Proposal ID | 050248 |
Title | An Unbiased Sample of Local Elliptical Galaxies |
Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0502480101 |
DOI | https://doi.org/10.5270/esa-gfkpdn9 |
Principal Investigator, PI | Dr Ewan OSullivan |
Abstract | Examination of the coverage of elliptical galaxies in the XMM and Chandraarchives reveals a bias toward the brightest nearby galaxies, and particularlyto the dominant ellipticals of groups and clusters, rendering accuratestatistical studies of galaxy properties impossible. To correct this problem, wepropose short observations of 22 non-dominant ellipticals with log LB greaterthan 10 solar, Distance less than 30 Mpc, and |b| greater than 10 degrees.Combined with 25 galaxies from the archive, these exposures will form acomplete, representative and unbiased sample of non-dominant ellipticals. Thiscan then be used to determine the true range of gas content and properties inelliptical galaxies, shedding light on halo formation and evolution. |
Publications |
|
Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
Temporal Coverage | 2007-05-01T12:18:02Z/2008-01-05T03:56:23Z |
Version | 17.56_20190403_1200 |
Mission Description | The European Space Agencys (ESA) X-ray Multi-Mirror Mission (XMM-Newton) was launched by an Ariane 504 on December 10th 1999. XMM-Newton is ESAs 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 Earths 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 | 2009-02-01T00:00:00Z |
Last Update | 2025-01-27 |
Keywords | "local elliptical galaxy", "elliptical galaxy", "XMM", "dominant ellipticals", "log lb", "shedding light", "halo formation", "gas content", "chandra archives reveals", "unbiased sample", "galaxy properties impossible", "brightest nearby galaxy" |
Publisher And Registrant | European Space Agency |
Credit Guidelines | European Space Agency, Dr Ewan O'Sullivan, 2009, 'An Unbiased Sample of Local Elliptical Galaxies', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-gfkpdn9 |