observations of the spectral energy distributions (seds) and higher resolution spectra of circumstellar disks will be taken to investigate the physical properties of the disks. the principal goals of the proposal are: 1. to determine if current theories of disk structure and heating properly describe the spectral energy distributions between 5 and 200 microns. 2. to search for evolutionary changes in the disk properties brought about by the formation of planetary systems, for example, and the dissipation of the disks. 3. to resolve five outstanding questions about disk properties which can only be assessed through high resolution observations: a. how are the disks heated, b. are the vertical temperature gradients in the disks positive (heating from above) or negative (heating from within by accretion), c. what are the sizes of the disks, d. what are the far infrared optical depths of the disks, and e. are there gaps in the disk structure which can be identified through the seds?
Instrument
PHT03 , PHT22 , PHT32 , PHT40
Temporal Coverage
1996-04-30T23:37:00Z/1996-08-14T04:14:57Z
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, Beckwith et al., 1999, 'PHYSICAL PROPERTIES OF CIRCUMSTELLAR DISKS SPECTRAL ENERGY DISTRIBUTIONS OF YOUNG STELLAR OBJECTS', 1.0, European Space Agency, https://doi.org/10.5270/esa-7bl1vku
