2025MNRAS.543..285M

Query : 2025MNRAS.543..285M

2025MNRAS.543..285M - Mon. Not. R. Astron. Soc., 543, 285-291 (2025/October-2)

HI gas in the rejuvenated radio galaxy PKS 2014-55.

MTSHWENI L.K., THORAT K., DEANE R.P., FRANK B.S., MACCAGNI F.M., JOZSA G.I., COTTON W.D., GIRI G., WHITE S.V., ATEMKENG M., BESTER H.L., FANAROFF B.L., HEYWOOD I., LAWRIE G., MANAMELA T.E., MAGOLEGO I., MAUCH T., OOZEER N., SMIRNOV O. and KUPA M.S.

Abstract (from CDS):

We present new high-spectral-resolution MeerKAT observations of $\textrm {H}\, \scriptstyle \mathrm{I}$ absorption against the central region of the restarted, giant, X-shaped radio galaxy PKS2014-55, which exhibits morphological evidence of three distinct cycles of activity. We report a wide component (FWHM 38 $\pm$ 7 km $\text{s}^{-1}$) redshifted to 96 $\pm$ 50 km $\text{s}^{-1}$, a deep-narrow detection (FWHM 19 $\pm$ 6 km $\text{s}^{-1}$) which is redshifted to 160 $\pm$ 40 km$\text{s}^{-1}$, and a shallow component (FWHM 22 $\pm$ 6 km$\text{s}^{-1}$) redshifted to 240 $\pm$ 40 km $\text{s}^{-1}$. One of the three components exceeds the typical rotational velocity of 100 km $\text{s}^{-1}$, suggesting complex kinematics of the inflowing gas. These $\textrm {H}\, \scriptstyle \mathrm{I}$ observations support the correlation between the occurrence of $\textrm {H}\, \scriptstyle \mathrm{I}$ absorption and the rejuvenation of radio activity.

Abstract Copyright: © The Author(s) 2025. Published by Oxford University Press on behalf of Royal Astronomical Society.

Journal keyword(s): galaxies: active - galaxies: individual: PKS 2014-55 - galaxies: ISM

Simbad objects: 5

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Number of rows : 5
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NGC 1167 LIN 03 01 42.3322774176 +35 12 20.300948892   13.84 12.77     ~ 382 1
2 Z 150-14 Sy2 08 40 02.336 +29 49 02.73   20.00 19.62     ~ 209 1
3 3C 236.0 BLL 10 06 01.75023017 +34 54 10.4016113   15.97       ~ 473 2
4 ICRF J193925.0-634245 Sy2 19 39 25.0245304992 -63 42 45.640373400   18.87 18.37 17.64   ~ 1332 2
5 LEDA 64440 Sy2 20 18 01.2940411824 -55 39 31.590064800   15.5       ~ 91 0

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