2017A&A...598A.122B


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.04CEST02:55:40

2017A&A...598A.122B - Astronomy and Astrophysics, volume 598A, 122-122 (2017/2-1)

The WISSH quasars project. I. Powerful ionised outflows in hyper-luminous quasars.

BISCHETTI M., PICONCELLI E., VIETRI G., BONGIORNO A., FIORE F., SANI E., MARCONI A., DURAS F., ZAPPACOSTA L., BRUSA M., COMASTRI A., CRESCI G., FERUGLIO C., GIALLONGO E., LA FRANCA F., MAINIERI V., MANNUCCI F., MARTOCCHIA S., RICCI F., SCHNEIDER R., TESTA V. and VIGNALI C.

Abstract (from CDS):

Models and observations suggest that both the power and effects of AGN feedback should be maximised in hyper-luminous (LBol>1047erg/s) quasars, i.e. objects at the brightest end of the AGN luminosity function. In this paper, we present the first results of a multiwavelength observing programme, focusing on a sample of WISE/SDSS selected hyper-luminous (WISSH) broad-line quasars at z~=1.5-5. The WISSH quasars project has been designed to reveal the most energetic AGN-driven outflows, estimate their occurrence at the peak of quasar activity, and extend the study of correlations between outflows and nuclear properties up to poorly investigated, extreme AGN luminosities, i.e. LBol∼1047-1048erg/s. We present near-infrared, long-slit LBT/LUCI1 spectroscopy of five WISSH quasars at z~=2.3-3.5, showing prominent [OIII] emission lines with broad (FWHM∼1200-2200km/s) and skewed profiles. The luminosities of these broad [OIII] wings are the highest measured so far, with L[OIII]broad≥5x1044erg/s, and reveal the presence of powerful ionised outflows with associated mass outflow rates M≥1700M/yr and kinetic powers Ekin≥1045erg/s. Although these estimates are affected by large uncertainties because of the use of [OIII] as a tracer of ionised outflows and the very basic outflow model adopted here, these results suggest that in our hyper-luminous targets the AGN is highly efficient at pushing large amounts of ionised gas outwards. Furthermore, the mechanical outflow luminosities measured for WISSH quasars correspond to higher percentages (∼1-3%) of LBol than those derived for AGN with lower LBol. Our targets host very massive (MBH≥2x109M) black holes that are still accreting at a high rate (i.e. a factor of ∼0.4-3 of the Eddington limit). These findings clearly demonstrate that WISSH quasars offer the opportunity to probe the extreme end of both luminosity and supermassive black holes (SMBH) mass functions and revealing powerful ionised outflows that are able to affect the evolution of their host galaxies.

Abstract Copyright: © ESO, 2017

Journal keyword(s): galaxies: active - galaxies: nuclei - quasars: emission lines - quasars: general - quasars: supermassive black holes - techniques: imaging spectroscopy

Simbad objects: 8

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Number of rows : 8

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 HD 237611 * 07 22 53.8702499509 +55 20 27.232271938   7.56 7.57     A0V 15 0
2 QSO J0745+4734 QSO 07 45 21.7881463456 +47 34 36.191344902   16.76 16.44     ~ 85 0
3 QSO B0900+42 QSO 09 00 33.5093000271 +42 15 47.031257024   17.63 17.18     ~ 66 0
4 QSO B1159+123 QSO 12 01 47.9113685833 +12 06 30.254501010   18.85 18.16     ~ 87 0
5 HD 114504 * 13 09 50.1758608252 +62 13 44.842301332 6.500 6.510 6.520     A1V 28 0
6 [VV2006] J132655.0-000531 QSO 13 26 54.9510725223 -00 05 30.128528420   21.22 20.81     ~ 30 0
7 HD 123233 PM* 14 06 09.5675320813 +09 53 43.249160484   8.71 8.63     A0V 19 0
8 2MASS J15493872+1245092 QSO 15 49 38.7150556228 +12 45 09.160054709   19.21 18.54 17.61   ~ 27 0

    Equat.    Gal    SGal    Ecl

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2020.07.04-02:55:40

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