Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21743324e&link_type=abstract
American Astronomical Society, AAS Meeting #217, #433.24; Bulletin of the American Astronomical Society, Vol. 43, 2011
Astronomy and Astrophysics
Astronomy
Scientific paper
We measure the Stark dominated, hydrogen line broadening in macroscopic plasmas with temperatures and electron densities typical of white dwarf photospheres. Utilizing the large X-ray flux generated by the Z Pulsed Power Facility at Sandia National Laboratories, NM, we uniformly heat a 19 cm3 cell of hydrogen gas to the relevant conditions, taking time resolved measurements of the emission spectra. The experiment will cover a wide range of white dwarf photospheric plasma conditions and compositions, testing not only theoretical white dwarf atmosphere models, but also current line broadening theories, with empirical measurements in unexplored regimes.
Bailey James E.
Ellis Jennifer
Falcon Ross E.
Montgomery Michael H.
Rochau G. A.
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