This page provides lecture notes, texts of home assignements and other material, such as the tutorial notes. Please note that this is the only sure source of information on ASTB23. Quercus is used for announcements and submission of assignments only.
Tutorials are NOT meant for the explanation of Lectures -
they deal with simple astrophysical calculations not discussed in lectures.
If you want a good grade on the written parts of exams and the home assignments,
please come to tutorials with some kind of calculating device and practice
solving problems.
Office hours: an hour after lectures, half an hour after tutorial.
I open to discussions about astrophysics, academic career, supercomputers,
aerodynamics, or the meaning of life, universe and everything at quite irregular
times, in my office. Please drop by and if I'm too busy then you can come later.
Class participation are a few points given not just for showing up, but for above-average activity: asking and answering questions in class, volunteering to solve tutorial problems. Those who are noticeably inactive, don't get activity points. Extra book reading is described in one of the subsections below.
Minimum percentage marks for letter grades (for orientation only; grades are
reported as percentages):
A+ 90%, A 85%, A- 80%, B+ 77%, B 73%, B- 70%,
C+ 67%, C 63%, C- 60%, D+ 57%, D 53%, D- 50%, F 49% or less.
E.g., in the first introductory lecture we use
Lecture 1 notes .
and in the 7th we use
Lecture 7 notes .
This will change after the midterm, when we discuss galaxies and universe.
(Notes below will be published just before our meetings.)
Lectures 13-14 notes ,
Lectures 15-16 notes ,
Lectures 17-18 notes ,
Lectures 19-20 notes ,
Lectures 21-22 notes ,
Lectures 23-24 notes
Assignments are meant to be doable in 7 days, but will be published more than a week before the deadline, usually 9 days before. If you have a letter from AcessAbility office, then even somewhat earlier.
If a link to something current (apparently due so on) doesn't work, please let me know asap. But if you see an inactive link to far-off assignments, lectures or exams (>10 day in advance), that's normal. Wait for the link to be activated.
Some assignments may look like something existing on internet. Using such resources is counterproductive & dangerous, as I am known to change some hard-to-notice details of assignments every year (a few students were caught this way - plagiarism is a serious offense).
Except in emergencies, there is no grace period (no late submissions of assignments), because I will sometimes post & discuss solutions on the due day, before you forget what the assignment was all about. [If you have an emergency preventing you from obeying the deadline, state the nature of the emergency in an email to the lecturer. You will be considered for exception of due date if the delay is short, or for transfer of points otherwise. If you encounter sudden medical issues, see a doctor a.s.a.p. and get a notice; this is required to successfully ask for transfer of points to final exam, if you miss the midterm exam for medical reasons.]
2 double-sided hand-written (not printed or photocopied) sheets of own notes are allowed at midterm. Calculators are required. Otherwise, phones, electronic devices and books are not allowed.
You solve the quiz by marking Y or N in front of a supplied question, not on a separate sheet (no scantrons) and not in the examination booklet, and return the exam sheets. WARNING: circle at least one word or number that is wrong, in case you decide the statement in the quiz is wrong (N). Otherwise it will be considered that you guessed an answer and you will not get a credit for that particular sentence in the quiz.
How does one prepare best? There will be one written problem, very
similar to the assignments, and some of the tutorial problems,
so please review all those (tutorial notes section).
The standards of description in your solution of the problem are the same
as for home assignment - cf. the top of tutorial notes.
If you don't describe the steps in a solution in words
and only include mathematical doodles, you run a risk of not being
fully understood and appreciated.
The quiz should take you less than 20 minutes. It will contain ~27 Y/N questions similar to the ones listed in the practice files provided below; you can divide the hour however you like between quiz and the problems.
The material is our textbook 1 up to and INCLUDING Chapter 5, plus Lectures. One example of things we dealt with is the definition and usage of optical depth τ, which was not discussed much in the textbook. So there could be a question about it in Quiz or the writtem part.
