Calendar

Apr
8
Mon
Planetary Group meeting
Apr 8 @ 3:30 pm – 4:30 pm
Apr
12
Fri
Observatory Open House
Apr 12 @ 9:00 pm – 10:00 pm
Observatory Open House

Host: Anatoly Klypin. Assisted by Jodie Berdis, Julie Imig, and Rogelio Ochoa.

Apr
17
Wed
Special Colloquium: Amanda Wilber (Host: Moire Prescott)
Apr 17 @ 3:15 pm – 4:15 pm
Special Colloquium: Amanda Wilber (Host: Moire Prescott) @ AY 119

Searching for diffuse radio emission in merging galaxy clusters with LOFAR

Amanda Wilber, Universität Hamburg

Galaxy cluster mergers are powerful drivers of turbulence and shocks, which can accelerate cosmic-ray electrons within the magnetic field of the intracluster medium (ICM) to generate Megaparsec-sized radio structures. Actively merging clusters are excellent astrophysical laboratories for studying the nature of magnetic fields and the physics of particle acceleration. Questions still remain in identifying the source of cosmic-ray electrons that appear to fill the ICM so uniformly, and in determining the origin and amplification mechanisms of cluster magnetic fields. With its high-resolution, extended coverage, and sensitivity to radio emission with low surface brightness, the LOw Frequency ARray (LOFAR) Two-metre Sky Survey (LoTSS) gives us an unparalleled opportunity to hunt for diffuse radio sources in distant galaxy clusters. In this talk I present the results of LoTSS observations which reveal never-before-seen diffuse radio emission in the merging galaxy clusters Abell 1132 and Abell 1314.

Apr
22
Mon
Pizza lunch: Sarah Kovac/David DeColibus
Apr 22 @ 12:30 pm – 1:30 pm
Pizza lunch: Sarah Kovac/David DeColibus @ AY 119

ASTR 598

Planetary Group meeting
Apr 22 @ 3:30 pm – 4:30 pm
Apr
26
Fri
Colloquium: Megan Reiter (Host: Kristian Finlator)
Apr 26 @ 3:15 pm – 4:15 pm
Colloquium: Megan Reiter (Host: Kristian Finlator) @ BX102

The Role of Ecology in Star and Planet Formation

Megan Reiter, Royal Observatory Edinburgh

Understanding how feedback regulates star and planet formation is one of the outstanding unsolved problems in astrophysics. Stellar feedback affects all astrophysical scales: it shapes the interstellar medium and mass function of galaxies, determines the fragmentation and star formation efficiency of molecular clouds, and plays a central role in the geochemical evolution of terrestrial planets. High-mass stars shape the local star-forming environment – the ecology – via radiation pressure, stellar winds, photoionization, and supernovae. Photoionization is the least explored of these; however, recent numerical work suggests that it dominates the destruction of molecular clouds and planet-forming disks around stars born in clusters. These predictions depend critically on the dynamics of newborn stars and feedback-altered gas, but these quantities are poorly unconstrained. I will talk about two on-going surveys using ALMA, MUE/VLT, and M2FS/Magellan to measure gas and stellar kinematics in order to test the role of environment in shaping the outcome of star and planet formation.

Apr
29
Mon
Pizza lunch: Kristen Luchsinger
Apr 29 @ 12:30 pm – 1:30 pm
Pizza lunch: Kristen Luchsinger @ AY 119

ASTR 598

May
3
Fri
No Colloquium
May 3 @ 3:15 pm – 4:15 pm
No Colloquium @ BX102

Colloquium Title

Colloquium Speaker Name, Affiliation

Abstract text

May
10
Fri
No Colloquium (Final Exam Week)
May 10 @ 3:15 pm – 4:15 pm
No Colloquium (Final Exam Week) @ BX102

Colloquium Title

Speaker, Affiliation

Abstract text

Observatory Open House
May 10 @ 8:30 pm – 10:00 pm
Observatory Open House @ BX102, Tombaugh Observatory

Host: Kristian Finlator. Assisted by Jodi Berdis, David Decolibus, and Caitlin Doughty.

Public talk at 8:30pm in Biology Annex 102 (NW corner of Williams and Stewart), followed by observing at the Tombaugh Observatory.