we propose to use isocam and phot to measure the spectral energy distribution of dust emission in the direction of background stars for which the extinction curve of dust is known. the stars have been selected from a sample of stars located behind nearby molecular clouds (chamaeleon and taurus) and high latitude cirrus clouds. we have also included two stars in the outer edges of the smc. the stars have been choosen so that the the same dust is sampled in emission and absorption. the data will be used to correlate the emission and extinction properties of dust. we will look for the contribution of small particles to the uv extinction. this information will help to characterize the different components of interstellar dust and to understand their evolution in interstellar clouds. this is the follow-up of a work we started with the iras data. the iso observations will help us to get make the comparison with more specific signatures of interstellar grains such as the infared feature emission in the near-ir and the cold grains emission in the far-ir. the higher angular resolution provided by iso will also help in reducing the difference in agular resolution between the emission and extinction measurements.
Instrument
CAM01
Temporal Coverage
1996-04-13T05:03:09Z/1996-04-13T07:36:52Z
Version
1.0
Mission Description
The Infrared Space Observatory (ISO) was the worlds first true orbiting infrared observatory. Equipped with four highly-sophisticated and versatile scientific instruments, it was launched by Ariane in November 1995 and provided astronomers world-wide with a facility of unprecedented sensitivity and capabilities for a detailed exploration of the Universe at infrared wavelengths.
European Space Agency, BOULANGER et al., 1999, 'A COMPARISON OF EXTINCTION AND EMISSION PROPERTIES OF DUST', 1.0, European Space Agency, https://doi.org/10.5270/esa-yvam45a
