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Multi-wavelength study of the disk around the very low-mass star Par-Lup3-4
N. Huelamo, H. Bouy, C. Pinte +8
Par-Lup3-4 is a very low-mass star (spectral type M5) in the Lupus III star-forming region. The object is underluminous by ~4 mag when compared to objects of similar mass in the sa…
A Spitzer c2d Legacy Survey to Identify and Characterize Disks with Inner Dust Holes
Bruno Merín, Joanna M. Brown, Isa Oliveira +17
Understanding how disks dissipate is essential to studies of planet formation. However, identifying exactly how dust and gas dissipates is complicated due to difficulty in finding…
C2D Spitzer-IRS spectra of disks around T Tauri stars V. Spectral decomposition
J. Olofsson, J. -C. Augereau, E. F. van Dishoeck +5
(Abridged) Dust particles evolve in size and lattice structure in protoplanetary disks, due to coagulation, fragmentation and crystallization, and are radially and vertically mixed…
First results of the Herschel Key Program 'Dust, Ice and Gas in Time': Dust and Gas Spectroscopy of HD 100546
B. Sturm, J. Bouwman, Th. Henning +40
We present far-infrared spectroscopic observations, taken with the Photodetector Array Camera and Spectrometer (PACS) on the Herschel Space Observatory, of the protoplanetary disk…
Dust, Ice and Gas in Time (DIGIT) Herschel program first results: A full PACS-SED scan of the gas line emission in protostar DK Cha
T. A. van Kempen, J. D. Green, N. J. Evans +42
DK Cha is an intermediate-mass star in transition from an embedded configuration to a star plus disk stage. We aim to study the composition and energetics of the circumstellar mate…
Where is the warm H2 ? A search for H2 emission from disks around Herbig Ae/Be stars
C. Martin-Zaidi, J-. C. Augereau, F. Menard +4
Mid-IR emission lines of H2 are useful probes to determine the mass of warm gas present in the surface layers of disks. Numerous observations of Herbig Ae/Be stars (HAeBes) have be…
The solar type protostar IRAS16293-2422: new constraints on the physical structure
Nicolas Crimier, Cecilia Ceccarelli, Sebastien Maret +5
Context: The low mass protostar IRAS16293-2422 is a prototype Class 0 source with respect to the studies of the chemical structure during the initial phases of life of Solar type s…
A Spitzer Survey of Protoplanetary Disk Dust in the Young Serpens Cloud: How do Dust Characteristics Evolve with Time?
Isa Oliveira, Klaus M. Pontoppidan, Bruno Merin +7
We present Spitzer IRS mid-infrared (5-35 micron) spectra of a complete flux-limited sample (> 3 mJy at 8 micron) of young stellar object (YSO) candidates selected on the basis of…