2017A&A...608A..48D


Query : 2017A&A...608A..48D

2017A&A...608A..48D - Astronomy and Astrophysics, volume 608A, 48-48 (2017/12-1)

The implications of the surprising existence of a large, massive CO disk in a distant protocluster.

DANNERBAUER H., LEHNERT M.D., EMONTS B., ZIEGLER B., ALTIERI B., DE BREUCK C., HATCH N., KODAMA T., KOYAMA Y., KURK J.D., MATIZ T., MILEY G., NARAYANAN D., NORRIS R.P., OVERZIER R., ROTTGERING H.J.A., SARGENT M., SEYMOUR N., TANAKA M., VALTCHANOV I. and WYLEZALEK D.

Abstract (from CDS):

It is not yet known if the properties of molecular gas in distant protocluster galaxies are significantly affected by their environment as galaxies are in local clusters. Through a deep, 64 h of effective on-source integration with the Australian Telescope Compact Array (ATCA), we discovered a massive, Mmol=2.0±0.2x1011M, extended, ∼40kpc, CO(1-0)-emitting disk in the protocluster surrounding the radio galaxy, MRC 1138-262. The galaxy, at zCO=2.1478, is a clumpy, massive disk galaxy, M*∼5x1011M, which lies 250kpc in projection from MRC 1138-262 and is a known Hα emitter, named HAE229. This source has a molecular gas fraction of ∼30%. The CO emission has a kinematic gradient along its major axis, centered on the highest surface brightness rest-frame optical emission, consistent with HAE229 being a rotating disk. Surprisingly, a significant fraction of the CO emission lies outside of the UV/optical emission. In spite of this, HAE229 follows the same relation between star-formation rate and molecular gas mass as normal field galaxies. HAE229 is the first CO(1-0) detection of an ordinary, star-forming galaxy in a protocluster. We compare a sample of cluster members at z>0.4 thatare detected in low-order CO transitions, with a similar sample of sources drawn from the field. We confirm findings that the CO-luminosity and full-width at half maximum are correlated in starbursts and show that this relation is valid for normal high-z galaxies as well as for those in overdensities. We do not find a clear dichotomy in the integrated Schmidt-Kennicutt relation for protocluster and field galaxies. Our results suggest that environment does not have an impact on the "star-formation efficiency" or the molecular gas content of high-redshift galaxies. Not finding any environmental dependence in these characteristics, especially for such an extended CO disk, suggests that environmentally-specific processes such as ram pressure stripping do not operate efficiently in (proto)clusters.

Abstract Copyright: © ESO, 2017

Journal keyword(s): galaxies: clusters: individual: MRC 1138-262 - galaxies: high-redshift - galaxies: evolution - galaxies: ISM - submillimeter: galaxies - galaxies: individual: HAE229 - galaxies: individual: HAE229

VizieR on-line data: <Available at CDS (J/A+A/608/A48): list.dat HAE229_cube.fits>

Simbad objects: 33

goto Full paper

goto View the references in ADS

Number of rows : 33
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 ZwCl 0024+1652 ClG 00 26 35.6 +17 09 32     18.35     ~ 633 1
2 [ISS2013] T G 08 49 32.96 +02 14 39.7           ~ 7 0
3 H-ATLAS J084933.4+021443 G 08 49 33.49 +02 14 44.4           ~ 33 0
4 [ISS2013] W G 08 49 33.59 +02 14 44.6           ~ 7 0
5 [ISS2013] M G 08 49 33.80 +02 14 45.6           ~ 5 0
6 [ISS2013] C G 08 49 33.91 +02 14 45.0           ~ 5 0
7 [JCR2013] GAL0926+1242B G 09 26 32.050 +12 42 12.36           ~ 4 0
8 [JCR2013] GAL0926+1242A G 09 26 32.260 +12 42 11.72           ~ 3 0
9 ClG J0926+1242 ClG 09 26 36.6 +12 42 59           ~ 39 0
10 AS2COS 0059.1 AGN 10 00 20.690 +02 35 20.37           ~ 105 0
11 COSMOS J100240.81+013427.5 G 10 02 40.81 +01 34 27.5   26.049 26.311     ~ 2 0
12 COSMOS J100243.40+013433.1 G 10 02 43.40 +01 34 33.1   27.256 26.089     ~ 2 0
13 QSO B1124-186 QSO 11 27 04.39245388 -18 57 17.4418445   19.17 18.65 19.23   ~ 227 1
14 [DTD2010] MRC 1138-262 464 EmG 11 40 46.07 -26 29 11.3           ~ 16 0
15 MRC 1138-262 AGN 11 40 48.9 -26 29 09     22.00     ~ 290 1
16 QSO B1143-287 QSO 11 46 26.1888544560 -28 59 18.504579192   18.9 18.5 18.25   ~ 47 1
17 NAME SMM J123652+621225 smm 12 36 51.976 +62 12 25.80           ~ 162 0
18 [PSD2006] GN20.2a G 12 37 08.840 +62 22 02.37     25.150     ~ 44 0
19 [MOD2010] 10241 G 12 37 09.73 +62 22 02.5           ~ 19 0
20 NAME SMM J123711+622212 AGN 12 37 11.92 +62 22 12.1   27.1786 25.185   24.4196 ~ 205 0
21 GAL 309.92+00.48 HII 13 50 42.0 -61 35 09           ~ 32 0
22 [JCR2013] GAL1416+4446 G 14 16 19.524 +44 43 57.12           ~ 3 0
23 ClG J1416+4446 ClG 14 16 28.1 +44 46 38           ~ 47 0
24 [TKT2014] bHAE-191 G 16 01 11.20 -00 31 19.0           ~ 2 0
25 [TKT2014] rHAE-193 G 16 01 11.45 -00 31 19.3           ~ 2 0
26 NAME USS 1558-003 Protocluster PCG 16 01 17.0 -00 28 48           ~ 19 0
27 HS 1700+6416 QSO 17 01 00.6194059368 +64 12 09.118892376   16.39 16.17     ~ 368 0
28 [PSL2007] Q1700-DRG55 G 17 01 19.37 +64 14 37.7           ~ 4 0
29 [GSS2010] Cl1756.10 G 17 56 55.750 +65 19 07.00           ~ 5 0
30 NVSS J175705+651953 rG 17 57 05.5 +65 19 54           ~ 29 2
31 ICRF J193925.0-634245 Sy2 19 39 25.0245304992 -63 42 45.640373400   18.87 18.37 17.64   ~ 1213 1
32 [DNM2003] J2330+3927 c ? 23 30 24.70 +39 27 08.9           ~ 3 0
33 6C 232758+390950 EmG 23 30 24.94 +39 27 12.0   24.70 23.97     ~ 54 2

To bookmark this query, right click on this link: simbad:objects in 2017A&A...608A..48D and select 'bookmark this link' or equivalent in the popup menu