Dr. Maohai Huang (NAOC, China) visit our group and give colloquium speech

Aug 30, 2011

“Dust component of the ISM: Numerical Modeling and Observation Results from Herschel”

After some introductory basics of interstellar dust I will discuss how the dust component of the interstellar media (ISM) is modeled with CLOUDY to produce observables in photodissociation regions (PDRs) and HII regions. Since its launch in May 2009 European Space Agency’s Herschel Infrared Space Observatory has observed Galactic and extragalactic dust with unprecedented sensitivity and efficiency. I will discuss some of the observational results.

Astronomers Capture Onset of Black Hole Devouring a Star

Aug 25, 2011

UNLV Astrophysicist Bing Zhang Part of International Team to Detail New Phenomenon In Aug. 25 Issue Of Nature


Three students in our group receive Astronomy Ph.Ds

May 20, 2011

Three of our astronomy students, Amanda Maxham, Francisco Virgili, Bin-bin Zhang have received astronomy Ph.D.s this year.  Congrats to all of them!  Bin-bin will go to Penn State Univ. as a postdoc, and Francisco Virgili will go to Astrophysics Research Institute in Liverpool John Moores University as a postdoc.

Dr. Weikang Zheng (Univ. of Michigan) visit our group and give colloquium speech

Mar 25, 2011

In the past decade, ROTSE responded and detected dozens of GRB optical counterparts including prompt (during gamma-ray burst emission) and afterglow emission (shortly following the initial burst). These data are important and valuable to study, verify and test different models of GRBs. In addition to the GRB follow-up observations, ROTSE also performs a supernova search program which has provided a number of discoveries of super-luminous events. I will also introduce other observations result from ROTSE including variable stars search program etc.

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Prof. Ren-Xin Xu (Peking Univ.) visit our group and give colloquium speech

Feb 4, 2011

“Pulsars and Quark Stars”

In this presentation, after a brief introduction on different manifestations of pulsar-like compact stars, the nature of pulsars and the state of realistic dense matter at supra-nuclear density are discussed.

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Prof. Guo-Jin Qiao (Peking Univ.) visit our group and give colloquium speech

Jan 28, 2011

enough to produce gamma-rays.

“The Annular Gap Model and Pulsar High Energy and Radio Emission”

An annular gap model of pulsars will be presented. In this model, the advantages of both the polar cap/slot gap model and outer gap model are retained. The annular gap region would play an important role for both young normal pulsars and millisecond pulsars, since the potential drops in the annular region can be high.

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Dr. Brian Morsony (Univ. of Winsconsin) visit our group and give colloquium speech

Jan 21, 2011

gamma-ray emission. 

“The Impact of Environment on GRB and AGN Jets”

I will present numerical simulations of jet propagation in the context of GRB jets from massive stars and AGN jets in galaxy clusters.  For GRBs, the stellar envelope collimates the jet, keeping the jet hotter than would be expected for a free expansion.  This allows about 30% of the jet energy to escape as photospheric.

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Science Magazine Ranks NASA Swift Satellite result in Top Ten Science breakthroughs of the year

Jan 14, 2006

UNLV Physics Professor BING ZHANG  is a member of the SWIFT science team that demonstrated that collisions between neutron stars appear to spark most short bursts of gamma rays.

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Prof. Shuang-Nan Zhang (Institute of High Energy Physics, Beijing, China) visit our group and give colloquium speech

Dec 10, 2010

“Two topics on accreting high energy phenomena”

(1) An essential element in the unification scheme of active galactic nuclei (AGNs) is the existence of dusty tori, which have been found in a substantial fraction of all AGNs. However the physical process for the formation of these dusty tori and their roles in the evolution of AGNs are still unclear. I will present a model of the formation and evolution of dusty tori in AGNs, involving the anisotropic radiation from their accretion disks.

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Dr. Judy Racusin (NASA/GSFC) visit our group and give colloquium speech

Oct 22, 2010

“Fermi-LAT Gamma-ray Bursts and Insight from Swift”

A new revolution in Gamma-ray Burst (GRB) observations and theory has begun over the last two years since the launch of the Fermi Gamma-ray Space Telescope.  The new window into high energy gamma-rays opened by the Fermi-Large Area Telescope (LAT) is providing insight into prompt emission mechanisms and possibly also afterglow physics.  

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