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

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

2006-06-15

arxiv.org/abs/astro-ph/0606384v2

Astronomy and Astrophysics

Astrophysics

9 pages, 11 figures, Accepted for publication in A&A (on July 12, 2006)

Scientific paper

10.1051/0004-6361:20065681

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. 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 Kalpha complex. Its intracluster medium has a plasma temperature of 4.92 (+0.50/-0.48) keV, sub-solar abundance (0.38 +/- 0.12 Zsun), and a bolometric luminosity of 3.2 x 10^44 erg/s. A density contrast delta = 2500 is obtained in a radius of 0.5 Mpc/h70, and the corresponding enclosed mass is 1.5 x 10^14 Msun. 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 ~ 40 kpc/h70 from the cluster X-ray center. In addition, it has a neighbouring arc-like feature (~ 22" or 90 kpc/h70 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.

Affiliated with

Also associated with

No associations

Rating

Discovery of a cluster of galaxies behind the Milky Way: X-ray and optical observations does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Discovery of a cluster of galaxies behind the Milky Way: X-ray and optical observations, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Discovery of a cluster of galaxies behind the Milky Way: X-ray and optical observations will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-606033