A dataset provided by the European Space Agency

Name: Shedding light on the X-ray weakness of the most luminous quasars
Published: 2022-01-31T00:00:00Z
License: https://creativecommons.org/licenses/by-nc/3.0/igo

Proposal ID	086521
Title	Shedding light on the X-ray weakness of the most luminous quasars
Download Data Associated to the proposal	https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0865210401 https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0865210601
DOI	https://doi.org/10.57780/esa-citsu3t
Principal Investigator, PI	Dr Luca Zappacosta
Abstract	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 blueshiftedCIV 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 13sources, we find that L_X and v_civ significantly correlate. No relation isfound at other bands. Furthermore, at low L_X, our constraints on Gamma and N_Hare insufficient to verify a dependence on v_CIV. We propose for XMMobservations to perform a complete X-ray coverage for the remaining 9 WISSH QSOswith measured v_civ. These will allow a refined investigation enabling us todiscriminate between competing models for the origin of these sources.
Publications	The XMM-Newton Line Emission Analysis Program (X-LEAP). I. Emission-line Survey of O VII O VIII and Fe L-shell Transitions \|Pan Zeyang Qu Zhijie et al. \| ApJS \| 271-62 \| 2024 \| 2024ApJS..271...62P \| http://ui.adsabs.harvard.edu/#abs/2024ApJS..271...62P From Active Stars to Black Holes: A Discovery Tool for Galactic X-Ray Sources \|Rodriguez Antonio C. \| PASP \| 136-054201 \| 2024 \| 2024PASP..136e4201R \| http://ui.adsabs.harvard.edu/#abs/2024PASP..136e4201R Search for Young Stellar Objects within 4XMM-DR13 Using CatBoost and SPE \|Ma Xiangyao Zhang Yanxia et al. \| AJ \| 168-210 \| 2024 \| 2024AJ....168..210M \| http://ui.adsabs.harvard.edu/#abs/2024AJ....168..210M X-Ray Bright Active Galactic Nuclei in Local Dwarf Galaxies: Insights from eROSITA \|Sacchi Andrea Bogdu00e1n u00c1kos et al. \| ApJ \| 974-14 \| 2024 \| 2024ApJ...974...14S \| http://ui.adsabs.harvard.edu/#abs/2024ApJ...974...14S
Instrument	EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage	2020-11-24T16:40:14Z/2021-01-07T19:22:33Z
Version	21.51_20241115_1113
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	2022-01-31T00:00:00Z
Last Update	2026-07-09
Keywords	"sub sample", "2000 km", "normal quasars", "wissh qsos", "refined investigation", "low l_x", "shedding light", "quasars wissh", "SDSS", "sizable fraction", "xray weakness", "XMM", "hyperluminous lbol", "complete xray coverage", "luminous quasars"
Publisher And Registrant	European Space Agency
Credit Guidelines	European Space Agency, Dr Luca Zappacosta, 2022, 'Shedding light on the X-ray weakness of the most luminous quasars', 21.51_20241115_1113, European Space Agency, https://doi.org/10.57780/esa-citsu3t
Rights	Data hosted in the ESA Space Science Archives are distributed under the CC BY-NC 3.0 IGO license.