An AzTEC 1.1mm Survey of a Highly-biased Extragalactic Field - Tracing Accelerated Galaxy Formation at z~3.8 towards 4C41.17

Hughes, David, Ade, Peter A. R. ORCID: https://orcid.org/0000-0002-5127-0401, Aretxaga, I., Austermann, J., Bock, J. J., Dunlop, J., Gaztanagal, E., Ivison, R., Kang, Y., Kim, S., Lowenthal, J., Mauskopf, Philip ORCID: https://orcid.org/0000-0001-6397-5516, Montana, A., Plionis, M., Scott, K., Smail, I, Stevens, J., Wagg, J., Wilson, G. and Yun, M. 2007. An AzTEC 1.1mm Survey of a Highly-biased Extragalactic Field - Tracing Accelerated Galaxy Formation at z~3.8 towards 4C41.17. Presented at: 2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #95.03, Seattle, WA, USA, 5-10 January 2007.

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Abstract

Aztec has recently conducted a sensitive, wide-area (300 sq. arcmin's) continuum survey at 1.1mm using the 15-m James Clerk Maxwell Telescope towards 4C41.17, a powerful high-redshift (z 3.8) radio galaxy. These Aztec data, which cover an area >40 times larger than our previous SCUBA survey, reveal a significant over-density of luminous, massive dust-enshrouded galaxies, compared to the results from lower-redshift blank-field sub-mm surveys. One natural interpretation of these new AzTEC data is that the over-density is tracing a large (5 x 5 Mpc) "proto-cluster" structure at z 3.8 associated with the environment of 4C41.17, within which the formation of ultra-luminous starburst galaxies (with rest-frame FIR luminosities >5 x 10^12 Lsun or SFRs > 500 Msun/yr) is taking place at an accelerated rate. Proving the physical association of these massive optically-faint starbursts with the environment of this high-z AGN, and not with the blank-field sub-mm population, for which 50% of the population lies at 1.9 < z < 2.9, remains an outstanding problem. In this presentation we will describe the AzTEC survey, the empirical evidence for this protocluster structure in the early universe, and the planned multi-wavelength follow-up observations of the brightest AzTEC sources towards 4C41.17 that may demonstrate that we are witnessing accelerated galaxy formation, via an increased rate of merging gas-rich galaxies within a rapidly-developing gravitational potential. AzTEC is one of the suite of instruments destined for the 50-m Large Millimeter Telescope (LMT). We will conclude this presentation with a summary of future LMT observations that will trace the evolution of obscured starformation in the dynamic environments towards a significant sample of intermediate and high-z powerful AGN with greater sensitivity and spatial resolution.

Item Type:	Conference or Workshop Item (Paper)
Date Type:	Completion
Status:	Unpublished
Schools:	Physics and Astronomy
Subjects:	Q Science > QB Astronomy
Last Modified:	21 Oct 2022 10:11
URI:	https://orca.cardiff.ac.uk/id/eprint/39362

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