| Proposal ID | 080179 |
| Title | A link between X-ray weakness and Eddington ratio in BALQSOs? |
| Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0801790101 |
| DOI | https://doi.org/10.5270/esa-3c6eajk |
| Principal Investigator, PI | Dr Fabio Vito |
| Abstract | We found hints of an anti-correlation between observed X-ray weakness andEddington ratio in a small sample of BALQSOs observed in the X-rays with high-quality black hole mass estimates. We argue that this could be due tointervening obscuration (perhaps due to the presence of a failed wind at thebase of the accretion disk, as requested by some model of wind launching inBALQSOs) or to intrinsic (i.e. not due to absorption) X-ray weakness, sometimesassociated with rapidly-accreting SMBH. In order to assess if thatanti-correlation exists and to test the different possible physicalexplanations, we propose to observe with XMM-Newton a sample of 8 BALQSOs atz=1.7-1.9, for a total of 147 ks. |
| Publications |
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| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2017-05-01T22:57:23Z/2017-07-13T17:30:51Z |
| 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 | 2018-08-01T22:00:00Z |
| Last Update | 2025-08-04 |
| Keywords | "XMM", "intervening obscuration", "XMM-Newton", "accreting smbh", "wind launching", "eddington ratio", "absorption xray weakness", "failed wind", "quality blackhole mass", "anti correlation", "xmm newton", "balqsos ?.", "accretion disk", "physical explanations", "xray weakness", "anti correlation exists" |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Dr Fabio Vito, 2018, 'A link between X-ray weakness and Eddington ratio in BALQSOs?', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-3c6eajk |