Search
Now showing items 21-30 of 66
Fragmentation And Evolution Of Molecular Clouds. II. The Effect Of Dust Heating
(2010-02)
We investigate the effect of heating by luminosity sources in a simulation of clustered star formation. Our heating method involves a simplified continuum radiative transfer method that calculates the dust temperature. The ...
Warm Gas Towards Young Stellar Objects In Corona Australis Herschel/PACS Observations From The Digit Key Programme
(2014-05)
Context. The effects of external irradiation on the chemistry and physics in the protostellar envelope around low-mass young stellar objects are poorly understood. The Corona Australis star-forming region contains the R ...
Low Abundance, Strong Features: Window-Dressing Crystalline Forsterite In The Disk Wall Of HD 100546
(2011-07)
Context. Forsterite is one of the crystalline dust species that is often observed in protoplanetary disks and solar system comets. Being absent in the interstellar medium, it must be produced during the disk lifetime. It ...
A Spitzer c2d Legacy Survey To Identify And Characterize Disks With Inner Dust Holes
(2010-08)
Understanding how disks dissipate is essential to studies of planet formation. However, identifying exactly how dust and gas dissipate is complicated due to the difficulty of finding objects that are clearly in the transition ...
A Parameter Study Of The Dust And Gas Temperature In A Field Of Young Stars
(2009-06)
We model the thermal effect of young stars on their surrounding environment in order to understand clustered star formation. We take radiative heating of dust, dust-gas collisional heating, cosmic-ray heating, and molecular ...
The Spitzer c2d Survey Of Large, Nearby, Interstellar Clouds. X. The Chamaeleon II Pre-Main-Sequence Population As Observed With IRAC And MIPS
(2008-03)
We discuss the results from the combined IRAC and MIPS c2d Spitzer Legacy survey observations and complementary optical and NIR data of the Chamaeleon II (Cha II) dark cloud. We perform a census of the young population in ...
Properties Of The Youngest Protostars In Perseus, Serpens, And Ophiuchus
(2009-02)
We present an unbiased census of deeply embedded protostars in Perseus, Serpens, and Ophiuchus, assembled by combining large-scale 1.1 mm Bolocam continuum and Spitzer Legacy surveys. We identify protostellar candidates ...
The VIRUS-P Exploration Of Nearby Galaxies (VENGA): Survey Design, Data Processing, And Spectral Analysis Methods
(2013-05)
We present the survey design, data reduction, and spectral fitting pipeline for the VIRUS-P Exploration of Nearby Galaxies (VENGA). VENGA is an integral field spectroscopic survey, which maps the disks of 30 nearby spiral ...
The Gould Belt "Misfits" Survey: The Real Solar Neighborhood Protostars
(2015-06)
We present an HCO+ J = 3. 2 survey of Class 0+I and Flat SED young stellar objects (YSOs) found in the Gould Belt clouds by surveys with Spitzer. Our goal is to provide a uniform Stage 0+I source indicator for these embedded ...
The Bolocam Galactic Plane Survey. VII. Characterizing The Properties Of Massive Star-Forming Regions
(2011-11)
We present the results of a Green Bank Telescope survey of NH(3)(1,1), (2,2), (3,3) lines toward 631 Bolocam Galactic Plane Survey (BGPS) sources at a range of Galactic longitudes in the inner Galaxy. We have detected the ...