| Name | 078076 |
| Title | Measuring the Accretion Rate onto the Edge-on Spiral Galaxy NGC 891 |
| URL | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0780760101 |
| DOI | https://doi.org/10.5270/esa-o3qzl1d |
| Author | Mr Edmund Hodges-Kluck |
| Description | The hot halos of spiral galaxies contain material accreted from the intergalactic medium and material expelled from the disk. The mass in each component constrains galaxy formation models, and can be distinguished by the metallicity. However, isolating the hot gas and measuring its metallicity requires a large number of photons, and halos tend to be faint. The best candidate is NGC 891, a nearby, edge-on Milky Way analog with an X-ray bright halo. Existing data indicate an accretion rate of 0.2 Msun-yr, but there are too few photons to rule out several other plausible halo models. We will measure the accretion rate and the hot gas composition up to 8 kpc from the disk. |
| Publication | No observations found associated with the current proposal |
| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2017-01-27T00:54:06Z/2017-02-26T19:30:21Z |
| 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 | 2018-04-05T22:00:00Z |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, 2018-04-05T22:00:00Z, 078076, 17.56_20190403_1200. https://doi.org/10.5270/esa-o3qzl1d |