Events Archive

The Hidden Monsters: Obscured AGN in the era of NuSTAR and WISE

Tue, Mar 8, 2016 at 1:00 pm

131 Campbell Hall

Ryan Hickox (Dartmouth)

The study of powerful, highly obscured accreting black holes has recently seen dramatic advances with hard X-ray observations from NuSTAR and mid-infrared data from WISE. These "hidden" obscured quasars were for a long time elusive, but we can now identify millions of these objects across most the sky, and characterize the nature of their obscuration and their role in the formation …

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The Journey of High-Energy Photons in Blazar Jets

Mon, Mar 7, 2016 at 12:00 pm

131 Campbell Hall

Lorenzo Sironi (Harvard)

We investigate the origin and the fate of high-energy photons in blazar jets, by means of first-principles particle-in-cell (PIC) kinetic simulations. In magnetically-dominated jets, magnetic reconnection is often invoked as a mechanism to transfer the jet magnetic energy to the emitting particles, thus powering the observed non-thermal emission. With 2D and 3D PIC simulations, we show that …

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Exoplanets in the SHREK Era

Thu, Mar 3, 2016 at 4:00 pm

1 LeConte Hall

Andrew Howard (Hawaii)

Earth-size exoplanets and their slightly larger ‘super-Earth’ cousins are the most abundant planets orbiting close to Sun-like stars.  These planets have diverse physical compositions, unusual atmospheres, and poorly understood origins.  My talk will start by tracing the discovery and early characterization of these small worlds.  I will then focus on SHREK, a …

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CIPS Seminar: Enceladus Series 3-2

Wed, Mar 2, 2016 at 3:00 pm

131 Campbell Hall

Miki Nakajima (Caltech)
Michael Manga (Berkeley)

This weeks CIPS Seminar will feature two speakers (please continuing reading for complete abstracts and titles).

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Mapping missing matter with the South Pole Telescope and other mm/submm-wave telescopes

Tue, Mar 1, 2016 at 1:00 pm

131 Campbell Hall

Gil Holder (McGill)

There are issues of dark or missing matter on scales ranging over 12 orders of magnitude that can be addressed with CMB experiments.  On cosmological scales, we can make mass maps using lensing of the CMB. I'll show recent results from the South Pole Telescope using these mass maps to investigate the connection between dark matter and galaxies in the Dark Energy Survey.  On …

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Stars In Motion: Impact in Star Formation, Compact Objects, and Galactic Centers

Mon, Feb 29, 2016 at 12:00 pm

131 Campbell Hall

Jessica Lu (Hawaii)

High-precision infrared astrometry has enabled unique experiments in many fields of astronomy, especially the study of the disk and center of our Galaxy. I will present results from our astrometric experiments to (1) test theories of star formation and the universality of the initial mass function, (2) search for free-floating stellar mass black holes using astrometric microlensing, …

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Exoplanets in HD

Thu, Feb 25, 2016 at 4:00 pm

1 LeConte Hall

Jacob Bean (Chicago)

Exoplanet surveys have revealed an amazing diversity of planets orbiting other stars in the last two decades. Studying the atmospheres of representative objects is the key next step in leveraging these detections to further transform our understanding of planet formation and planetary physics. Additionally, atmospheric studies are critical for determining if any of the …

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Department Lunch Talk 2/25 - LIGO Results

Thu, Feb 25, 2016 at 12:30 pm

131 Campbell Hall

Francois Foucart (UC Berkeley)
Philipp Moesta (UC Berkeley)
Jenni Barnes (UC Berkeley)

Francois Foucart (UC Berkeley) - "The Recent LIGO Results: Discussion" Philipp Moesta (UC Berkeley) - "The Future of LIGO: Improvements and Science" Jenni Barnes (UC Berkeley) - "LIGO Followup with Other Observing Techniques"

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CIPS Seminar: Enceladus Series 2-24

Wed, Feb 24, 2016 at 3:00 pm

131 Campbell Hall

Rob De Rosa (UC Berkeley)
François Soubiran (UC Berkeley)

This weeks CIPS Seminar will feature two speakers (please continuing reading for complete abstracts and titles).

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Modeling Galaxies in the Era of Precision Cosmology: An open source approach with Halotools

Tue, Feb 23, 2016 at 1:00 pm

131 Campbell Hall

Andrew Hearin (Yale)

In this talk, I will review how models of the galaxy-halo connection can provide constraints on cosmology and insight into galaxy formation physics. Theoretical predictions in conventional formulations of these models are plagued by persistent systematic errors, for example due to uncertainty associated with "assembly bias". As galaxy surveys continue to provide ever more precise …

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Formation and Compositions of Planet Interiors and Atmospheres: Discoveries from Kepler, K2, and Beyond

Thu, Feb 18, 2016 at 4:00 pm

1 LeConte Hall

Erik Petigura (Caltech)

I will give an overview of the current state of exoplanet astronomy, highlighting some of the major achievements of the recently completed Kepler mission. Today, K2 is building upon that rich legacy by surveying 14x more sky than Kepler, casting a wide net for planets around nearby bright stars that are more amenable to precise characterization. I will present some of my group's latest K2 …

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Department Lunch Talk 2-18

Thu, Feb 18, 2016 at 12:30 pm

131 Campbell Hall

Carolyn Porco (CICLOPS)
Khee-Gan Lee (MPIA)
Jamie Lloyd (Cornell)

The Department Lunch Talk series is a weekly event that features three 20 minute talks presented mainly by local scientists of any level to present their work to a broad spectrum of the department and usually includes one short talk by the astronomy colloquium speaker of the day.  Subjects can include personal scientific research, reporting on other work appearing in journals, education and public outreach efforts, science policy, and professional development issues.

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CIPS Seminar 2/17

Wed, Feb 17, 2016 at 3:00 pm

131 Campbell Hall

Francis Nimmo (UCSC)
Matthew Tiscareno (Cornell)

This weeks CIPS Seminar will feature two speakers (please continuing reading for complete abstracts and titles).

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First Measurement of the Small Scale Structure of the Intergalactic Medium

Tue, Feb 16, 2016 at 1:00 pm

131 Campbell Hall

Joe Hennawi (MPIA)

There is no such thing as empty space. Indeed, the most barren regions of the universe are the vast expanses between the galaxies, known as the intergalactic medium (IGM). Averaging just one lonely atom per cubic meter, this primordial gas left over from the Big Bang encodes fundamental information about our universe's history. About half a million years after the Big Bang, the plasma of …

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Department Lunch Talk 2-11

Thu, Feb 11, 2016 at 12:30 pm

131 Campbell Hall

Francois Foucart (UC Berkeley)
Hiroki Nagakura (Yukawa Institute of Theoretical Physics)
Dovi Poznanski (Tel Aviv University)

The Department Lunch Talk series is a weekly event that features three 20 minute talks presented mainly by local scientists of any level to present their work to a broad spectrum of the department and usually includes one short talk by the astronomy colloquium speaker of the day.  Subjects can include personal scientific research, reporting on other work appearing in journals, education and public outreach efforts, science policy, and professional development issues.

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