Harvard-Smithsonian Center for Astrophysics

Galaxies and the Universe

A Harvard Freshman Seminar (21x, Catalog #4075), Fall Term 2007/8.

The seminar generally will meet from 2:00-5:00 P.M. on Mondays in the Pratt Conference room at the Observatory (60 Garden Street, up near the Radcliffe Quad). Occasionally we may meet at other locations depending on time and schedule --- warning, I may have to go to telescopes in stange places at strange times, one of the hazards of being an observational astronomer! The first offical meeting of this seminar for the fall of 2007/8 will be on Monday, September 17th, also in Pratt.

Description

PROF. JOHN P. HUCHRA will offer a seminar on Galaxies and the Universe. The seminar will discuss the interplay between observation and theory and the evolution of astronomers' views of the universe with our improved ability to view it. Topics covered will include the internal structure and dynamics of galaxies, cosmological models, the determination of the cosmic distance scale, observations of large-scale structure in the universe, galaxy formation, and the age, size and fate of the universe. We will explore the basic observations that lend support to our current cosmological model, the inflationary Hot Big Bang and we will discuss the recent observations that indicate that the Universe might even be speeding up. The seminar will use the book Cosmology by Michael Rowan-Robinson, 4th edition, (Oxford University Press, ISBN 0 19 852747 0). I suggest purchasing on one of the discount textbook websites noted on my site.

Readings will also be taken from introductory and popular texts such as An Introduction to Galaxies & Cosmology by Jones & Lambourne, The Big Bang by J. Silk, and An Introduction to Modern Cosmology by A. Liddle, and also from current popular articles. Students will participate in small research projects using a variety of datasets and images of galaxies or catalogs of galaxy properties to measure simple properties of galaxies and clusters of galaxies. We'll also try to do some observing with Harvard's local telescopes. Considerable information on modern cosmology can also be found on the web. A good starter site is NASA's:

  • Universe: Cosmology 101
  • The goals of this seminar are to acquaint students with

    (1) What galaxies are,

    (2) What observational astrophysics is,

    (3) What the current cosmological model is, and

    (4) How observations of galaxies are used both to ``measure'' the universe and to test cosmological theories.

    The seminar is intended to give students a general overview of extragalactic astronomy with particular emphasis on the concept of using observations (experiments) to test and constrain theories. In the course of the seminar, we will cover some basic physical concepts such as the Virial Theorem and gravitational binding energy, we will discuss the concept of infinity and we will touch on black holes and quasars. This is an astronomical introduction to the scientific method.

    The first few discussions will center on the philosophy of astronomical observations (as opposed to laboratory experimentation), and discussions of what exactly galaxies are and why they are important in both the study of humankind's place in the universe and our study {\it of} the universe including simple cosmological theories. Discussions during the middle of the term will cover current observational work on the measurement of the cosmic distance scale, the mass density of the universe, the rate at which the universe is slowing down and the age of the universe. The seminar will close with discussions of advanced topics such as galaxy formation, large scale structure in the universe, and the eventual fate of the universe.

    Near the middle of the term, you wil be given small projects to work on, primarily involving computers to analyse data on galaxies. These will include using software packages to determine surface brightness and color profiles for galaxies from digital images and to study the dynamical properties of a few clusters of galaxies to determine their masses. The students will do these in groups of 3 or 4 with the aid of the instructor.

    Reading assignments will be made each week, usually from the assigned books or from popular (Scientific American level) articles. Students will (weather permitting) do some observing at either the Science Center or Harvard ollege Observatory. I also will invite guests from the CfA staff who have special interests in the topics covered.

    The seminar requirements will be attendance and class participation, a writeup of the research projects, and a final short essay on one of the general topics covered in the seminar. Most of the books and materials needed for this seminar are easily available at the Harvard COOP or on Amazon.com.

    Reading Resource List (Useful books to peruse if found! **note: not required reading***)

    ***Tentative*** Meeting Schedule

    The ``Galaxies and the Universe'' seminar will be held at the Observatory in the Pratt Conference Room (ground floor of the Perkin Lab at 60 Garden Street). The usual meeting time will be Monday afternoons , but because of scheduling constraints, some meetings will be on Fridays or other days by arrangement. Starting time will be 2:30 P.M. for the first week, but may be shifted by agreement. The First meeting is MONDAY, SEPTEMBER 17TH, 2007 at 2:30 P.M. We will adjust Monday meeting time after that. We will be reading from An Introduction to Galaxies and Cosmology by Mark H. Jones and Robert J. A. Lambourne and other material.

    Sept 17 --- M --- Introduction, Basics of Astronomy and Cosmology

    Sept 24 --- M --- The Milky Way

    Oct 3 --- W --- What are Galaxies Made of? (Note day change, Phillips Auditorium)

    Oct 8 --- M --- Columbus Day --- no class

    Oct 15 --- M --- Cosmological Models

    Oct 22 --- M --- The Hot Big Bang

    Oct 29 --- M --- Galaxy Clustering, Project Discussions

    Nov 5 --- M --- The Scale of the Universe

    Nov 12 --- M --- Veteran's Day --- no class

    Nov 19 --- M --- Galaxy Formation

    Nov 26 --- M --- The Universe's Contents: Dark Matter, Dark Energy

    Dec 3 --- M --- The Age and Fate of the Universe

    Dec 10 --- M --- Unanswered Questions --- JPH

    Dec 17 --- M --- Project Presentation/Wrapup

  •         Meet to discuss progress on Projects as needed

    Scientfic American articles are available either on-line through Harvard's Hollis subscription (for more recent articles) or at the Science Library.

    Office Hours by Appointment. Call 495-7375 for an appointment.

    Prof. John Huchra, Observatory P-309, 60 Garden Street, Cambridge, MA 02138

    617-496-1481 and 617-495-7375, huchra@cfa.harvard.edu

    Projects

  • The Motion of the Milky Way
  • The Virgo Cluster and Cosmology
  • Measuring the Hubble Constant from Galaxy Properties
  • Mapping the Local Group and the Very Nearby Universe
  • The Properties of Clusters of Galaxies
  • Mass versus Size for Galaxy Groups
  • The Properties Galaxies as a Function of Location
  • The Properties of the Local Supercluster of Galaxies as Determined from the 2MRS Survey

    Various Utilities are available for use for the seminar, including a routine called ``getimage'' which will allow you to created images of galaxies from the POSS image server using the IDL routine "makeps" to make postscript files, and the Supermongo package, for making plots.

    Here are links to Useful Unix Primers

    Here is a quick tutorial for the emacs editor (unix, linux): EMACS Tutorial

    And here is the working fortran program: read.f

    Back to JPH's website.

    FAS Seminar Link

    Faculty Seminar Link

    FAS 21x. Link




    John P. Huchra <huchra@cfa.harvard.edu>