Events Archive

CalDay 2015!

Apr 18, 10:00 amMar 24, 4:30 pm, 2015

Various Locations

CalDay 2015 is almost here! On April 18th the campus opens up to the public for hands-on activities, lectures, presentations, tours, food, and other opportunities to engage with the campus community. The Astronomy department is hosting a number of events; see below for a complete listing so you can plan out your day! *NEW EVENT ADDED* Radio Astronomy Lab / Search for Extraterrestrial …

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Star Formation and Molecular Gas in the First Three Billion Years

Thu, Apr 16, 2015 at 4:00 pm

1 LeConte Hall

Daniel Marrone (University of Arizona)

In the first few Gyr of cosmic history, the bulk of the stellar mass was assembled under conditions of higher density and lower metallicity than we observe locally. While the most advanced optical/IR facilities have provided very detailed studies of galaxies at z~2-5 and detections of rare galaxies at in the epoch of reionization, it continues to be extremely difficult to study the …

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Department Lunch 4/16

Thu, Apr 16, 2015 at 12:30 pm

131 Campbell Hall

Mate Adamkovics (UC Berkeley)
Rob De Rosa (UC Berkeley)
Daniel Marrone (U. Arizona; colloq. speaker)

Mate Adamkovics (UC Berkeley) TBD Rob De Rosa (UC Berkeley) TBD Daniel Marrone (U. Arizona; colloq. speaker) TBD

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Gravitational Lensing of the Cosmic Microwave Background: Flux Conservation and Growth of Inhomogeneities

Tue, Apr 14, 2015

131A Campbell Hall

John Peacock (ROE)

Gravitational lensing is a rich source of cosmological information: it probes both the amplitude and evolution of metric fluctuations, plus the distance-redshift relation via the geometry of the distortion of background images. But in 2014, Clarkson et al. suggested that lensing had an average non-Newtonian "back-reaction" effect, which altered the effective distance to the CMB …

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Binary Black Hole Accretion

Mon, Apr 13, 2015 at 12:00 pm

131A Campbell Hall

Andrew MacFadyen (NYU)

Binary black hole mergers in the presence of gaseous accretion flows are prime candidates for simultaneous observations of both gravitational waves and electromagnetic signals. I will present the results of 2D hydrodynamical simulations of circumbinary disk accretion using the moving-mesh code DISCO. These simulations demonstrate that gas accretion is not impeded by binarity. Gas is …

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Yuri's Night at the California Academy of Sciences

Photo by Robert Couse-Baker

Thu, Apr 9, 2015 at 6:00 pm

California Academy of Sciences in San Francisco, CA

Join the California Academy of Sciences as they celebrate Yuri's Night, in honor or Yuri Gagarin, the first human in space. This event includes music by Space Cowboys, limited-edition beer tastings, and telescope viewings and discussions lead by members of UC Berkeley Space Sciences Lab, NASA Kepler Mission, and the Academy's own Morrison Planetarium. 

Event and Ticket Information

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Pre-supernova Evolution and the Fates of Massive Stars

Thu, Apr 9, 2015 at 4:00 pm

1 LeConte Hall

Nathan Smith (University of Arizona)

A confluence of recent observations in the past decade have indicated that some basic assumptions that have guided our understanding of massive stars are not correct.  On the one hand, models for single massive star evolution seem to have overestimated the effects of mass loss through winds and the influence of rotation.  On the other hand, observations have shown that a large …

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Department Lunch 4/9

Thu, Apr 9, 2015 at 12:30 pm

131 Campbell Hall

Bekki Dawson (UC Berkeley)
Dave DeBoer (UC Berkeley)
Nathan Smith (U. Arizona, colloq speaker)

Bekki Dawson (UC Berkeley): "A recipe for rocky super-Earths" Dave DeBoer (UC Berkeley):  HERA Nathan Smith (U. Arizona, colloq speaker): "PTF11iqb: Bridging Type IIn with normal supernovae"

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Cosmology Seminar

Tue, Apr 7, 2015

131A Campbell Hall

Matt Becker (Stanford/SLAC)

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Cosmology Seminar

Mon, Apr 6, 2015 at 1:00 pm

131A Campbell Hall

Renyue Cen (Princeton)

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TAC Seminar

Mon, Apr 6, 2015 at 12:00 pm

131A Campbell Hall

Renyue Cen (Princeton)

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Total Lunar Eclipse - Saturday, April 4th

Sat, Apr 4, 2015, 3:15 am to 6:44 am

Space

From Alex Filippenko: There will be a lunar eclipse visible from much of North America before sunrise on the morning of Saturday, April 4 (this is, tonight -- Friday night). The Moon will start entering Earth's dark shadow ("umbra") at 3:15 am PDT and it will exit at 6:44 am PDT, just before sunrise (around 6:50 am PDT); totality will be at 4:48-5:03 am PDT, lasting only 5 …

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Testing General Relativity with the Event Horizon Telescope

Thu, Apr 2, 2015 at 4:00 pm

1 LeConte Hall

Dimitrios Psaltis (University of Arizona)

The Event Horizon Telescope will generate the first images of the shadows of the black holes in the Milky Way and in M87. The observed mm photons will have originated in two of the strongest gravitational fields found in the Universe, encoding during their travel to the Earth the properties of the black-hole spacetimes. In this talk, I will discuss the prospect of performing a new tests of …

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Department Lunch 4/2

Thu, Apr 2, 2015 at 12:30 pm

131 Campbell Hall

Kazumi Kashiyama (UC Berkeley)
Daniel Lecoanet (UC Berkeley)
Dimitrios Psaltis (University of Arizona)

Kazumi Kashiyama (UC Berkeley) "Supermassive star formation via high-velocity collisions of protogalaxies" Daniel Lecoanet (UC Berkeley) "Kelvin-Helmholtz Instability: A Code Comparison" Dimitrios Psaltis (University of Arizona) “Linking Tests of Gravity On All Scales: from the Strong-Field Regime to Cosmology”

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How the large-scale Lyman-alpha forest will tell us about the galaxy luminosity function

Tue, Mar 31, 2015 at 1:00 pm

131A Campbell Hall

Andrew Pontzen, UCL

I will introduce a surprising relationship between the Lyman-alpha forest large-scale power spectrum and the luminosity function of galaxies and quasars [arXiv 1402.0506]. The forest is generally assumed to be a tracer of total matter on large scales but I will show how the assumed link between the dark and observable universe is substantially modified by radiative transfer effects. Future …

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