2015A&A...581A.105C


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.03CEST21:45:41

2015A&A...581A.105C - Astronomy and Astrophysics, volume 581A, 105-105 (2015/9-1)

Planck's dusty GEMS: The brightest gravitationally lensed galaxies discovered with the Planck all-sky survey.

CANAMERAS R., NESVADBA N.P.H., GUERY D., McKENZIE T., KOENIG S., PETITPAS G., DOLE H., FRYE B., FLORES-CACHO I., MONTIER L., NEGRELLO M., BEELEN A., BOONE F., DICKEN D., LAGACHE G., LE FLOC'H E., ALTIERI B., BETHERMIN M., CHARY R., DE ZOTTI G., GIARD M., KNEISSL R., KRIPS M., MALHOTRA S., MARTINACHE C., OMONT A., POINTECOUTEAU E., PUGET J.-L., SCOTT D., SOUCAIL G., VALTCHANOV I., WELIKALA N. and YAN L.

Abstract (from CDS):

We present an analysis of CO spectroscopy and infrared-to-millimetre dust photometry of 11 exceptionally bright far-infrared (FIR) and sub-mm sources discovered through a combination of the Planck all-sky survey and follow-up Herschel-SPIRE imaging - ``Planck's Dusty Gravitationally Enhanced subMillimetre Sources''. Each source has a secure spectroscopic redshift z=2.2-3.6 from multiple lines obtained through a blind redshift search with EMIR at the IRAM 30-m telescope. Interferometry was obtained at IRAM and the SMA, and along with optical/near-infrared imaging obtained at the CFHT and the VLT reveal morphologies consistent with strongly gravitationally lensed sources, including several giant arcs. Additional photometry was obtained with JCMT/SCUBA-2 and IRAM/GISMO at 850µm and 2mm, respectively. The SEDs of our sources peak near either the 350µm or 500µm bands of SPIRE with peak flux densities between 0.35 and 1.14Jy. All objects are extremely bright isolated point sources in the 18'' beam of SPIRE at 250µm, with apparent FIR luminosities of up to 3x1014L (not correcting for the lensing effect). Their morphologies, sizes, CO line widths, CO luminosities, dust temperatures, and FIR luminosities provide additional empirical evidence that these are amongst the brightest strongly gravitationally lensed high-redshift galaxies on the sub-mm sky. Our programme extends the successful wide-area searches for strongly gravitationally lensed high-redshift galaxies (carried out with the South Pole Telescope and Herschel) towards even brighter sources, which are so rare that their systematic identification requires a genuine all-sky survey like Planck. Six sources are above the ≃600mJy 90% completeness limit of the Planck catalogue of compact sources (PCCS) at 545 and 857GHz, which implies that these must literally be amongst the brightest high-redshift FIR and sub-mm sources on the extragalactic sky. We discuss their dust masses and temperatures, and use additional WISE 22-µm photometry and template fitting to rule out a significant contribution of AGN heating to the total infrared luminosity. Six sources are detected in FIRST at 1.4GHz, and the others have sensitive upper limits. Four have flux densities brighter than expected from the local FIR-radio correlation, but in the range previously found for high-z sub-mm galaxies, one has a deficit of FIR emission, and 6 are consistent with the local correlation, although this includes 3 galaxies with upper limits. We attribute this to the turbulent interstellar medium of these galaxies, rather than the presence of radio AGN. The global dust-to-gas ratios and star-formation efficiencies of our sources are predominantly in the range expected from massive, metal-rich, intense, high-redshift starbursts. An extensive multi-wavelength follow-up programme is being carried out to further characterize these sources and the intense star formation within them.

Abstract Copyright:

Journal keyword(s): galaxies: high-redshift - galaxies: star formation - galaxies: starburst - submillimeter: galaxies - gravitational lensing: strong - galaxies: formation

Nomenclature: Table 1: <%M [CNG2015] PLCK GLLL.l+BB.b] N=11.

Simbad objects: 17

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Number of rows : 17

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 QSO J0831+5245 QSO 08 31 41.7095363198 +52 45 17.620340544   19.2   14.5 13.9 ~ 488 1
2 ACO 773 ClG 09 17 51.3 +51 43 20           ~ 261 0
3 [CRR2012] HLS J091828.6+514223 G 09 18 28.60 +51 42 23.3           ~ 30 0
4 [CNG2015] PLCK G200.6+46.1 LeG 09 32 23.67 +27 25 00.0           ~ 3 0
5 [CNG2015] PLCK G145.2+50.9 LeG 10 53 22.56 +60 51 49.0           ~ 6 0
6 [CNG2015] PLCK G244.8+54.9 LeG 10 53 53.04 +05 56 21.0           ~ 7 0
7 [CNG2015] PLCK G165.7+67.0 LeG 11 27 14.60 +42 28 25.0           ~ 7 0
8 [CNG2015] PLCK G231.3+72.2 LeG 11 39 21.60 +20 24 53.0           ~ 3 0
9 NAME G12.v2.30 G 11 46 37.9 -00 11 32           ~ 28 0
10 [CNG2015] PLCK G138.6+62.0 LeG 12 02 07.68 +53 34 40.0           ~ 3 0
11 [CNG2015] PLCK G113.7+61.0 LeG 13 23 02.88 +55 36 01.0           ~ 3 0
12 [CNG2015] PLCK G102.1+53.6 LeG 14 29 17.98 +59 21 09.0           ~ 3 0
13 [CNG2015] PLCK G045.1+61.1 LeG 15 02 36.04 +29 20 51.0           ~ 5 0
14 [CNG2015] PLCK G080.2+49.8 LeG 15 44 32.40 +50 23 46.0           ~ 4 0
15 [CNG2015] PLCK G092.5+42.9 LeG 16 09 17.76 +60 45 21.0           ~ 4 0
16 NAME Eyelash LeG 21 35 11.60 -01 02 52.0           ~ 183 0
17 NGC 7252 IG 22 20 44.7751096408 -24 40 41.905677809 12.26 12.46 12.06 11.57   ~ 662 1

    Equat.    Gal    SGal    Ecl

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2020.07.03-21:45:41

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