Proposal ID | 040475 |
Title | An X-ray Tail in the NGC 1407 Group |
Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0404750101 |
DOI | https://doi.org/10.5270/esa-rrbnj56 |
Principal Investigator, PI | Dr R. Brent Tully |
Abstract | The nearby NGC 1407 Group shares properties with so-called fossil groups andpresents a possibility to study a representative of this interesting class withhigh spatial resolution. The elliptical NGC 1407 dominates a group that has fewintermediate luminosity galaxies, but a large entourage of dwarfs. The velocitydispersion of this group is 387 km/s, whence M/L_R = 340 M_sun/L_sun. The secondbrightest 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 1400and 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, orsomething more exotic. |
Publications |
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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 Agencys (ESA) X-ray Multi-Mirror Mission (XMM-Newton) was launched by an Ariane 504 on December 10th 1999. XMM-Newton is ESAs 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 Earths 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 |
Last Update | 2025-01-27 |
Keywords | "xray tail", "ngc 1407", "rosat data", "shares properties", "ngc 1400", "340 m_sun", "387 km", "ROSAT", "velocity dispersion", "stripped gas", "bondi hoyle wake", "intermediate luminosity galaxy", "nearby ngc 1407", "extraordinarily deviant velocity", "NGC 1407", "spatial resolution" |
Publisher And Registrant | European Space Agency |
Credit Guidelines | European Space Agency, Dr R. Brent Tully, 2008, 'An X-ray Tail in the NGC 1407 Group', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-rrbnj56 |