2022MNRAS.509.2869R


Query : 2022MNRAS.509.2869R

2022MNRAS.509.2869R - Mon. Not. R. Astron. Soc., 509, 2869-2884 (2022/January-2)

The variability of brightest cluster galaxies at high radio frequencies.

ROSE T., EDGE A., KIEHLMANN S., BAEK J., CHUNG A., JUNG T.-H., KIM J.-W., READHEAD A.C.S. and SEDGEWICK A.

Abstract (from CDS):

Variability of a galaxy's core radio source can be a significant consequence of active galactic nucleus accretion. However, this variability has not been well studied, particularly at high radio frequencies. As such, we report on a campaign monitoring the high radio frequency variability of 20 nearby, cool-core brightest cluster galaxies. From our representative sample, we show that most vary significantly on time-scales of approximately 1 yr and longer. Our highest cadence observations are at 15 GHz and are from the Owens Valley Radio Observatory. They have a median time interval of 7 d and mostly span between 8 and 13 yr. We apply a range of variability detection techniques to the sources' light curves to analyse changes on week to decade long time-scales. Most notably, at least half of the sources show 20 per cent peak to trough variability on 3 yr time-scales, while at least a third vary by 60 per cent on 6 yr time-scales. Significant variability, which is important to studies of the Sunyaev-Zel'dovich Effect in the radio/sub-mm, is therefore a common feature of these sources. We also show how the variability relates to spectral properties at frequencies of up to 353 GHz using data from the Korean VLBI network, the NIKA2 instrument of the IRAM 30-m telescope, and the SCUBA-2 instrument of the James Clerk Maxwell Telescope.

Abstract Copyright: © 2021 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society

Journal keyword(s): galaxies: clusters: general - radio continuum: galaxies

Simbad objects: 30

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Number of rows : 30
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 2MAXI J0134-082 ClG 01 32 41.1 -08 04 06           ~ 17 0
2 ACO 3112 ClG 03 17 52.4 -44 14 35           ~ 298 1
3 ACO 426 ClG 03 19 47.2 +41 30 47           ~ 2116 1
4 3C 84 Sy2 03 19 48.1599902040 +41 30 42.108850836   13.10 12.48 11.09   ~ 3805 3
5 BAX 069.7593+05.3453 ClG 04 39 02.2 +05 20 43           ~ 73 0
6 ACO 3392 ClG 06 27 05.6 -35 29 30           ~ 33 2
7 ACO 646 ClG 08 22 10.0 +47 05 58           ~ 96 1
8 ICRF J083454.9+553421 Sy2 08 34 54.9022011432 +55 34 21.085082256   20.75 19.45 17.180   ~ 268 2
9 ACO 1348 ClG 11 41 24.0 -12 16 00           ~ 63 0
10 3C 264.0 QSO 11 45 05.0096246784 +19 36 22.731608448   14.98 13.97     ~ 565 2
11 ACO 1644 ClG 12 57 11.6 -17 24 34           ~ 346 1
12 3C 286 Sy1 13 31 08.2883506368 +30 30 32.960091564   17.51 17.25     ~ 4115 2
13 ICRF J135022.1+094010 Sy1 13 50 22.1335181520 +09 40 10.630143156   16.0 15.0 12.40   ~ 44 0
14 ACO 3581 ClG 14 07 29.8 -27 01 04           ~ 175 3
15 ACO S 780 ClG 14 59 29.1 -18 10 45           ~ 70 0
16 ACO 2052 ClG 15 16 45.5 +07 00 01           ~ 703 1
17 ACO 2055 ClG 15 18 41.30 +06 12 39.6           ~ 101 0
18 RXC J1558.3-1410 ClG 15 58 22.0 -14 09 59           ~ 29 0
19 [VV2006] J160338.0+155403 QSO 16 03 38.06194126 +15 54 02.3552149   18.5 13.97 12.15   ~ 60 2
20 ZwCl 1715+4229 ClG 17 17 19.20 +42 26 59.0           ~ 45 0
21 6C 172625+551254 BLL 17 27 23.4667856472 +55 10 53.570760528   20.84 19.77 17.15   ~ 54 3
22 ZwCl 1742+3306 ClG 17 44 16.2753 +32 59 55.115           ~ 67 0
23 2MASX J17453776+3951309 BLL 17 45 37.7544298992 +39 51 30.936584340     18.30 15.9   ~ 46 1
24 MCXC J1832.5+6848 ClG 18 32 34.6 +68 48 12           ~ 17 0
25 GRS G081.70 +00.50 SFR 20 39 01.6 +42 19 38           O4.5 1009 0
26 ACO 2390 ClG 21 53 34.6 +17 40 11           ~ 653 2
27 ACO 2415 ClG 22 05 25.0 -05 35 23           ~ 110 1
28 ACO 3880 ClG 22 27 49.5 -30 34 40           ~ 91 2
29 ACO 2627 ClG 23 36 42.2 +23 55 29           ~ 43 0
30 1RXS J234106.1+001836 ClG 23 41 06.3 +00 18 53           ~ 16 1

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2022.09.26-07:59:11

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