2006A&A...459..415L


C.D.S. - SIMBAD4 rel 1.7 - 2021.03.01CET09:35:56

2006A&A...459..415L - Astronomy and Astrophysics, volume 459, 415-422 (2006/11-4)

Discovery of a cluster of galaxies behind the Milky Way: X-ray and optical observations.

LOPES DE OLIVEIRA R., LIMA NETO G.B., MENDES DE OLIVEIRA C., JANOT-PACHECO E. and MOTCH C.

Abstract (from CDS):

We report the discovery of Cl 2334+48, a rich cluster of galaxies in the Zone of Avoidance, identified in public images from the XMM-Newton archive. We present the main properties of this cluster using the XMM-Newton X-ray data, along with new optical spectroscopic and photometric observations. ClG J2334+4851{Cl 2334+48} is located at z=0.271±0.001, as derived from the optical spectrum of the brightest member galaxy. Such redshift agrees with a determination from the X-ray spectrum (z=0.263+0.012–0.010), in which an intense emission line is matched to the rest wavelength of the Fe Kα complex. Its intracluster medium has a plasma temperature of 4.92+0.50–0.48keV, a sub-solar abundance of 0.38±0.12Z, and a bolometric luminosity of 3.2x1044erg/s. A density contrast δ=2500 is reached in a radius of 0.5h70–1Mpc, and the corresponding enclosed mass is 1.5x1014M. Optical images show an enhancement of g'-i'>2.5 galaxies around the central galaxy, as expected if these were cluster members. The central object is a luminous E-type galaxy, which is displaced ∼40h70–1kpc from the cluster X-ray centre. In addition, it has a neighbouring arc-like feature (∼22" or 90h70–1kpc from it), probably due to strong gravitational lensing. The discovery of Cl 2334+48 emphasises the remarkable capability of the XMM-Newton to reveal new clusters of galaxies in the Zone of Avoidance.

Abstract Copyright:

Journal keyword(s): galaxies: clusters: individual: XMMU J233402.7+485108 - galaxies: intergalactic medium - X-ray: galaxies: clusters

Nomenclature: Text: [LLM2006] Cl JHHMM+DD N=1. Paragr. 6: [LLM2006] JHHMMSS.s+DDMMSS.s N=1.

Simbad objects: 8

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Number of rows : 8

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 * kap Per PM* 03 09 29.7715574 +44 51 27.146337 5.62 4.79 3.81 3.07 2.57 G9.5IIIb 227 0
2 NAME Great Attractor SCG 10 32 -46.0           ~ 476 0
3 ACO 1068 ClG 10 40 47.1 +39 57 19           ~ 189 0
4 NAME SHAPLEY-CENTAURUS CL SCG 13 06.0 -33 04           ~ 515 0
5 XMMU J183225.4-103645 X 18 32 25.4 -10 36 45           ~ 4 0
6 V* Z And Sy* 23 33 39.9551345051 +48 49 05.973842875 8.86 9.35 8.00     M2III+B1eq 505 0
7 ClG J2334+4851 ClG 23 34 02.7 +48 51 08           ~ 6 1
8 2MASX J23340317+4851093 GiC 23 34 03.171 +48 51 09.37           ~ 2 1

    Equat.    Gal    SGal    Ecl

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2021.03.01-09:35:56

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