2017
DOI: 10.1051/0004-6361/201730940
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LOFAR MSSS: The scaling relation between AGN cavity power and radio luminosity at low radio frequencies

Abstract: We present a new analysis of the widely used relation between cavity power and radio luminosity in clusters of galaxies with evidence for strong AGN feedback. We study the correlation at low radio frequencies using two new surveys -the First Alternative Data Release of the TIFR GMRT Sky Survey (TGSS ADR1) at 148 MHz and LOFAR's first all-sky survey, the Multifrequency Snapshot Sky Survey (MSSS) at 140 MHz. We find a scaling relation P cav ∝ L β 148 , with a logarithmic slope of β = 0.51 ± 0.14, which is in goo… Show more

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Cited by 14 publications
(5 citation statements)
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“…By comparing the feedback energy obtained for various modes from our work with that from actual observations, we can comment on the feedback modes that are at play in the real universe. Previous studies have been done to measure the feedback energy estimated from the X-ray cavities produced by the AGN (Bîrzan et al 2004(Bîrzan et al , 2008Rafferty et al 2006;Kokotanekov et al 2017). Our results show an agreement with the energy scale at low redshift obtained from these observations.…”
Section: Reconstruction Of Feedback Energysupporting
confidence: 89%
“…By comparing the feedback energy obtained for various modes from our work with that from actual observations, we can comment on the feedback modes that are at play in the real universe. Previous studies have been done to measure the feedback energy estimated from the X-ray cavities produced by the AGN (Bîrzan et al 2004(Bîrzan et al , 2008Rafferty et al 2006;Kokotanekov et al 2017). Our results show an agreement with the energy scale at low redshift obtained from these observations.…”
Section: Reconstruction Of Feedback Energysupporting
confidence: 89%
“…Both ionized gas and cold molecular gas components wrap around the radio jet and the X-ray cavities (Tremblay et al 2016), and the cospatial and comoving warm ionized and cold molecular components are consistent with a scenario of chaotic cold accretion, precipitation, and stimulated feedback (Tremblay et al 2018). A ghost cavity at 330 MHz was also detected (Kokotanekov et al 2017). G4Jy 1854: is a lobe-dominated radio QSO having a steep radio spectrum and emission line in its optical spectrum that, if interpreted as Mg II, suggests a redshift estimate of z = 1.39 (Thompson et al 1990).…”
Section: Appendix a Notes On Individual Sourcessupporting
confidence: 52%
“…We note that LOFAR snapshot observations of MS0735 has already been shown by Kokotanekov et al (2017). This observation was performed during the first LOFAR all-sky survey, the Multifrequency Snapshot Sky Survey (MSSS; see Heald et al 2015).…”
Section: Ms 07356+7421mentioning
confidence: 74%