Title of article :
JD2 - Diffuse Light in Galaxy Clusters
Author/Authors :
Magda Arnaboldi، نويسنده , , Ortwin Gerhard، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2009
Pages :
14
From page :
97
To page :
110
Abstract :
Diffuse intracluster light (ICL) has now been observed in nearby and in intermediate redshift clusters. Individual intracluster stars have been detected in the Virgo and Coma clusters and the first color-magnitude diagram and velocity measurements have been obtained. Recent studies show that the ICL contains of the order of 10% and perhaps up to 30% of the stellar mass in the cluster, but in the cores of some dense and rich clusters like Coma, the local ICL fraction can be high as 40%-50%. What can we learn from the ICL about the formation of galaxy clusters and the evolution of cluster galaxies? How and when did the ICL form? What is the connection to the central brightest cluster galaxy? Cosmological N-body and hydrodynamical simulations are beginning to make predictions for the kinematics and origin of the ICL. The ICL traces the evolution of baryonic substructures in dense environments and can thus be used to constrain some aspects of cosmological simulations that are most uncertain, such as the modeling of star formation and the mass distribution of the baryonic component in galaxies.
Keywords :
galaxies: clusters: general , galaxies: evolution , galaxies: interactions , galaxies: structure , galaxies: star clusters , (ISM:) planetary nebulae: general , (cosmology:) large-scale structure of universe , galaxies: kinematics and dynamics
Journal title :
Proceedings of the International Astronomical Union
Serial Year :
2009
Journal title :
Proceedings of the International Astronomical Union
Record number :
674599
Link To Document :
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