Astrofizika zvezd I

Osnovno poznavanje lastnosti in evolucije zvezd;

/

1. Opazovalne lastnosti zvezd, HR diagram in klasifikacija.
2. Osnovni fizikalni opis zvezd: hidrostatično ravnovesje, enačbe stanja, virialni teorem, politropni modeli in enačba Lane Emden, termično ravnovesje, proizvodnja energije in energijsko ravnovesje, prenos energije s sevanjem in konvekcijo, karakteristični časi zvezd.
3. Nastanek zvezd: Jeansova masa, faze kolapsa oblaka, protozvezde in vstop na glavno vejo HR diagrama
4. Lastnosti zvezd na glavni veji HR diagrama.
5. Razvoj zvezd po glavni veji HR diagrama, vžig helija, višje stopnje gorenja, eksplozija supernove.
6. Kočna stanja razvoja zvezd.
7. Spremenljive zvezde, dvojne zvezde.
8. Razsute in kroglaste kopice.
9. Metode določanja oddaljenosti zvezd

Študenti bodo osvojili pojme in koncepte:
- lastnosti in klasifikacije zvezd
- nastajanje in prenos energije znotraj zvezd
- lastnosti in dinamika zvezdnih kopic
Po koncu tečaja bi morali študenti pridobiti dovolj znanja za spremljanje tečaja zvezdne astrofizike II.

1. Introduction to Stellar Astrophysics - LeBlanck (2010) Katalog E-gradivo
2. An Introduction to the Theory of Stellar Structure and Evolution (2nd Edition) – Dina Prialnik (2010) Katalog E-gradivo
3. An Introduction to Modern Astrophysics (2nd Edition) - Caroll and Ostlie (2017) Katalog E-gradivo

• kolokviji, pisni izpit
• ustni izpit

Dr. Tanja Petrushevska je docentka za področje fizika na Univerzi v Novi Gorici.

Dr. Tanja Petrushevska is an assistant professor of physics at the University of Nova Gorica. Her research interests lie in the field of observational astrophysics and cosmology, especially time domain astronomy. Her research has showed the feasibility of searches for strongly lensed supernovae with ground-based facilities and resulted in the discovery of five of the most distant core-collapse supernovae with implications on the volumetric core-collapse rates to very high redshifts. It has furthermore showed the utility of supernovae for cosmological studies, by investigating the properties of the strongly lensed and very distant supernova. As part of the intermediate Palomar Transient Factory, she has contributed to the discovery of supernovae and their study, including the first resolved, multiply-imaged supernova Ia and the first supernova forming a compact neutron star binary. Her current research also includes studying tidal disruption flares and searching for short gamma-ray bursts from supernovae induced by axion-like particles which are candidates for dark matter.

Selected publications:

1. High-redshift supernova rates measured with the gravitational telescope A1689. T. Petrushevska, R. Amanullah, A. Goobar, S. Fabbro, J. Johansson, T. Kjellsson, C. Lidman, K. Paech, J. Richard, H. Dahle, R. Ferretti, J. P. Kneib, M. Limousin, J. Nordin and V. Stanishev, A&A, Volume 594, A54, 21 pp, (2016).

2. Testing for redshift evolution of Type Ia supernovae using the strongly lensed PS1- 10afx at z =
   1.4. T. Petrushevska, R. Amanullah, M. Bulla, M. Kromer, R. Ferretti, A. Goobar and S. Papadogiannakis. A&A, vol. 603, A136, (2017).

3. iPTF16geu: A multiply-imaged gravitationally lensed Type Ia supernova. A. Goobar, 30 additional authors including T. Petrushevska, Science, vol. 356, 6335, 291-295 (2017).

4. Searching for supernovae in the multiply-imaged galaxies behind the gravitational telescope A370. T. Petrushevska, D. J. Lagattuta, R. Amanullah, A. Goobar, L. Hangard, S. Fabbro, C. Lidman, K. Paech, J. Richard, and J. P. Kneib, A&A vol. 614, A103, (2018)

5. A hot and fast ultra-stripped supernova that likely formed a compact neutron star binary K. De, 25 additional authors including T. Petrushevska, Science, vol. 362, 6411, (2018).

6. Prospects for observing strongly lensed supernovae behind Hubble Frontier Fields galaxy clusters with the James Webb Space Telescope. T. Petrushevska, T. Okamura, R. Kawamata, L. Hangard, G. Mahler and A. Goobar, Astronomy Reports, vol. 62, 12, (2018).