UNLV Astro Journal Club Schedule for Spring 2012

Tuesdays at 1:00pm in the Dept. Conference Room (217)
Date Speaker Journal/Talk Title
Weihua Lei
Bardeen-Petterson Effect in Sw J1644+57
01/24 Wei Deng
On the low energy photon spectral index of photosphere model of GRBs
01/31 Amanda Maxham Recent Exoplanet Discoveries
(The exoplanet catalog with free iphone/ipad app: http://exoplanet.hanno-rein.de/
Extrasolar Visions: http://www.extrasolar.net
Kepler announcement page with animations: http://www.nasa.gov/mission_pages/kepler/news/new-multi-systems.html)
(1pm in Room 249)
Ryuichi Kurosawa
Modeling Line Variability from Accreting Magnetosphere and Wind Signatures of Classical T Tauri Stars
02/14 Massimilano De Pasquale Dark Gamma-Ray Bursts: on the bright scene for 10 years
Abstract: "I'll review our past and present understanding of GRBs with dim or absent optical transients, including the recent developments made possible by deep IR observations."
Bo Zhang
Dark matter searches with astroparticle data
(Porter,T. A., Johnson, R. P. and Graham, P. W. 2011, ARA&A,49:155–94)
02/28 Houjun Lu
Physical Properties of Galaxies from z = 2–4
(Shapley, A. E. 2011, ARA&A,49:525–580)
03/06 Gabriel Gobeli
Laboratory Astrochemistry: Gas-Phase Processes
(Smith, I.W.M. 2011, ARA&A,49: 29-66)
Special Forum
Ben Shappee
(Ohio State University)
The Mass-Loss Induced Eccentric Kozai Mechanism
Abstract: Over 10% of stellar systems contain 3 or more stars; this large fraction naturally leads to the question of what happens to these systems as they evolve.  I'll review the well-known Kozai-Lidov mechanism and the recently discovered eccentric Kozai mechanism.  I will discuss their implication for planetary systems and close binary stellar systems.  Finally, I will present our novel mechanism which may affect a broad range of hierarchical triple star systems. These systems are essentially unaffected by the Kozai-Lidov mechanism until the primary in the central binary evolves off the main sequence and begins mass-loss.  Subsequently, the primary becomes a white dwarf and may then be much less massive than the other components in the ternary, enabling the eccentric Kozai mechanism.'. In this near-test-particle limit, the mutual inclination between the inner and outer binary can flip signs, driving the inner binary to very high eccentricity and tidal contact.  Even distant binaries, with initial semi-major axes larger then tens of AU, can be strongly affected. I will present an example of this ``Mass-loss Induced Eccentric Kozai'' (MIEK) mechanism and a first attempt to explore the MIEK mechanism's dependence on the initial eccentricities and inclination of the triple system.
03/20 Robert Thompson Molecular Clouds in Nearby Galaxies
(Fukui, Y., Kawamura, A. 2010, ARA&A,48: 547-580)
03/27 He Gao
The Astrophysics of Ultrahigh-Energy Cosmic Rays
(Kotera, K. & Olinto, A.V. 2011, ARA&A, 49: 119–153)

Spring Break week
John Boisvert Galaxy Disks
(van der Kruit, P.C. & Freeman, K.C. 2011, ARA&A, 49: 301-371)
04/17 Keita Todoroki Stellar Feedback in Galaxies and the Origin of Galaxy-scale Winds
(Hopkins, P.F., Quataert, E. & Murray, N. 2011, arXiv:1110.4638)

05/01 Amit Kashi A Cold Channel for Black Hole Accretion and Feedback in Cosmological Simulations
Semester Ends