A dataset provided by the European Space Agency

Name 067095
Title Galactic Fountains, Galaxy Infall, and the Dark Matter Content of NGC 891


DOI https://doi.org/10.5270/esa-80y5p6k
Author Prof Joel Bregman
Description We address two galaxy formation issues by studying the hot gas around the edge-on spiral NGC891. The primary issue is the origin of the hot halo, which can occur by infall onto the galaxy or from a galactic fountain generated by disk SNe. We differentiate between models by measuring the gas metallicity, predicted to be low in one model and high in the other. Second, we will measure the vertical component of the galaxy.s gravitational field, thereby lifting a degeneracy in mass models and permitting a unique determination of the dark matter density in the baryon-dominated region. We accomplish this by measuring the temperature and emission measure distribution perpendicular to the disk. Existing data prove feasibility but are not sufficiently deep.
Publication No observations found associated with the current proposal
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2011-08-25T23:46:54Z/2011-08-27T12:41:56Z
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 2012-09-20T00:00:00Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2012, 067095, 17.56_20190403_1200. https://doi.org/10.5270/esa-80y5p6k