2011ApJ...726L..22F

Query : 2011ApJ...726L..22F

2011ApJ...726L..22F - Astrophys. J., 726, L22 (2011/January-2)

Green Bank Telescope Zpectrometer CO(1-0) observations of the strongly lensed submillimeter galaxies from the Herschel ATLAS.

FRAYER D.T., HARRIS A.I., BAKER A.J., IVISON R.J., SMAIL I., NEGRELLO M., MADDALENA R., ARETXAGA I., BAES M., BIRKINSHAW M., BONFIELD D.G., BURGARELLA D., BUTTIGLIONE S., CAVA A., CLEMENTS D.L., COORAY A., DANNERBAUER H., DARIUSH A., DE ZOTTI G., DUNLOP J.S., DUNNE L., DYE S., EALES S., FRITZ J., GONZALEZ-NUEVO J., HERRANZ D., HOPWOOD R., HUGHES D.H., IBAR E., JARVIS M.J., LAGACHE G., LEEUW L.L., LOPEZ-CANIEGO M., MADDOX S., MICHALOWSKI M.J., OMONT A., POHLEN M., RIGBY E., RODIGHIERO G., SCOTT D., SERJEANT S., SMITH D.J.B., SWINBANK A.M., TEMI P., THOMPSON M.A., VALTCHANOV I., VAN DER WERF P.P. and VERMA A.

Abstract (from CDS):

The Herschel Astrophysical Terahertz Large Area Survey (H-ATLAS) has uncovered a population of strongly lensed submillimeter galaxies (SMGs). The Zpectrometer instrument on the Green Bank Telescope (GBT) was used to measure the redshifts and constrain the masses of the cold molecular gas reservoirs for two candidate high-redshift lensed sources. We derive CO(1-0) redshifts of z = 3.042±0.001 and z = 2.625±0.001, and measure molecular gas masses of (1-3) x1010 M☉, corrected for lens amplification and assuming a conversion factor of α = 0.8 M☉( K.km/s.pc2)–1. We find typical L(IR)/L'(CO) ratios of 120±40 and 140±50 L☉( K .km/s.pc2)–1, which are consistent with those found for local ultraluminous infrared galaxies (ULIRGs) and other high-redshift SMGs. From analysis of published data, we find no evidence for enhanced L(IR)/L'(CO(1-0)) ratios for the SMG population in comparison to local ULIRGs. The GBT results highlight the power of using the CO lines to derive blind redshifts, which is challenging for the SMGs at optical wavelengths given their high obscuration.

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Journal keyword(s): galaxies: evolution - galaxies: formation - galaxies: individual (SDP.81: H-ATLAS J090311.6+003906, SDP.130: H-ATLAS J091305.0-005343) - galaxies: starburst

Simbad objects: 7

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Number of rows : 7
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 SDP 81 LeG 09 03 11.574 +00 39 06.55           ~ 106 0
2 SDSS J090311.57+003906.5 GiC 09 03 11.5785 +00 39 06.542           ~ 30 0
3 HerBS 59 LeG 09 13 05.0 -00 53 43           ~ 40 0
4 GAMA 3632645 gLe 09 13 05.09 -00 53 42.8           ~ 17 0
5 3C 286 Sy1 13 31 08.2883506368 +30 30 32.960091564   17.51 17.25     ~ 4558 2
6 IC 1127 SyG 15 34 57.22396 +23 30 11.6084   14.76 13.88     ~ 3090 4
7 NAME Eyelash LeG 21 35 11.60 -01 02 52.0           ~ 245 0

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