| Name | 082234 |
| Title | The Extremely High Concentration of the Fossil Group NGC 6482 |
| URL | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0822340101 |
| DOI | https://doi.org/10.5270/esa-3v7ov7p |
| Author | Dr David Buote |
| Description | Although fossil systems are thought to be very old, only a few display above-average concentration parameters. Recently, using Chandra and Suzaku data extending out to R2500 of the well-studied fossil group NGC 6482, we measured c200 that exceeds the mean LCDM c-M relation by 6 sigma with respect to the intrinsic scatter and by 3.5 sigma with respect to the measurement error. The extreme outlier status, if confirmed, would pose a challenge to LCDM galaxy formation, since the scatter in the c-M relation is robust and insensitive to cosmological parameters. We propose a deep XMM-Newton observation of NGC 6482 to obtain precise measurements of the gas properties out to R500, particularly the temperature, to verify the high c200 and cement its status as the most extremely evolved fossil system known. |
| Publication | No observations found associated with the current proposal |
| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2018-09-22T13:23:46Z/2019-04-11T14:27:03Z |
| 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 | 2020-05-14T22:00:00Z |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, 2020-05-14T22:00:00Z, 082234, 17.56_20190403_1200. https://doi.org/10.5270/esa-3v7ov7p |