Spitzer Imaging of Herschel Lensed Sub-mm Galaxies

Cooray, Asantha, Wardlow, Julie, Kim, Sam, Khostovan, Ali, Mitchell-Wynne, Ketron, Barton, Elizabeth, Gong, Yan, Amblard, Alexandre, Serra, Paolo, Cooke, Jeff, Riechers, Dominik, Dominic, Benford, Frayer, David, Gardner, Jonathan, Fu, Hai, Bussmann, Shane, Gurwell, Mark, Leeuw, Lerothodi, Pasquale, Temi, Conley, Alex, Bock, Jamie, Vieira, Joaquin, Bridge, Carrie, Glenn, Jason, Zemcov, Michael, Schulz, Bernhard, Shupe, David, Hopwood, Ros, Negrello, Mattia, Andreani, Paola, Clements, David, Dannerbauer, Helmut, de Zotti, Gianfranco, Dunne, Loretta, Dunlop, James, Eales, Stephen Anthony ORCID: https://orcid.org/0000-0002-7394-426X, Farrah, Duncan, Ivison, Rob, Jarvis, Matt, Maddox, Steve, Michalowski, Michal, Omont, Alain, Perez-Fournon, Ismael, Rigopoulou, Dimitra, Serjeant, Stephen, Smail, Ian, Thompson, Mark, Vaccari, Mattia, Verma, Aprajita, Coppin, Kirsten, Oliver, Seb and Wang, Lingyu 2011. Spitzer Imaging of Herschel Lensed Sub-mm Galaxies. Presented at: Spitzer Proposal ID #80156, May 2011.

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Abstract

Sub-millimeter surveys have, in the last decade, revealed an unexpected population of high-redshift dust-obscured sub-mm galaxies (SMGs) which are forming stars at a tremendous rate. Due to steep number counts and the negative k-correction at sub-mm wavelengths sub-mm surveys are effective at finding intrinsically faint, gravitationally lensed galaxies. We have now produced a reliable list of about 150 bright lensed SMGs in 200 sq. deg of the Herschel-ATLAS and HerMES (the GTO program of the SPIRE Instrument team) surveys with Herschel-SPIRE. We propose Spitzer IRAC 3.6 and 4.5 micron imaging of 122 of these gravitationally lensed SMGs. The target SMGs are selected to maximally overlap with existing and planned multi-wavelength followup programs, without duplicating existing deep IRAC data. Using the proposed Spitzer data we will: (a) Extend the SEDs of z~ 1 to 5 lensed SMGs into the near-IR regime, where derived stellar masses are more reliable than those estimated at other wavelengths alone; (b) Combine with lens models from existing and planned high-resolution sub-mm imaging (SMA, CARMA, PdBI) to map the evolution of stellar mass as a function of redshift and star-formation rate (SFR); (c) Combine with existing and planned CO and CII molecular line measurements to map the evolution of dust-to-gas and stellar-to-gas mass ratios as a function of redshift and SFR; (d) Obtain snapshot statistics on the sub-mm galaxy evolution from z of 1 to 5 as a function of stellar, dust, and gas mass to study the role of mergers and AGN contribution that may regulate the starburst phenomenon; (e) Compare our results to those from numerical simulations of high-redshift starburst galaxies to investigate the physical conditions in SMGs, and their evolutionary pathways.

Item Type:	Conference or Workshop Item (Other)
Status:	Unpublished
Schools:	Physics and Astronomy
Subjects:	Q Science > QB Astronomy
Last Modified:	20 Oct 2022 09:26
URI:	https://orca.cardiff.ac.uk/id/eprint/32024

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