2011A&A...527L..10F


C.D.S. - SIMBAD4 rel 1.7 - 2019.10.22CEST17:11:50

2011A&A...527L..10F - Astronomy and Astrophysics, volume 527, L10-10 (2011/3-1)

The X-ray luminous galaxy cluster XMMU J1007.4+1237 at z = 1.56. The dawn of starburst activity in cluster cores.

FASSBENDER R., NASTASI A., BOEHRINGER H., SUHADA R., SANTOS J.S., ROSATI P., PIERINI D., MUEHLEGGER M., QUINTANA H., SCHWOPE A.D., LAMER G., DE HOON A., KOHNERT J., PRATT G.W. and MOHR J.J.

Abstract (from CDS):

Observational galaxy cluster studies at z>1.5 probe the formation of the first massive M>1014M dark matter halos, the early thermal history of the hot ICM, and the emergence of the red-sequence population of quenched early-type galaxies. We present first results for the newly discovered X-ray luminous galaxy cluster XMMUJ1007.4+1237 at z=1.555, detected and confirmed by the XMM-Newton Distant Cluster Project (XDCP) survey. We selected the system as a serendipitous weak extended X-ray source in XMM-Newton archival data and followed it up with two-band near-infrared imaging and deep optical spectroscopy. We can establish XMMUJ1007.4+1237 as a spectroscopically confirmed, massive, bona fide galaxy cluster with a bolometric X-ray luminosity of LbolX,500≃(2.1±0.4)x1044erg/s, a red galaxy population centered on the X-ray emission, and a central radio-loud brightest cluster galaxy. However, we see evidence for the first time that the massive end of the galaxy population and the cluster red-sequence are not yet fully in place. In particular, we find ongoing starburst activity for the third ranked galaxy close to the center and another slightly fainter object. At a lookback time of 9.4Gyr, the cluster galaxy population appears to be caught in an important evolutionary phase, prior to full star-formation quenching and mass assembly in the core region. X-ray selection techniques are an efficient means of identifying and probing the most distant clusters without any prior assumptions about their galaxy content.

Abstract Copyright:

Journal keyword(s): galaxies: clusters: individual: XMMU J1007.4+1237 - X-rays: galaxies: clusters - Galaxy: evolution

Nomenclature: Text: XDCP J1007.4+1237 N=1. Fig. 1, Table 1: [FNB2011] N (Nos 1-4).

Simbad objects: 12

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Number of rows : 12

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 NAME Chandra Deep Field-South reg 03 32 28.0 -27 48 30           ~ 1750 1
2 [FNB2011] 3 G 10 07 20.80 +12 37 59.6           ~ 1 0
3 [FNB2011] 2 G 10 07 21.40 +12 38 05.1           ~ 1 0
4 NVSS J100721+123749 Rad 10 07 21.54 +12 37 49.2           ~ 1 0
5 NAME XMMU J1007.4+1237 ClG 10 07 21.60 +12 37 54.3           ~ 8 0
6 [FNB2011] 1 BiC 10 07 21.80 +12 37 51.5           ~ 1 0
7 [FNB2011] 4 G 10 07 22.90 +12 37 56.7           ~ 1 0
8 2XMM J100726.0+124856 Sy1 10 07 26.0965727406 +12 48 56.188170981   15.81 15.68     ~ 373 2
9 NAME Lockman Hole reg 10 45 00.0 +58 00 00           ~ 732 0
10 ClG J1449+0856 ClG 14 49.0 +08 56           ~ 37 0
11 ClG J2215-1738 ClG 22 15 58.5 -17 38 03           ~ 89 0
12 ClG J2235-2557 ClG 22 35 20.6 -25 57 42           ~ 135 0

    Equat.    Gal    SGal    Ecl

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2019.10.22-17:11:50

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