Evidence for a Population of High-Redshift Submillimeter Galaxies from Interferometric Imaging

By J. Younger, G. Fazio, Jia-Sheng Huang, M. Yun, G. Wilson, M. Ashby, M. Gurwell, K. Lai, A. Peck, G. Petitpas and 15 more. 2007

157 citations recorded by the source corpus.

We have used the Submillimeter Array to image a flux-limited sample of seven submillimeter galaxies, selected by the AzTEC camera on the JCMT at 1.1 mm, in the COSMOS field at 890 μ m with ~2'' resolution. All of the sources—two radio-bright and five radio-dim—are detected as single point sources at high significance (>6 σ), with positions accurate to ~0.2'' that enable counterpart identification at other wavelengths observed with similarly high angular resolution. All seven have IRAC counterparts, but only two have secure counterparts in deep HST ACS imaging. As compared to the two radio-bright sources in the sample, and those in previous studies, the five radio-dim sources in the sample (1) have systematically higher submillimeter-to-radio flux ratios, (2) have lower IRAC 3.6-8.0 μ m fluxes, and (3) are not detected at 24 μ m . These properties, combined with size constraints at 890 μ m (θ ≲ 1.2''), suggest that the radio-dim submillimeter galaxies represent a population of very dusty starbursts, with physical scales similar to local ultraluminous infrared galaxies, with an average redshift higher than radio-bright sources.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/9e7e7c11ab42a7317e9ef1c9401aee5ba3ff537b

