Preliminary results of ultraviolet interstellar extinction from TD1 satellite observations

Astronomy and Astrophysics – Astronomy

Scientific paper

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Interstellar Extinction, Spaceborne Astronomy, Stellar Radiation, Ultraviolet Absorption, Absorption Spectra, Far Ultraviolet Radiation, Satellite Observation, Star Distribution, Td-1 Satellite

Scientific paper

The interstellar extinction law in the far ultraviolet has been derived from observations of about 100 stars for three galactic regions in the direction of Cygnus, galactic centre and anticentre. For each region the weighted mean extinction curve has an accuracy of about 6 percent and shows no variation for the different directions. The profile of the broad extinction band centred near 2200 A is derived and shown to be symmetrical. It is concluded that the extinction characteristics will need more than one type of particle for their explanation.

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