A dataset provided by the European Space Agency

Name 040475
Title An X-ray Tail in the NGC 1407 Group
URL

http://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0404750101
http://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0404750201

DOI 10.5270/esa-rrbnj56
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 ~1000 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.
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Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2007-02-11T08:50:27Z/2007-02-12T06:04:55Z
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 2008-04-03T00:00:00Z
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