. Diffusion approximation. Rosseland mean extinction coefficient. Criterium of convective stability. Mixing length theory. 5. Basic equations of stellar structure: conservation of mass, hydrostatic equilibrium, energy conservation, energy transport, boundary conditions. 6. Variable stars: classification, description of selected types of variable stars. 7. Stellar pulsations. Radial and non-radial oscillations. Equation of motion. Period-mean density relation. Pulsation constant. Period-luminosity-color relation. Kappa mechanism of pulsation. Instability strips on the HR Diagram. Baade-Wesselink method. 8. Double stars: classification, orbit elements, mass function, Lehmann-Filhes method. 9. Effects of the radiation pressure: Eddington brightness limit, radiative acceleration, radiative winds. 10. Ionization equilibrium in rarefied gas: Equation of statistical equilibrium, HII zones, Stroemgren spheres.
Bibliography:	1. D. Mihalas: Stellar Atmospheres 2. A. Unsoeld: Physik der Sternatmosphaeren 3. L. Aller: Atoms, Stars and Nebulae
Learning outcomes:	(in Polish) Po zakończeniu przedmiotu student: 1. Zna najważniejsze aspekty oddziaływania promieniowania z materią w gwiazdach i w ośrodku międzygwiazdowym. 2. Zna podstawowe równania budowy wewnętrznej gwiazd. 3. Potrafi wymienić i scharakteryzować najważniejsze typy gwiazd zmiennych. 4. Umie wyjaśnić mechanizm pulsacji gwiazd oraz podstawowe własności obserwacyjne gwiazd pulsujących. 5. Potrafi wyznaczyć parametry fizyczne gwiazd podwójnych.
Assessment methods and assessment criteria:	Oral exam

Classes in period "Summer semester 2023/24" (in progress)

Time span:	2024-02-19 - 2024-06-16	Selected timetable range: weekly course term Navigate to timetable MO CW TU W TH WYK FR
Type of class:	Classes, 45 hours, 30 places more information Lecture, 45 hours, 30 places more information
Coordinators:	Igor Soszyński
Group instructors:	Igor Soszyński
Students list:	(inaccessible to you)
Examination:	Course - Examination Lecture - Examination

Course descriptions are protected by copyright.
Copyright by University of Warsaw, Faculty of Physics.