Discovery and imaging of a Galactic cirrus cloud with the far ultraviolet space telescope

Details Discovery and imaging of a Galactic cirrus cloud with the far ultraviolet space telescope Discovery and imaging of a Galactic cirrus cloud with the far ultraviolet space telescope

Apr 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995apj...443l..33h&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 443, no. 1, p. L33-L36

Astronomy and Astrophysics

Astrophysics

34

Extinction, Far Ultraviolet Radiation, H Beta Line, Hydrogen Clouds, Milky Way Galaxy, Northern Hemisphere, Ultraviolet Photometry, Brightness Distribution, Data Correlation, Gas Dynamics, Image Analysis, Light Scattering, Monte Carlo Method

Scientific paper

We present new far-ultraviolet (1400-1800 A) data concerning a Galactic cirrus cloud G251.2+73.3 near the north Galactic pole obtained with the space-borne imaging telescope FAUST (Far Ultraviolet Space Telescope). We obtain a good correlation between the far-ultraviolet (FUV) and IRAS 100 micrometers surface brightnesses, their relation being IFUV = (128 +/- 3) I100 micrometers - (264 +/- 9), where the IFUV flux is given in units of photon/s/sq cm/A/sr and I100 micrometers in MJy/sr. Using uvbyH-beta photometry, we get a distance of 120 pc and a visual extinction in the center of the cloud of 0.39 mag corresponding to an extinction of 1.0 mag at 1565 A. We have performed a multiple scattering calculation for the scattered light using the Monte Carlo method. These calculations provide restrictions on the FUV scattering properties of the interstellar dust.

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