THE SPITZER c2d LEGACY RESULTS: STAR-FORMATION RATES AND EFFICIENCIES; EVOLUTION AND LIFETIMES
- N. Evans, M. Dunham, A. Sargent
- Physics
- 6 November 2008
The c2d Spitzer Legacy project obtained images and photometry with both IRAC and MIPS instruments for five large, nearby molecular clouds. Three of the clouds were also mapped in dust continuum…
Molecular abundances in OMC-1 - the chemical composition of interstellar molecular clouds and the influence of massive star formation
- G. Blake, E. Sutton, C. Masson, T. Phillips
- Physics
- 1 April 1987
We present here an investigation of the chemical composition of the various regions in the core of the
Orion molecular cloud (OMC-1) based on results from the Caltech Owens Valley Radio Observatory…
Structure and Evolution of the Envelopes of Deeply Embedded Massive Young Stars
- F. van der Tak, E. V. van Dishoeck, N. Evans II, G. Blake
- Physics, Geology
- 31 January 2000
The physical structure of the envelopes around a sample of 14 massive young stars is investigated using maps and spectra in submillimeter continuum and lines of C17O, CS, C34S, and H2CO. Nine of the…
The Spitzer c2d Survey of Large, Nearby, Interstellar Clouds. III. Perseus Observed with IRAC
- J. Jørgensen, P. Harvey, K. Young
- Physics
- 21 March 2006
We present observations of 3.86 deg2 of the Perseus molecular cloud complex with the Spitzer Space Telescope Infrared Array Camera (IRAC). The maps show strong extended emission arising from shocked…
THE SPITZER ICE LEGACY: ICE EVOLUTION FROM CORES TO PROTOSTARS
- K. Öberg, A. Boogert, N. Evans
- Physics
- 28 July 2011
Ices regulate much of the chemistry during star formation and account for up to 80% of the available oxygen and carbon. In this paper, we use the Spitzer c2d Legacy ice survey, complimented with data…
An old disk still capable of forming a planetary system
- E. Bergin, L. Cleeves, E. Dishoeck
- Physics, GeologyNature
- 31 January 2013
The detection of hydrogen deuteride, combined with existing observations and detailed models, implies a disk mass of more than 0.05 solar masses, which is enough to form a planetary system like the authors' own.
H2 and CO Emission from Disks around T Tauri and Herbig Ae Pre-Main-Sequence Stars and from Debris Disks around Young Stars: Warm and Cold Circumstellar Gas
- W. Thi, E. V. van Dishoeck, J. Kessler
- Physics, Geology
- 30 June 2001
We present ISO Short-Wavelength Spectrometer observations of H2 pure-rotational line emission from the disks around low- and intermediate-mass pre-main-sequence stars as well as from young stars…
Ocean-like water in the Jupiter-family comet 103P/Hartley 2
- P. Hartogh, D. Lis, G. Blake
- Geology, PhysicsNature
- 13 October 2011
It is reported that the D/H ratio in the Jupiter-family comet 103P/Hartley 2, which originated in the Kuiper belt, is (1.61 ± 0.24) × 10−4, which substantially expands the reservoir of Earth ocean-like water to include some comets, and is consistent with the emerging picture of a complex dynamical evolution of the early Solar System.
Spectroastrometric Imaging of Molecular Gas within Protoplanetary Disk Gaps
- K. Pontoppidan, G. Blake, E. V. van Dishoeck, A. Smette, M. Ireland, Joanna M. Brown
- Physics, Geology
- 21 May 2008
We present velocity-resolved spectroastrometric imaging of the 4.7 μm rovibrational lines of CO gas in protoplanetary disks using the CRIRES high-resolution infrared spectrometer on the Very Large…
The Impact of the Massive Young Star GL 2591 on Its Circumstellar Material: Temperature, Density, and Velocity Structure
- F. van der Tak, E. V. van Dishoeck, N. Evans II, E. Bakker, G. Blake
- Physics
- 5 May 1999
The temperature, density, and kinematics of the gas and dust surrounding the luminous (2 × 104 L☉) young stellar object GL 2591 are investigated on scales as small as ~100 AU, probed by 4.7 μm…
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