SIMBAD references

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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2019.12.10-20:15:35

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