XMM-Newton observations of NGC 3268 in the Antlia Galaxy Cluster: characterization of a hidden group of galaxies at z ~0.41
| Autor: | Ignacio D. Gargiulo, Lilia Patricia Bassino, Federico García, Juan Pablo Caso, Jorge Ariel Combi |
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| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Ciencias Físicas
Astrophysics::High Energy Astrophysical Phenomena Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics 01 natural sciences purl.org/becyt/ford/1 [https] GALAXIES: CLUSTERS [X-RAYS] Galaxy group 0103 physical sciences 010303 astronomy & astrophysics clusters: individual: (ACO S636) [Galaxies] Galaxy cluster Astrophysics::Galaxy Astrophysics Physics 010308 nuclear & particles physics Astrophysics::Instrumentation and Methods for Astrophysics Astronomy and Astrophysics purl.org/becyt/ford/1.3 [https] Characterization (materials science) Astronomía CLUSTERS: INDIVIDUAL: (ACO S636)8 [GALAXIES] Space and Planetary Science CLUSTERS: INTRACLUSTER MEDIUM [GALAXIES] X-rays: galaxies: clusters Galaxies: clusters: individual: (ACO S636) Galaxies: clusters: intracluster medium CIENCIAS NATURALES Y EXACTAS |
| Zdroj: | SEDICI (UNLP) Universidad Nacional de La Plata instacron:UNLP CONICET Digital (CONICET) Consejo Nacional de Investigaciones Científicas y Técnicas instacron:CONICET |
| Popis: | We report on a detailed X-ray study of the extended emission of the intracluster medium (ICM) around NGC3268 in the Antlia Cluster of galaxies, together with a characterization of an extended source in the field, namely a background cluster of galaxies at z ~ 0.41, which was previously accounted as an X-ray point source. The spectral properties of the extended emission of the gas present in Antlia were studied using data from the XMM-Newton satellite, complemented with optical images of Cerro Tololo Inter-American Observatory (CTIO) Blanco telescope, to attain for associations of the optical sources with the X-ray emission. The XMM-Newton observations show that the intracluster gas is concentrated in a region centred in one of the main galaxies of the cluster, NGC3268. By means of a spatially resolved spectral analysis, we derived abundances of the ICM plasma. We found a wall-like feature in the north-east direction, where the gas is characterized by a lower temperature with respect to the rest of the ICM. Furthermore, using combined optical observations, we inferred the presence of an elliptical galaxy in the centre of the extended X-ray source considered as a background cluster, which favours this interpretation. Instituto de Astrofísica de La Plata Instituto Argentino de Radioastronomía |
| Databáze: | OpenAIRE |
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