|Title||A deep search for a hot halo of NGC 5746: Constraining disk galaxy formation|
|Author||Dr Jesper Rasmussen|
|Description||Most galaxy formation models predict that massive low-redshift disk galaxies are embedded in extended hot halos of externally accreted gas. Yet observational studies have so far failed to detect soft X-ray emission from such halos. Our cosmological simulations, the first to produce fully realistic disk galaxies, suggest this is within reach but requires a factor of 10 increase in sensitivity compared to existing X-ray studies. We propose a deep observation of the massive spiral NGC5746, to decisively test for the presence of such a halo and constrain its properties. A detection will confirm a basic tenet of disk galaxy formation models, whereas a non-detection will seriously challenge these models and impose new constraints on the growth mode and feedback history of disk galaxies.|
|Publication||Synapses of active galactic nuclei:. Comparing X-ray and optical classifications using artificial neural networks . Gonzalez-Martin, O., Diaz-Gonzalez, D., et all. . A&A . 567-92 . 2014 . 2014A&A...567A..92G ,
Serendipitous UV source catalogues for 10 years of XMM and 5 years of Swift . Yershov, V. N., . Ap&SS . 354-97 . 2014 . 2014Ap&SS.354...97Y ,
Non-detection of X-ray emission from sterile neutrinos in stacked galaxy spectra . Anderson, Michael E., Churazov, Eugene, . MNRAS . 452-3905 . 2015 . 2015MNRAS.452.3905A ,
Ensemble X-ray variability of active galactic nuclei. II. Excess variance and updated structure function . Vagnetti, F., Middei, R., et all. . A&A . 593-55 . 2016 . 2016A&A...593A..55V ,
The Million Optical - Radio-X-ray Associations (MORX) Catalogue . Flesch, Eric W., . PASA . 33-52 . 2016 . 2016PASA...33...52F ,
AGN spectral states from simultaneous UV and X-ray observations by XMM-Newton . Svoboda, J., Guainazzi, M., . A&A . 603-127 . 2017 . 2017A&A...603A.127S ,
A new, clean catalogue of extragalactic non-nuclear X-ray sources in nearby galaxies . Earnshaw, H. P., Roberts, T. P., et all. . MNRAS . 483-5554 . 2019 . 2019MNRAS.483.5554E ,
|Instrument||EMOS1, EMOS2, EPN, OM, RGS1, RGS2|
|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.
|Publisher And Registrant||European Space Agency|
|Credit Guidelines||European Space Agency, 2012-03-08T00:00:00Z, 065189, 17.56_20190403_1200. https://doi.org/10.5270/esa-7v6dp39|