Buell T. Jannuzi
Astronomer, NOAO Scientific Staff
Areas of Interest
Observational
Cosmology, Quasar Absorption Line Systems, Active Galaxies,
Instrumentation for Surveys
Current Research
My current research activities are mainly in two areas: 1) studies of
the properties of the inter-galactic medium and the gaseous content of
the Universe as probes of the formation and evolution of structure in
the Universe, and 2) studies of galaxies and large scale structure at
redshifts between one and four as traced by the distribution of
individual, groups, and clusters of galaxies. I also continue to be
involved in studies of various classes of active galaxies.
Lyman-alpha absorbers are observable from redshifts of zero to over
4,
spanning most of the age of the Universe. Understanding how they
relate to large scale structures at low redshift will facilitate using
studies of absorbers to understand the formation and evolution of
structure in the Universe. As a member of the Quasar Absorption Line
Key Project Team, a group of researchers
that used the Faint Object Spectrograph of the Hubble Space Telescope
to obtain ultra-violet spectra of quasars during the first four cycles
of HST operations, I led the construction of our catalog of absorption
line systems. The large and homogeneous catalogue of low redshift
absorbers that resulted from this work
(Jannuzi et al. 1998,
ApJS, 118, p1) is being used for a wide variety of studies. Results
include evidence for clustering of some low redshift
Lyman-alpha absorbers near metal line systems (Jannuzi 1998, in
Proceedings of the 13th IAP Astrophysics Colloquium: Structure and
Evolution of the Intergalactic Medium From QSO Absorption Line
Systems, edited by P. Petitjean and S. Charlot (Editions Frontier:
Paris) p. 93) and for a change in the nature of the evolution of the
number of these systems as a function of redshift from near the
beginning of the Universe (z=4.5) to the present (z=0)
(Weymann et
al. 1998, ApJ, 506, p.1).
I am co-PI, together with Arjun Dey, of the NOAO Deep Wide-Field
Survey, a deep optical (Bw,R,I) and near-infrared
(J,H,K) imaging survey that will sample the sky in two 9 square
degree patches. The survey is designed
to:
- Investigate the existence and evolution of large scale
structures at redshifts z>1 as sampled by a diverse set of objects.
- Provide the astronomical community a sensitive
multicolor-database of objects from which samples may be selected for
other interesting problems.
- Furnish a database of interesting objects that can be
investigated spectroscopically with the Gemini telescopes.
Further details and status updates can be found on the NOAO Deep
Wide-Field Survey Web page.
Mosaic 1.1
I've been helping at a minor level with the
testing/commissioning of the upgraded Mosaic 1.0, now Mosaic 1.1, with
a new controller and detectors. Check out
the Mosaic 1.1 Project
team's web page for information on the upgrade
project. Updated general pages about the performance of the
instrument are in preparation.
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Universities for Research in Astronomy (AURA), Inc. under
cooperative agreement with the National
Science Foundation
Posted: 5 November 2010