2019A&A...624A.138Y


C.D.S. - SIMBAD4 rel 1.7 - 2020.10.19CEST18:42:44

2019A&A...624A.138Y - Astronomy and Astrophysics, volume 624A, 138-138 (2019/4-1)

CO, H2O, H2O+ line and dust emission in a z = 3.63 strongly lensed starburst merger at sub-kiloparsec scales.

YANG C., GAVAZZI R., BEELEN A., COX P., OMONT A., LEHNERT M.D., GAO Y., IVISON R.J., SWINBANK A.M., BARCOS-MUNOZ L., NERI R., COORAY A., DYE S., EALES S., FU H., GONZALEZ-ALFONSO E., IBAR E., MICHALOWSKI M.J., NAYYERI H., NEGRELLO M., NIGHTINGALE J., PEREZ-FOURNON I., RIECHERS D.A., SMAIL I. and VAN DER WERF P.

Abstract (from CDS):

Using the Atacama Large Millimeter/submillimeter Array (ALMA), we report high angular-resolution observations of the redshift z=3.63 galaxy H-ATLAS J083051.0+013224 (G09v1.97), one of the most luminous strongly lensed galaxies discovered by the Herschel-Astrophysical Terahertz Large Area Survey (H-ATLAS). We present 0.2"-0.4" resolution images of the rest-frame 188 and 419 µm dust continuum and the CO(6-5), H2O(211-202), and Jup=2H2O+ line emission. We also report the detection of H2O(211-202) in this source. The dust continuum and molecular gas emission are resolved into a nearly complete ∼1.5" diameter Einstein ring plus a weaker image in the center, which is caused by a special dual deflector lensing configuration. The observed line profiles of the CO(6-5), H2O(211-202), and Jup=2H2O+ lines are strikingly similar. In the source plane, we reconstruct the dust continuum images and the spectral cubes of the CO, H2O, and H2O+ line emission at sub-kiloparsec scales. The reconstructed dust emission in the source plane is dominated by a compact disk with an effective radius of 0.7±0.1kpc plus an overlapping extended disk with a radius twice as large. While the average magnification for the dust continuum is µ∼10-11, the magnification of the line emission varies from 5 to 22 across different velocity components. The line emission of CO(6-5), H2O(211-202), and H2O+ have similar spatial and kinematic distributions. The molecular gas and dust content reveal that G09v1.97 is a gas-rich major merger in its pre-coalescence phase, with a total molecular gas mass of ∼1011M. Both of the merging companions are intrinsically ultra-luminous infrared galaxies (ULIRGs) with infrared luminosities LIR reaching ≥4x1012L, and the total LIR of G09v1.97 is (1.4±0.7)x1013L. The approaching southern galaxy (dominating from V=-400 to -150km/s relative to the systemic velocity) shows no obvious kinematic structure with a semi-major half-light radius of as=0.4kpc, while the receding galaxy (0 to 350km/s) resembles an as=1.2kpc rotating disk. The two galaxies are separated by a projected distance of 1.3kpc, bridged by weak line emission (-150 to 0km/s) that is co-spatially located with the cold dust emission peak, suggesting a large amount of cold interstellar medium (ISM) in the interacting region. As one of the most luminous star-forming dusty high-redshift galaxies, G09v1.97 is an exceptional source for understanding the ISM in gas-rich starbursting major merging systems at high redshift.

Abstract Copyright: © ESO 2019

Journal keyword(s): galaxies: high-redshift - galaxies: ISM - gravitational lensing: strong - submillimeter: galaxies - radio lines: ISM - ISM: molecules

VizieR on-line data: <Available at CDS (J/A+A/624/A138): list.dat fits/*>

Simbad objects: 22

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Number of rows : 22

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 IC 1623 IG 01 07 47.2 -17 30 25   15       ~ 262 1
2 2HERMES S250 J043657.7-543810 G 04 36 57.7 -54 38 10           ~ 8 0
3 QSO B0507+179 QSO 05 10 02.36912982 +18 00 41.5816534   20.0 19.0 19.09   ~ 319 1
4 QSO B0736+01 QSO 07 39 18.03389693 +01 37 04.6178588   16.90 16.47 16.19   ~ 627 1
5 QSO B0748+126 QSO 07 50 52.0457430 +12 31 04.828260   17.67 17.28 17.16   ~ 282 1
6 QSO B0823+033 BLL 08 25 50.33835429 +03 09 24.5200730   17.81 17.23 16.91   ~ 295 1
7 NAME G09v1.97 G 08 30 51.0 +01 32 24           ~ 16 0
8 QSO J0831+5245 QSO 08 31 41.7095363198 +52 45 17.620340544   19.2   14.5 13.9 ~ 493 1
9 [VV98] J083949.6+010428 QSO 08 39 49.6109066240 +01 04 26.744687490   19.63 19.09 18.56   ~ 63 1
10 QSO J0854+2006 BLL 08 54 48.8749311881 +20 06 30.642936668   15.91 15.43 15.56   ~ 2022 1
11 SDP 81 G 09 03 11.574 +00 39 06.55           ~ 84 0
12 [CRR2012] HLS J091828.6+514223 G 09 18 28.60 +51 42 23.3           ~ 31 0
13 NGC 4038 GiP 12 01 53.002 -18 52 03.32   10.91   9.74 11.0 ~ 1278 1
14 NAME Antennae IG 12 01 53.170 -18 52 37.92           ~ 1562 0
15 NGC 4355 Sy2 12 26 54.628 -00 52 39.51   14.21 13.37     ~ 413 2
16 Mrk 231 Sy1 12 56 14.2340989340 +56 52 25.238555193   14.68 13.84     ~ 1791 3
17 NAME NCv1.143 G 12 56 32.544 +23 36 27.63           ~ 12 0
18 NAME G15.v2.779 G 14 24 13.9 +02 23 04           ~ 42 0
19 Z 49-57 GiC 15 13 13.1 +07 13 32   15.5       ~ 209 1
20 IC 4553 SyG 15 34 57.22396 +23 30 11.6084   14.76 13.88     ~ 2701 4
21 NAME HFLS 3 G 17 06 47.8 +58 46 23           ~ 103 0
22 NAME Eyelash LeG 21 35 11.60 -01 02 52.0           ~ 186 0

    Equat.    Gal    SGal    Ecl

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2020.10.19-18:42:44

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