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LOFAR discovery of rare large FR I jets in the low-luminosity radio galaxy NGC 5322

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dc.contributor.author Omar, Amitesh
dc.date.accessioned 2024-05-02T06:10:13Z
dc.date.available 2024-05-02T06:10:13Z
dc.date.issued 2022-11
dc.identifier.uri https://doi.org/10.1093/mnrasl/slac114
dc.identifier.uri http://localhost:8080/xmlui/handle/123456789/1548
dc.description.abstract The discovery of faint Fanaroff–Riley type I (FR I) radio jets in the elliptical galaxy NGC 5322 is reported here using the 144-MHz image from Data Release 2 of the Low-Frequency Array (LOFAR) Two-metre Sky Survey (LoTSS). The jets have an angular extent of ∼40 arcmin or a projected physical extent of ∼360 kpc. The faint jets remain well collimated and disappear in the intergalactic medium, without any detected hotspots or radio lobes. The relatively brighter jets, previously detected only up to the ∼21 kpc extent at higher frequencies, are within the optical extent of the galaxy. The jets become faint abruptly outside, where detection is made only in the LOFAR image. The total radio luminosity of the galaxy at 144 MHz is estimated to be (3.7 ± 0.4) × 1022 W Hz−1. The 144-MHz radio luminosity of the faint jets outside the optical extent is estimated to be (7.1 ± 2.0) × 1021 W Hz−1. The size of the jets is exceptionally large for the galaxy’s low radio luminosity, when compared with other radio galaxies. It makes NGC 5322 a rare radio galaxy, previously not detected in other radio surveys. A combined effect of stellar core depletion and low-density environment around the jets, which results in a weak entrainment of the material surrounding the jets, could be responsible for its large size despite a low radio luminosity. en_US
dc.language.iso en en_US
dc.publisher Monthly Notices of the Royal Astronomical Society Letters en_US
dc.relation.ispartofseries 1915;mnl517-81
dc.subject galaxies: active en_US
dc.subject intergalactic medium en_US
dc.subject radio continuum: galaxies en_US
dc.subject galaxies: nuclei en_US
dc.subject galaxies: jets en_US
dc.title LOFAR discovery of rare large FR I jets in the low-luminosity radio galaxy NGC 5322 en_US
dc.type Article en_US


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