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Azimuthal Patterns in Planetesimal Circumstellar Disks
AbstractWays of formation of azimuthal resonant patterns in circumstellar planetesimal disks with planets are considered. Our analytical estimates...
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The Evolution of Circumstellar Disks: Lessons from the VLT and ISO
There is strong evidence that the planets in the solar system evolved from a disk-shaped solar nebula...
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TIMMI2 and VLT-ISAAC Spectroscopy of Circumstellar Dust Disks – A Spatially Resolved 3.3 μm PAH Feature Around HD100546
We present preliminary results of spectroscopic data obtained with the La Silla 3.6m TIMMI2 and the VLT-ISAAC instruments. We have obtained 23 TIMMI2...
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Size Distribution of Disks in the Trapezium Cluster
In this paper we present preliminary results on the size distribution of proto-planetary (“proplyds”) disks in the Trapezium Cluster, as measured...
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Sub-Arcsecond Millimeter Imaging of Disks and Envelopes: Probing the Density Structure
Sub-arcsecond observations at millimeter wavelengths are providing spectacular images necessary to study directly the circumstellar disks and inner...
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Observations of planet forming disks in multiple stellar systems
The demographic of circumstellar disks, the birthplaces of planets, is diverse and rich in disks featuring rings, gaps, spirals, filaments, and arcs....
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Detecting Gaps in Protoplanetary Disks with MIDI at the VLTI
Numerical simulations show that a Jupiter mass planet is able to dig the gas material along its path. Resulting from this, a density gap is produced...
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From Protoplanetary to Debris Disks
We discuss the physical difference between protoplanetary and debris (Vega-like) disks and consider the course of evolution which leads from the...
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High-Resolution Infrared Spectroscopy of Protoplanetary Disks
High-resolution spectroscopy at near and mid-infrared wavelengths can provide important and unique information about protoplanetary disks around...
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Interaction of Accretion and Circumstellar Extinction as a Cause of Unusual Variability in the WTTS Star V715 Per
AbstractWe present new results of our photometric and spectroscopic monitoring of the WTTS star V715 Per that is located in the young cluster IC 348...
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Course 12: Evolution of YSO Disks
As stars and planets form from accretion processes in disks, it is important to understand these processes and their evolutionary implications. While...
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Dual Imaging Observations of Circumstellar Matter in TW Hydrae: The NACO View
We present VLT/NAOS-CONICA (NACO) dual imaging polarimetric observations of TW Hya, a Classical T Tauri star in the nearby (57 pc) TW Hydrae...
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VLA Studies of Disks Around T Tauri Stars
Much activity is devoted to characterizing the properties of disks around young stars to extract information on the physics of mass accretion and of...
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Near-Infrared AO Spectroscopy of Edge-On Protoplanetary Disks with Subaru IRCS
We carried out near infrared (1.4–4.2 μm) AO imaging and spectroscopy of two edge-on protoplanetary disks; HK TauB and HV TauC located in Taurus...
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The Impact of Black Radiation on the Jeans Gravitational Instability Criterion in a Circumstellar Plasma Disk in View of Nonisentropic Effects
AbstractWithin the problem of modeling the evolution of circumstellar gas-and-dust clouds, the impact is discussed of black radiation on the Jeans...
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Porous Dust Clusters in Protoplanetary Disks as Catalysts for Formation of Complex Preorganic Compounds
AbstractComputer modeling has shown that, during the collisional evolution of a solid-state component in gas–dust protoplanetary disks, porous dust...
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The Kuiper Belt As An Evolved Circumstellar Disk
In the past decade, more than 400 objects have been discovered in orbit about the sun beyond Neptune. They constitute a vast ring of bodies the...
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Imaging Exosolar Dust Disks
Replenished circumstellar dust disks have been resolved around seven main sequence stars at optical to submillimeter wavelengths. We review these...
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UV spectropolarimetry with Polstar: protoplanetary disks
Polstar is a proposed NASA MIDEX mission that carries a high resolution UV spectropolarimeter capable of measure all four Stokes parameters onboard a...
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Probing T Tauri Stars and their Circumstellar Environment at NIR High Spectral Resolution
High spectral resolution observations of young low mass stars at near infrared (NIR) wavelengths are crucial in order to probe deep into their...