2018A&A...610L..13D


Query : 2018A&A...610L..13D

2018A&A...610L..13D - Astronomy and Astrophysics, volume 610, L13-13 (2018/2-1)

Yet another UFO in the X-ray spectrum of a high-z lensed QSO.

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

Abstract (from CDS):

Aim. Ultra-fast outflows (UFO) appear to be common in local active galactic nuclei (AGN) and may be powerful enough (Ekin≥1% of Lbol) to effectively quench the star formation in their host galaxies. To test feedback models based on AGN outflows, it is mandatory to investigate UFOs near the peak of AGN activity, that is, at high-z where only a few studies are available to date.
Methods. UFOs produce Fe resonant absorption lines measured above ~=7keV. The most critical problem in detecting such features in distant objects is the difficulty in obtaining X-ray data with sufficient signal-to-noise. We therefore selected a distant QSO that gravitational lensing made bright enough for these purposes, the z=2.64 QSO MG J0414+0534, and observed it with XMM-Newton for ~=78ks.
Results. The X-ray spectrum of MG J0414+0534 is complex and shows signatures of cold absorption (NH~=4x1022cm–2) and of the presence of an iron emission line (E~=6.4keV, EW=95±53eV) consistent with it originating in the cold absorber. Our main result, however, is the robust detection (more than 5σ) of an absorption line at Eint~=9.2keV (Eobs~=2.5keV observer frame). If interpreted as due to FeXXVI, it implies gas outflowing at vout~=0.3c. To our knowledge, this is the first detection of an UFO in a radio-loud quasar at z≥1.5. We estimated that the UFO mechanical output is Ekin~=2.5Lbol with pout/prad~=17 indicating that it is capable of installing significant feedback between the super-massive black hole and the bulge of the host galaxy. We argue that this also suggests a magnetic driving origin of the UFO.

Abstract Copyright: © ESO 2018

Journal keyword(s): galaxies: high-redshift - quasars: individual: MG J0414+0534 - X-rays: individuals: MG J0414+0534

Simbad objects: 7

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Number of rows : 7
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 [LBX2017] 785 AGN 03 32 42.640 -27 38 15.50   28.17 23.88 23.57 25.82 ~ 29 0
2 4C 05.19 QSO 04 14 37.7673624 +05 34 42.328449   24.100 23.800 21.270   ~ 347 2
3 QSO B0810+2554 QSO 08 13 31.2926 +25 45 03.061   16.58 16.18     ~ 98 1
4 QSO J0831+5245 QSO 08 31 41.7108197808 +52 45 17.616994560   19.2   14.5 13.9 ~ 520 1
5 QSO B1115+080A QSO 11 18 16.951 +07 45 58.23   16.61 16.44     ~ 665 2
6 QSO J1415+1129 QSO 14 15 46.25 +11 29 43.4   17.63 17.23     ~ 623 0
7 HS 1700+6416 QSO 17 01 00.6194059368 +64 12 09.118892376   16.39 16.17     ~ 364 0

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2022.11.27-20:41:04

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