Calendar

Mar
29
Thu
Colloquium (Joint with Physics): Jim Fuller (Host: Ethan Dederick)
Mar 29 @ 4:00 pm – 5:00 pm
Colloquium (Joint with Physics): Jim Fuller (Host: Ethan Dederick) @ Gardiner Hall 230

Surprising Impacts of Gravity Waves

Jim Fuller, Caltech

Gravity waves are low frequency fluid oscillations restored by buoyancy forces in planetary and stellar interiors. Despite their ubiquity, the importance of gravity waves in evolutionary processes and asteroseismology has only recently been appreciated. For instance, Kepler asteroseismic data has revealed gravity modes in thousands of red giant stars, providing unprecedented measurements of core structure and rotation. I will show how gravity modes (or lack thereof) can also reveal strong magnetic fields in the cores of red giants, and I will demonstrate that strong fields appear to be common within “retired” A stars but are absent in their lower-mass counterparts. In the late phase evolution of massive stars approaching core-collapse, vigorous convection excites gravity waves that can redistribute huge amounts of energy within the star. I will present preliminary models of this process, showing how wave energy redistribution can drive outbursts and enhanced mass loss in the final years of massive star evolution, with important consequences for the appearance of subsequent supernovae.
Aug
23
Fri
Colloquium: Safe Zone Training (Host: Inclusive Astronomy Group)
Aug 23 @ 3:15 pm – 4:15 pm
Colloquium: Safe Zone Training (Host: Inclusive Astronomy Group) @ BX102

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Aug
30
Fri
Colloquium: Lisa Young (Host: TBD)
Aug 30 @ 3:15 pm – 4:15 pm
Colloquium: Lisa Young (Host: TBD) @ BX102

Colloquium Title

Lisa Young, New Mexico Tech

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Sep
6
Fri
Colloquium: Brian Svoboda (Host: TBD)
Sep 6 @ 3:15 pm – 4:15 pm
Colloquium: Brian Svoboda (Host: TBD) @ BX102

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Sep
13
Fri
Colloquium: Eric Nielsen (Host: Moire Prescott)
Sep 13 @ 3:15 pm – 4:15 pm
Colloquium: Eric Nielsen (Host: Moire Prescott) @ BX102

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Sep
20
Fri
Colloquium: OPEN (Host: TBD)
Sep 20 @ 3:15 pm – 4:15 pm
Colloquium: OPEN (Host: TBD) @ BX102

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Sep
27
Fri
Colloquium: OPEN (Host: TBD)
Sep 27 @ 3:15 pm – 4:15 pm
Colloquium: OPEN (Host: TBD) @ BX102

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Oct
4
Fri
Colloquium: Raja GuhaThakurta (Host: Rene Walterbos)
Oct 4 @ 3:15 pm – 4:15 pm
Colloquium: Raja GuhaThakurta (Host: Rene Walterbos) @ BX102

Colloquium Title

Raja Guhathurkurta, University of California, Santa Cruz

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Oct
11
Fri
Colloquium: OPEN (Host: TBD)
Oct 11 @ 3:15 pm – 4:15 pm
Colloquium: OPEN (Host: TBD) @ BX102

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Oct
18
Fri
Colloquium: OPEN (Host: TBD)
Oct 18 @ 3:15 pm – 4:15 pm
Colloquium: OPEN (Host: TBD) @ BX102

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