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<< April 2014 >>

Thursday, April 3, 2014

Observations of Star Forming Galaxies in the Heart of the Reionization Era

Colloquium: Astronomy Colloquia | April 3 | 4:10 p.m. | 1 LeConte Hall


Richard Ellis, Caltech

Department of Astronomy


Deep exposures with the Hubble Space Telescope (HST) have provided the primary evidence that star-forming galaxies were present in the first billion years of cosmic history. Sometime during this early period the intergalactic medium transitioned from a neutral gas to one that is fully ionized. How did this `cosmic reionization' occur and were star-forming galaxies responsible? The electron...   More >



Observations of Star Forming Galaxies in the Heart of the Reionization Era

Colloquium: Astronomy Colloquia | April 3 | 4:10 p.m. | 1 LeConte Hall


Richard Ellis, Caltech

Department of Astronomy


Deep exposures with the Hubble Space Telescope (HST) have provided the primary evidence that star-forming galaxies were present in the first billion years of cosmic history. Sometime during this early period the intergalactic medium transitioned from a neutral gas to one that is fully ionized. How did this 'cosmic reionization' occur and were star-forming galaxies the primary agents? The electron...   More >

Thursday, April 10, 2014

The Outer Architecture of Planetary Systems

Colloquium: Astronomy Colloquia | April 10 | 4:10 p.m. | 1 LeConte Hall


Brendan Bowler, Caltech

Department of Astronomy


High-contrast imaging is a powerful tool to probe the outer architecture of planetary systems and directly study the atmospheres of extrasolar planets. Adaptive optics imaging surveys have so far primarily focused on intermediate- and high-mass stars, revealing a handful of self-luminous planets. Yet M dwarfs have largely been neglected, despite having more favorable planet-star contrasts and...   More >

Thursday, April 17, 2014

Live Fast Die Young: The Evolution of Massive Stars towards their Death

Colloquium: Astronomy Colloquia | April 17 | 4:10 p.m. | 1 LeConte Hall


Selma de Mink, Carnegie Observatories

Department of Astronomy


Massive stars are rare and short-lived. Nevertheless, through their extreme brightness, strong outflows and powerful explosions, they heat and stir their surroundings, drive outflows on galactic scales, and are responsible for the main production heavy elements in the Universe. For this reason, stellar models of massive stars are an essential ingredient for a wide variety of astrophysical...   More >

Thursday, April 24, 2014

Astronomy Colloquium

Colloquium: Astronomy Colloquia | April 24 | 4:10 p.m. | 1 LeConte Hall


Risa Wechsler, Stanford

Department of Astronomy