Duty cycle of the radio galaxy B2 0258+35

Brienza, M.; Morganti, Raffaella; Murgia, M.; Vilchez, N.; Adebahr, B.; Carretti, E.; Concu, R.; Govoni, F.; Harwood, J. J.; Intema, H. T.; Loi, F.; Melis, A.; Paladino, R.; Poppi, S.; Shulevski, A.; Vacca, V.; Valente, G.

doi:10.1051/0004-6361/201832846

Cited by 44 publications

(62 citation statements)

References 128 publications

(173 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This asymmetry both in brightness and morphology suggests an interaction with the ISM, similar to that seen in IC 5063 ). The age of B2 0258+35 is estimated to be between 0.4 Myr (Brienza et al 2018) and 0.9 Myr (Giroletti et al 2005). Following the correlation between the age and the size of the source (Orienti & Dallacasa 2014;Murgia 2003), it has also been found that the source is smaller than expected for this age, given an unconstrained expansion.…”

Section: Introductionmentioning

confidence: 92%

“…Following the correlation between the age and the size of the source (Orienti & Dallacasa 2014;Murgia 2003), it has also been found that the source is smaller than expected for this age, given an unconstrained expansion. This suggests that it may have been confined within the host galaxy for a protracted length of time (Brienza et al 2018). However, we note that a hypothesis based on the above-mentioned correlations alone is quite uncertain, but as we show in the subsequent sections, the H i absorption and CO emission studies further strengthen this hypothesis.…”

Section: Introductionmentioning

confidence: 99%

“…The host galaxy, NGC 1167, was further found to host largescale (∼ 240 kpc) extremely low surface brightness radio lobes (Shulevski et al 2012), about ∼ 110 Myr old (Brienza et al 2018), which make up only 3% of the total source luminosity (4.75 mJy arcmin −2 at 145 MHz). Though such low surface brightness may imply that these structures are remnants of a previous activity, their spectral indices have been found to be 'normal' and not ultra-steep as expected for these sources (Brienza et al 2018).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Feedback from low-luminosity radio galaxies: B2 0258+35

Murthy

Morganti

Oosterloo

et al. 2019

A&A

View full text Add to dashboard Cite

Low-luminosity radio-loud active galactic nuclei (AGN) are of importance in studies concerning feedback from radio AGN since a dominant fraction of AGN belong to this class. We report high-resolution Very Large Array (VLA) and European VLBI Network (EVN) observations of H i 21cm absorption from a young, compact steep-spectrum radio source, B2 0258+35, nested in the early-type galaxy NGC 1167, which contains a 160 kpc H i disc. Our VLA and EVN H i absorption observations, modelling, and comparison with molecular gas data suggest that the cold gas in the centre of NGC 1167 is very turbulent (with a velocity dispersion of ∼ 90 km s −1 ) and that this turbulence is induced by the interaction of the jets with the interstellar medium (ISM). Furthermore, the ionised gas in the galaxy shows evidence of shock heating at a few kpc from the radio source. These findings support the results from numerical simulations of radio jets expanding into a clumpy gas disc, which predict that the radio jets in this case percolate through the gas disc and drive shocks into the ISM at distances much larger than their physical extent. These results expand the number of low-luminosity radio sources found to impact the surrounding medium, thereby highlighting the possible relevance of these AGN for feedback.

show abstract

Section: Introductionmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Feedback from low-luminosity radio galaxies: B2 0258+35

Murthy

Morganti

Oosterloo

et al. 2019

A&A

View full text Add to dashboard Cite

show abstract

“…Among recent ones, Konar et al (2013) studied two double-double RG (J0116-4722 and J1158+2621), concluding that the eldest couple of lobes are the result of an active phase that lasted ∼100 Myr on average, with a quiescent period of about 1 Myr before the AGN reignited into the second phase. Brienza et al (2018) investigated the spectral properties of the outer lobes of another known double-double RG (B2 0258+35), finding that either they are still fueled, or the jets feeding them switched off less than ∼10 Myr ago. In other cases, a longer pause between the two phases has been found (∼100 Myr, Jamrozy et al 2007).…”

