| Name | 086521 |
| Title | Shedding light on the X-ray weakness of the most luminous quasars |
| URL | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0865210401 |
| DOI | https://doi.org/10.57780/esa-citsu3t |
| Author | European Space Agency |
| Description | In our WISE/SDSS-selected sample of hyperluminous (Lbol > 10^47 erg/s) quasars (WISSH) we are finding a sizable fraction of sources with strongly blueshifted CIV emission lines (v_civ < -2000 km/s) and up to 1.5 dex lower X-ray luminosity (L_X) compared to that reported for normal quasars. Based on a sub-sample of 13 sources, we find that L_X and v_civ significantly correlate. No relation is found at other bands. Furthermore, at low L_X, our constraints on Gamma and N_H are insufficient to verify a dependence on v_CIV. We propose for XMM observations to perform a complete X-ray coverage for the remaining 9 WISSH QSOs with measured v_civ. These will allow a refined investigation enabling us to discriminate between competing models for the origin of these sources. |
| Publication | No observations found associated with the current proposal |
| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2020-11-24T16:40:14Z/2021-01-07T19:22:33Z |
| Version | 18.02_20200221_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 | 2022-01-31T00:00:00Z |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, 2022, Shedding Light On The X-Ray Weakness Of The Most Luminous Quasars, 18.02_20200221_1200, European Space Agency, https://doi.org/10.57780/esa-citsu3t |