Astronomy Department Journal Club

Spring 2007

Contact:  Geoff Bower

 

January

12

*Alexander Jonathan van der Horst (Amsterdam)*

Gamma-Ray Burst Afterglow Modeling and the Circumburst Medium

 

19

 Greg Howes

 Geoff Bower

 Protostellar Outflow-Driven Turbulence, Matzner 2007, astro-ph/0701022
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 Photon Orbital Angular Momentum in Astrophysics, Harwit, 2003, ApJ, 597, 1266

 

26

 Bryan Metzger

 "On the Mechanism of Gamma-Ray Burst Afterglows" by Lucas Uhm and Andrei Beloborodov.

February

  2

 Josh Goldston Peek

 Hyper velocity stars II: The bound population
Brown et al
astro-ph/0701600

 

  9

*Yosi Gelfand (CfA)*

 Bursts and Bubbles -- Energetic Outflows from Young Neutron Stars


Neutron stars offer a powerful probe into the explosion
mechanism behind core-collapse stars as well as the behavior of matter at
densities and in the presence of magnetic fields much higher than can be
achieved in the lab. Outflows from neutron stars offer a way of learning
about these processes, and in this talk I discuss what can be learned by
observing both the transient ouflows produced after magnetar giant flares
as well as the quiescent outflows from neutron stars.


 

16

 Eric Huff

 "How Tomographic Cosmic Shear Maps Lead to Constraints on Dark Energy Properties."
astro-ph/0611159

 

23

 Onsi Fakhouri

 

astro-ph/0702355
Title: How many supernovae are we missing at high redshift?
Authors: F. Mannucci, M. Della Valle, N. Panagia
Comments: 9 pages, MNRAS, in press

March

  2

 Nia Imara

 "Ultraviolet excited high-j molecular hydrogen in photodissociation regions,"
lee, pak, van dyke dixon, anddishoeck.
AJ, 655:940-945, 2007 February 1

 

  9

 Kristen Shapiro
 Jeff Silverman

 

"Thirsty Aliens: A lack of water and other
atmospheric spectral features of exoplanets."
IR spectra of hot jupiters: astro-ph/0702494 and 0702507
SEARCHING FOR PRIMORDIAL BLACK HOLE DARK MATTER WITH PULSAR TIMING ARRAYS,astro-ph/0702586

 

16

*Saskia Hekker (Leiden)*

 Radial velocity observations at Lick: Science at different time scales

In 1999 a radial velocity survey of 180 red giants started at Lick
observatory, using the Coude Auxiliary Telescope (CAT) in conjunction with
the Hamilton echelle spectrograph. The main goal at the time was to measure the intrinsic variability of these stars and identify reference stars
for the SIM space mission. The still ongoing survey reveals 'stable' stars
usefull as reference stars, but also stars with random and sinusoidal
variations. Results of this survey will be presented.

With observations obtained every month this survey is not sensitive to
solar-like oscillations. These are oscillations excited by turbulence
fluctuations in the outer atmosphere of a star and have periods of order
minutes in main sequence stars up to hours in giants. In January 2007
a world wide campaign to observe these oscillations in Procyon, a bright F5 subgiant, has been performed. We contributed with a forthnight of observations at Lick during which we solemnly observed this star. The science case and first results will be presented.

 

23

 Francisco Ramos Stierle

 Conor Laver

 "First brown dwarf with evidence for an AU-scale inner disk hole."
Muzerolle et al. 2006, The Astrophysical Journal, Volume 643, Issue  2, pp. 1003-1010
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"Looking deep for water: from Mars Missions to Devonshire Dowsers"

 

30

*Spring Break*

 

April

  6

 Dan Perley

 "Virgo Galaxies with Long One-Sided HI Tails"

 

13

 Michael Fitzgerald

 The photophoretic sweeping of dust in transient protoplanetary disks

http://www.edpsciences.org/10.1051/0004-6361:20066363

 

20

 Ruth Murray-Clay

 "The mass function of dense molecular cores and the origin of the  IMF" by Alves, J., Lombardi, M., & Lada, C. J. 2007, A&A, 462, L17
astro-ph/0612126

 

27

 Linda Strubbe
 Stella Offner

High-Resolution SMA Imaging of the LkHa 330 Transitional Disk
(Poster at From Stars to Planets conference, by Joanna Brown, Caltech)
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Giant collisions involving a young Jupiter
Anic, Alibert, & Benz, 2007A&A,466,717A

May

  4

 Holly Maness

 

"Magnetic Fields in the Formation of Sun-Like Stars"
Girart, Rao, & Marrone
published in Science a few months ago

 

11

 

 

 

18

 Jun Zhang

 

 

 

 

 


All meetings at 12:10 pm in 544 Campbell.

Fall 2006 Schedule