Centaurus A: constraints on the nature of the giant lobe filaments from<i>XMM-Newton</i>observations

Wykes, S.; Hardcastle, M. J.; Croston, J. H.

doi:10.1093/mnras/stv2187

Cited by 4 publications

(3 citation statements)

References 60 publications

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“…Feain et al 2011, Stawarz et al 2013, Stefan et al 2013, Wykes et al 2013, Eilek 2014. Spatiallyvarying magnetic field strengths could also be a factor in the discrepancy between the dynamical and spectral ages of the outer lobes (Wykes et al 2015b).…”

Section: The Morphology and Spectral Properties Of The Outer Lobesmentioning

confidence: 99%

The jet/wind outflow in Centaurus A: a local laboratory for AGN feedback

McKinley

Tingay

Carretti

et al. 2017

Monthly Notices of the Royal Astronomical Society

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We present new radio and optical images of the nearest radio galaxy Centaurus A and its host galaxy NGC 5128. We focus our investigation on the northern transition region, where energy is transported from the ∼5 kpc (∼5 arcmin) scales of the Northern Inner Lobe (NIL) to the ∼30 kpc (∼30 arcmin) scales of the Northern Middle Lobe (NML). Our Murchison Widefield Array observations at 154 MHz and our Parkes radio telescope observations at 2.3 GHz show diffuse radio emission connecting the NIL to the NML, in agreement with previous Australia Telescope Compact Array observations at 1.4 GHz. Comparison of these radio data with our widefield optical emission line images show the relationship between the NML radio emission and the ionised filaments that extend north from the NIL, and reveal a new ionised filament to the east, possibly associated with a galactic wind. Our deep optical images show clear evidence for a bipolar outflow from the central galaxy extending to intermediate scales, despite the non-detection of a southern radio counterpart to the NML. Thus, our observational overview of Centaurus A reveals a number of features proposed to be associated with AGN feedback mechanisms, often cited as likely to have significant effects in galaxy evolution models. As one of the closest galaxies to us, Centaurus A therefore provides a unique laboratory to examine feedback mechanisms in detail.

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Section: The Morphology and Spectral Properties Of The Outer Lobesmentioning

confidence: 99%

The jet/wind outflow in Centaurus A: a local laboratory for AGN feedback

McKinley

Tingay

Carretti

et al. 2017

Monthly Notices of the Royal Astronomical Society

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“…From the radio morphology of the lobes, Cen A is classified as being Fanaroff-Riley type I (Fanaroff & Riley 1974). In fact, the Cen A jet has been detected and extensively studied across the whole electromagnetic spectrum, from radio to γ-rays (Hardcastle et al 2003;Worrall et al 2008;Abdo et al 2010;Müller et al 2014;Wykes et al 2015;Janssen et al 2021). In 2004, the source was first detected at TeV energies by the High Energy Stereoscopic System (Aharonian et al 2009), and later by the Fermi Large Area Telescope (Fermi/LAT) at GeV energies (Abdo et al 2010).…”

Section: Introductionmentioning

confidence: 99%

Hard X-Ray Emission in Centaurus A

Rani

Mundo

Mushotzky

et al. 2022

ApJ

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We use 13 yr of Swift/BAT observations to probe the nature and origin of the hard X-ray (14–195 KeV) emission in Centaurus A. Since the beginning of the Swift operation in 2004, significant X-ray variability in the 14–195 KeV band has been detected, with mild changes in the source spectrum. Spectral variations became more eminent after 2013, following a softer-when-brighter trend. Using the power spectral density (PSD) method, we find that the observed hard X-ray photon flux variations are consistent with a red-noise process of slope, −1.3, with no evidence for a break in the PSD. We find a significant correlation between the hard X-ray and 230 GHz radio flux variations, with no time delay longer than 30 days. The temporal and spectral analysis confirms that the X-ray emission generated by the accretion in the ADAF model is sub-dominant as compared with the emission arsiing from that produced by the inner regions of the radio jet.

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“…Morganti, 2010 andrefs. therein, also Tingay &Lenc, 2009;Neff et al, 2015;Wykes et al, 2015b;McKinley et al, 2018), MHD instabilities (Wykes et al, 2014), astrophysical shocks and particle acceleration processes (e.g. Croston et al, 2009;Crockett et al, 2012;Wykes et al, 2015a), and more.…”

Section: Introductionmentioning

confidence: 99%

The Extraordinary Linear Polarisation Structure of the Southern Centaurus A Lobe Revealed by ASKAP

et al. 2018

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We present observations of linear polarisation in the southern radio lobe of Centaurus A, conducted during commissioning of the Australian Square Kilometre Array Pathfinder (ASKAP) telescope. We used 16 antennas to observe a 30 square degree region in a single 12 hour pointing over a 240 MHz band centred on 913 MHz. Our observations achieve an angular resolution of 26 × 33 arcseconds (480 parsecs), a maximum recoverable angular scale of 30 arcminutes, and a full-band sensitivity of 85 µJy beam −1 . The resulting maps of polarisation and Faraday rotation are amongst the most detailed ever made for radio lobes, with of order 10 5 resolution elements covering the source. We describe several as-yet unreported observational features of the lobe, including its detailed peak Faraday depth structure, and intricate networks of depolarised filaments. These results demonstrate the exciting capabilities of ASKAP for widefield radio polarimetry.

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Centaurus A: constraints on the nature of the giant lobe filaments fromXMM-Newtonobservations

Cited by 4 publications

References 60 publications

The jet/wind outflow in Centaurus A: a local laboratory for AGN feedback

The jet/wind outflow in Centaurus A: a local laboratory for AGN feedback

Hard X-Ray Emission in Centaurus A

The Extraordinary Linear Polarisation Structure of the Southern Centaurus A Lobe Revealed by ASKAP

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