Exceptions
I list here the those sections (whole subsections, only beginning pages
are quoted) that may be interesting per se, but will not be required
at exam:
Introduction by Lord Rees (Dr Rees was made a baron by our former
Queen for achievements in astrophysics).
Preface by the author (page numbers are Roman numerals).
Box on p. 32
Chapter 4, i.e. the details of how to set up the inequality for beta (gas
pressure to total pressure ratio) and what the solutions are - it's not
important for us.
Probably also:
Pages 110-115
Global Networks and Solar Observatories in Space subsections p.127
Subsection Effect of a Magnetic (..) p.136
Rotational Splitting section p. 138
Mass states and Flavour (...) p. 160
Quantum Oscillations p. 165
The quiz is sampling your understanding of concepts and knowledge of facts from both the lecture notes and the textbooks. You won't be tested on precise dates of historic events, although it's a good idea to know what happened in which century, or which concepts preceded some later concepts. Knowledge of what a key figure did (Eddington or Fraunhoffer, for instance) is required, their detailed biographies not.
2023 quiz preparation exercises:
Many answers are provided. Please start the preparation by solving the
questions from the first file, without answers, and only then check your
answers. The sample questions indicate the format of the quiz and some of
the most important topics that will be tested. Few of these questions
will be found in the actual test. This set is thus not sufficient to
prepare for the midterm - you need to study from the book and your notes.
[Let me repeat, so nobody gets that part wrong:
You will have to circle at least one word or
formula which makes the sentence wrong, if you mark it as wrong.
Not doing so will result in zero points,
even if the sentence indeed is false.]
Questions only
Question and many answers
The 2023 midterm:
PDF with solutions
As to the mathematical prereqs, please make sure that you know how to do full derivatives, for example if $z=2 c x^3$, and $c$ does not depend on $t$, then $dz/dt = 6 c x^2 \,dx/dt$, not just $dz/dt = 6 c x^2$. Know the method of separation of variables for the simple 1st order ODEs. As an example, the ODE $dy/dt = -t y/2 $ with initial condition $y(0)= e = 2.718..$ would be solved by the following steps: $dy/y = x^2 \,dx$, $\int dy/y = -(1/2)\int t \,dt$, $ln y +const. = -t^2$. In order to satisfy init. cond., $const. = -1$. Solution: $y(t) = e^{1-t^2}$.
Astronomical prerequisites include, among others, the familiariy with the parallax method of distance determination, magnitude brightness scale ($ m = -2.5\, \log I + const. = -2.5 \log (L/4\pi r^2) + const.), and the use of Hubble's law.
First, please review the whole material for midterm preparation mentioned above, including the textbook no. 1 for the quiz, as well as tutorial notes. Pay attention to the proper method to solve written problems, presented at the top of that page.
For white dwarfs and other degenerate objects, in textbook 2 read Chapters 3,5,6, and 7 up to page 91, omitting anything that was clearly and and repeatedly indicated in lectures to be not required, mainly the degenrate pressure in case of non-negligible temperature (fuzzy Fermi ball in velocity space, while we only studied sharp Fermi sphere of cold degenerate gas). Learn stellar evolution from Lecture notes, chapters later than 7 in book 2 are not required.
For galaxies and universe - study the lecture notes closely. Familiarity with textbook 3 if not mentioned explicitly in the lecture notes is not required, in the sense that I won't ask questions that are only described in the Sparke+Gallagher book but not mentioned in Lectures. If you are not sure how certain things work and want to check the book on a subject discussed concisely in the lectures, that would be a very good idea. For written problems, don't forget to consult the tutorial notes page, as well as all the assignment sets and solutions.
The format of the final examination will be exactly he same as that of the midterm,
only longer (almost 3 hrs instead of 1). No Scantron sheets,
you will return the Y or N circled in front of the question + circle the wrong
word(s), if any.
