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Full-Text Articles in Physical Sciences and Mathematics
The Brightest Cluster Galaxy In Abell 85: The Largest Core Known So Far, O. López-Cruz, C. Añorve, M. Birkinshaw, D. M. Worrall, H. J. Ibarra-Medel, Wayne A. Barkhouse, J. P. Torres-Papaqui, V. Motta
The Brightest Cluster Galaxy In Abell 85: The Largest Core Known So Far, O. López-Cruz, C. Añorve, M. Birkinshaw, D. M. Worrall, H. J. Ibarra-Medel, Wayne A. Barkhouse, J. P. Torres-Papaqui, V. Motta
Physics Faculty Publications
We have found that the brightest cluster galaxy (BCG) in A85, Holm 15A, displays the largest core known so far. Its cusp radius, r γ = 4.57 ± 0.06 kpc (426 ± 006), is more than 18 times larger than the mean for BCGs and 1 kpc larger than A2261-BCG, hitherto the largest-cored BCG. Holm 15A hosts the luminous amorphous radio source 0039-095B and has the optical signature of a LINER. Scaling laws indicate that this core could host a supermassive black hole (SMBH) of mass M • ~ (109-1011) M ☉. We suggest that cores this large represent a …