A dataset provided by the European Space Agency

Name 086521
Title Shedding light on the X-ray weakness of the most luminous quasars


DOI https://doi.org/10.57780/esa-citsu3t
Author Dr Luca Zappacosta
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, 2022-01-31T00:00:00Z, 086521, 18.02_20200221_1200. https://doi.org/10.57780/esa-citsu3t