Multi-Wavelength Imaging of Young Stellar Object Disks: Toward an Understanding of Disk Structure and Dust Evolution

Details Multi-Wavelength Imaging of Young Stellar Object Disks: Toward an Understanding of Disk Structure and Dust Evolution Multi-Wavelength Imaging of Young Stellar Object Disks: Toward an Understanding of Disk Structure and Dust Evolution

2007-07-17

arxiv.org/abs/0707.2608v1

Astronomy and Astrophysics

Astrophysics

Invited review at the Protostars and Planets V conference

Scientific paper

We review recent progress in high-resolution imaging of scattered light from disks around young stellar objects. Many new disks have been discovered or imaged in scattered light, and improved instrumentation and observing techniques have led to better disk images at optical, near-infrared, and thermal-infrared wavelengths. Multi-wavelength datasets are particularly valuable, as dust particle properties have wavelength dependencies. Modeling the changes in scattered-light images with wavelength gives direct information on the dust properties. This has now been done for several different disks. The results indicate that modest grain growth has taken place in some of these systems. Scattered-light images also provide useful constraints on the disk structure, especially when combined with long-wavelength SEDs. There are tentative suggestions in some disks that the dust may have begun to settle. The next few years should see this work extended to many more disks; this will clarify our understanding of the evolution of protoplanetary dust and disks.

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