Radio Sources Associated with Optical Galaxies and Having Unresolved or Extended Morphologies (ROGUE). I. A Catalog of SDSS Galaxies with FIRST Core Identifications

Kozieł-Wierzbowska, D.; Goyal, A.; Żywucka, N.

doi:10.3847/1538-4365/ab63d3

Cited by 26 publications

(17 citation statements)

References 93 publications

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“…The radio core of the DDRG coincides with an optical galaxy with an r-band magnitude of 16.36. This source has been classified as a DDRG by Kozieł-Wierzbowska et al (2020). SAGANJ114427.19+370831.87.…”

Section: Appendix A: Additional Tablesmentioning

confidence: 99%

“…A winged back-flow is observed to emanate from the northern hotspot, but no such feature is seen near the southern hotspot. However, this source has been classified as an X-shaped radio galaxy by Kozieł-Wierzbowska et al (2020). SAGANJ225321.28+162016.77.…”

Section: Appendix A: Additional Tablesmentioning

confidence: 99%

“…Over a course of about 45 years, about 40 research papers (Willis et al 1974;Bridle et al 1976;Waggett et al 1977;Laing et al 1983;Kronberg et al 1986;de Bruyn 1989;Jones 1989;Ekers et al 1989;Lacy et al 1993;Law-Green et al 1995;Cotter et al 1996;McCarthy et al 1996;Subrahmanyan et al 1996;Ishwara-Chandra & Saikia 1999;Lara et al 2001;Machalski et al 2001Machalski et al , 2007Machalski et al , 2008Kozieł-Wierzbowska & Stasińska 2011;Schoenmakers et al 2001;Sadler et al 2002;Letawe et al 2004;Saripalli et al 2005;Saikia et al 2006;Huynh et al 2007;Hota et al 2011;Solovyov & Verkhodanov 2014;Molina et al 2014;Bagchi et al 2014;Amirkhanyan et al 2015;Tamhane et al 2015; Amirkhanyan 2016; Dabhade et al 2017Dabhade et al , 2020Clarke et al 2017;Kapińska et al 2017;Prescott et al 2018;Sebastian et al 2018;Kuźmicz et al 2018;Kozieł-Wierzbowska et al 2020) have reported about 662 GRGs spread throughout the sky. This estimate is based on a database of GRGs ...…”

Section: Introductionmentioning

confidence: 99%

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Search and analysis of giant radio galaxies with associated nuclei (SAGAN)

Dabhade

Mahato

Bagchi

et al. 2020

A&A

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We present the first results of a project called SAGAN, which is dedicated solely to the studies of relatively rare megaparsec-scale radio galaxies in the Universe, called giant radio galaxies (GRGs). We have identified 162 new GRGs primarily from the NRAO VLA Sky Survey with sizes ranging from ∼0.71 Mpc to ∼2.82 Mpc in the redshift range of ∼0.03−0.95, of which 23 are hosted by quasars (giant radio quasars). As part of the project SAGAN, we have created a database of all known GRGs, the GRG catalogue, from the literature (including our new sample); it includes 820 sources. For the first time, we present the multi-wavelength properties of the largest sample of GRGs. This provides new insights into their nature. Our results establish that the distributions of the radio spectral index and the black hole mass of GRGs do not differ from the corresponding distributions of normal-sized radio galaxies (RGs). However, GRGs have a lower Eddington ratio than RGs. Using the mid-infrared data, we classified GRGs in terms of their accretion mode: either a high-power radiatively efficient high-excitation state, or a radiatively inefficient low-excitation state. This enabled us to compare key physical properties of their active galactic nuclei, such as the black hole mass, spin, Eddington ratio, jet kinetic power, total radio power, magnetic field, and size. We find that GRGs in high-excitation state statistically have larger sizes, stronger radio power, jet kinetic power, and higher Eddington ratio than those in low-excitation state. Our analysis reveals a strong correlation between the black hole Eddington ratio and the scaled jet kinetic power, which suggests a disc-jet coupling. Our environmental study reveals that ∼10% of all GRGs may reside at the centres of galaxy clusters, in a denser galactic environment, while the majority appears to reside in a sparse environment. The probability of finding the brightest cluster galaxy as a GRG is quite low and even lower for high-mass clusters. We present new results for GRGs that range from black hole mass to large-scale environment properties. We discuss their formation and growth scenarios, highlighting the key physical factors that cause them to reach their gigantic size.

