Abstract
We present K-band (22 GHz) properties of 10 central AGNs in galaxy clusters of various dynamic states. The data were obtained using the Korean VLBI Network (KVN) with a goal to study how the AGN hosted by the central cluster galaxy interacts with the cluster core while undergoing feedback. In KVN single-dish observations, 9 out of 10 targets are detected. Using our K-band flux and archival low-frequency radio data, we evaluate spectral indices of the sample. We find a rough trend that central AGNs in the cluster with shorter cooling timescale show a more flat radio spectrum. This result is suggestive of young synchrotron age of the AGNs located in the cluster with a cool core. High resolution KVN VLBI follow up observations indicate some hints of the presence of parsec-scale jets only in the cool core cluster AGNs. To-gether with our finding from KVN single-dish observations, the parsec-scale jet morphology of the sample suggests that the AGNs in cool-core clusters are more recently (re)activated compared to their counterparts in non cool-core clusters.
| Original language | English |
|---|---|
| Pages (from-to) | 82-86 |
| Number of pages | 5 |
| Journal | Astronomische Nachrichten |
| Volume | 337 |
| Issue number | 1-2 |
| DOIs | |
| Publication status | Published - 2016 Feb 1 |
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All Science Journal Classification (ASJC) codes
- Astronomy and Astrophysics
- Space and Planetary Science
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High-frequency radio properties of central AGNs in cluster environments. / Baek, J.; Chung, A.; Tremou, E.; Sohn, B. W.; Jung, T.; Ro, H.
In: Astronomische Nachrichten, Vol. 337, No. 1-2, 01.02.2016, p. 82-86.Research output: Contribution to journal › Article
TY - JOUR
T1 - High-frequency radio properties of central AGNs in cluster environments
AU - Baek, J.
AU - Chung, A.
AU - Tremou, E.
AU - Sohn, B. W.
AU - Jung, T.
AU - Ro, H.
PY - 2016/2/1
Y1 - 2016/2/1
N2 - We present K-band (22 GHz) properties of 10 central AGNs in galaxy clusters of various dynamic states. The data were obtained using the Korean VLBI Network (KVN) with a goal to study how the AGN hosted by the central cluster galaxy interacts with the cluster core while undergoing feedback. In KVN single-dish observations, 9 out of 10 targets are detected. Using our K-band flux and archival low-frequency radio data, we evaluate spectral indices of the sample. We find a rough trend that central AGNs in the cluster with shorter cooling timescale show a more flat radio spectrum. This result is suggestive of young synchrotron age of the AGNs located in the cluster with a cool core. High resolution KVN VLBI follow up observations indicate some hints of the presence of parsec-scale jets only in the cool core cluster AGNs. To-gether with our finding from KVN single-dish observations, the parsec-scale jet morphology of the sample suggests that the AGNs in cool-core clusters are more recently (re)activated compared to their counterparts in non cool-core clusters.
AB - We present K-band (22 GHz) properties of 10 central AGNs in galaxy clusters of various dynamic states. The data were obtained using the Korean VLBI Network (KVN) with a goal to study how the AGN hosted by the central cluster galaxy interacts with the cluster core while undergoing feedback. In KVN single-dish observations, 9 out of 10 targets are detected. Using our K-band flux and archival low-frequency radio data, we evaluate spectral indices of the sample. We find a rough trend that central AGNs in the cluster with shorter cooling timescale show a more flat radio spectrum. This result is suggestive of young synchrotron age of the AGNs located in the cluster with a cool core. High resolution KVN VLBI follow up observations indicate some hints of the presence of parsec-scale jets only in the cool core cluster AGNs. To-gether with our finding from KVN single-dish observations, the parsec-scale jet morphology of the sample suggests that the AGNs in cool-core clusters are more recently (re)activated compared to their counterparts in non cool-core clusters.
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U2 - 10.1002/asna.201512269
DO - 10.1002/asna.201512269
M3 - Article
AN - SCOPUS:84959018410
VL - 337
SP - 82
EP - 86
JO - Astronomische Nachrichten
JF - Astronomische Nachrichten
SN - 0004-6337
IS - 1-2
ER -