Hidden Cooling Flows in Clusters of Galaxies II: A Wider Sample by A. C. Fabian et al. on Monday 28 November

We have recently uncovered Hidden Cooling Flows (HCFs) in the XMM RGS spectra

of 3 clusters of galaxies, Centaurus, Perseus and A1835. Here we search for

them in a wider sample of objects: the X-ray brightest group NGC5044; 4

moderate X-ray luminosity clusters Sersic 159, A262, A2052 and RXJ0821; and 3

high X-ray luminosity clusters RXJ1532, MACS 1931 and the Phoenix cluster.

Finally we examine two Virgo elliptical galaxies, M49 and M84. All

statistically allow the addition of an HCF. We find a significant detection of

an HCF in 6 clusters and 2 elliptical galaxies. The hidden mass cooling rates

are 5 to 40 Solar masses per year for the normal clusters, 1000 Solar masses

per year or more for the extreme clusters and 1 to 2 Solar masses per year for

the elliptical galaxies. We discuss the implications of the results for the

composition of the innermost parts of the massive host galaxies and look

forward to future observations.

arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2211.13971v1