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On the merging cluster Abell 578 and its central radio galaxy 4C+67.13
galaxies: active
galaxies: clusters: individual (Abell 578)
galaxies: individual (4C+67.13)
galaxies: jets
intergalactic medium
X-rays: galaxies: clusters
Here we analyze radio, optical, and X-ray data for the peculiar cluster Abell 578. This cluster is not fully relaxed and consists of two merging sub-systems. The brightest cluster galaxy (BCG), CGPG 0719.8+6704, is a pair of interacting ellipticals with projected separation $\sim$10 kpc, the brighter of which hosts the radio source 4C+67.13. The Fanaroff–Riley type-II radio morphology of 4C+67.13 is unusual for central radio galaxies in local Abell clusters. Our new optical spectroscopy revealed that both nuclei of the CGPG 0719.8+6704 pair are active, albeit at low accretion rates corresponding to the Eddington ratio
cris.lastimport.wos | 2024-04-10T02:55:19Z | |
dc.abstract.en | Here we analyze radio, optical, and X-ray data for the peculiar cluster Abell 578. This cluster is not fully relaxed and consists of two merging sub-systems. The brightest cluster galaxy (BCG), CGPG 0719.8+6704, is a pair of interacting ellipticals with projected separation $\sim$10 kpc, the brighter of which hosts the radio source 4C+67.13. The Fanaroff–Riley type-II radio morphology of 4C+67.13 is unusual for central radio galaxies in local Abell clusters. Our new optical spectroscopy revealed that both nuclei of the CGPG 0719.8+6704 pair are active, albeit at low accretion rates corresponding to the Eddington ratio $\sim 10^{-4}$ (for the estimated black hole masses of $\sim 3 \times 10^{8} M_{\bigodot }$ and $\sim 10^{9} M_{\bigodot }$. The gathered X-ray (Chandra) data allowed us to confirm and to quantify robustly the previously noted elongation of the gaseous atmosphere in the dominant sub-cluster, as well as a large spatial offset ($\sim$ 60 kpc projected) between the position of the BCG and the cluster center inferred from the modeling of the X-ray surface brightness distribution. Detailed analysis of the brightness profiles and temperature revealed also that the cluster gas in the vicinity of 4C+67.13 is compressed (by a factor of about $\sim$ 1.4) and heated (from $\simeq$ 2.0 keV up to 2.7 keV), consistent with the presence of a weak shock (Mach number $\sim$ 1.3) driven by the expanding jet cocoon. This would then require the jet kinetic power of the order of $\sim 10 ^{45}erg s^{-1}$, implying either a very high efficiency of the jet production for the current accretion rate, or a highly modulated jet/accretion activity in the system. | pl |
dc.affiliation | Wydział Fizyki, Astronomii i Informatyki Stosowanej : Instytut – Obserwatorium Astronomiczne | pl |
dc.contributor.author | Hagino, K. | pl |
dc.contributor.author | Stawarz, Łukasz - 132081 | pl |
dc.contributor.author | Siemiginowska, A. | pl |
dc.contributor.author | Cheung, C. C. | pl |
dc.contributor.author | Kozieł-Wierzbowska, Dorota - 146955 | pl |
dc.contributor.author | Szostek, Anna - 160691 | pl |
dc.contributor.author | Madejski, G. | pl |
dc.contributor.author | Harris, D. E. | pl |
dc.contributor.author | Simionescu, A. | pl |
dc.contributor.author | Takahashi, T. | pl |
dc.date.accessioned | 2015-07-14T10:30:57Z | |
dc.date.available | 2015-07-14T10:30:57Z | |
dc.date.issued | 2015 | pl |
dc.date.openaccess | 12 | |
dc.description.accesstime | po opublikowaniu | |
dc.description.admin | [AB] Szostek, Anna [SAP11019463] 50000139 | |
dc.description.number | 2 | pl |
dc.description.version | ostateczna wersja wydawcy | |
dc.description.volume | 805 | pl |
dc.identifier.articleid | 101 | pl |
dc.identifier.articleid | 101 | pl |
dc.identifier.doi | 10.1088/0004-637X/805/2/101 | pl |
dc.identifier.eissn | 1538-4357 | pl |
dc.identifier.issn | 0004-637X | pl |
dc.identifier.uri | http://ruj.uj.edu.pl/xmlui/handle/item/12768 | |
dc.language | eng | pl |
dc.language.container | eng | pl |
dc.rights.licence | Inna otwarta licencja | |
dc.share.type | otwarte czasopismo | |
dc.subject.en | galaxies: active | pl |
dc.subject.en | galaxies: clusters: individual (Abell 578) | pl |
dc.subject.en | galaxies: individual (4C+67.13) | pl |
dc.subject.en | galaxies: jets | pl |
dc.subject.en | intergalactic medium | pl |
dc.subject.en | X-rays: galaxies: clusters | pl |
dc.subtype | Article | pl |
dc.title | On the merging cluster Abell 578 and its central radio galaxy 4C+67.13 | pl |
dc.title.journal | The Astrophysical Journal | pl |
dc.type | JournalArticle | pl |
dspace.entity.type | Publication |