2014A&A...572A..41L


C.D.S. - SIMBAD4 rel 1.7 - 2019.10.22CEST17:13:07

2014A&A...572A..41L - Astronomy and Astrophysics, volume 572A, 41-41 (2014/12-1)

VIMOS Ultra-Deep Survey (VUDS): Witnessing the assembly of a massive cluster at z ∼ 3.3.

LEMAUX B.C., CUCCIATI O., TASCA L.A.M., LE FEVRE O., ZAMORANI G., CASSATA P., GARILLI B., LE BRUN V., MACCAGNI D., PENTERICCI L., THOMAS R., VANZELLA E., ZUCCA E., AMORIN R., BARDELLI S., CAPAK P., CASSARA L.P., CASTELLANO M., CIMATTI A., CUBY J.G., DE LA TORRE S., DURKALEC A., FONTANA A., GIAVALISCO M., GRAZIAN A., HATHI N.P., ILBERT O., MOREAU C., PALTANI S., RIBEIRO B., SALVATO M., SCHAERER D., SCODEGGIO M., SOMMARIVA V., TALIA M., TANIGUCHI Y., TRESSE L., VERGANI D., WANG P.W., CHARLOT S., CONTINI T., FOTOPOULOU S., GAL R.R., KOCEVSKI D.D., LOPEZ-SANJUAN C., LUBIN L.M., MELLIER Y., SADIBEKOVA T. and SCOVILLE N.

Abstract (from CDS):

Using new spectroscopic observations obtained as part of the VIMOS Ultra-Deep Survey (VUDS), we performed a systematic search for overdense environments in the early universe (z>2) and report here on the discovery of ClJ0227-0421, a massive protocluster at z=3.29. This protocluster is characterized by both the large overdensity of spectroscopically confirmed members, δgal=10.5±2.8, and a significant overdensity in photometric redshift members. The halo mass of this protocluster is estimated by a variety of methods to be ∼3x1014M at z∼3.3, which, evolved to z=0 results in a halo mass rivaling or exceeding that of the Coma cluster. The properties of 19 spectroscopically confirmed member galaxies are compared with a large sample of VUDS/VVDS galaxies in lower density field environments at similar redshifts. We find tentative evidence for an excess of redder, brighter, and more massive galaxies within the confines of the protocluster relative to the field population, which suggests that we may be observing the beginning of environmentally induced quenching. The properties of these galaxies are investigated, including a discussion of the brightest protocluster galaxy, which appears to be undergoing vigorous coeval nuclear and starburst activity. The remaining member galaxies appear to have characteristics that are largely similar to the field population. Though we find weaker evidence of the suppression of the median star formation rates among and differences in the stacked spectra of member galaxies with respect to the field, we defer any conclusions about these trends to future work with the ensemble of protostructures that are found in the full VUDS sample.

Abstract Copyright:

Journal keyword(s): galaxies: evolution - galaxies: high-redshift - galaxies: active - galaxies: clusters: general - techniques: spectroscopic - techniques: photometric

VizieR on-line data: <Available at CDS (J/A+A/572/A41): specmem.dat>

Simbad objects: 29

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Number of rows : 29

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2019
#notes
1 VVDS 020461765 QSO 02 26 35.9 -04 23 22   24.623 23.012 22.870 22.893 ~ 5 0
2 VVDS 520339056 G 02 26 38.0546 -04 23 38.245           ~ 1 0
3 VVDS 910267754 G 02 26 41.5056 -04 22 46.891           ~ 1 0
4 VVDS 910278842 G 02 26 47.0887 -04 21 18.132           ~ 1 0
5 VVDS 520392469 G 02 26 48.9715 -04 18 12.647           ~ 1 0
6 VVDS 520384288 G 02 26 51.9581 -04 19 00.930           ~ 1 0
7 VVDS 520396373 G 02 26 53.1324 -04 17 47.864           ~ 1 0
8 VVDS 520340483 G 02 26 55.7362 -04 23 30.293           ~ 1 0
9 VVDS 520306104 G 02 26 57.1577 -04 27 00.846           ~ 1 0
10 VVDS 020461498 G 02 26 57.4925 -04 23 40.009     24.962 24.096 23.898 ~ 2 0
11 VVDS 520394030 G 02 26 58.9483 -04 18 00.846           ~ 1 0
12 VVDS 020467962 QSO 02 26 59.2 -04 16 56   25.219 23.960 23.798 23.588 ~ 5 0
13 ClG J0227-0421 ClG 02 27.0 -04 21           ~ 2 0
14 VVDS 520364676 G 02 27 00.1610 -04 20 59.453           ~ 1 0
15 VVDS 520333162 G 02 27 00.5810 -04 24 12.636           ~ 1 0
16 VVDS 520361492 G 02 27 01.1611 -04 21 20.002           ~ 1 0
17 VVDS J022701.22-042104.3 G 02 27 01.2290 -04 21 04.393   24.653 23.768 23.826 23.388 ~ 3 0
18 VVDS 520350375 G 02 27 01.9186 -04 22 28.852           ~ 1 0
19 VVDS 520321970 G 02 27 03.8304 -04 25 23.974           ~ 1 0
20 VVDS J022704.42-042708.8 G 02 27 04.4251 -04 27 08.840   24.891 24.137 24.462 23.837 ~ 2 0
21 3XMM J022706.4-041924 QSO 02 27 06.437 -04 19 24.87   21.769 21.313 20.988 21.090 ~ 10 0
22 VVDS 520371040 G 02 27 08.8171 -04 20 19.860           ~ 1 0
23 VVDS 520345491 G 02 27 10.1820 -04 22 59.657           ~ 1 0
24 VVDS 910259897 G 02 27 12.3499 -04 23 51.301           ~ 1 0
25 VVDS J022722.25-041737.5 G 02 27 22.2523 -04 17 37.579   25.158 24.181 23.885 23.688 ~ 2 0
26 VVDS 020312124 G 02 27 23.0808 -04 18 41.271   25.498 24.146 24.057 23.573 ~ 3 0
27 NAME Extended Chandra Deep Field South reg 03 32 30.0 -27 48 20           ~ 586 0
28 NAME COSMOS Field reg 10 00 28.60 +02 12 21.0           ~ 1883 0
29 ACO 1656 ClG 12 59 48.7 +27 58 50           ~ 4096 2

    Equat.    Gal    SGal    Ecl

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2019.10.22-17:13:07

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