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

被引：155

作者：

Bischetti, M. ^{[1
,2
]}

Piconcelli, E. ^{[1
]}

Vietri, G. ^{[1
,3
]}

Bongiorno, A. ^{[1
]}

Fiore, F. ^{[1
]}

Sani, E. ^{[4
]}

Marconi, A. ^{[5
,6
]}

Duras, F. ^{[1
,7
]}

Zappacosta, L. ^{[1
]}

Brusa, M. ^{[8
,9
]}

Comastri, A. ^{[9
]}

Cresci, G. ^{[6
]}

Feruglio, C. ^{[1
,10
]}

Giallongo, E. ^{[1
]}

La Franca, F. ^{[7
]}

Mainieri, V. ^{[11
]}

Mannucci, F. ^{[6
]}

Martocchia, S. ^{[1
]}

Ricci, F. ^{[7
]}

Schneider, R. ^{[1
,3
]}

Testa, V. ^{[1
]}

Vignali, C. ^{[8
,9
]}

机构：

[1] INAF Osservatorio Astron Roma, Via Frascati 33, I-00078 Rome, Italy

[2] Univ Roma Tor Vergata, Via Orazio Raimondo 18, I-00173 Rome, Italy

[3] Univ Roma La Sapienza, Piazzale Aldo Moro 5, I-00185 Rome, Italy

[4] ESO, Alonso de Cordova 3107,Cassilla 19001, Santiago 19, Chile

[5] Univ Florence, Dipartimento Fis & Astron, Via G Sansone 1, I-50019 Florence, Italy

[6] INAF Osservatorio Astrofis Arcetri, Largo E Fermi 5, I-50125 Florence, Italy

[7] Univ Rome Tre, Dipartimento Matemat & Fis, Via Vasca Navale 84, I-00146 Rome, Italy

[8] Univ Bologna, Dipartimento Fis & Astron, Viale Berti Pichat 6-2, I-40127 Bologna, Italy

[9] INAF Osservatorio Astron Bologna, Via Ranzani 1, I-40127 Bologna, Italy

[10] INAF Osservatorio Astron Trieste, Via GB Tiepolo 11, I-34143 Trieste, Italy

[11] European Southern Observ, Karl Schwarzschild Str 2, D-85748 Garching, Germany

来源：

ASTRONOMY & ASTROPHYSICS | 2017年 / 598卷

基金：

欧洲研究理事会;

关键词：

galaxies: active; galaxies: nuclei; quasars: emission lines; quasars: general; quasars: supermassive black holes; techniques: imaging spectroscopy; ACTIVE GALACTIC NUCLEI; SUPERMASSIVE BLACK-HOLES; GALAXY-WIDE OUTFLOWS; HIGH-REDSHIFT; DRIVEN OUTFLOWS; EMISSION-LINE; INTERSTELLAR EXTINCTION; MOLECULAR OUTFLOWS; GAS KINEMATICS; AGN FEEDBACK;

D O I：

10.1051/0004-6361/201629301

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Models and observations suggest that both the power and effects of AGN feedback should be maximised in hyper-luminous (L-Bol > 10(47) erg s(-1)) 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 approximate to 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. L-Bol similar to 10(47) - 10(48) erg s(-1). We present near-infrared, long-slit LBT/LUCI1 spectroscopy of five WISSH quasars at z approximate to 2.3 - 3.5, showing prominent [OIII] emission lines with broad (FWHM similar to 1200-2200 km s(-1)) and skewed profiles. The luminosities of these broad [OIII] wings are the highest measured so far, with L-[OIII](broad) greater than or similar to 5 x 10(44) erg s(-1), and reveal the presence of powerful ionised outflows with associated mass outflow rates. (M) over dot greater than or similar to 1700 M-circle dot yr(-1) and kinetic powers. (E)over dot(kin) greater than or similar to 10(45) erg s(-1). 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 (similar to 1-3%) of L-Bol than those derived for AGN with lower L-Bol. Our targets host very massive (M-BH greater than or similar to 2 x 10(9) M-circle dot) black holes that are still accreting at a high rate (i.e. a factor of similar to 0.4-3 of the Eddington limit). These findings clearly demonstrate that WISSH quasars off er 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.

引用

页数：18

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