A dataset provided by the European Space Agency

Name 078076
Title Measuring the Accretion Rate onto the Edge-on Spiral Galaxy NGC 891


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, 078076, 17.56_20190403_1200. https://doi.org/10.5270/esa-o3qzl1d