In the materials below, most stellar topics will not be repeated, though in
the final exam they'll be present (up to 40 percent of the final exam).
Preparation to the final exam's quiz is given here
in this TXT file.
The version of this file with partial answers is
present here.
Preparation for the final exam's written problem (in addition to
the sources listed above) are here:
Problems with many hints or solutions
Please read the relevant parts of textbooks and pay close
attention to lecture notes. In fact, only textbook 1 is very
important, textbooks 2 is less important, texbook 3 is completely optional.
(The second part of the course was based on lecture notes with just a few
encouragements to look at book chapters in case those notes were not clear.)
I'll give you one more chance to come and talk about the book (on a 1st-come-1st-served basis) during the exam session. Come to my office SW506G on Thu 14 Dec, 3-5pm.
https://apod.nasa.gov/debate/debate20.html
The Great Debate: The Shapley-Curtis Debate in 1920
http://seds.lpl.arizona.edu/messier/xtra/supp/gal-ttab.html
Hubble Types of Galaxies
as illustrated by the Messier galaxies
http://www.astr.ua.edu/keel/galaxies/classify.html
Galaxy Classification
https://www.theregister.co.uk/2017/01/04/new_nasa_mission_to_explore_the_hidden_gems_of_the_universe/
NASA eyes up supermassive BH and NS
https://www.theregister.co.uk/2018/08/03/blast_from_the_past_boffins_find_the_fastest_exploding_nonsupernova_star_in_the_milky_way/
Eta Carinae
http://adc.gsfc.nasa.gov/mw/mmw_images.html
Multiwavelength Milky Way Maps
http://www.astr.ua.edu/keel/galaxies/
Galaxies and the Universe - WWW graduate-level Course Notes
http://canopus.physik.uni-potsdam.de/~axm/photo.cgi?Image=images/mwpan45s_full
360-degree Milky Way Panorama
http://www.anzwers.org/free/universe/index.html
Atlas of the Universe
http://dir.yahoo.com/Science/Astronomy/Galaxies/Milky_Way/
The Milky Way Galaxy - Yahoo links
http://dir.yahoo.com/Science/Astronomy/Galaxies/Andromeda/
Andromeda Galaxy
http://dir.yahoo.com/Science/Astronomy/Stars/Black_Holes/Supermassive/
Supermassive Black Holes
http://msowww.anu.edu.au/2dFGRS/
The 2dF Galaxy Redshift Survey
http://pegasus.phast.umass.edu/
2 Micron All Sky Survey (2MASS)
http://physicsweb.org/articles/world/13/6/3
Boomerang backs flat universe
http://newswise.com/articles/view/539256/
About a newly found midium-sized black hole in Omega Centauri
a huge 12 Gyr-old globular cluster (maybe a core of a
dwarf galaxy that the Milky Way has encountered and swallowed)
http://map.gsfc.nasa.gov
WMAP, launched in 2001, still working at the L2 point
of Sun-Earth system. Precise measurement of the
age and curvature of our world (universe), among others.
http://map.gsfc.nasa.gov/m_mm/sg_parameters1.html
WMAP and the Parameters of Cosmology
https://ned.ipac.caltech.edu/level5/Sept02/Kinney/Kinney_contents.html
A good online book about cosmology and early universe
https://arxiv.org/pdf/1411.0172
Alpher, Gamow, and the
prediction of the CMBR
https://www.ias.ac.in/public/Volumes/reso/010/12/0220-0231.pdf
And GamoW said, let there be a hot universe
http://en.wikipedia.org/wiki/BOOMERanG_experiment
Boomerang in 1998 determined the geometry of the Universe to be flat,
supporting the supernova evidence for the existence of dark energy.
http://seti.org/ligo-scientists-spy-neutron-star-smash-up-that-blew-big-bang-into-space
Gravitational wave and gamma ray burst + optical burst in NGC 4993 - two neutron stars collided!