| Proposal ID | 040266 |
| Title | XMM monitoring of the Seyfert Galaxy NGC 4151: Probing the Disk-Wind Connection |
| Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0402660101 |
| DOI | https://doi.org/10.5270/esa-h79ziov |
| Principal Investigator, PI | Prof Steven Kraemer |
| Abstract | Recent X-ray observations of NGC 4151 have revealed dramatic changes in theX-ray absorption due to bulk motion of the gas across our line-of-sight. Basedon photoionization models, much of this component must lie within 0.1 pc of thecentral source, which, combined with the large transverse velocity, suggeststhat the absorber arises in a disk-driven wind, making NGC 4151 the only Seyfert1 to have shown direct evidence of this phenomenon. We propose a series of 4 newXMM-Newton observations of NGC 4151, of 40 ksec each, to fully constrain thekinematics, location, and physical conditions of the high-column X-ray aborber,and probe the relative effects of radiation driving, thermal pressure, andmagnetocentrifugal forces in accelerating the gas. |
| Publications |
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| 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 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 | 2008-01-25T00:00:00Z |
| Last Update | 2025-08-04 |
| Keywords | "XMM", "bulk motion", "XMM-Newton", "relative effects", "disk driven wind", "physical conditions", "xmm newton", "disk wind connection", "photoionization models", "magnetocentrifugal forces", "NGC 4151", "transverse velocity", "column xray aborber", "xray absorption", "thermal pressure", "ngc 4151", "radiation driving", "central source" |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Prof Steven Kraemer, 2008, 'XMM monitoring of the Seyfert Galaxy NGC 4151: Probing the Disk-Wind Connection', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-h79ziov |