| Name | 069330 |
| Title | The Metal Abundance of X-ray Faint Early-Type Galaxies: Effects of Dilution |
| URL | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0693300101 |
| DOI | https://doi.org/10.5270/esa-bpw8k2f |
| Author | European Space Agency |
| Description | The metallicity of hot gas in E/S0 galaxies is known to vary widely, in the sense that galaxies with only small amounts of hot gas often have very low hot gas metallicities. One solution is that what little hot gas X-ray faint systems have has been diluted by pristine hydrogen gas in the vicinity of the galaxy. There is a growing body of evidence suggesting that some early-type galaxies harbor sizable large-scale HI halos, presumably left over from the epoch of galaxy formation. If this pristine HI is accreted, the existing hot gas in the galaxy will be diluted. We propose to test this by measuring the metallicities of a sample of X- ray faint galaxies with a range of HI-to-hot gas ratios. If the dilution hypothesis is correct, galaxies with more HI will have lower hot gas metallicities. |
| Publication | No observations found associated with the current proposal |
| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2012-05-20T01:54:39Z/2012-08-03T07:19:11Z |
| 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 | 2013-08-24T00:00:00Z |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, 2013, The Metal Abundance Of X-Ray Faint Early-Type Galaxies: Effects Of Dilution, 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-bpw8k2f |