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Astronomy and Astrophysics

In Nuclear and High Energy Physics

Citations in the corpus

IMAGING THE MOLECULAR GAS IN A SUBMILLIMETER GALAXY AT z = 4.05: COLD MODE ACCRETION OR A MAJOR MERGER? (2010, background): “Early searches for SMGs at z > 4 (Dannerbauer et al. 2002; 2004; 2008; Dunlop et al. 2004; Younger et al. 2007; 2008; Wang et al. 2007), were unsuccessful.”
A MASSIVE MOLECULAR GAS RESERVOIR IN THE z = 5.3 SUBMILLIMETER GALAXY AzTEC-3 (2010, background): “The peak position of the CO emission is consistent with that of the 890µm continuum emission (astrometric accuracy: 0.14′′; Younger et al. 2007) and the 3.6µm emission (astrometric accuracy: 0.2′′; Sanders et al. 2007) within the relative uncertainties (Fig.”
MID-INFRARED SPECTROSCOPY OF SUBMILLIMETER GALAXIES: EXTENDED STAR FORMATION IN MASSIVE HIGH-REDSHIFT GALAXIES (2009, background): “It is possible that SMGs with no detectable radio counterparts lie at significantly higher redshifts than the radio-identified population (z ≫ 3, C05; Younger et al. 2007).”
SUBMILLIMETER GALAXIES AS PROGENITORS OF COMPACT QUIESCENT GALAXIES (2014, methodology): “Taking this into account in combination with the deboosted 1.1 mm fluxes of the SMGs (see Younger et al. 2007, 2009) yields that the derived surface densities could be roughly a factor of 1.5 higher than that reported above.”
Cosmic evolution of submillimeter galaxies and their contribution to stellar mass assembly (2009, background): “Such extreme SFRs likely result from major mergers (e.g. Chapman et al., 2004; Swinbank et al., 2004; Greve et al., 2005; Tacconi et al., 2006, 2008; Younger et al., 2007, 2008; Berciano Alba et al., 2010; Narayanan et al., 2009, 2010) and cannot be sustained for a long period (after a few hundred…”
ALMA REDSHIFTS OF MILLIMETER-SELECTED GALAXIES FROM THE SPT SURVEY: THE REDSHIFT DISTRIBUTION OF DUSTY STAR-FORMING GALAXIES (2013, methodology): “Prior to ALMA this method has proven to be time-intensive, requiring entire nights of time detect a single source; the first sample detected blindly in the continuum with mm interferometry was published by Younger et al. (2007).”
The LABOCA survey of the Extended Chandra Deep Field South: A photometric redshift survey of submillimetre galaxies (2010, background): “…submillimetre interferometry have located a small number of previously unidentified SMGs (e.g. Dannerbauer et al. 2002; Wang et al. 2007; Younger et al. 2007, 2009; Dannerbauer, Walter & Morrison 2008), but the nature and redshifts of this unidentified subset of SMGs remain critical…”
Dusty Star Forming Galaxies at High Redshift (2014, methodology): “Capak et al. (2011) examined the COSMOS dataset, and found four galaxies at z ∼ 5.3, all centered around an extreme starburst originally detected with the AzTEC camera at 1.1 mm, COSMOS AzTEC-3 (Younger et al., 2007).”
Star formation in galaxy mergers with realistic models of stellar feedback and the interstellar medium (2012, background): “However, at those same redshifts, yet more luminous systems appear, including large populations of hyper-LIRGs (LIR > 1013 L ) and bright submillimetre galaxies (e.g. Chapman et al. 2005; Younger et al. 2007, 2009b; Casey et al. 2009).”
Characterization of Scuba-2 450 μm and 850 μm selected galaxies in the COSMOS field (2013, unknown): “A handful of sources in our sample (five sources at 450µm, eight at 850µm) have interferometric observations either with the SMA (Younger et al. 2007, 2009) or the Plateau de Bure Interferometer (Smolčić et al. 2012) where the counterparts to submm observations are known, but the rest of the…”
A SUBSTANTIAL POPULATION OF MASSIVE QUIESCENT GALAXIES AT z ∼ 4 FROM ZFOURGE (2013, background): “There exists a population of high-redshift submillimeter detected galaxies, including highly obscured gas-rich mergers (e.g., Younger et al. 2007), with large SFRs ( 1000 M yr−1), that could be progenitors of z ∼ 4 quiescent galaxies.”
An ALMA survey of submillimetre galaxies in the Extended Chandra Deep Field South: high-resolution 870 μm source counts (2012, background): “…imaging through interferometric observations of individual submillimetre sources (e.g., Gear et al. 2000; Lutz et al. 2001; Dannerbauer et al. 2002; Younger et al. 2008a,b; Wang et al. 2011) and (nearly) flux-limited samples (Younger et al. 2007, 2009; Smolčić et al. 2012; Barger et al. 2012).”
A Herschel view of the far-infrared properties of submillimetre galaxies (2012, background): “AzTEC sources with no LABOCA or MAMBO counterparts but with Submillimeter Array (SMA) follow-up (Younger et al. 2007, 2009) are included in our sample (i.e.,5 sources).”
MERGERS IN ΛCDM: UNCERTAINTIES IN THEORETICAL PREDICTIONS AND INTERPRETATIONS OF THE MERGER RATE (2010, background): “Likewise the number density of IR luminous systems apparently in mergers at high redshifts is so high as to yield tension with the relic bulge mass in the Universe (see e.g. Younger et al. 2007; Genel et al. 2008; Tacconi et al. 2008; Hopkins et al. 2006; Cimatti et al. 2008).”
Compact high-redshift galaxies are the cores of the most massive present-day spheroids (2009, background): “…appears to be a natural link between the observed compact red galaxies and bright submillimetre galaxies, which are intense starbursts with consistent number densities (accounting for their short duty cycles) and physical sizes (Tacconi et al. 2006; Younger et al. 2007, 2008; Cimatti et al. 2008).”
TWO BRIGHT SUBMILLIMETER GALAXIES IN A z = 4.05 PROTOCLUSTER IN GOODS-NORTH, AND ACCURATE RADIO-INFRARED PHOTOMETRIC REDSHIFTS (2008, background): “Similarly, Younger et al. (2007) recently reported on seven sources selected with the AzTEC camera at 1.1mm (Wilson et al. 2008) with flux densities above 5 mJy in the COSMOS field (Scoville et al. 2007), of which five (70”
AN ALMA SURVEY OF SUBMILLIMETER GALAXIES IN THE EXTENDED CHANDRA DEEP FIELD SOUTH: SOURCE CATALOG AND MULTIPLICITY (2013, background): “…amount of time (e.g., Gear et al. 2000; Frayer et al. 2000; Lutz et al. 2001; Dannerbauer et al. 2002; Wang et al. 2004, 2007; Iono et al. 2006; Younger et al. 2007; Dannerbauer et al. 2008; Younger et al. 2008, 2009; Aravena et al. 2010; Wang et al. 2011; Smolčić et al. 2012b; Barger et al.…”
AzTEC millimetre survey of the COSMOS field – I. Data reduction and source catalogue (2008, methodology): “…(3) S/N of the detection in the AzTEC map; (4) measured 1.1-mm flux density and error; (5) deboosted flux density and 68 per cent confidence interval (Section 5.1); (6) 890-μm flux density and error (Younger et al. 2007) and (7) probability that the source will deboost to < 0 (Section 5.1).”
WHAT DOES A SUBMILLIMETER GALAXY SELECTION ACTUALLY SELECT? THE DEPENDENCE OF SUBMILLIMETER FLUX DENSITY ON STAR FORMATION RATE AND DUST MASS (2010, background): “Since SMGs have redshifts z ∼ 1–4 (Dannerbauer et al. 2002; Chapman et al. 2005; Younger et al. 2007, 2008; Capak et al. 2008; Greve et al. 2008; Schinnerer et al. 2008; Daddi et al. 2009a, 2009b; Knudsen et al. 2010), the observed submm flux density traces rest-frame ∼150–400 μm, longward of the…”