2020A&A...638A.136B


Query : 2020A&A...638A.136B

2020A&A...638A.136B - Astronomy and Astrophysics, volume 638A, 136-136 (2020/6-1)

X-raying winds in distant quasars: The first high-redshift wind duty cycle.

BERTOLA E., DADINA M., CAPPI M., VIGNALI C., CHARTAS G., DE MARCO B., LANZUISI G., GIUSTINI M. and TORRESI E.

Abstract (from CDS):


Aims. Theoretical models of wind-driven feedback from active galactic nuclei (AGN) often identify ultra-fast outflows as being the main agent in the generation of galaxy-sized outflows, which are possibly the main actors in establishing so-called AGN-galaxy co-evolution. Ultra-fast outflows are well characterized in local AGN but much less is known in quasars at the cosmic time when star formation and AGN activity peaked (z~=1-3). It is therefore necessary to search for evidence of ultra-fast outflows in high-z sources to test wind-driven AGN feedback models.
Methods. Here we present a study of Q2237+030, the Einstein Cross, a quadruply-imaged radio-quiet lensed quasar located at z=1.695. We performed a systematic and comprehensive temporally and spatially resolved X-ray spectral analysis of all the available Chandra and XMM-Newton data (as of September 2019).
Results. We find clear evidence for spectral variability, possibly due to absorption column density (or covering fraction) variability intrinsic to the source. For the first time in this quasar, we detect a fast X-ray wind outflowing at vout~=0.1c that would be powerful enough (Ekin~=0.1Lbol) to significantly affect the evolution of the host galaxy. We report also on the possible presence of an even faster component of the wind (vout∼0.5c). For the first time in a high-z quasar, given the large sample and long time interval spanned by the analyzed X-ray data, we are able to roughly estimate the wind duty cycle as ~=0.46 (0.31) at 90% (95%) confidence level. Finally, we also confirm the presence of a Fe Kα emission line with variable energy, which we discuss in the light of microlensing effects as well as considering our findings on the source.

Abstract Copyright: © ESO 2020

Journal keyword(s): galaxies: high-redshift - quasars: individual: Q2237+030 - quasars: absorption lines - X-rays: general

Simbad objects: 12

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Number of rows : 12
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 2MASX J00535615-7038045 Sy2 00 53 56.152 -70 38 04.58   17.22 16.2 16.14   ~ 87 0
2 4C 05.19 QSO 04 14 37.7673624 +05 34 42.328449   24.100 23.800 21.270   ~ 338 2
3 QSO B0810+2554 QSO 08 13 31.2926 +25 45 03.061   16.58 16.18     ~ 86 1
4 QSO J0831+5245 QSO 08 31 41.7095363198 +52 45 17.620340544   19.2   14.5 13.9 ~ 504 1
5 QSO B1115+080A QSO 11 18 16.951 +07 45 58.23   16.61 16.44     ~ 640 2
6 QSO J1131-1231 QSO 11 31 51.5387 -12 31 58.716           ~ 232 1
7 QSO J1415+1129 QSO 14 15 46.25 +11 29 43.4   17.63 17.23     ~ 608 0
8 HS 1700+6416 QSO 17 01 00.6195618802 +64 12 09.118927057   16.39 16.17     ~ 349 0
9 QSO J2240+0321 QSO 22 40 30.234 +03 21 30.63           ~ 650 1
10 QSO B2237+0305D LeI 22 40 30.28 +03 21 29.3   18.98       ~ 76 0
11 QSO B2237+0305B LeI 22 40 30.30 +03 21 30.5   17.82       ~ 76 0
12 QSO B2237+0305C LeI 22 40 30.38 +03 21 30.0   18.66       ~ 79 0

    Equat.    Gal    SGal    Ecl

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2021.07.29-10:03:36

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