| Proposal ID | 084236 |
| Title | Solving the Missing Baryons in Galaxies Problem |
| Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0842361301 |
| DOI | https://doi.org/10.5270/esa-05sxu5y |
| Principal Investigator, PI | Prof Joel Bregman |
| Abstract | Most of the baryons in galaxies do not lie in stars or a gaseous disk. Much, ifnot all of these missing baryons are thought to lie in hot gaseous halos aroundgalaxies whose size defines the degree of feedback and the mass reservoir forfuture generations of star formation. X-ray studies of individual galaxiesindicate that the missing baryons are not contained within R200, but extend tolarger radii, signaling strong feedback effects. In conflict, the SZ signal fromstacks of galaxies implies that the missing baryons lie within R200. Thisconflict will be resolved in this program by determining the X-ray properties ofthe galaxies used for stacking to discover if the SZ signal is badlycontaminated by galaxy clusters and groups. |
| Publications |
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| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2019-10-04T11:01:57Z/2020-04-15T16:50:45Z |
| Version | 21.51_20241115_1113 |
| 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 | 2021-05-01T00:00:00Z |
| Last Update | 2026-06-19 |
| Keywords | "xray properties", "larger radii", "star formation", "feedback effects", "gaseous disk", "future generations", "galaxy cluster", "individual galaxy", "badly contaminated", "sz signal", "hot gaseous halos", "mass reservoir", "missing baryons lie", "size defines", "missing baryons", "galaxy implies" |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Prof Joel Bregman, 2021, 'Solving the Missing Baryons in Galaxies Problem', 21.51_20241115_1113, European Space Agency, https://doi.org/10.5270/esa-05sxu5y |
| Rights | Data hosted in the ESA Space Science Archives are distributed under the CC BY-NC 3.0 IGO license. |