Notice To Users
Gerard Williger
I have taken up an
associate professorship in the Dept. of
Physics & Astronomy
at the University of Louisville .
My new e-mail address is williger at physics dot louisville dot edu
My old e mail address of williger at physics dot louisville dot edu
may still work but can disappear at any time.
My new homepage
is here.
My office is #206 - tel. 502/852-0821, fax 502/852-0742.
I am also a visiting scientist at JHU.
Main Interests:
- Large Scale Structure
- Quasar Absorption Lines
- HeII Gunn-Peterson
Effect
- D/H in the interstellar
medium
Short CV:
Previous Employment:
- Assoc. Research
Scientist, FUSE
Group at Johns Hopkins
University,
Baltimore MD, 2001-2005
- Asst. Scientist, STIS group at NASA/GSFC, Greenbelt MD
contracted through NOAO, 1996-2001
- Post-doctoral
researcher, MPI für Astronomie,
Heidelberg, Germany, 1994-1996
- Post-doctoral
researcher, Cerro Tololo
Inter-American Observatory, La Serena, Chile, 1991-1994
Education:
Research Groups:
A popular description of some of what I do
FUSE links:
D/H
team page
D/H
target index
postscript
spectral plots for D/H FUSE programs
Recent Papers:
Coronagraphic Imaging of the
Pre-Main Sequence Stars with the HST STIS: I. The Herbig Ae Stars,
2005, ApJ, 630, 958
The
FUSE determination of a low deuterium abundance along an extended sight
line in the Galactic disk, 2005, ApJ, in press, astro-ph/0508611
The
Low-Redshift Lyman Alpha Forest toward PKS 0405-123, 2005, ApJ, in
press, astro-ph/0505586
Probing the IGM-Galaxy Connection Toward PKS 0405-123, 2005, ApJ, 629,
L25, astro-ph/0507621
The
D/H Ratio toward PG0038+199, 2005, ApJ, 625, 210, astro-ph/0501320
The Distribution of
Lyman Alpha-Emitting Galaxies at z=2.38: Paper 2, Spectroscopy, 2004,
ApJ, 614, 75, astro-ph/0406413
The
Environment of the Optically Brightest Herbig Ae Star, HD 104237, 2004,
ApJ, 608, 809
Two
New Low Galactic D/H Measurements from FUSE, ApJ, 609, 838,
astro-ph/0403606
Cold,
Neutral, Low-Metallicity Gas Clouds in a Galaxy Proto-Cluster at
Redshift 2.38, 2004, ApJ, 602, L77, astro-ph/0401257
A
Study of the Reionization History of Intergalactic Helium with FUSE and
VLT, 2004, ApJ, 605, 631, astro-ph/0311279
The
Distribution of Lyman Alpha-Emitting Galaxies at z=2.3, 2004, ApJ, 602,
545 astro-ph/0311279
related
ASTRONOMY PICTURE OF THE DAY, 20 Jan 2004
related
NY Times article
related
space.com
related
Associated Press
related
Reuters story
related
Universe Today
related
Funneled Web
Large
Scale Structure at z=1.2 Outlined by MgII Absorbers, 2002, ApJ, 578,
708, astro-ph/0111135
The
Heavy Element Enrichment of Ly-alpha Clouds in the Virgo Supercluster,
2002, ApJ, 575, 697, astro-ph/0204204
STIS
Observations of HeII Gunn-Peterson Absorption Toward HE 2347-4342,
2002, ApJ, 564, 542, astro-ph/0012193
The
Proximity Effect in a Close Group of QSOs, 2001, MNRAS, 328, 653,
astro-ph/0108239
A
Pair of Compact Red Galaxies at Redshift 2.38, Immersed in a 100 kpc
Scale Ly-a Nebula, 2001, ApJ, 554, 1001, astro-ph/0102263
The
Hubble Deep Field: Formulation of the Observing Campaign, 2000, AJ,
120, 2735
Wide
Field Imaging of the Hubble Deep Field--South Region: Quasar
Candidates, 2000, ApJ, 541, 61, astro-ph/0005068
STIS
Observations of HeII Gunn-Peterson Absorption Toward Q0302-003, 2000,
ApJ, 534, 69, astro-ph/9812429
summary of AAS
press release Jan 1999
Large-scale
structure in the Lyman Alpha forest II: analysis of a group of ten
QSOs, 2000, MNRAS, 311, 657, astro-ph/9910407
Large
Scale Structure in the Lyman Alpha Forest, 2000, ApJ, 532, 77,
astro-ph/9910369
Recent Conference Proceedings:
Lyman-Alpha
Blobs in a Filament at z=2.38, BAAS, 203.8909
Teaching:
An introductory solar
system course I co-taught with Tom Brown in 1997 and 1999 at Loyola
College, Baltimore
Why astronomers go to
observatories:
Reflections on
Procrustes and Antaeus
Popular articles about
the above discovery abound. Try the 22 Jan 2001 issue of Newsweek,
or:
New York
Times article
BBC piece
Der
Spiegel
or make a search for "williger" and "astronomy"
Image of part of Large Quasar Group (16 Mb):
CTIO
Big Throughput Camera image (30x30 arcmin) courtesy of Chris Haines
A typical galaxy which might be found in the LQG:
NGC
4254, from the Frei & Gunn Galaxy Catalogue
Frei, Z., in Astrophys. & Space Sci (1999),
269/270, 649:
Frei
& Gunn Galaxy Catalogue
Other links:
Mars' close
approach on 27 Aug 2003
A
popular description of the National Virtual Observatory
A
popular description of the Virgo Consortium
news about black holes
The Perseids Meteor Shower (every August):
Perseids
Show 11-13 Aug 2004
Popular Astronomy:
A "Movie"
of Hubble Space Telescope photos
Perseids, Aquarids 2003
The Pecking Order of Astronomers
The
Leonids Meteor Shower (every November ~19):
space.com Leonids 2003
NASA
Leonids 2004 Page
Interesting
links:
QuasarChile (tours in Chile with
astronomy)
Astronomy
Picture of the Day
HEASARC
Picture of the Week
Particle Physics
Picture of the Week
Physics
News Update
SETI
home
The Moon
ISS transits the Moon
Thoughts
of lunar missions in 1903
Useful data
AMDG