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Section: Appendix A: Additional Tablesmentioning

confidence: 99%

Section: Appendix A: Additional Tablesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Search and analysis of giant radio galaxies with associated nuclei (SAGAN)

Dabhade

Mahato

Bagchi

et al. 2020

A&A

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“…All-sky Aitoff projection of the distribution of our newly discovered GRS in red, together with the GRS from six major published GRS lists, which are in black from [5], in orange from [15], in dark blue from [59], in dark green from [60], in dark magenta from [16], and in dark red from [46]. The thick blue line shows the area within |b| ≤ 2 • from the Galactic plane.…”

Section: Determination Of Radio Flux Densities and Luminositiesmentioning

confidence: 99%

Discovery of 178 Giant Radio Galaxies in 1059 deg2 of the Rapid ASKAP Continuum Survey at 888 MHz

2021

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We report the results of a visual inspection of images of the Rapid ASKAP Continuum Survey (RACS) in search of extended radio galaxies (ERG) that reach or exceed linear sizes on the order of one Megaparsec. We searched a contiguous area of 1059 deg2 from RAJ = 20h20m to 06h20m, and −50∘<DecJ<−40∘, which is covered by deep multi-band optical images of the Dark Energy Survey (DES) and in which previously only three ERGs larger than 1 Mpc had been reported. For over 1800 radio galaxy candidates inspected, our search in optical and infrared images resulted in hosts for 1440 ERG, for which spectroscopic and photometric redshifts from various references were used to convert their largest angular size (LAS) to projected linear size (LLS). This resulted in 178 newly discovered giant radio sources (GRS) with LLS >1 Mpc, of which 18 exceed 2 Mpc and the largest one is 3.4 Mpc. Their redshifts range from 0.02 to ∼2.0, but only 10 of the 178 new GRS have spectroscopic redshifts. For the 146 host galaxies, the median r-band magnitude and redshift are 20.9 and 0.64, while for the 32 quasars or candidates these are 19.7 and 0.75. Merging the six most recent large compilations of GRS results in 458 GRS larger than 1 Mpc, so we were able to increase this number by ∼39% to 636.

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“…Recently, the first part of a catalogue of Radio sources associated with Optical Galaxies and having Unresolved or Extended morphologies (ROGUE I) has been published by Kozie l-Wierzbowska et al (2020). It contains 32,616 spectroscopically selected galaxies from the Sloan Digital Sky Survey (SDSS; York et al 2000) that have core identifications in the First Images of Radio Sky at Twenty Centimetre survey (FIRST: Becker et al 1995, http://sundog.stsci.edu).…”

Section: Introductionmentioning

confidence: 99%

Radio galaxies with and without emission lines

Stasińska¹,

Asari

Kozieł-Wierzbowska

2019

Proc. IAU

Self Cite

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Using the recent ROGUE I catalogue of galaxies with radio cores (Kozie_l-Wierzbowska et al. 2020) and after selecting the objects which are truly radio active galactic nuclei, AGNs, (which more than doubles the samples available so far), we perform a thorough comparison of the properties of radio galaxies with and without optical emission lines (galaxies where the equivalent width of Hα is smaller than 3Å are placed in the last category). We do not find any strong dichotomy between the two classes as regards the radio luminosities or black hole masses. The same is true when using the common classification into high- and low-excitation radio galaxies (HERGs and LERGs respectively).

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Radio Sources Associated with Optical Galaxies and Having Unresolved or Extended Morphologies (ROGUE). I. A Catalog of SDSS Galaxies with FIRST Core Identifications

Cited by 26 publications

References 93 publications

Search and analysis of giant radio galaxies with associated nuclei (SAGAN)

Search and analysis of giant radio galaxies with associated nuclei (SAGAN)

Discovery of 178 Giant Radio Galaxies in 1059 deg2 of the Rapid ASKAP Continuum Survey at 888 MHz

Radio galaxies with and without emission lines

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