2011A&A...530L...3O


Query : 2011A&A...530L...3O

2011A&A...530L...3O - Astronomy and Astrophysics, volume 530, L3-3 (2011/6-1)

Observation of H2O in a strongly lensed Herschel-ATLAS source at z = 2.3.

OMONT A., NERI R., COX P., LUPU R., GUELIN M., VAN DER WERF P., WEISS A., IVISON R., NEGRELLO M., LEEUW L., LEHNERT M., SMAIL I., VERMA A., BAKER A.J., BEELEN A., AGUIRRE J.E., BAES M., BERTOLDI F., CLEMENTS D.L., COORAY A., COPPIN K., DANNERBAUER H., DE ZOTTI G., DYE S., FIOLET N., FRAYER D., GAVAZZI R., HUGHES D., JARVIS M., KRIPS M., MICHALOWSKI M.J., MURPHY E.J., RIECHERS D., SERJEANT S., SWINBANK A.M., TEMI P., VACCARI M., VIEIRA J.D., AULD R., BUTTIGLIONE B., CAVA A., DARIUSH A., DUNNE L., EALES S.A., FRITZ J., GOMEZ H., IBAR E., MADDOX S., PASCALE E., POHLEN M., RIGBY E., SMITH D.J.B., BOCK J., BRADFORD C.M., GLENN J., SCOTT K.S. and ZMUIDZINAS J.

Abstract (from CDS):

The Herschel survey, H-ATLAS, with its large areal coverage, has recently discovered a number of bright, strongly lensed high-z submillimeter galaxies. The strong magnification makes it possible to study molecular species other than CO, which are otherwise difficult to observe in high-z galaxies. Among the lensed galaxies already identified by H-ATLAS, the source J090302.9-014127B (SDP.17b) at z=2.305 is remarkable because of its excitation conditions and a tentative detection of the H2O 202-111 emission line (Lupu et al., 2010, ApJ, submitted). We report observations of this line in SDP.17b using the IRAM interferometer equipped with its new 277-371GHz receivers. The H2O line is detected at a redshift of z=2.3049±0.0006, with a flux of 7.8±0.5Jy.km/s and a FWHM of 250±60km/s. The new flux is 2.4 times weaker than the previous tentative detection, although both remain marginally consistent within 1.6σ. The intrinsic line luminosity and ratio of H2O(202-111)/CO(8-7) are comparable with those of the nearby starburst/enshrouded-AGN Mrk 231, and the ratio I(H2O)/LFIR is even higher, suggesting that SDP.17b could also host a luminous AGN. The detection of a strong H2O 202-111 line in SDP.17b implies an efficient excitation mechanism of the water levels that must occur in very dense and warm interstellar gas probably similar to Mrk 231.

Abstract Copyright:

Journal keyword(s): galaxies: high-redshift - galaxies: starburst - galaxies: active - infrared: galaxies - submillimeter: galaxies - radio lines: galaxies

Simbad objects: 20

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Number of rows : 20
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024
#notes
1 NAME HXMM02 G 02 18 30.680 -05 31 31.80   25.86 25.51 24.80   ~ 17 0
2 6C 021803+354230 BLL 02 21 05.4920852208 +35 56 13.848581904   20.0 20.0 19.60   ~ 569 3
3 NAME Orion Bright Bar reg 05 35 22.30 -05 24 33.0           ~ 891 0
4 QSO J0831+5245 QSO 08 31 41.7108197808 +52 45 17.616994560   19.2   14.5 13.9 ~ 555 1
5 NAME SDP 17a G 09 03 02.9 -01 41 27           ~ 2 0
6 NAME SDP 17b G 09 03 02.9 -01 41 27           ~ 17 0
7 SDP 81 LeG 09 03 11.574 +00 39 06.55           ~ 98 0
8 SDSS J090311.57+003906.5 GiC 09 03 11.5785 +00 39 06.542           ~ 28 0
9 HerBS 59 LeG 09 13 05.0 -00 53 43           ~ 38 0
10 GAMA 3632645 gLe 09 13 05.09 -00 53 42.8           ~ 16 0
11 M 82 AGN 09 55 52.430 +69 40 46.93 9.61 9.30 8.41     ~ 5894 6
12 [VV96] J102434.5+470911 Sy1 10 24 34.5 +47 09 11     20.5     ~ 487 0
14 NAME HLock01 G 10 57 51.1 +57 30 27           ~ 40 0
15 Mrk 231 Sy1 12 56 14.2341182928 +56 52 25.238373852   14.68 13.84     ~ 2000 3
16 QSO J1415+1129 QSO 14 15 46.25 +11 29 43.4   17.63 17.23     ~ 655 0
17 NAME G15.v2.779 LeG 14 24 13.9 +02 23 04           ~ 55 0
18 IC 4553 SyG 15 34 57.22396 +23 30 11.6084   14.76 13.88     ~ 2973 4
19 [LWB2009] MM184222+593828 LeG 18 42 22.32 +59 38 29.6           ~ 21 0
20 NAME Eyelash LeG 21 35 11.60 -01 02 52.0           ~ 232 0

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