SIMBAD references

2019ApJ...887...31A - Astrophys. J., 887, 31-31 (2019/December-2)

Chandra observations of the spectacular A3411-12 merger event.

ANDRADE-SANTOS F., VAN WEEREN R.J., DI GENNARO G., WITTMAN D., RYU D., LAL D.V., PLACCO V.M., FOGARTY K., JEE M.J., STROE A., SOBRAL D., FORMAN W.R., JONES C., KRAFT R.P., MURRAY S.S., BRUGGEN M., KANG H., SANTUCCI R., GOLOVICH N. and DAWSON W.

Abstract (from CDS):

We present deep Chandra observations of A3411-12, a remarkable merging cluster that hosts the most compelling evidence for electron reacceleration at cluster shocks to date. Using the YX–M scaling relation, we find r500 ∼ 1.3 Mpc, M500=(7.1±0.7)×1014 M, kT=6.5±0.1keV, and a gas mass of Mg,500=(9.7±0.1)×1013M. The gas mass fraction within r500 is fg=0.14±0.01. We compute the shock strength using density jumps to conclude that the Mach number of the merging subcluster is small (M≤ 1.15–0.09+0.14). We also present density, temperature, pseudo-pressure, and pseudo-entropy maps. Based on the pseudo-entropy map, we conclude that the cluster is undergoing a mild merger, consistent with the small Mach number. On the other hand, radio relics extend over Mpc scale in the A3411-12 system, which strongly suggests that a population of energetic electrons already existed over extended regions of the cluster.

Abstract Copyright: © 2019. The American Astronomical Society. All rights reserved.

Journal keyword(s): galaxies: clusters: general - galaxies: clusters: individual: A3411 - galaxies: clusters: intracluster medium

Simbad objects: 13

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2021.06.12-19:51:45

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