| Name | 014580 |
| Title | Search for warm-hot gas associated with the Virgo cluster |
| URL | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0145800101 |
| DOI | https://doi.org/10.5270/esa-wzrhlo4 |
| Author | Dr Ryuichi Fujimoto |
| Description | The amount of baryons detected so far at z=0 is only about 20-30% of that detected at z=2, or calculated from the standard big-bang nucleosynthesis. This .missing baryon. problem is now one of the most important topics in cosmology. Recent simulations predict that most of the baryons in the present Universe reside in a warm-hot intergalactic medium with temperatures of 10^5 - 10^7 K, associated with clusters of galaxies. In order to probe this warm-hot gas, we propose to observe a quasar behind the Virgo cluster with RGS, and measure the resonant absorption line of O VIII Ly alpha at 653.6eV. This provides a unique opportunity to settle the missing baryon problem and to understand the formation of the large-scale cosmological structure. |
| Publication | No observations found associated with the current proposal |
| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2003-07-13T08:38:51Z/2003-07-14T14:22:13Z |
| 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 | 2004-09-01T00:00:00Z |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, 2004-09-01T00:00:00Z, 014580, 17.56_20190403_1200. https://doi.org/10.5270/esa-wzrhlo4 |