# WATCAT: a tale of wide-angle tailed radio galaxies

## TL;DR

This paper introduces WATCAT, a catalog of 47 wide-angle tailed radio galaxies selected through multi-survey data, revealing their host galaxies are luminous, red, early-type with low-excitation spectra, and similar to FRI radio galaxies in multifrequency properties.

## Contribution

The paper provides the first comprehensive catalog of WATs with detailed morphological and host galaxy properties, enabling better understanding of their nature and relation to other radio galaxy classes.

## Key findings

- WAT host galaxies are luminous, red, early-type with massive black holes.
- WATs exhibit multifrequency properties similar to FRI radio galaxies.
- The catalog includes only sources with extended radio emission beyond 30 kpc.

## Abstract

We present a catalog of 47 wide-angle tailed radio galaxies (WATs), the WATCAT; these galaxies 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), and mainly built including a radio morphological classification. 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 $\leq$ 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 $\gtrsim$ Mr $\gtrsim$ -23.7), red early-type galaxies with black hole masses in the range $10^8\lesssim $ M$_{\rm BH} \lesssim 10^9$ M$_\odot$. The spectroscopic classification indicates that they are all low-excitation galaxies (LEGs). Comparing WAT multifrequency properties with those of FRI and FRII radio galaxies at the same redshifts, we conclude that WATs show multifrequency properties remarkably similar to FRI radio galaxies, having radio power of typical FRIIs.