Discovery of a massive X-ray luminous galaxy cluster at <i>z</i>=1.579

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dc.contributor.authorSantos, J. S.
dc.contributor.authorFassbender, R.
dc.contributor.authorNastasi, A.
dc.contributor.authorBoehringer, H.
dc.contributor.authorRosati, P.
dc.contributor.authorSuhada, R.
dc.contributor.authorPierini, D.
dc.contributor.authorNonino, M.
dc.contributor.authorMuehlegger, M.
dc.contributor.authorQuintana, H.
dc.contributor.authorSchwope, A. D.
dc.contributor.authorLamer, G.
dc.contributor.authorde Hoon, A.
dc.contributor.authorStrazzullo, V.
dc.date.accessioned2025-01-21T00:00:47Z
dc.date.available2025-01-21T00:00:47Z
dc.date.issued2011
dc.description.abstractWe report on the discovery of a very distant galaxy cluster serendipitously detected in the archive of the XMM-Newton mission, within the scope of the XMM-Newton Distant Cluster Project (XDCP). XMMUJ0044.0-2033 was detected at a high significance level (5 sigma) as a compact, but significantly extended source in the X-ray data, with a soft-band flux f(r < 40 '') = (1.5 +/- 0.3) x 10(-14) erg s(-1) cm(2). Optical/NIR follow-up observations confirmed the presence of an overdensity of red galaxies matching the X-ray emission. The cluster was spectroscopically confirmed to be at z = 1.579 using ground-based VLT/FORS2 spectroscopy. The analysis of the I-H colour-magnitude diagram shows a sequence of red galaxies with a colour range [3.7 < I-H < 4.6] within 1' from the cluster X-ray emission peak. However, the three spectroscopic members (all with complex morphology) have significantly bluer colours relative to the observed red-sequence. In addition, two of the three cluster members have [OII] emission, indicative of on-going star formation. Using the spectroscopic redshift we estimated the X-ray bolometric luminosity, L-bol,L-40 '' similar to 5.8 x 10(44) erg s(-1), implying a massive galaxy cluster. This places XMMU J0044.0-2033 at the forefront of massive distant clusters, closing the gap between lower redshift systems and recently discovered proto-and low-mass clusters at z > 1.6.
dc.fuente.origenWOS
dc.identifier.doi10.1051/0004-6361/201117190
dc.identifier.eissn1432-0746
dc.identifier.issn0004-6361
dc.identifier.urihttps://doi.org/10.1051/0004-6361/201117190
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/95357
dc.identifier.wosidWOS:000293017700186
dc.language.isoen
dc.revistaAstronomy & astrophysics
dc.rightsacceso restringido
dc.subjectgalaxies: clusters: individual: XMMUJ0044.0-2033
dc.subjectgalaxies: high-redshift
dc.subjectX-rays: galaxies: clusters
dc.titleDiscovery of a massive X-ray luminous galaxy cluster at <i>z</i>=1.579
dc.typeartículo
dc.volumen531
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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