Latest
Fe IX, X 171-E
image from the NASA/ESA SOHO spacecraft's Extreme ultraviolet Imaging
Telescope (EIT) (NASA Goddard Space Flight Center) Latest Fe XII 195-E image from SOHO/EIT (NASA GSFC) Latest Fe XV 284-A image from SOHO/EIT (NASA GSFC) Latest He II 304-A image from SOHO/EIT (NASA GSFC) Latest Yokoh spacecraft Soft X-ray Telescope image

Latest Photospheric magnetogram from National Solar  
 Observatory, Kitt Peak, Arizona Latest He I 10830-A spectroheliogram from National Solar
 Observatory, Kitt Peak, Arizona Latest Ca II 8542 E magnetogram from National Solar   
 Observatory, Kitt Peak, Arizona Latest White-light Mk. 4 coronameter image from the High
 Altitude Observatory Mauna Loa Solar Observatory, Hawaii Latest visible-light continuum image from the SOHO
 spacecraft

(Above) Latest solar images, from various telescopes and spacecraft. Click on them for more detail.


PHYS 150 Astrophysics
WTh 17:30-18:45 in McLane 167
2001 Fall Class Syllabus: Please read carefully
Instructor: Dr. Ringwald
E-mail: ringwald[at]csufresno.edu and replace [at] with @
Phone: 278-8426
Office: McLane Hall 11, in the new `J' wing
Office hours: MWF 1-3 and by appointment

Course description (from the CSUFresno 2001-2002 General Catalog):
(3 credits) Prerequisites: MATH 75 and PHYS 2A and 2B or 4A, 4B, and 4C. Introduction to celestial mechanics, spectral classification, stellar atmospheres and interiors, star formation and evolution, variable stars, neutron stars, pulsars, black holes, the nature of galaxies, and the expansion of the Universe.

Required text: An Introduction to Modern Astrophysics, by B. W. Carroll and D. A. Ostlie (1996), which I'll call BOB (the big orange book)
Highly recommended: The Physical Universe, by Frank Shu (1982). This would have been the text, but it's too out of date.
Also: Used Math, for the first two years of college science (2nd ed.), by Clifford E. Swartz (1993). All science majors should have this.
Recommended if you want to participate in research: Cataclysmic Variable Stars, by Coel Hellier (2001).
If you want to be a professional astronomer or scientist in any other field: A Ph.D. is Not Enough, by Peter J. Feibelman (1993).

TENTATIVE list of chapters to be covered (updated 2001 November 18):
Week
Dates
Chapter
1 8/29-30 1, 2 (skip 1.3 & 2.4) Introduction; Celestial Mechanics
2 9/5-6 2, 3 The Continuous Spectrum of Light
3 9/12-13 3, 4 Special Relativity
4 9/19-20 5 Light and Matter
5 9/26-27 6 Telescopes
6 10/3-4 7 Binary Stars and Stellar Parameters; Review
7 10/10 1-6 Mid-Term Exam 1: Wednesday, October 10
7 10/11 8.2-8.3 The Classification of Stellar Spectra (Thursday)
8 10/17-18 8.1, 8.4, 9 Spectral line formation; Stellar Atmospheres
9 10/24-25 9.4, 10.1-10.2 Line broadening; Stellar interiors
10 10/31-11/1 10.3, 11 Nuclear Energy Generation; The Sun
11 11/7-8 12 The Process of Star Formation
12 11/14-15 13 Post-Main-Sequence Stellar Evolution; Paper titles and summaries due, Thursday, November 15
13 11/21-22 - Holidays: November 21-22
14 11/28 7-13 Take-Home Mid-Term Exam 2 due, Wednesday, November 28
14 11/28-29 14.1-14.2, 15 (skip 15.5); 16 Stellar Pulsation; The Degenerate Remnants of Stars; Black Holes
15 12/5-6 17; 23.1, 25.1-25.3 Close Binary Star Systems; The Nature of Galaxies, the Structure of the Universe
16 12/12-13 27, 28 Cosmology; The Early Universe Paper due on last day of instruction, Wednesday, December 12

