2016A&A...593L..19M


C.D.S. - SIMBAD4 rel 1.7 - 2020.02.25CET11:12:13

2016A&A...593L..19M - Astronomy and Astrophysics, volume 593, L19-19 (2016/9-1)

The MHz-peaked radio spectrum of the unusual γ-ray source PMN J1603-4904.

MUELLER C., BURD P.R., SCHULZ R., COPPEJANS R., FALCKE H., INTEMA H., KADLER M., KRAUSS F. and OJHA R.

Abstract (from CDS):

Context. The majority of bright extragalactic γ-ray sources are blazars. Only a few radio galaxies have been detected by Fermi/LAT. Recently, the GHz-peaked spectrum source PKS 1718-649 was confirmed to be γ-ray bright, providing further evidence for the existence of a population of γ-ray loud, compact radio galaxies. A spectral turnover in the radio spectrum in the MHz to GHz range is a characteristic feature of these objects, which are thought to be young due to their small linear sizes. The multiwavelength properties of the γ-ray source PMN J1603-4904 suggest that it is a member of this source class.
Aims. The known radio spectrum of PMN J1603-4904 can be described by a power law above 1 GHz. Using observations from the Giant Metrewave Radio Telescope (GMRT) at 150, 325, and 610 MHz, we investigate the behavior of the spectrum at lower frequencies to search for a low-frequency turnover.
Methods. Data from the TIFR GMRT Sky Survey (TGSS ADR) catalog and archival GMRT observations were used to construct the first MHz to GHz spectrum of PMN J1603-4904.
Results. We detect a low-frequency turnover of the spectrum and measure the peak position at about 490MHz (rest-frame), which, using the known relation of peak frequency and linear size, translates into a maximum linear source size of ∼1.4kpc.
Conclusions. The detection of the MHz peak indicates that PMN J1603-4904 is part of this population of radio galaxies with turnover frequencies in the MHz to GHz regime. Therefore it can be considered the second confirmed object of this kind detected in γ-rays. Establishing this γ-ray source class will help to investigate the γ-ray production sites and to test broadband emission models.

Abstract Copyright: © ESO, 2016

Journal keyword(s): galaxies: active - galaxies: jets - galaxies: individual: PMN J1603-4904

Simbad objects: 13

goto Full paper

goto View the reference in ADS

Number of rows : 13

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 PKS 0008-42 Rad 00 10 52.51972 -41 53 10.7911   22.0       ~ 64 1
2 4C 55.01 Rad 00 15 26.50 +56 03 58.8           ~ 4 1
3 NGC 1316 GiP 03 22 41.789 -37 12 29.52 9.81 9.15 8.53 7.66   ~ 1178 1
4 4C 39.23A QSO 08 24 55.48385101 +39 16 41.9040901   18.55 18.21 17.20   ~ 164 1
5 4C 39.23B rG 08 25 23.7 +39 19 45   17.0       ~ 36 1
6 NAME Centaurus A Sy2 13 25 27.61509104 -43 01 08.8056025   8.18 6.84 6.66   ~ 3937 3
7 3FGL J1330.5+3023 gam 13 30 33 +30 23.3           ~ 6 0
8 3C 286 Sy1 13 31 08.2885060664 +30 30 32.960825108   17.51 17.25     ~ 3660 1
9 QSO B1413+135 BLL 14 15 58.81750938 +13 20 23.7129069   21.055 20.000 18.461   ~ 372 1
10 PMN J1603-4904 QSO 16 03 50.690 -49 04 05.49   20.67       ~ 51 0
11 PSR B1600-49 Psr 16 04 22.999 -49 09 58.34           ~ 58 0
12 NGC 6328 QSO 17 23 41.02938963 -65 00 36.6113150   13.17 13.2 11.45 12.2 ~ 198 1
13 QSO B2232+282 BLL 22 36 22.4706694778 +28 28 57.412050821   19.1 19.0 17.60   ~ 216 1

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2016A&A...593L..19M and select 'bookmark this link' or equivalent in the popup menu


2020.02.25-11:12:13

© Université de Strasbourg/CNRS

    • Contact