|Title||An X-ray Tail in the NGC 1407 Group|
|Author||Dr R. Brent Tully|
|Description||The nearby NGC 1407 Group shares properties with so-called .fossil groups. and presents a possibility to study a representative of this interesting class with high spatial resolution. The elliptical NGC 1407 dominates a group that has few intermediate luminosity galaxies, but a large entourage of dwarfs. The velocity dispersion of this group is 387 km-s, whence M-L_R = 340 M_sun-L_sun. The second brightest confirmed member, NGC 1400, has an extraordinarily deviant velocity of virgul1000 km-s in the group frame. ROSAT data reveal an X-ray tail between NGC 1400 and NGC 1407 with a highly unexpected peak on top of a dwarf member galaxy. Possible explanations include a Bondi-Hoyle wake, stripped gas from NGC 1400, or something more exotic.|
|Publication||No observations found associated with the current proposal|
|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, 2008-04-03T00:00:00Z, 040475, 17.56_20190403_1200. https://doi.org/10.5270/esa-rrbnj56|