First cycle
degree courses
Second cycle
degree courses
Single cycle
degree courses
School of Science
ASTRONOMY
Course unit
THEORETICAL ASTROPHYSICS (MOD. A)
SCP4067980, A.A. 2018/19

Information concerning the students who enrolled in A.Y. 2018/19

Information on the course unit
Degree course Second cycle degree in
ASTRONOMY
SC1173, Degree course structure A.Y. 2010/11, A.Y. 2018/19
N0
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Degree course track Common track
Number of ECTS credits allocated 6.0
Type of assessment Mark
Course unit English denomination THEORETICAL ASTROPHYSICS (MOD. A)
Website of the academic structure http://astronomia.scienze.unipd.it/2018/laurea_magistrale
Department of reference Department of Physics and Astronomy
E-Learning website https://elearning.unipd.it/dfa/course/view.php?idnumber=2018-SC1173-000ZZ-2018-SCP4067980-N0
Mandatory attendance
Language of instruction Italian
Branch PADOVA

Lecturers
Teacher in charge PAOLA MARIGO FIS/05
Other lecturers MICHELE TRABUCCHI

Integrated course for this unit
Course unit code Course unit name Teacher in charge
SCP4067979 THEORETICAL ASTROPHYSICS ALBERTO FRANCESCHINI

ECTS: details
Type Scientific-Disciplinary Sector Credits allocated
Core courses FIS/05 Astronomy and Astrophysics 6.0

Course unit organization
Period Annual
Year 1st Year
Teaching method frontal

Type of hours Credits Teaching
hours
Hours of
Individual study
Shifts
Lecture 6.0 48 102.0 No turn

Calendar
Start of activities 01/10/2018
End of activities 28/06/2019
Show course schedule 2019/20 Reg.2010 course timetable

Examination board
Examination board not defined

Syllabus

Common characteristics of the Integrated Course unit

Prerequisites: The whole content of the Bachelor Degree in Astronomy and the mandatory courses of the 1st year of the Master Degree in Astronomy.
Target skills and knowledge: Advanced knowledge of stellar astrophysics, extragalactic astrophysics, and cosmology.
Examination methods: Oral exam about the topics discussed during the lectures.
Assessment criteria: Critical knowledge of the program, accuracy of the exposition, demonstrated ability of reasoning and understanding links between the different topics discussed during the lectures.

Specific characteristics of the Module

Course unit contents: 1) Stellar Winds. Introduction. Coronal winds: Isothermal case. Generale case. Topology of the solution of the momentum equation. Line-driven winds: Wind dynamics. Radiative acceleration due to one single line. Optically thick case and optically thin case. Multiple line models. Kastor-Abbott-Klein formalism. Application to hot and luminous stars. Dust-driven winds: Momentum equations for the gas and dust components. Drift velocity. Drag force. Dynamical coupling gas-dust. Dust grains: chemical composition and optical properties. The single-scattering limit. Dust grain opacities. Grain cross sections. Planck mean opacities (silicates, graphite, amorphous carbon). Condensation radius and temperature of dust species. Effect of stellar pulsation in the subsonic region. Application to cool giant stars.

2) Variable stars: Introduction to Stellar Oscillations. Elements of pulsation theory. Radial Adiabatic Pulsations. Non-adiabatic treatment. Ionization-driven instability. Non-Radial pulsators. Asymptotic approximation for non-radial oscillations. Elements of Asterosismology. Deviation from asymptotic theory and scaling relations. Inverse problem and the effect of rotation on stellar pulsations. Application of direct problem for solar-like pulsators with planets.

3) White dwarfs: Overview of stellar progenitors. Degenerate structure. Cristalization. External envelope. Thermal properties and cooling laws. Effects of different chemical stratifications.
Planned learning activities and teaching methods: In-class lectures, with use of both classical methodology (lectures at the blackboard) and media (slides, movies, applets). Lectures are given in Italian.
Additional notes about suggested reading: Slides of the lectures and other material available through the Moodle website of the course on the e-learning platform of the Department of Physics and Astronomy "G. Galilei" (https://elearning.unipd.it/dfa/). The list of suggested textbooks is given.
Textbooks (and optional supplementary readings)
  • Salaris, Maurizio; Cassisi, Santi, Evolution of Stars and Stellar Populations. Chichester: Wiley, 2005. Cerca nel catalogo
  • Lamers, J. G. L. M.; Cassinelli, Joseph P., Introduction to Stellar Winds. Cambridge: Cambridge University Press, 1999. Cerca nel catalogo
  • Aerts, Conny; Christensen-Dalsgaard, Jorgen; Kurtz, Donald W., Asteroseismology. Dordrecht: Springer, 2010. Cerca nel catalogo

Innovative teaching methods: Teaching and learning strategies
  • Loading of files and pages (web pages, Moodle, ...)

Innovative teaching methods: Software or applications used
  • Moodle (files, quizzes, workshops, ...)