Outline for Lecture 1:

Transcription

1 Outline for Lecture 1: Course goals Course topics - any extra? Course structure - lectures - optional workshops topics Course grading - homeworks - journal discussion - course project (breakdown) - grade division vote Course schedule - Lectures & workshops fine-tune workshop schedule - Known missing days and make-up classes identify - Other important events CASS seminar & journal club QUESTIONS Context Important patterns - distribution of stars & gas in MW, other galaxies (including kinematics) - brightnesses & colors HR diagram - chemical abundance patterns - other star related stuff supernovae (types), planetary nebulae, SNR What we know from Sun - apparent size -> actual size from AU measurement from Venus orbit - mass (or GM) from planetary orbits, later GR effects - temperature & composition from spectroscopy, indicates primarily plasma - luminosity from solar constant, distance - average density - estimate core => must be gas - interior pressure hydrostatic equilibrium - interior temperature nonrelativistic plasma - spot patterns rotation, B-field - helioseismology internal structure, energy transport, rotational structure - other neutrino emission, abundance patterns relative to planets, planets themselves give important information (age!) Scaling up via HR diagram - absolute brightness (typically V & parallax needed) -> luminosity -> 4πR2sT4 - color & spectrum -> T => R (lines of constant radius) o interesting outliers supergiants, white dwarfs - star counts age in region (high density = long phase) - different HR diagrams for different systems time, composition are factors - asteroseismology Kepler can now do this for many stars

2 Physics 223 Graduate Stellar Structure 22 September 2016 h9p://pono.ucsd.edu/~adam/teaching/phys223/

3 What are the goals of this course? A detailed examinafon of the structure and physical processes governing normal stars FamiliarizaFon with the tools and resources for conducfon stellar astrophysics research FamiliarizaFon with the current body of research and outstanding problems Develop your professional scienffic skills: literature research, quanftafve analysis, esfmafon, programming, scienffic wrifng and presentafon

4 Topics Fundamental properfes of stars and cosmological context; Star & planet formafon EquaFons of stellar structure & polytrope models; ProperFes of gas, plasma, degenerate and photonic states; Energy generafon and nucleosynthesis; Energy transport via radiafon, conducfon and convecfon; Pre-Main Sequence, Main Sequence and Post-Main Sequence evolufon Degenerate stars (brown dwarfs, white dwarfs, neutron stars) [maybe] The Sun as a star; [maybe] Stellar magnefc acfvity. Are there other topics you would like to discuss?

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6 Class schedule TuTh 12:30-2pm Lecture SERF 383 We [1:30-3pm] OpFonal Workshop SERF 383 Python, MESA, Monte Carlo Methods, LaTeX, literature research, data visualizafon, scienffic wrifng, effecfve presentafons Class make up day is [ ] Th 9/29 & Tu 11/8 will need to be rescheduled Other important events: CASS Seminar We 4-5pm in SERF 383 CASS Journal Club Fr 12-1pm in SERF 383 (with pizza!)

7 Assignments XX% 4 homework assignments biweekly, 3-5 hours Will include programming XX% Class Journal Discussion discussion lead in class 1-2 page summary of arfcle writeup XX% Course Project Proposal page paper minute presentafon during finals week XX% Class parfcipafon

8 h9p://mesa.sourceforge.net/

9 Assignments XX% 4 homework assignments biweekly, 3-5 hours Will include programming XX% Class Journal Discussion discussion lead in class 1-2 page summary of arfcle writeup XX% Course Project Proposal page paper minute presentafon during finals week XX% Class parfcipafon

10 Class Journal Discussions

11 Assignments XX% 4 homework assignments biweekly, 3-5 hours Will include programming XX% Class Journal Discussion discussion lead in class 1-2 page summary of arfcle writeup XX% Course Project Proposal (LaTeX) page paper (LaTeX AAS Journal style) minute presentafon during finals week XX% Class parfcipafon

12 Assignments [20-40]% 4 homework assignments biweekly, 3-5 hours Will include programming [0-20]% Class Journal Discussion discussion lead in class 1-2 page summary of arfcle writeup [30-70]% Course Project Proposal (LaTeX) page paper (LaTeX AAS Journal style) minute presentafon during finals week [0-10]% Class parfcipafon

13 QUESTIONS?

14 Photo by John Lemieux

15 Russell 1914 (Popular Astronomy. 22, 275)

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17 color brightness

18 M13 Globular Cluster 7 kpc away 11.7 Gyr old

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20 Asplund et al. (2009, ARA&A, 47, )

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