Matches in DBpedia 2014 for { <http://dbpedia.org/resource/Brightest_cluster_galaxy> ?p ?o. }
Showing items 1 to 34 of
34
with 100 items per page.
- Brightest_cluster_galaxy abstract "A brightest cluster galaxy (BCG) is defined as the brightest galaxy in a cluster of galaxies. BCGs include the most massive galaxies in the universe. They are generally elliptical galaxies which lie close to the geometric and kinematical center of their host galaxy cluster, hence at the bottom of the cluster potential well. They are also generally coincident with the peak of the cluster X-ray emission.Formation scenarios for BCGs include:Cooling flow—Star formation from the central cooling flow in high density cooling centers of X-ray cluster halos.The study of accretion populations in BCGs has cast doubt over this theory and astronomers have seen no evidence of cooling flows in radiative cooling clusters. The two remaining theories exhibit healthier prospects.Galactic cannibalism—Galaxies sink to the center of the cluster due to dynamical friction and tidal stripping.Galactic merger—Rapid galactic mergers between several galaxies take place during cluster collapse.It is possible to differentiate the cannibalism model from the merging model by considering the formation period of the BCGs. In the cannibalism model, there are numerous small galaxies present in the evolved cluster, whereas in the merging model, a hierarchical cosmological model is expected due to the collapse of clusters. It has been shown that the orbit decay of cluster galaxies is not effective enough to account for the growth of BCGs. The merging model is now generally accepted as the most likely one, but recent observations are at odds with some of its predictions. For example, it has been found that the stellar mass of BCG's was assembled much earlier than the merging model predicts.BCGs are divided into various classes of galaxies: giant ellipticals (gE), D galaxies and cD galaxies. cD and D galaxies both exhibit an extended diffuse envelope surrounding an elliptical-like nucleus akin to regular elliptical galaxies. The light profiles of BCGs are often described by a Sersic surface brightness law, a double Sersic profile or a de Vaucouleurs law. The different parametrizations of the light profile of BCG's, as well as the faintness of the diffuse envelope lead to discrepancies in the reported values of the sizes of these objects.".
- Brightest_cluster_galaxy thumbnail Abell_S740.jpg?width=300.
- Brightest_cluster_galaxy wikiPageID "3817826".
- Brightest_cluster_galaxy wikiPageRevisionID "561983554".
- Brightest_cluster_galaxy hasPhotoCollection Brightest_cluster_galaxy.
- Brightest_cluster_galaxy subject Category:Black_holes.
- Brightest_cluster_galaxy subject Category:Extragalactic_astronomy.
- Brightest_cluster_galaxy subject Category:Galaxies.
- Brightest_cluster_galaxy subject Category:Supermassive_black_holes.
- Brightest_cluster_galaxy type BlackHole109223177.
- Brightest_cluster_galaxy type BlackHoles.
- Brightest_cluster_galaxy type Location100027167.
- Brightest_cluster_galaxy type Object100002684.
- Brightest_cluster_galaxy type PhysicalEntity100001930.
- Brightest_cluster_galaxy type Region108630039.
- Brightest_cluster_galaxy type SupermassiveBlackHoles.
- Brightest_cluster_galaxy type YagoGeoEntity.
- Brightest_cluster_galaxy type YagoLegalActorGeo.
- Brightest_cluster_galaxy type YagoPermanentlyLocatedEntity.
- Brightest_cluster_galaxy comment "A brightest cluster galaxy (BCG) is defined as the brightest galaxy in a cluster of galaxies. BCGs include the most massive galaxies in the universe. They are generally elliptical galaxies which lie close to the geometric and kinematical center of their host galaxy cluster, hence at the bottom of the cluster potential well.".
- Brightest_cluster_galaxy label "Brightest cluster galaxy".
- Brightest_cluster_galaxy label "Galassia di ammasso più luminosa".
- Brightest_cluster_galaxy label "Galaxia más brillante de cúmulo".
- Brightest_cluster_galaxy label "最亮團星系".
- Brightest_cluster_galaxy sameAs Galaxia_más_brillante_de_cúmulo.
- Brightest_cluster_galaxy sameAs Galassia_di_ammasso_più_luminosa.
- Brightest_cluster_galaxy sameAs BC_은하.
- Brightest_cluster_galaxy sameAs m.0b1j0d.
- Brightest_cluster_galaxy sameAs Q1151284.
- Brightest_cluster_galaxy sameAs Q1151284.
- Brightest_cluster_galaxy sameAs Brightest_cluster_galaxy.
- Brightest_cluster_galaxy wasDerivedFrom Brightest_cluster_galaxy?oldid=561983554.
- Brightest_cluster_galaxy depiction Abell_S740.jpg.
- Brightest_cluster_galaxy isPrimaryTopicOf Brightest_cluster_galaxy.