A Radio Study of the Seyfert Galaxy IC 5063: Evidence for Fast Gas Outflow

Morganti, Raffaella; Oosterloo, Tom; Tsvetanov, Z.

doi:10.1086/300236

Cited by 97 publications

(163 citation statements)

References 61 publications

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“…1 the total intensity of the CO(2−1) is shown. The single pointing ALMA observation detects molecular gas up to a radius of ∼10 , therefore covering only the very inner part (r < 2 kpc) of the H i disk observed with ATCA (Morganti et al 1998). The bulk of the emission covers the same range of velocities (between 3140 to 3630 km s −1 ) as traced by the APEX observations (Morganti et al 2013b).…”

Section: The Alma Datamentioning

confidence: 87%

“…IC 5063 was the first object in which a fast, AGN-driven massive outflow of H i was detected (Morganti et al 1998). This outflow was found to be located against the brightest radio hot spot, about 0.5 kpc from the radio core (Oosterloo et al 2000), which has been interpreted as evidence that the outflow is driven by the interaction of the radio jet with the surrounding ISM in which the jet is moving in the plane of the large-scale gas disk of IC 5063.…”

Section: A Case Study: Ic 5063mentioning

confidence: 99%

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The fast molecular outflow in the Seyfert galaxy IC 5063 as seen by ALMA

Morganti

Oosterloo

Oonk

et al. 2015

A&A

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We use high-resolution (0.5 arcsec) CO(2−1) observations performed with the Atacama Large Millimetre/submillimetre Array to trace the kinematics of the molecular gas in the Seyfert 2 galaxy IC 5063. The data reveal that the kinematics of the gas is very complex. A fast outflow of molecular gas extends along the entire radio jet (∼1 kpc), with the highest outflow velocities about 0.5 kpc from the nucleus, at the location of the brighter hot spot in the western lobe. The ALMA data show that a massive, fast outflow with velocities up to 650 km s −1 of cold molecular gas is present, in addition to the outflow detected earlier in warm H 2 , H i and ionized gas. All phases of the gas outflow show similar kinematics. IC 5063 appears to be one of the best examples of the multi-phase nature of AGN-driven outflows. Both the central AGN and the radio jet could energetically drive the outflow, however, the characteristics of the outflowing gas point to the radio jet being the main driver. This is an important result because IC 5063, although one of the most powerful Seyfert galaxies, is a relatively weak radio source (P 1.4 GHz = 3 × 10 23 W Hz −1 ). All the observed characteristics can be described by a scenario of a radio plasma jet expanding into a clumpy medium, interacting directly with the clouds and inflating a cocoon that drives a lateral outflow into the interstellar medium. This model is consistent with results obtained by recent simulations. A stronger, direct interaction between the jet and a gas cloud is present at the location of the brighter western lobe. This interaction may also be responsible for the asymmetry in the radio brightness of the two lobes. Even assuming the most conservative values for the conversion factor CO-to-H 2 , we find that the mass of the outflowing gas is between 1.9 and 4.8 × 10 7 M , of which between 0.5 and 1.3 × 10 7 M is associated with the fast outflow at the location of the western lobe. These amounts are much larger than those of the outflow of warm gas (molecular and ionized) and somewhat larger than of the H i outflow. This suggests that most of the observed cold molecular outflow is due to fast cooling after being shocked. This gas is the end product of the cooling process, although some of it could be the result of only partly dissociated clouds. Our CO observations demonstrate that fast outflows of substantial masses of molecular gas can be driven by relativistic jets, although in the case of IC 5063 the outflows are not fast enough to remove significant amounts of gas from the galaxy and the effects are limited to the central ∼0.5 kpc from the centre.

