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Title:
Early science with the Large Millimeter Telescope: observations of extremely luminous high-z sources identified by Planck
Authors:
Harrington, K. C.; Yun, Min S.; Cybulski, R.; Wilson, G. W.; Aretxaga, I.; Chavez, M.; De la Luz, V.; Erickson, N.; Ferrusca, D.; Gallup, A. D.; Hughes, D. H.; Montaña, A.; Narayanan, G.; Sánchez-Argüelles, D.; Schloerb, F. P.; Souccar, K.; Terlevich, E.; Terlevich, R.; Zeballos, M.; Zavala, J. A.
Affiliation:
AA(Department of Astronomy, University of Massachusetts, Amherst, MA 01003, USA ), AB(Department of Astronomy, University of Massachusetts, Amherst, MA 01003, USA), AC(Department of Astronomy, University of Massachusetts, Amherst, MA 01003, USA), AD(Department of Astronomy, University of Massachusetts, Amherst, MA 01003, USA), AE(Instituto Nacional de Astrofísica, Óptica y Electrónica, Tonantzintla, 72840 Puebla, México), AF(Instituto Nacional de Astrofísica, Óptica y Electrónica, Tonantzintla, 72840 Puebla, México), AG(SCiESMEX, Instituto de Geofísica, Unidad Michoacán, Universidad Nacional Autónoma de México, CP 58190 Morelia, Michoacán, México), AH(Department of Astronomy, University of Massachusetts, Amherst, MA 01003, USA), AI(Instituto Nacional de Astrofísica, Óptica y Electrónica, Tonantzintla, 72840 Puebla, México), AJ(Department of Astronomy, University of Massachusetts, Amherst, MA 01003, USA), AK(Instituto Nacional de Astrofísica, Óptica y Electrónica, Tonantzintla, 72840 Puebla, México), AL(Instituto Nacional de Astrofísica, Óptica y Electrónica, Tonantzintla, 72840 Puebla, México; Consejo Nacional de Ciencia y Tecnología, Av. Insurgentes Sur 1582, Col. Crédito Constructor, Del. Benito Juárez, CP 03940 México, D.F., México), AM(Department of Astronomy, University of Massachusetts, Amherst, MA 01003, USA), AN(Instituto Nacional de Astrofísica, Óptica y Electrónica, Tonantzintla, 72840 Puebla, México), AO(Department of Astronomy, University of Massachusetts, Amherst, MA 01003, USA), AP(Department of Astronomy, University of Massachusetts, Amherst, MA 01003, USA), AQ(Instituto Nacional de Astrofísica, Óptica y Electrónica, Tonantzintla, 72840 Puebla, México), AR(Instituto Nacional de Astrofísica, Óptica y Electrónica, Tonantzintla, 72840 Puebla, México; Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA, UK), AS(Instituto Nacional de Astrofísica, Óptica y Electrónica, Tonantzintla, 72840 Puebla, México), AT(Instituto Nacional de Astrofísica, Óptica y Electrónica, Tonantzintla, 72840 Puebla, México)
Publication:
Monthly Notices of the Royal Astronomical Society, Volume 458, Issue 4, p.4383-4399 (MNRAS Homepage)
Publication Date:
06/2016
Origin:
OUP
Astronomy Keywords:
gravitational lensing: strong, galaxies: high-redshift, galaxies: ISM, galaxies: starburst, infrared: galaxies, submillimetre: galaxies
Abstract Copyright:
2016 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society
DOI:
10.1093/mnras/stw614
Bibliographic Code:
2016MNRAS.458.4383H

Abstract

We present 8.5 arcsec resolution 1.1-mm continuum imaging and CO spectroscopic redshift measurements of eight extremely bright submillimetre galaxies identified from the Planck and Herschel surveys, taken with the Large Millimeter Telescope's AzTEC and Redshift Search Receiver instruments. We compiled a candidate list of high-redshift galaxies by cross-correlating the Planck Surveyor mission's highest frequency channel (857 GHz, full width at half-maximum = 4.5 arcmin) with the archival Herschel Spectral and Photometric Imaging Receiver imaging data, and requiring the presence of a unique, single Herschel counterpart within the 150-arcsec search radius of the Planck source positions with 350-mum flux density larger than 100 mJy, excluding known blazars and foreground galaxies. All eight candidate objects observed are detected in 1.1 mm continuum by AzTEC bolometer camera, and at least one CO line is detected in all cases with a spectroscopic redshift between 1.3 < zCO < 3.3. Their infrared (IR) spectral energy distributions (SEDs) mapped using the Herschel and AzTEC photometry are consistent with cold dust emission with characteristic temperature between Td = 43 and 84 K. With apparent IR luminosity of up to LIR = 3 × 1014mu-1 L&sun;, they are some of the most luminous galaxies ever found (with yet unknown gravitational magnification factor mu). The analysis of their SEDs suggests that star formation is powering the bulk of their extremely large IR luminosities. Derived molecular gas masses of M_{H_2}=(0.6-7.8)× 10^{11} M_{odot } (for mu ≈ 10) also make them some of the most gas-rich high-redshift galaxies ever detected.
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