A dataset provided by the European Space Agency

Name 002734
Title X-Ray Isophote Shapes and the Dark Matter Halo of NGC 3923
URL

https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0027340101

DOI https://doi.org/10.5270/esa-uvk3670
Author Prof David Buote
Description The X-ray isophote shapes of elliptical galaxies probe both the shape and radial
distribution of the gravitating mass essentially independently of th temperature
profile of the hot gas. We propose to observe the elliptical NGC 3923 with XMM
to obtain accurate measurements of the ellipticity of the X-ray emission
extending out to the faintest isophotes detected with the ROSAT PSPC (10 arcmin,
virgul90 kpc) whereas ROSAT only obtained useful ellipticity constraints within 1.5
arcmin. Consequently, our XMM observation will definitively answer the questions
of whether the mass is more elongated than the stars and whether the radial
mass density profile is shallower than the CDM NFW profile. These results will
thus provide important tests of cosmological theories of structure formation.
Publication No observations found associated with the current proposal
Instrument EMOS1, EMOS2, EPN, RGS1, RGS2
Temporal Coverage 2002-01-03T19:56:50Z/2002-01-04T08:35:43Z
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 2003-05-02T00:00:00Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, Prof David Buote, 2003, 002734, 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-uvk3670