We present a catalog of 47 wide-angle tailed radio galaxies (WATs), the WATCAT, mainly built including a radio morphological classification; WATs were selected by combining observations from the National Radio Astronomy Observatory/Very Large Array Sky Survey (NVSS), the Faint Images of the Radio Sky at Twenty-Centimeters (FIRST), and the Sloan Digital Sky Survey (SDSS). We included in the catalog only radio sources showing two-sided jets with two clear "warmspots" (i.e., jet knots as bright as 20% of the nucleus) lying on the opposite side of the radio core, and having classical extended emission resembling a plume beyond them. The catalog is limited to redshifts z ≤ 0.15, and lists only sources with radio emission extended beyond 30 kpc from the host galaxy. We found that host galaxies of WATCAT sources are all luminous (-20.5 ≳ Mr ≳ -23.7), red early-type galaxies with black hole masses in the range 108 ≲ MBH ≲ 109 M☉. The spectroscopic classification indicates that they are all low-excitation galaxies (LEGs). Comparing WAT multifrequency properties with those of FR I and FR II radio galaxies at the same redshifts, we conclude that WATs show multifrequency properties remarkably similar to FR I radio galaxies, having radio power of typical FR IIs.

WATCAT: a tale of wide-angle tailed radio galaxies

Missaglia, V.;Massaro, F.;PAOLILLO, MAURIZIO;Baldi, R. D.;Paggi, A.
2019-01-01

Abstract

We present a catalog of 47 wide-angle tailed radio galaxies (WATs), the WATCAT, mainly built including a radio morphological classification; WATs were selected by combining observations from the National Radio Astronomy Observatory/Very Large Array Sky Survey (NVSS), the Faint Images of the Radio Sky at Twenty-Centimeters (FIRST), and the Sloan Digital Sky Survey (SDSS). We included in the catalog only radio sources showing two-sided jets with two clear "warmspots" (i.e., jet knots as bright as 20% of the nucleus) lying on the opposite side of the radio core, and having classical extended emission resembling a plume beyond them. The catalog is limited to redshifts z ≤ 0.15, and lists only sources with radio emission extended beyond 30 kpc from the host galaxy. We found that host galaxies of WATCAT sources are all luminous (-20.5 ≳ Mr ≳ -23.7), red early-type galaxies with black hole masses in the range 108 ≲ MBH ≲ 109 M☉. The spectroscopic classification indicates that they are all low-excitation galaxies (LEGs). Comparing WAT multifrequency properties with those of FR I and FR II radio galaxies at the same redshifts, we conclude that WATs show multifrequency properties remarkably similar to FR I radio galaxies, having radio power of typical FR IIs.
2019
626
A8
1
https://www.aanda.org/articles/aa/pdf/2019/06/aa35058-19.pdf
galaxies: active; galaxies: jets; radio continuum: galaxies
Missaglia, V.; Massaro, F.; Capetti, A.; Paolillo, M.; Kraft, R. P.; Baldi, R. D.; Paggi, A.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/1712203
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