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Section: The Alma Datamentioning

confidence: 87%

Section: A Case Study: Ic 5063mentioning

confidence: 99%

The fast molecular outflow in the Seyfert galaxy IC 5063 as seen by ALMA

Morganti

Oosterloo

Oonk

et al. 2015

A&A

223

269

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“…This is illustrated in Fig. 2 where the H I emission profile is taken from Morganti et al (1998) and represents the full velocity amplitude of the H I gas in the large-scale disk, which is unaffected by the active galactic nucleus (AGN). Also indicated in Fig.…”

Section: Co(2-1) In Ic 5063: the Apex Observationsmentioning

confidence: 99%

“…Here we present the results of CO(2-1) observations of the nearby, southern radio-loud Seyfert galaxy IC 5063 (z = 0.0110) 1 , selected because it represents one of the best examples of fast (∼700 km s −1 ) outflow of neutral hydrogen and ionized gas (Morganti et al 1998(Morganti et al , 2007 Fig. 1 for an overview) that is located at about 0.5 kpc from the nucleus and is coincident with the bright radio lobe (Oosterloo et al 2000).…”

Section: Introductionmentioning

confidence: 99%

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Tracing the extreme interplay between radio jets and the ISM in IC 5063

Morganti

Frieswijk

Oonk

et al. 2013

A&A

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We report the discovery with the Atacama Pathfinder EXperiment (APEX) of an outflow of molecular gas in the radio-loud Seyfert galaxy IC 5063 (z = 0.0110). In addition to the emission of the large-scale CO disk, a prominent blueshifted wing is observed in the CO(2−1) spectrum. IC 5063 represents one of the best cases of a fast jet-driven H I (and ionized gas) outflow, which is located at the site of a radio-bright feature about 0.5 kpc from the nucleus. It is possible that the blueshifted part of the molecular gas is associated with this outflow and is accelerated by the interaction with the radio jet. The outflow of molecular gas is characterized by an H 2 mass of the outflowing component of between 2.25±0.70×10 7 M and 1.29±0.40×10 8 M and a mass outflow rate between 22 and 129 M yr −1 depending on the assumption for α X and assuming a luminosity ratio L CO(2-1)/L CO(1-0) = 1. This confirms that this may indeed be the dominant component in outflows driven by the nuclear activity as also found in other objects. However, this high mass outflow rate cannot easily be supported for a long time, suggesting that the gas outflow in IC 5063 happens in bursts and is in a particularly strong phase at present. Owing to its proximity, IC 5063 serves as an excellent laboratory for understanding the impact of radio jets on the gas-rich inter-stellar medium.

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The impact of compact radio sources on their host galaxies: observations

Tadhunter

2016

Astron Nachr

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I review the observational evidence that CSS/GPS radio sources have a significant impact on the evolution of their host galaxies, particularly on the kpc‐scales of the galaxy bulges. Starting with an overview of the observational evidence for jet‐cloud interactions and warm ionised outflows in CSS/GPS sources, I then consider the challenges involved in quantifying the feedback effect of the warm outflows in terms of their mass outflow rates and kinetic powers. For the best‐observed cases it is shown that the warm outflows may have a major negative feedback effect in the very central regions, but probably lack the power to heat and eject the full cool ISM contents of the host galaxies. In contrast, the recently‐discovered neutral and molecular outflows are more massive and powerful and therefore carry more destructive potential. However, the feedback effect of such outflows is not necessarily negative: there is now clear observational evidence that the molecular outflows are formed as the hot, compressed gas cools behind fast shocks driven into the ISM by the relativistic jets. The natural endpoint of this process is the formation of stars. Therefore, jet‐induced star formation may be a significant process in CSS/GPS radio galaxies. Finally, I discuss whether CSS/GPS sources are “imposters” in flux‐limited radio samples, due the flux boosting of the radio sources by strong jet‐cloud interactions in the early stages of radio source evolution. (© 2016 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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A Radio Study of the Seyfert Galaxy IC 5063: Evidence for Fast Gas Outflow

Cited by 97 publications

References 61 publications

The fast molecular outflow in the Seyfert galaxy IC 5063 as seen by ALMA

The fast molecular outflow in the Seyfert galaxy IC 5063 as seen by ALMA

Tracing the extreme interplay between radio jets and the ISM in IC 5063

The impact of compact radio sources on their host galaxies: observations

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