| Name | 055388 |
| Title | Detecting Emission from the Missing Baryons Through X-Ray Shadowing |
| URL | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0553880201 |
| DOI | https://doi.org/10.5270/esa-zkjtsus |
| Author | Prof JOEL BREGMAN |
| Description | The majority of the baryons in the present-day universe are missing in that they are not in galaxies or as cool intergalactic gas. These baryons are most likely diffuse gas at 1E5 - 1E7 K in regions of modest overdensity, and the superposition of many such regions produces X-ray emission that accounts for about 5-20% of the X-ray background in the 0.2-1 keV range. To detect this emission, we propose to use the shadowing properties of the extended gas in the edge-on galaxy NGC 4244. This gas will absorb some of the background emission, leading to a local minimum in the soft X-ray background (a shadow). |
| Publication | No observations found associated with the current proposal |
| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2008-11-16T19:34:56Z/2008-11-19T10:10:13Z |
| 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 | 2009-12-20T00:00:00Z |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Prof JOEL BREGMAN, 2009, 055388, 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-zkjtsus |