Section: Final Remarksmentioning

confidence: 99%

Hard X-ray selected giant radio galaxies – II. Morphological evidence of restarted radio activity

Bruni

Panessa

Bassani³

et al. 2020

Monthly Notices of the Royal Astronomical Society

View full text Add to dashboard Cite

About 6% of Radio Galaxies (RG) can reach linear sizes larger than 0.7 Mpc, and are then classified as Giant Radio Galaxies (GRG). The conditions that make possible the formation of such big structures is still not clear -either core accretion properties or environmental factors. Recent studies have shown that GRG can be up to four times more abundant in hard X-ray selected (i.e. from INTEGRAL/IBIS and Swift/BAT at >20 keV) RG samples. Moreover, a high fraction of young radio sources found in their cores suggests a recently restarted activity, as suggested from the discrepancy between the measured jet and lobes power, with respect to the one expected from core X-ray luminosity. Here we present a radio morphological study of a sample of 15 hard X-ray selected GRG, discussing low-frequency images from our GMRT campaign complemented with others from the literature: among them, 7/15 show evidence of restarted radio activity either in the form of double-double/X-shaped morphology, or as a cocoon emission embedding more recent jets. This, together with the objects from this sample already found hosting a young radio source in their core, suggests that at least 13 over 15 of these hard X-ray selected GRG show features which are consistent with the possibility of restarted radio activity.

show abstract

“…Also among extended radio sources and radio galaxies there are cases which present a number of similarities with NGC 3998. Some examples have been discussed in Brienza et al (2018). In particular it is worth mentioning B2 0258+35 and Cen A as two cases of low-power radio galaxies with a very high surface brightness contrast between the central regions and the large scales lobes.…”

Section: Relevance and Connection With Other Sourcesmentioning

confidence: 99%

LOFAR view of NGC 3998, a sputtering AGN

Sridhar

Morganti

Nyland

et al. 2020

A&A

View full text Add to dashboard Cite

Low-power radio sources dominate the radio sky. They tend to be small in size and core-dominated, but the origin of their properties and the evolution of their radio plasma are not well constrained. Interestingly, there is mounting evidence that low-power radio sources can significantly impact their surrounding gaseous medium and, therefore, may be more relevant for galaxy evolution than previously thought. In this paper, we present low radio frequency observations obtained with LOFAR at 147 MHz of the radio source hosted by NGC 3998. This is a rare example of a low-power source which is extremely core-dominated, but which has two large-scale lobes of low surface brightness. We combine the new 147 MHz image with available 1400 MHz data to derive the spectral index over the source. Despite the low surface brightness, reminiscent of remnant structures, the lobes show an optically thin synchrotron spectral index (∼ 0.6). We interpret this as being due to rapid decollimation of the jets close to the core, to high turbulence of the plasma flow, and entrainment of thermal gas. This could be the result of intermittent activity of the central AGN, or, more likely, temporary disruption of the jet due to the interaction of the jet with the rich circumnuclear ISM. Both would result in sputtering energy injection from the core which would keep the lobes fed, albeit at a low rate. We discuss these results in connection with the properties of low-power radio sources in general. Our findings show that amorphous, low surface brightness lobes should not be interpreted, by default, as remnant structures. Large, deep surveys (in particular the LOFAR 150 MHz LoTSS and the recently started 1400 MHz Apertif survey) will identify a growing number of objects similar to NGC 3998 where these ideas can be further tested.

show abstract

Duty cycle of the radio galaxy B2 0258+35

Cited by 44 publications

References 128 publications

Feedback from low-luminosity radio galaxies: B2 0258+35

Feedback from low-luminosity radio galaxies: B2 0258+35

Hard X-ray selected giant radio galaxies – II. Morphological evidence of restarted radio activity

LOFAR view of NGC 3998, a sputtering AGN

Contact Info

Product

Resources

About