2019A&A...624A..91K


Query : 2019A&A...624A..91K

2019A&A...624A..91K - Astronomy and Astrophysics, volume 624A, 91-91 (2019/4-1)

Stellar populations in hosts of giant radio galaxies and their neighbouring galaxies.

KUZMICZ A., CZERNY B. and WILDY C.

Abstract (from CDS):


Context. Giant radio galaxies (with projected linear size of radio structure larger than 0.7Mpc) are very rare and unusual objects. Only ∼5% of extended radio sources reach such sizes. Understanding of the processes responsible for their large sizes is crucial to further our knowledge about the radio source's evolution.
Aims. We check the hypothesis that giants become extremely large due to the specific history of their host galaxy formation, as well as in the context of the cluster or group of galaxies where they evolve. Therefore we study the star formation histories in their host galaxies and in galaxies located in their neighbourhood.
Methods. We studied 41 giant-size radio galaxies as well as galaxies located within a radius of 5Mpc around giants to verify whether the external conditions of the intergalactic medium somehow influence the internal evolution of galaxies in the group/cluster. We compared the results with a control sample of smaller-sized Fanaroff-Riley type II radio galaxies and their neighbouring galaxies. We fit stellar continua in all galaxy spectra using the spectral synthesis code STARLIGHT and provide statistical analysis of the results.
Results. We find that hosts of giant radio galaxies have a larger amount of intermediate age stellar populations compared with smaller-sized FRII radio sources. The same result is also visible when we compare neighbouring galaxies located up to 1.5Mpc around giants and FRIIs. This may be evidence that star formation in groups with giants was triggered due to global processes occurring in the ambient intergalactic medium. These processes may also contribute to mechanisms responsible for the extremely large sizes of giants.

Abstract Copyright: © ESO 2019

Journal keyword(s): galaxies: active - galaxies: structure - galaxies: nuclei

Simbad objects: 44

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Number of rows : 44
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 LEDA 1259650 G 00 03 31.50864 +03 51 11.0196           ~ 3 0
2 NVSS J001049-110811 rG 00 10 49.695 -11 08 13.06   16.61   15.29   ~ 8 0
3 LEDA 1035284 G 00 42 46.85520 -06 13 52.9248           ~ 2 0
4 NGC 315 LIN 00 57 48.88335 +30 21 08.8122 12.80 12.20 11.16 11.26   ~ 724 2
5 LEDA 1726121 BiC 01 15 57.241 +25 07 20.31           ~ 3 0
6 FIRST J012012.5-003837 rG 01 20 12.51528 -00 38 37.5504           ~ 3 0
7 2MASX J01341281-0107298 BiC 01 34 12.786 -01 07 29.41   16.20   14.78   ~ 14 0
8 LEDA 1135743 rG 01 35 25.662 -00 44 47.35           ~ 5 0
9 FIRST J025942.8+001841 rG 02 59 42.8826662789 +00 18 40.864994796           ~ 5 0
10 4C 56.16 rG 07 49 48.1 +55 54 19           ~ 166 1
11 [SDR2001] B0747+426 BiC 07 51 08.7982896250 +42 31 24.191896711   20.38 19.33     ~ 7 0
12 SDSS J085701.76+013130.9 rG 08 57 01.76808 +01 31 30.9360           ~ 5 0
13 2MASS J08583278+5620143 G 08 58 32.78760 +56 20 14.3592           ~ 1 0
14 2MASX J09023843+1737515 BLL 09 02 38.4286588467 +17 37 51.531198616           ~ 9 0
15 87GB 091136.9+101859 BiC 09 14 19.5313830369 +10 06 40.580715790   21.0 19.9     ~ 9 1
16 FIRST J091859.3+315140 rG 09 18 59.40336 +31 51 40.6188           ~ 12 0
17 NVSS J092600+651922 rG 09 26 00.845 +65 19 22.85           ~ 6 0
18 LEDA 1503142 Sy2 09 32 38.30064 +16 11 57.2280   19.5 17.0     ~ 10 0
19 MCG+09-17-019 BiC 10 04 51.834 +54 34 04.29   15.4       ~ 27 1
20 3C 236.0 BLL 10 06 01.7502377 +34 54 10.401469   15.97       ~ 424 2
21 NVSS J102124+121702 rG 10 21 24.219 +12 17 05.45           ~ 8 0
22 NVSS J102131+051858 rG 10 21 31.4790958434 +05 19 00.911105715           ~ 5 0
23 7C 1029+2813 BLL 10 32 14.0189881480 +27 56 01.583229482     14.30     ~ 17 1
24 MCG+10-15-099 LIN 10 32 58.839 +56 44 53.81   15.1       ~ 27 0
25 MCG+05-27-014 LIN 11 11 25.213 +26 57 48.97           ~ 69 0
26 7C 1144+3517 BLL 11 47 22.13056 +35 01 07.5226   17.89 16.83 10.26   ~ 158 1
27 ICRF J124733.3+672316 QSO 12 47 33.3296299 +67 23 16.448950           ~ 77 1
28 DES J125312.28+404124.5 GiC 12 53 12.2843 +40 41 24.553           ~ 2 0
29 2MASX J13084472+6154157 rG 13 08 44.722 +61 54 15.77           ~ 5 0
30 2MASX J13114312+4058596 Sy2 13 11 43.125 +40 58 59.66     18.30     ~ 18 1
31 SDSS J132741.32+574943.4 rG 13 27 41.29368 +57 49 43.3632           ~ 5 0
32 2MASX J13283434-0307442 Sy2 13 28 34.3654996449 -03 07 44.756794986   17.76 17.14 16.817   ~ 19 0
33 2MASX J13455752+5403169 rG 13 45 57.553 +54 03 16.60           ~ 14 0
34 2MASS J14004343+3019185 BiC 14 00 43.436 +30 19 18.50           ~ 35 1
35 NAME Speca rG 14 09 48.827 -03 02 33.05   17.98   16.44   ~ 33 0
36 2MASX J14183761+3746243 Sy1 14 18 37.657 +37 46 24.53     14.50     ~ 15 1
37 NVSS J142819+291845 rG 14 28 19.200 +29 18 43.74           ~ 12 0
38 2MASX J14295539+0715129 LIN 14 29 55.375 +07 15 12.87   15.5       ~ 18 0
39 NVSS J150704+023407 rG 15 07 03.774 +02 34 07.24           ~ 5 0
40 2MASS J15405681-0127100 Sy2 15 40 56.815 -01 27 10.07           ~ 7 0
41 FIRST J155500.4+365337 G 15 55 00.41 +36 53 37.3           ~ 1 0
42 SDSS J161552.23+382631.9 Sy2 16 15 52.2408726092 +38 26 31.897265190           ~ 3 0
43 NGC 6251 Sy2 16 32 31.96990024 +82 32 16.3999540 15.24 14.66 12.89 7.62   ~ 685 0
44 FIRST J163522.6+360805 rG 16 35 22.573 +36 08 04.44           ~ 6 0

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2021.07.29-16:13:30

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