MIT Astrophysics Colloquium 4/27/2021 (note Time: 10:00am ET) — Shock Physics In The Merging Galaxy Cluster A2146 (speaker: Helen Russell, University Of Nottingham)

Tuesday April 27, 2021 10:00 am
via Zoom

NOTE: This talk will begin at 10:00am ET

The galaxy cluster A2146 is undergoing a major merger and hosts two huge, bright Mach 2 shock fronts, which provide a unique opportunity to measure the electron-ion equilibration timescale along with other key transport phenomena.  Collisionless shocks occur over a wide range of scales from accretion shocks to supernova remnants and heliospheric shocks.  However, only clusters, particularly A2146, allow us to map the large-scale equilibration with a single observation, which is unaffected by cross-calibration uncertainties.  I will present preliminary results from a new 2.4Ms Chandra observation that provides a measure of this timescale, reveals detailed shock structure and traces the disruption of both cool cores, including heating and mixing of metal-rich, cool gas blobs in ram pressure stripped tails.

Host: Michael McDonald


Event Contact

Debbie Meinbresse