| Proposal ID | 078076 |
| Title | Measuring the Accretion Rate onto the Edge-on Spiral Galaxy NGC 891 |
| Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0780760101 |
| DOI | https://doi.org/10.5270/esa-o3qzl1d |
| Principal Investigator, PI | Mr Edmund Hodges-Kluck |
| Abstract | The hot halos of spiral galaxies contain material accreted from theintergalactic medium and material expelled from the disk. The mass in eachcomponent constrains galaxy formation models, and can be distinguished by themetallicity. However, isolating the hot gas and measuring its metallicityrequires a large number of photons, and halos tend to be faint. The bestcandidate is NGC 891, a nearby, edge-on Milky Way analog with an X-ray brighthalo. Existing data indicate an accretion rate of 0.2 Msun/yr, but there are toofew photons to rule out several other plausible halo models. We will measure theaccretion rate and the hot gas composition up to 8 kpc from the disk. |
| Publications |
|
| 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 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 | 2018-04-05T22:00:00Z |
| Last Update | 2025-01-27 |
| Keywords | "accretion rate", "material expelled", "hot gas composition", "spiral galaxy", "halos tend", "ngc 891", "xray bright halo", "existing data", "intergalactic medium", "hot halos", "NGC 891", "hot gas", "material accreted", "halo models" |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Mr Edmund Hodges-Kluck, 2018, 'Measuring the Accretion Rate onto the Edge-on Spiral Galaxy NGC 891', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-o3qzl1d |