2010A&A...509A..54B


Query : 2010A&A...509A..54B

2010A&A...509A..54B - Astronomy and Astrophysics, volume 509, A54-54 (2010/1-1)

Radio counterpart of the lensed submm emission in the cluster MS0451.6-0305: new evidence for the merger scenario.

BERCIANO ALBA A., KOOPMANS L.V.E., GARRETT M.A., WUCKNITZ O. and LIMOUSIN M.

Abstract (from CDS):

SMM J04542-0301 is an extended (∼1') submm source located near the core of the cluster MS0451.6-0305. It has been suggested that part of its emission arises from the interaction between a LBG and two EROs at z∼2.9 that are multiply-imaged in the optical/NIR observations. However, the dramatic resolution difference between the sub-mm map and the optical/NIR images make it difficult to confirm this hypothesis. In a previous paper, we reported the detection of 1.4GHz continuum radio emission coincident with this sub-mm source using VLA archival data. To fully understand the relation between this radio emission, the sub-mm emission, and the optical/IR multiply-imaged sources, we have re-observed the cluster with the VLA at higher resolution.The previous archival data has been re-reduced and combined with the new observations to produced a deep (∼10µJy/beam), high resolution (∼2") map centred on the cluster core. The strong lensing effect in the radio data has been quantified by constructing a new lens model of the cluster.From the high resolution map we have robustly identified six radio sources located within SMM J04542-0301. The brightest and most extended of these sources (RJ) is located in the middle of the sub-mm emission, and has no obvious counterpart in the optical/NIR. Three other detections (E1, E2 and E3) seem to be associated with the images of one of the EROs (B), although the NIR and radio emission appear to originate at slightly different positions in the source plane. The last two detections (CR1 and CR2), for which no optical/NIR counterpart have been found, seem to constitute two relatively compact emitting regions embedded in a ∼5" extended radio source located at the position of the sub-mm peak. The presence of this extended component (which contributes 38% of the total radio flux in this region) can only be explained if it is being produced by a lensed region of dust obscured star formation in the center of the merger. A comparison between the radio and sub-mm data at the same resolution suggests that E1, E2, E3, CR1 and CR2 are associated with the sub-mm emission.The radio observations presented in this paper provide strong observational evidence in favour of the merger hypothesis. However, the question if RJ is also contributing to the observed sub-mm emission remains open. These results illustrate the promising prospects for radio interferometry and strong gravitational lensing to study the internal structure of SMGs.

Abstract Copyright:

Journal keyword(s): galaxies: clusters: individual: SMM J04542-0301 - galaxies: starburst - radio continuum: galaxies - galaxies: interactions - gravitational lensing: strong

Nomenclature: Fig. 4, Table 1: [BKG2010] AAN (Nos RJ, CR1-CR2, E1-E3). Fig. 5, Table 12: [BKG2010] NN (Nos 1-27).

