info:eu-repo/semantics/article
The Abell 85 BCG: A Nucleated, Coreless Galaxy
Registro en:
Madrid, Juan P.; Donzelli, Carlos Jose; The Abell 85 BCG: A Nucleated, Coreless Galaxy; IOP Publishing; Astrophysical Journal; 819; 1; 26-2-2016; 50-57
0004-637X
1538-4357
CONICET Digital
CONICET
Autor
Madrid, Juan P.
Donzelli, Carlos Jose
Resumen
New high-resolution r-band imaging of the brightest cluster galaxy (BCG) in Abell 85 (Holm 15A) was obtained using the Gemini Multi Object Spectrograph. These data were taken with the aim of deriving an accurate surface brightness profile of the BCG of Abell 85, in particular, its central region. The new Gemini data show clear evidence of a previously unreported nuclear emission that is evident as a distinct light excess in the central kiloparsec of the surface brightness profile. We find that the light profile is never flat nor does it present a downward trend toward the center of the galaxy. That is, the new Gemini data show a different physical reality from the featureless, "evacuated core" recently claimed for the Abell 85 BCG. After trying different models, we find that the surface brightness profile of the BCG of Abell 85 is best fit by a double Sérsic model. Fil: Madrid, Juan P.. Gemini Observatorysouthern Operations Center; Chile. Commonwealth Scientific And Industrial Research Organization; Australia Fil: Donzelli, Carlos Jose. Observatorio Astronomico de la Universidad Nacional de Cordoba; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Astronomía Teórica y Experimental. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba. Instituto de Astronomía Teórica y Experimental; Argentina
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