Molecular outflow and feedback in the obscured quasar XID2028 revealed by ALMA

被引：84

作者：

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

Cresci, G. ^{[3
]}

Daddi, E. ^{[4
]}

Paladino, R. ^{[5
]}

Perna, M. ^{[3
]}

Bongiorno, A. ^{[6
]}

Lusso, E. ^{[7
]}

Sargent, M. T. ^{[8
]}

Casasola, V. ^{[3
]}

Feruglio, C. ^{[9
]}

Fraternali, F. ^{[1
]}

Georgiev, I. ^{[10
]}

Mainieri, V. ^{[11
]}

Carniani, S. ^{[12
,13
]}

Comastri, A. ^{[2
]}

Duras, F. ^{[6
]}

Fiore, F. ^{[6
]}

Mannucci, F. ^{[3
]}

Marconi, A. ^{[3
,14
]}

Piconcelli, E. ^{[6
]}

Zamorani, G. ^{[2
]}

Gilli, R. ^{[2
]}

La Franca, F. ^{[15
]}

Lanzuisi, G. ^{[1
,2
]}

Lutz, D. ^{[16
]}

Santini, P. ^{[6
]}

Scoville, N. Z. ^{[17
]}

Vignali, C. ^{[1
,2
]}

Vito, F. ^{[18
,19
]}

Rabien, S.

Busoni, L. ^{[3
]}

Bonaglia, M. ^{[3
]}

机构：

[1] Univ Bologna, Dipartimento Fis & Astron, Via Gobetti 93-2, I-40129 Bologna, Italy

[2] Osservatorio Astron Bologna, INAF, Via Gobetti 93-3, I-40129 Bologna, Italy

[3] Osserv Astrofis Arcetri, INAF, Largo Enrico Fermi 5, I-50125 Florence, Italy

[4] Univ Paris Diderot, Univ Paris Saclay, CNRS, CEA,IRFU,DAp,AIM,Sorbonne Paris Cite, F-91191 Gif Sur Yvette, France

[5] Ist Radioastron, INAF, Via Gobetti 101, I-40129 Bologna, Italy

[6] Osserv Astron Roma, INAF, Via Frascati 33, I-00078 Monte Porzio Catone, RM, Italy

[7] Univ Durham, Ctr Extragalact Astron, Dept Phys, South Rd, Durham DH1 3LE, England

[8] Univ Sussex, Astron Ctr, Dept Phys & Astron, Brighton BN1 9QH, E Sussex, England

[9] Osserv Astron Trieste, INAF, Via GB Tiepolo 11, I-34143 Trieste, Italy

[10] Max Planck Inst Astron, Konigstuhl 17, D-69117 Heidelberg, Germany

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

[12] Univ Cambridge, Cavevdish Lab, 19 JJ Thomson Ave, Cambridge CB3 0HE, England

[13] Univ Cambridge, Kavli Inst Cosmol, Madingley Rd, Cambridge CB3 0HA, England

[14] Univ Firenze, Dipartimento Fis & Astron, Via G Sansone 1, I-50019 Sesto Fiorentino, Firenze, Italy

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

[16] Max Planck Inst Extraterr Phys, Giessenbachstr 1, D-85748 Garching, Germany

[17] CALTECH, MC 249-17,1200 East Calif Blvd, Pasadena, CA 91125 USA

[18] Penn State Univ, Dept Astron & Astrophys, 525 Davey Lab, University Pk, PA 16802 USA

[19] Penn State Univ, Inst Gravitat & Cosmos, University Pk, PA 16802 USA

来源：

ASTRONOMY & ASTROPHYSICS | 2018年 / 612卷

基金：

英国科学技术设施理事会; 欧盟地平线“2020”;

关键词：

quasars: individual: XID2028; galaxies: star formation; galaxies: active; galaxies: ISM; SUPERMASSIVE BLACK-HOLES; ACTIVE GALACTIC NUCLEI; STAR-FORMING GALAXIES; SPECTROSCOPIC SURVEY; COSMOS FIELD; GAS; AGN; REDSHIFT; EMISSION; COEVOLUTION;

D O I：

10.1051/0004-6361/201731641

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We imaged, with ALMA and ARGOS/LUCI, the molecular gas and dust and stellar continuum in XID2028, which is an obscured quasi-stellar object (QSO) at z = 1.593, where the presence of a massive outflow in the ionised gas component traced by the [OIII]5007 emission has been resolved up to 10 kpc. This target represents a unique test case to study QSO feedback in action at the peak epoch of AGN-galaxy co-evolution. The QSO was detected in the CO(5 - 4) transition and in the 1.3 mm continuum at similar to 30 and similar to 20 sigma significance, respectively; both emissions are confined in the central (<2 kpc) radius area. Our analysis suggests the presence of a fast rotating molecular disc (v similar to 400 km s(-1)) on very compact scales well inside the galaxy extent seen in the rest-frame optical light (similar to 10 kpc, as inferred from the LUCI data). Adding available measurements in additional two CO transitions, CO(2 - 1) and CO(3 - 2), we could derive a total gas mass of similar to 10(10) M-circle dot, thanks to a critical assessment of CO excitation and the comparison with the Rayleigh-Jeans continuum estimate. This translates into a very low gas fraction (<5%) and depletion timescales of 40-75 Myr, reinforcing the result of atypical gas consumption conditions in XID2028, possibly because of feedback effects on the host galaxy. Finally, we also detect the presence of high velocity CO gas at similar to 5 sigma, which we interpret as a signature of galaxy-scale molecular outflow that is spatially coincident with the ionised gas outflow. XID2028 therefore represents a unique case in which the measurement of total outflowing mass, of similar to 500-800 M-circle dot yr(-1) including the molecular and atomic components in both the ionised and neutral phases, was attempted for a high-z QSO.

引用

页数：15

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