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:

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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NOAO is operated by the Association of Universities for Research in Astronomy (AURA), Inc. under cooperative agreement with the National Science Foundation
Posted: 5 November 2010