Observation Of Cosmic Far-ultraviolet Background Radiation With Spear

Details Observation Of Cosmic Far-ultraviolet Background Radiation With Spear Observation Of Cosmic Far-ultraviolet Background Radiation With Spear

Jul 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...21012118s&link_type=abstract

American Astronomical Society Meeting 210, #121.18; Bulletin of the American Astronomical Society, Vol. 39, p.331

Astronomy and Astrophysics

Astrophysics

Scientific paper

We present a map of the cosmic far-ultraviolet (FUV; 1360-1710A) continuum background over the most of the sky. The map was obtained with the "Spectroscopy of Plasma Evolution from Astrophysical Radiation” instrument (SPEAR/FIMS), flown aboard the STSAT-1 satellite mission. The cosmic FUV flux distribution is consistent with what is generally believed to be its dominant component, light from early-type stars scattered by interstellar dust. We investigate the total FUV interstellar radiation field and comparisons of the diffuse FUV continuum map with maps of N(HI), Hα, 100 μm, and soft X-ray. We found the continuum intensity to be well correlated with the maps of N(HI), Hα and 100 μm, but anti-correlated with soft X-ray map. It is also found that the correlation between FUV continuum background with TD1 stellar flux is rather weaker than with the maps of N(HI), Hα and 100 μm. We are developing a dust-scattering radiative transfer model to fit the FUV continuum data.
The SPEAR (FIMS) is supported by NASA grant NAG5-5355 and flies on the STSAT-1 Mission, supported of the Korea Ministry of Science and Technology.

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