Class objectives:
1) To introduce physicists to interesting problems
2) To provide teachers with "whys" for their introductory astronomy classes
3) To prepare astronomers (professional and amateur) for the research problems of the future

There are no computing prerequisites or lab for this course, so the emphasis will be on pencil-and-paper theory. It is OK to use Mathematica for this, although we will not cover Mathematica in PHYS 150. It is OK to use any of the computer projects in the text as one third of the class paper: in these cases, the write-up need only be 1400 words long. PHYS 150 students are encouraged to get some observing experience, with PSCI 21 (Elementary Astronomy) class and the Central Valley Astronomers. Opportunities for this will be announced throughout the semester.

Grades will be done on a curve, calculated from the following percentages:
25% Homework. Sorry, but no late assignments will be accepted.
15% Mid-Term Exam 1 (in class, closed book and closed notes, on Wednesday, October 10)
15% Mid-Term Exam 2 (take-home, due Wednesday, November 28)
5% Paper titles and summaries (100-250 words long, due Thursday, November 15)
20% Paper (over 2100 words long, due on the last day of instruction, Wednesday, December 12)
20% Final Exam (in class, open book & notes: Wednesday, December 19, 8-10 p.m. in McLane 167)

Sorry, but I don't give make-up exams. If you must be absent, the exam grade will be voided and the remainder of the grade counted as 100%.

Class web page: http://zimmer.csufresno.edu/~fringwal/phys150.html

The Department of Physics cooperates with the Services for Students with Disabilities (SSD) to make reasonable accommodations for qualified students with physical, perceptual, or learning disabilities (cf. Americans with Disabilities Act and Section of 504, Rehabilitation Act). Students with disabilities should present their written accommodation request to Dr. Ringwald within the first two weeks of class.


  • Research Papers: Writing is a key skill for everyone. No scientific investigation is complete until it becomes known to the world. Scientists do this by writing papers and publishing them. Too many important scientific discoveries have been ignored for years because the scientists did a poor job of writing up the results, in ways that other people could understand.

    I will therefore assign a paper, over 2100 words long, due on the last day of instruction. Since I take this so seriously, I personally read and grade every one, so make them good!

    Twenty-one hundred words isn't much. I want these papers to be well-thought-out, polished, beautiful little gems, not big loads of ore. It will help to focus on a specific topic. A 2100-word paper titled "Stars" can't be very good; stars are complex, and whole books have been written about them. A 2100-word paper on star formation would be a little better, but still, star formation is a vast topic in itself. More like it would be a 2100-word paper on the youngest protostars (also called Class 0).

    As another example, a 2100-word paper on "Black Holes" is unlikely to be anything but superficial: whole books have been published on black holes. Pick one black hole, such as the one in V404 Cygni or M87; or pick some aspect of black holes, such as why we think they exist, or how they can evaporate, or how they might be gateways to other Universes.

    As yet another example, a 2100-word paper on the Sun would not do our magnificent star justice. A 2100-word paper on the solar neutrino problem probably wouldn't work, either. What might work would be a 2100-word paper on the recent discovery of neutrino mass with the Super-Kamiokande detector, and its implications for the solar neutrino problem, or on just one of the many amazing observational results from the SOHO spacecraft, such as the discoveries of how the corona is heated, flare-induced Sun-quakes, or rivers or tornados on the Sun: no kidding!

    For ideas, see the text, including chapters we haven't yet read, as well as current and back issues of reputable popular magazines such as Sky & Telescope, Astronomy, Mercury, Scientific American, and New Scientist. Articles in these magazines are what your papers should be like.

    Feel free to use the World Wide Web for research, too, but be careful of what you use, since there's a great deal of rubbish on the web. When using the web for research, be sure as always to reference your sources, by listing their web addresses, also called URLs. Because everything on the web is subject to change without notice, it is also essential to list the date that appears on the page to indicate when it was last updated, as in the above example. If no such date appears on the page, list the version number appearing on the page. If there is no version number, then list the date you consulted the page.

