English
Related papers

Related papers: Radiation pressure confinement - IV. Application t…

200 papers

Outflows up to 1500 km/s of atomic neutral hydrogen are detected in a growing number of radio galaxies. Outflows with similar velocities are also detected in ionized gas, suggesting a common origin for the extreme kinematics of these two…

Astrophysics · Physics 2007-05-23 R. Morganti , T. Oosterloo , C. Tadhunter

In the course of a large intervening MgII survey of 25 quasars, the CIV emission lines of six (three radio-loud and three radio-quiet) were observed serendipitously. In four of these six quasars, we detected associated narrow absorption…

Young radio AGN are pivotal for our understanding of many of the still-debated aspects of AGN feedback. In this paper we present a study of the interstellar medium in the compact, peaked-spectrum radio galaxy PKSB1934-63 using X-shooter…

Astrophysics of Galaxies · Physics 2018-10-03 F. Santoro , M. Rose , R. Morganti , C. Tadhunter , T. A. Oosterloo , J. Holt

Early studies of nearby Seyfert galaxies have led to the picture that the Narrow Line Region (NLR) is a cone-shaped region of gas ionized by radiation from a nuclear source collimated by a dusty torus, where the gas is in outflow. In this…

Astrophysics of Galaxies · Physics 2015-06-23 Thaisa Storchi-Bergmann

We present an unprecedented view on the morphology and kinematics of the extended narrow-line region (ENLR) and molecular gas around the prototypical hyper-luminous quasar 3C273 ($L\sim10^{47}$ erg/s at z=0.158) based on VLT-MUSE optical 3D…

Astrophysics of Galaxies · Physics 2019-07-17 B. Husemann , V. N. Bennert , K. Jahnke , T. A. Davis , J. -H. Woo , J. Scharwächter , A. Schulze , M. Gaspari , M. Zwaan

We determine the physical conditions and location of the outflow material seen in the mini-BAL quasar SDSS J1111+1437 (z = 2.138). These results are based on the analysis of a high S/N, medium-resolution VLT/X- shooter spectrum. The main…

Astrophysics of Galaxies · Physics 2019-05-13 Xinfeng Xu , Nahum Arav , Timothy Miller , Chris Benn

We present an analysis of the absorption-line system in the Very Large Telescope/Ultraviolet and Visual Echelle Spectrograph spectrum at a redshift of $z_{\rm a}={3.1448}$ associated with the quasar SDSS J122040.23+092326.96, whose…

Astrophysics of Galaxies · Physics 2025-01-03 Qiguo Tian , Lei Hao , Yipeng Zhou , Xiheng Shi , Tuo Ji , Peng Jiang , Lin Lin , Zhenya Zheng , Hongyan Zhou

The connection between X-ray weakness and powerful X-ray outflows is both expected in a scenario where outflows are connected with radiation-driven winds, and observed in several sources, both in the local Universe and at high redshift.…

Astrophysics of Galaxies · Physics 2024-11-20 Bartolomeo Trefoloni

A generic assumption of ionization models of quasar absorption systems is that radiation from local sources is negligible compared with the cosmological background. We test this assumption and find that it is unlikely to hold for absorbers…

Astrophysics · Physics 2009-11-10 Joop Schaye

Roughly 10% of all quasars exhibit Broad Absorption Line (BAL) features which appear to arise in material outflowing at high velocity from the active galactic nucleus (AGN). The details of this outflow are, however, very poorly constrained…

Astrophysics · Physics 2009-10-31 Kunegunda E. Belle , Geraint F. Lewis

Quasar outflows have long been recognized as potential contributors to the co-evolution between supermassive black holes (SMBHs) and their host galaxies. The role of outflows in AGN feedback processes can be better understood by placing…

Astrophysics of Galaxies · Physics 2018-01-31 S. M. McGraw , J. C. Shields , F. W. Hamann , D. M. Capellupo , H. Herbst

Active galactic nuclei (AGN) accreting at rates close to the Eddington limit can host radiatively driven mildly relativistic outflows. Some of these X-ray absorbing but powerful outflows may produce strong shocks resulting in a significant…

High Energy Astrophysical Phenomena · Physics 2018-11-14 Jun Yang , Tao An , Fang Zheng , Willem A. Baan , Zsolt Paragi , Prashanth Mohan , Zhongli Zhang , Xiang Liu

Galactic outflows regulate the amount of gas galaxies convert into stars. However, it is difficult to measure the mass outflows remove because they span a large range of temperatures and phases. Here, we study the rest-frame ultraviolet…

Astrophysics of Galaxies · Physics 2017-12-27 J. Chisholm , R. Bordoloi , J. R. Rigby , M. Bayliss

We have modeled the far-infrared water line emission expected from circumstellar outflows from oxygen-rich late-type stars, as a function of the mass-loss rate and the terminal outflow velocity. For each mass-loss rate and terminal outflow…

Astrophysics · Physics 2009-10-28 Wesley Chen , David A. Neufeld

We detect bright [CII]158$\mu$m line emission from the radio galaxy 3C 326N at z=0.09, which shows weak star formation ($SFR<0.07$M$_{\odot}$~yr$^{-1}$) despite having strong H$_2$ line emission and $2\times 10^9$M$_{\odot}$ of molecular…

Astrophysics of Galaxies · Physics 2015-01-21 P. Guillard , F. Boulanger , M. D. Lehnert , G. Pineau des Forêts , F. Combes , E. Falgarone , J. Bernard-Salas

We present a detailed analysis of a large-scale galactic outflow in the CGM of a massive (M_h ~ 10^12.5 Msun), star-forming (6.9 Msun/yr), sub-L* (0.5 L_B*) galaxy at z=0.39853 that exhibits a wealth of metal-line absorption in the spectra…

We study steady, radial gas outflows from galaxies in an effort to understand the way tenuous and hot gas is transported to large distances away from galaxies. In particular, we obtain solutions for outflow problems, and study the outflow…

Astrophysics · Physics 2009-10-22 Boqi Wang

X-ray absorption line spectroscopy has recently shown evidence for previously unknown Ultra-fast Outflows (UFOs) in radio-quiet AGNs. In the previous paper of this series we defined UFOs as those absorbers with an outflow velocity higher…

High Energy Astrophysical Phenomena · Physics 2015-05-30 F. Tombesi , M. Cappi , J. N. Reeves , G. G. C. Palumbo , V. Braito , M. Dadina

We measure the differential microlensing of the broad emission lines between 18 quasar image pairs in 16 gravitational lenses. We find that high ionization lines such as CIV are more strongly microlensed than low ionization lines,…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-05 E. Guerras , E. Mediavilla , J. Jimenez-Vicente , C. S. Kochanek , J. A. Muñoz , E. Falco , V. Motta

Aims. Outflows from active galactic nuclei are invoked as the principal feedback process regulating the co-evolution of supermassive black holes and their host galaxies. Because of their multi-phase and multi-scale nature, an exhaustive…