HI in the Universe (Ocasys code STHIU-09)

This course consists of 4 weeks of lectures (from 08/02/2010 until 02/3/2010 (inclusive)). The final exam will consist of a paper.
Every week there are 2 lectures: on Mondays from 13.45-15:30 (
J 5419.02161) and Tuesdays from 11.15-13:00 (J 5419.0161).


Lecture outline:


Week 1:      basic physics, determination of HI properties of

                   galaxies, overview of HI properties of galaxies

                   in relation to other global galaxy properties


Week 2:      HI as a tracer of galaxy dynamics, galaxy evolution,

                   galaxy structure, star formation          


Week 3:      HI surveys: HI properties, HI Mass Function, HI

                   properties as a function of environment


Week 4:      relevance for galaxy formation and evolution, the

                   cosmic picture, future observational capabilities


Topics in week 2-4 will be discussed on the basis of papers to be presented by the participants in the course


The final grade will be based on the paper and the presentation in class


Course material:


Introductory lecture      HI physics     Summary Lecture    



Roberts, M.S. and Haynes, M.P. Annual Review of Astronomy and Astrophysics, Volume 32, 1994, pp. 115-152. (HI properties along the Hubble sequence)

Skillman, E.D., 1996, The Minnesota lectures on extragalactic neutral hydrogen, ASP Conf. Series 106.

Swaters, R.A. 1999, PhD thesis, University of Groningen.

Noordermeer, E. 2006, PhD thesis, University of Groningen.

Verheijen, M.A.W. 1997, PhD thesis, University of Groningen.

Oosterloo, T.A. et al. 2007, A&A 465, 787 (HI in early type galaxies)

Field, G.B., 1958, ApJ 129, 536. (excitation of HI)

Week 2:

Van der Kruit, P.C. and Allen, R.J. 1978, ARA&A 16, 103.  (kinematics of spiral galaxies)

De Blok et al. 2008 AJ 136, 2648.  (THINGS, high resolution HI of 19 galaxies)

Sancisi, R. et al. 2008, A&A Reviews 15, 189 (cold gas accretion in galaxies)

Kennicutt, R.C. 1998, Ann.Rev. A&A 36, 189. (star formation in galaxies)

Leroy et al. 2008 AJ 136, 2782. (detailed comparison of HI and CO with star formation in 23 galaxies)

Week 3:

Boomsma et al.  2008, A&A 490, 555 (detailed phenomena in NGC 6946)

Koribalsky et al. 2004, AJ 128, 16 (HIPASS, properties of galaxies)

Solanes, J.M. et al. 2001, ApJ 548 97.  (HI deficiency in clusters)

Chung et al. 2009, AJ 138, 1741 (HI imaging of galaxies in Virgo)

Week 4:

Zwaan et al.  2003, AJ 125, 2842 (HIPASS HI Mass Function)

Verheijen et al. 2007, ApJ 668, L9 (imaging of HI in clusters at z = 0.2)

Van der Hulst, J.M. et al. 2004, New Astronomy Reviews 48, 1221 (Square Kilometre Array and HI)


Term Papers (hand in before 24 April 2010):

Write a term paper on the basis of literature research on any of the following topics or one of your own choosing. Structure it as a paper for the astronomical literature with an introduction giving an overview of the status of the topic and the relevant question(s) to be addressed, a section providing all the information you found that is relevant to answering the question, a section discussing the results and a section with conclusions.

Suggested subjects for term papers:

1.     Discuss the Baryonic Tully-Fisher relation

2.     Discuss the evidence for and applicability of star formation thresholds

3.     Are there and should there be any starless galaxies

4.     How well do we know HI spin temperatures

5.     Discuss the properties of the lowest HI mass galaxies

6.     Discuss the evidence for and importance of the Galactic Fountain

7.     Discuss the importance and origin of damped Ly alpha systems

8.     Discuss the possible origin and importance of warps

9.     HI and the environment: evidence and implications for galaxy evolution

10. How well do we know the global gas density in the Universe

11. Discuss the HI properties of Elliptical galaxies

12. Discuss gas removal mechanisms

13. Discuss the importance of HI for tracing gravitational interaction


J.M. van der Hulst, tel. (363)4054