    Having something to say in your paper is essential. How you write it is also important: good content is so much better if it's written in a way that's clear and easy to understand. For hints on writing, see The Elements of Style, by W. B. Strunk and E. B. White. This little book can be ordered from the campus bookstore for $6.95. There is now an online version, too. Read it from cover to cover twice a year, for life!

    These papers may be on any topic in contemporary or historical astronomy, space exploration, or related sciences. A typed (or computer printed) paper title and short summary (between 100 and 250 words) is due on Thursday, November 15. You're allowed to change your topic after this if you discover something better: this is something I like particularly about science.

    Papers must be typed (or computer printed), on standard 8.5-inch x 11-inch paper with standard, one-inch margins. Use a readable 12-point serif font such as Times or Computer Modern Roman—not Chicago, Helvetica, Monaco, or Geneva, which are sans serif and hard to read in large doses.

    These papers must provide a list of references, or works cited. Not doing so can turn an "A" paper into a "B" paper. There must be at least five references. No more than two of these five can web addresses. You may use more references than this required minimum: indeed, if you want an A, you should have substantially more.

    Here are some useful ways to list references:

    Knowing how the references were used is also important. You should therefore cite references in the text, especially when making statements of fact that aren't well-known or immediately obvious. Give the author's name and the year of publication, so your reader can easily match up the statements with the references. Here are three different examples of how to cite references in the text:

    Here, Smith (1993) and Horne (1994) were journal articles, but Warner (1995) was a book. Note that with the case of Horne (1994), one can put the author's name into the sentence, useful for emphasizing that Horne did this work.

    You need not use this exact format for citing references, but do use a format precise enough so that I can look the references up myself. I get frustrated whenever a student writes something interesting, but gives a reference that's so imprecise, I can't find out more about it!

    Here are some other tips on writing:

    This is how I grade papers:

  • I will allow students to collaborate with each other on homework and lab assignments, provided everyone lists their "co-investigators" on their papers. Scientists often do this, and the ability to collaborate well and work as part of a team is a good skill to have, in many professions.

    However, if you do collaborate, it must be genuine collaboration: not one person doing all the work, and the others blindly copying. That's cheating! Therefore, while you may work together, write up the results separately, in your own words. A dead giveaway is when I get two papers that are exactly the same. Do people think I don't notice it?

  • Plagiarism: I like even less when students take papers from the Internet, and turn them in as their own work. This is now easy for professors to detect, with www.plagiarism.org. If I find a paper or web page anywhere that closely resembles yours, that web page had better have your name on it. If it doesn't, your turning it in with your name on it will be interpreted as an attempt to misrepresent someone else's work as your own, which constitutes plagiarism. Remember, always: you are responsible for anything with your name on it.

    Modifying someone else's paper slightly, or changing the words around, or stringing someone else's paragraphs together, even if they're cited, is no better: none of these dubious practices make it your paper. For information on the University's policy regarding cheating and plagiarism, refer to the Schedule of Courses (Legal Notices on Cheating and Plagiarism) or the University Catalog (Policies and Regulations).

    To prevent plagiarism, two copies of both the paper titles and summaries and the papers themselves are due, on the appropriate dates (November 15 for the titles and summaries, and December 12 for the papers). I must have two copies, or the paper (or summary) gets an F. I will keep one of the copies of these papers and summaries on file, for life. If I find a plagiarized paper, the student will receive an F for the entire course. I may also send the plagiarized paper to the Dean and other university authorities (e.g. coaches) and recommend the student be expelled from the University—or the degree be revoked, if I don't find it until 10 years from now. Do NOT plagiarize!

  • This syllabus and schedule are subject to change in the event of extenuating circumstances, such as poor weather. If you are absent from class, it is your responsibility to check on announcements made while you were absent.


    Go to Dr. Ringwald's home page

    Last updated 2002 March 29. Web page by Dr. Ringwald (ringwald[at]csufresno.edu and replace [at] with @)
    Department of Physics, California State University, Fresno