Simbad objects: 49

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Number of rows : 49
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 3C 48 QSO 01 37 41.2996631208 +33 09 35.080388820   16.62 16.20     ~ 2717 2
2 [BGK2007] Fe Rad 04 54 09.30 -03 00 51.7           ~ 2 0
3 [BKG2010] 27 G 04 54 10.0760 -03 00 50.338         20.5351 ~ 1 0
4 [BKG2010] 26 G 04 54 10.7670 -03 01 24.772         25.2539 ~ 1 0
5 CNOC MS 0451 101234 BiC 04 54 10.84 -03 00 51.6         18.1 ~ 12 1
6 CXOU J045410.8-030125 X 04 54 10.88 -03 01 25.8           ~ 8 0
7 [BKG2010] 24 G 04 54 10.8840 -03 00 57.231         18.1360 ~ 1 0
8 ClG 0451-03 ClG 04 54 10.9 -03 01 07     20.0     ~ 345 0
9 [BKG2010] E3 Rad 04 54 10.97 -03 01 24.8           ~ 1 0
10 [BKG2010] 23 bCG 04 54 11.019 -03 01 25.68       21.95 21.4960 ~ 3 0
11 [BCD2004] ARC1 ci LeI 04 54 11.11 -03 01 26.6           ~ 5 0
12 [BKG2010] 22 G 04 54 11.3120 -03 01 01.400         20.6069 ~ 1 0
13 [BKG2010] 21 G 04 54 11.8170 -03 00 57.484         20.3933 ~ 1 0
14 [BKG2010] 20 G 04 54 11.8330 -03 00 59.879         21.1736 ~ 1 0
15 [BKG2010] 19 G 04 54 11.9620 -03 01 04.756         20.1070 ~ 1 0
16 CNOC MS 0451 101141 GiC 04 54 12.18 -03 01 00.9         19.5202 ~ 6 0
17 [BKG2010] 17 G 04 54 12.2800 -03 00 54.816         20.0471 ~ 1 0
18 [BKG2010] 16 G 04 54 12.2830 -03 00 53.001         20.3429 ~ 1 0
19 [BKG2010] 15 G 04 54 12.3340 -03 01 15.892         21.9945 ~ 1 0
20 [BKG2010] 14 G 04 54 12.44 -03 01 16.6         20.0909 ~ 2 0
21 CNOC MS 0451 101087 GiC 04 54 12.47 -03 01 07.7         19.6 ~ 7 0
22 NAME SMM J04542-0301 smm 04 54 12.5 -03 01 04           ~ 10 0
23 [BKG2010] 12 G 04 54 12.53 -03 01 04.5         22.5221 ~ 4 0
24 [BKG2010] RJ Rad 04 54 12.54 -03 01 17.2           ~ 1 0
25 [BKG2010] 11 G 04 54 12.6100 -03 01 15.312         22.1831 ~ 1 0
26 [BKG2010] 10 G 04 54 12.6340 -03 01 00.949         22.4744 ~ 1 0
27 [BKG2010] 9 G 04 54 12.6390 -03 01 04.288         20.7576 ~ 1 0
28 [BKG2010] 8 G 04 54 12.6550 -03 01 16.586         22.5806 ~ 1 0
29 [BKG2010] E2 Rad 04 54 12.66 -03 01 01.2           ~ 1 0
30 [BCD2004] B2 LeI 04 54 12.69 -03 01 01.5           ~ 6 0
31 [BKG2010] 7 G 04 54 12.6970 -03 00 54.889         20.8427 ~ 1 0
32 [BKG2010] 6 G 04 54 12.712 -03 00 41.91       23.92 22.3768 ~ 2 0
33 [BCD2004] C2 LeI 04 54 12.72 -03 00 59.6           ~ 6 0
34 [BKG2010] E1 Rad 04 54 12.78 -03 00 43.8           ~ 1 0
35 CXOU J045412.8-030047 X 04 54 12.81 -03 00 47.5           ~ 8 0
36 [BCD2004] B1 LeI 04 54 12.81 -03 00 44.4           ~ 6 0
37 [BKG2010] 5 G 04 54 12.8310 -03 01 03.476         23.2229 ~ 1 0
38 [BKG2010] 4 G 04 54 12.8550 -03 01 09.205         19.0257 ~ 1 0
39 [BKG2010] CR2 Rad 04 54 12.86 -03 00 59.3           ~ 1 0
40 [BKG2010] CR1 Rad 04 54 12.88 -03 00 53.5           ~ 1 0
41 [BKG2010] 2 G 04 54 12.8840 -03 01 01.056         20.1111 ~ 1 0
42 [BKG2010] 3 G 04 54 12.8860 -03 00 55.685         24.6286 ~ 1 0
43 [BKG2010] 1 G 04 54 12.9330 -03 00 41.494         21.9511 ~ 1 0
44 [LGH99] MS 0456.6-0305 A1 G 04 54 12.95 -03 00 54.8           ~ 8 1
45 [BGK2007] Fd Rad 04 54 15.08 -03 01 08.8           ~ 2 0
46 ICRF J050321.1+020304 Sy2 05 03 21.19716454 +02 03 04.6765714   22.500 21.350 20.682   ~ 183 1
47 ACO 1689 ClG 13 11 29.5 -01 20 28           ~ 1093 0
48 ACO 2218 ClG 16 35 54.0 +66 13 00           ~ 797 1
49 NAME SMM J16359+6613 G 16 35 55.62 +66 12 59.5           ~ 60 1

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2023.01.27-21:51:01

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