| Name | 084236 |
| Title | Solving the Missing Baryons in Galaxies Problem |
| URL | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0842361301 |
| DOI | https://doi.org/10.5270/esa-05sxu5y |
| Author | Prof Joel Bregman |
| Description | Most of the baryons in galaxies do not lie in stars or a gaseous disk. Much, if not all of these missing baryons are thought to lie in hot gaseous halos around galaxies whose size defines the degree of feedback and the mass reservoir for future generations of star formation. X-ray studies of individual galaxies indicate that the missing baryons are not contained within R200, but extend to larger radii, signaling strong feedback effects. In conflict, the SZ signal from stacks of galaxies implies that the missing baryons lie within R200. This conflict will be resolved in this program by determining the X-ray properties of the galaxies used for stacking to discover if the SZ signal is badly contaminated by galaxy clusters and groups. |
| Publication | No observations found associated with the current proposal |
| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2019-10-04T11:01:57Z/2020-04-15T16:50:45Z |
| Version | 18.02_20200221_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 | 2021-05-01T00:00:00Z |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Prof Joel Bregman, 2021, 084236, 18.02_20200221_1200, European Space Agency, https://doi.org/10.5270/esa-05sxu5y |