Computer Science – Sound
Scientific paper
Dec 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000aas...197.4206b&link_type=abstract
American Astronomical Society, 197th AAS Meeting, #42.06; Bulletin of the American Astronomical Society, Vol. 32, p.1466
Computer Science
Sound
Scientific paper
We present the preliminary results from a NASA/JHU sounding rocket mission (36.186 UG), launched on 11 February 2000 at 20:27 MST, to obtain a long slit (200\arcsec x 12\arcsec) spectrum of the bright reflection nebula NGC 2023 in the 900 -- 1400 Å wavelength region. Multiple pointings within the nebula were obtained, including a high quality (S/N ≈ 10) spectrum of the central star, HD 37903, which clearly shows absorption from molecular hydrogen (H2). These pointings provide for the determination of the far-UV radial dust scattering profile from 5'' to ~70'' and can be used to derive the wavelength-dependent dust scattering and absorption properties. In one pointing, an excess of flux above that expected from a radially symmetric scattering profile observed at the location of infrared H2 fluorescent emission suggests the detection of the associated far-UV fluorescence. These observations were supported by NASA grant NAG5-5122 to the Johns Hopkins University.
Burgh Eric B.
Feldman Paul D.
McCandliss Stephan R.
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