2010A&A...514A..77J


Query : 2010A&A...514A..77J

2010A&A...514A..77J - Astronomy and Astrophysics, volume 514, A77-77 (2010/5-1)

Submillimeter galaxies behind the Bullet cluster (1E 0657-56).

JOHANSSON D., HORELLOU C., SOMMER M.W., BASU K., BERTOLDI F., BIRKINSHAW M., LANCASTER K., LOPEZ-CRUZ O. and QUINTANA H.

Abstract (from CDS):

Clusters of galaxies are effective gravitational lenses able to magnify background galaxies and making it possible to probe the fainter part of the galaxy population. Submillimeter galaxies, which are believed to be star-forming galaxies at typical redshifts of 2 to 3, are a major contaminant to the extended Sunyaev-Zeldovich (SZ) signal of galaxy clusters. For a proper quantification of the SZ signal the contribution of submillimeter galaxies needs to be quantified. The aims of this study are to identify submillimeter sources in the field of the Bullet cluster (1E 0657-56), a massive cluster of galaxies at z≃0.3, measure their flux densities at 870µm, and search for counterparts at other wavelengths to constrain their properties. We carried out deep observations of the submillimeter continuum emission at 870µm using the Large APEX BOlometer CAmera (LABOCA) on the Atacama Pathfinder EXperiment (APEX) telescope. Several numerical techniques were used to quantify the noise properties of the data and extract sources. In total, seventeen sources were found. Thirteen of them lie in the central 10-arcmin of the map, which has a pixel sensitivity of 1.2mJy per 22'' beam. After correction for flux boosting and gravitational lensing, the number counts are consistent with published submm measurements. Nine of the sources have infrared counterparts in Spitzer maps. The strongest submm detection coincides with a source previously reported at other wavelengths, at an estimated redshift z≃2.7. If the submm flux arises from two images of a galaxy magnified by a total factor of 75, as models have suggested, its intrinsic flux would be around 0.6mJy, consistent with an intrinsic luminosity below 1012L.

Abstract Copyright:

Journal keyword(s): galaxies: individual: MMJ065837-5557.0 - galaxies: clusters: individual: 1E 0657-56 - submillimeter: galaxies - infrared: galaxies - cosmology: observations

Nomenclature: Table 2: [JHS2010] NN (Nos 1-17).

Simbad objects: 24

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Number of rows : 24
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 NAME Extended Chandra Deep Field South reg 03 32 30.0 -27 48 20           ~ 697 0
2 ACO 478 ClG 04 13 20.7 +10 28 35           ~ 482 0
3 QSO B0537-441 BLL 05 38 50.3617339512 -44 05 08.940591924   15.77 16.48 16   ~ 829 2
4 [JHS2010] 16 smm 06 58 12.44 -55 57 29.7           ~ 1 0
5 [JHS2010] 4 smm 06 58 19.36 -55 58 30.3           ~ 1 0
6 [JHS2010] 13 smm 06 58 22.88 -56 00 40.7           ~ 1 0
7 [JHS2010] 8 smm 06 58 24.05 -55 57 23.0           ~ 1 0
8 [JHS2010] 2 smm 06 58 24.47 -55 55 12.5           ~ 1 0
9 [JHS2010] 3 smm 06 58 25.45 -55 56 40.1           ~ 1 0
10 [JHS2010] 5 smm 06 58 27.27 -56 01 16.3           ~ 1 0
11 [JHS2010] 6 smm 06 58 28.94 -55 53 48.4           ~ 1 0
12 ClG 0657-56 ClG 06 58 29.6 -55 56 39           ~ 867 1
13 [JHS2010] 15 smm 06 58 33.69 -55 54 40.8           ~ 1 0
14 [JHS2010] 1 smm 06 58 37.31 -55 57 01.5           ~ 11 2
15 NAME MIPS 065845.3-555846.5 smm 06 58 45.30 -55 58 46.5           ~ 2 0
16 [JHS2010] 14 smm 06 58 46.68 -56 02 11.8           ~ 1 0
17 [JHS2010] 12 smm 06 58 52.22 -55 55 45.7           ~ 1 0
18 [JHS2010] 11 smm 06 58 53.22 -56 00 45.0           ~ 1 0
19 [JHS2010] 9 smm 06 58 55.98 -55 56 51.7           ~ 1 0
20 [JHS2010] 7 smm 06 59 01.39 -55 52 18.1           ~ 1 0
21 [JHS2010] 17 smm 06 59 15.72 -56 01 07.5           ~ 2 0
22 ACO 2163 ClG 16 15 34.1 -06 07 26           ~ 540 0
23 ACO 2204 ClG 16 32 45.7 +05 34 43           ~ 414 0
24 ClG J2143-4423 ClG 21 43 -44.4           ~ 17 0

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2022.05.21-02:03:40

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