Colloquia

Suppressed Superwinds: A New Paradigm for Extreme Massive-Star Feedback

Wed 9 Dec 2020
Location:

This colloquium is hosted by STScI and will be held as a fully virtual event.

Time:

3:00 PM - 4:00 PM

Contact Information:

Have questions? Please contact STScI.

Description:

Feedback from young, super star clusters (SSCs) is a major driver for galaxy evolution at all cosmic epochs, but may be especially relevant for cosmic reionization.  The standard scenario for massive-star feedback has been that superwinds from SSCs clear pathways for Lyman continuum (LyC) and Ly-alpha radiation to escape from host galaxies.  However, theoretical predictions indicate that for the most massive and compact SSCs, superwinds are actually suppressed by catastrophic cooling and pressure confinement.  These extreme conditions are rare, but observational evidence from local starbursts increasingly supports this scenario.  I will present our work in establishing this new paradigm and its consequences for LyC and Ly-alpha escape.

Speaker:  Sally Oey (University of Michigan)

Notes:

All 2020 Fall Colloquium virtual talks are held on Wednesdays at 3:00 PM.

Please direct questions or comments to contact above.  The 2020-2021 committee members are: Karoline Gilbert (STScI co-chair), Ethan Vishniac (JHU co-chair), Graeme Addison (JHU), Martha Boyer (STScI), Joshua Peek (STScI), Kevin Schlaufman (JHU), and Raymond Simons (STScI).