A dataset provided by the European Space Agency

Name 040266
Title XMM monitoring of the Seyfert Galaxy NGC 4151: Probing the Disk-Wind Connection


DOI https://doi.org/10.5270/esa-h79ziov
Author Prof Steven Kraemer
Description Recent X-ray observations of NGC 4151 have revealed dramatic changes in the X-ray absorption due to bulk motion of the gas across our line-of-sight. Based on photoionization models, much of this component must lie within 0.1 pc of the central source, which, combined with the large transverse velocity, suggests that the absorber arises in a disk-driven wind, making NGC 4151 the only Seyfert 1 to have shown direct evidence of this phenomenon. We propose a series of 4 new XMM-Newton observations of NGC 4151, of 40 ksec each, to fully constrain the kinematics, location, and physical conditions of the high-column X-ray aborber, and probe the relative effects of radiation driving, thermal pressure, and magnetocentrifugal forces in accelerating the gas.
Publication No observations found associated with the current proposal
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2006-05-16T06:21:42Z/2006-11-30T11:02:58Z
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 2008-01-25T00:00:00Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2008-01-25T00:00:00Z, 040266, 17.56_20190403_1200. https://doi.org/10.5270/esa-h79ziov