Astrophysics Research Projects

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Presentation transcript:

Astrophysics Research Projects summer 2009 David Cohen See astro.swarthmore.edu/~cohen/students.html for more information.

Two projects 1. Analysis of unusually strong X-ray emission from a pair of young, very massive stars. 2. Modeling and analysis of high energy density plasma physics experiments that attempt to reproduce an X-ray nebula in the laboratory.

Unusually strong X-rays from Massive stars: Colliding winds or magnetically channeled winds?

M 17: The Omega Nebula

The Chandra X-ray Observatory (artist’s conception)

Simulated Chandra spectrum (above); Chandra imaging (left) shows that the star - Kleinmann’s Anonymous Star - is a binary system. See students page on my website for the observing proposal, which describes this project.

Colliding Wind X-ray Emission? artist’s conception numerical simulation (density plotted) 2 stars

Magnetically Channeled Wind Shocks?

The X-ray spectrum will tell us: Line ratios for location of the X-ray emitting plasma Line widths for the plasma kinematics

Laboratory Astrophysics: Photoionized plasma around black holes and neutron stars

Creating an X-ray photoionized nebula in the laboratory Binary systems with accreting compact objects are very strong X-ray sources

Imploding wire array at the Z-machine at Sandia Nat’l Lab is a powerful X-ray source

Building a model of the experiment (above) - calculating the intensity on the gas cell (left).

See the students page on my website for more details Model the spectrum of the neon in the gas cell to test predictions of the charge-state distribution See the students page on my website for more details