A dataset provided by the European Space Agency

Name 020334
Title OPTICALLY DARK GROUPS OF GALAXIES WITH EXTREME L_X-L_B
URL

http://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0203340101
http://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0203340301

DOI 10.5270/esa-bqgz7sl
Author Prof WILLIAM MATHEWS
Description We propose XMM observations of two remarkable ''dark.. groups of galaxies to evaluate the consequences of their extremely low star formation efficiency and the implications for galaxy formation in general. Also known as OLEGS or ''fossil groups.., they exhibit Lx, total mass, and gas mass similar to poor clusters, but optically they contain an isolated elliptical galaxy. A striking common feature is an abnormally high mass to light ratio (~500-1000). These results are however uncertain. Therefore, we have selected from the literature 2 particularly intriguing systems which have not been well-studied. We will compare their optical and X-ray properties with those of normal groups and interpret these results with gasdynamical models to obtain vital insights into galaxy-group formation.
Publication The XMM-Newton serendipitous survey. V. The Second XMM-Newton serendipitous source catalogue . Watson, M. G., Schroder, A. C., et all. . A&A . 493-339 . 2009 . 2009A&A...493..339W ,
An Extremely Luminous Panchromatic Outburst from the Nucleus of a Distant Galaxy . Levan, A. J., Tanvir, N. R., et all. . Sci . 333-199 . 2011 . 2011Sci...333..199L ,
Statistical evaluation of the flux cross-calibration of the XMM-Newton EPIC cameras . Mateos, S., Saxton, R. D., et all. . A&A . 496-879 . 2009 . 2009A&A...496..879M ,
The XMM Cluster Survey: optical analysis methodology and the first data release . Mehrtens, Nicola, Romer, A. Kathy, et all. . MNRAS . 423-1024 . 2012 . 2012MNRAS.423.1024M ,
An extension of the SHARC survey . Adami, C., Ulmer, M. P., et all. . A&A . 472-373 . 2007 . 2007A&A...472..373A ,
A serendipitous XMM survey of the SDSS: the evolution of the colour-magnitude diagram of X-ray AGN from z= 0.8 to 0.1 . Georgakakis, Antonis, Nandra, K., . MNRAS . 414-992 . 2011 . 2011MNRAS.414..992G ,
An All-Sky Atlas of Radio-X-ray Associations . Flesch, E., . PASA . 27-283 . 2010 . 2010PASA...27..283F ,
The XMM Cluster Survey: X-ray analysis methodology . Lloyd-Davies, E. J., Romer, A. Kathy, et all. . MNRAS . 418-14 . 2011 . 2011MNRAS.418...14L ,
Exospheric solar wind charge exchange as s...
Instrument EMOS1, EMOS2, EPN, RGS1, RGS2
Temporal Coverage 2005-05-04T10:17:01Z/2005-05-05T01:31:27Z
Version 17.56_20190403_1200
Mission Description The European Space Agency's (ESA) X-ray Multi-Mirror Mission (XMM-Newton) was launched by an Ariane 504 on December 10th 1999. XMM-Newton is ESA's second cornerstone of the Horizon 2000 Science Programme. It carries 3 high throughput X-ray telescopes with an unprecedented effective area, and an optical monitor, the first flown on a X-ray observatory. The large collecting area and ability to make long uninterrupted exposures provide highly sensitive observations.
Since Earth's atmosphere blocks out all X-rays, only a telescope in space can detect and study celestial X-ray sources. The XMM-Newton mission is helping scientists to solve a number of cosmic mysteries, ranging from the enigmatic black holes to the origins of the Universe itself. Observing time on XMM-Newton is being made available to the scientific community, applying for observational periods on a competitive basis.
Creator Contact https://www.cosmos.esa.int/web/xmm-newton/xmm-newton-helpdesk
Date Published 2006-06-15T00:00:00Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2006-06-15T00:00:00Z, 020334, 17.56_20190403_1200. https://doi.org/10.5270/esa-bqgz7sl