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SMA CO(J=6-5) and 435 micron interferometric imaging of the nuclear region of Arp 220
Satoki Matsushita, Daisuke Iono, Glen R. Petitpas +11
We have used the Submillimeter Array (SMA) to make the first interferometric observations (beam size ~1") of the 12CO J=6-5 line and 435 micron (690 GHz) continuum emission toward…
Luminous Infrared Galaxies with the Submillimeter Array: I. Survey Overview and the Central Gas to Dust Ratio
Christine D. Wilson, Glen R. Petitpas, Daisuke Iono +14
We present new data obtained with the Submillimeter Array for a sample of fourteen nearby luminous and ultraluminous infrared galaxies. The galaxies were selected to have luminosit…
On the Constancy of the Characteristic Mass of Young Stars
Bruce G. Elmegreen, Ralf S. Klessen, Christine D. Wilson
The characteristic mass M_c in the stellar initial mass function (IMF) is about constant for most star-forming regions. Numerical simulations consistently show a proportionality be…
The Detection of Molecular Gas in the Outskirts of NGC 6946
Jonathan Braine, Annette M. N. Ferguson, Frank Bertoldi +1
We present the results of a search for molecular gas emission via the CO line in the far outer disk of the nearby spiral, NGC 6946. The positions targeted were chosen to lie on or…
Molecular oxygen in the rho Ophiuchi cloud
B. Larsson, R. Liseau, L. Pagani +56
Molecular oxygen, O2 has been expected historically to be an abundant component of the chemical species in molecular clouds and, as such, an important coolant of the dense interste…
High Resolution Imaging of Warm and Dense Molecular Gas in the Nuclear Region of the Luminous Infrared Galaxy NGC6240
D. Iono, C. Wilson, S. Takakuwa +7
We present ~2'' resolution CO(3-2), HCO+(4-3) and 880micron continuum images of the luminous infrared galaxy NGC6240 obtained at the Submillimeter Array. We find that the spatially…
High Mass Star Formation. III. The Functional Form of the Submillimeter Clump Mass Function
Michael A. Reid, Christine D. Wilson
We investigate the mass function of cold, dusty clumps in 11 low- and high-mass star-forming regions. Using a homogeneous fitting technique, we analyze the shape of each region's c…
High Mass Star Formation I: The Mass Distribution of Submillimeter Clumps in NGC 7538
M. A. Reid, C. D. Wilson
We present submillimeter continuum maps at 450 and 850 microns of a 12 x 8 arcminute region of the NGC 7538 high-mass star-forming region, made using the Submillimeter Common-User…
Molecular Gas in Candidate Double Barred Galaxies III. A Lack of Molecular Gas?
Glen Petitpas, Christine Wilson
Most models of double-barred galaxies suggest that a molecular gas component is crucial for maintaining long-lived nuclear bars. We have undertaken a CO survey in an attempt to det…
The Mass Function of Super Giant Molecular Complexes and Implications for Forming Young Massive Star Clusters in the Antennae (NGC 4038/39)
C. D. Wilson, N. Z. Scoville, S. C. Madden +1
We have used previously published observations of the CO emission from the Antennae (NGC 4038/39) to study the detailed properties of the super giant molecular complexes with the g…
ISM Properties in Low-Metallicity Environments II. The Dust Spectral Energy Distribution of NGC 1569
F. Galliano, S. C. Madden, A. P. Jones +3
We present new 450 and 850 microns SCUBA data of the dwarf galaxy NGC 1569. We construct the mid-infrared to millimeter SED of NGC 1569, using ISOCAM, ISOPHOT, IRAS, KAO, SCUBA and…
Odin observations of H2O in the Galactic Centre
Aa. Sandqvist, P. Bergman, J. Black
The Odin satellite has been used to detect emission and absorption in the 557-GHz H2O line in the Galactic Centre towards the Sgr A* Circumnuclear Disk (CND), and the Sgr A +20 km/…
Molecular Gas in Candidate Double-Barred Galaxies II. Cooler, Less Dense Gas Associated with Stronger Central Concentrations
Glen Petitpas, Christine Wilson
We have performed a multi-transition CO study of the centers of seven double-barred galaxies that exhibit a variety of molecular gas morphologies to determine if the molecular gas…
The Nature of the Low-Metallicity ISM in the Dwarf Galaxy NGC 1569
F. Galliano, S. C. Madden, A. P. Jones +3
We are modeling the spectra of dwarf galaxies from infrared to submillimeter wavelengths to understand the nature of the various dust components in low-metallicity environments, wh…
Magnetic Fields in Star-Forming Molecular Clouds. V. Submillimeter Polarization of the Barnard 1 Dark Cloud
Brenda C. Matthews, Christine D. Wilson
We present 850 micron polarimetry from the James Clerk Maxwell Telescope toward several dense cores within the dark cloud Barnard 1 in Perseus. Significant polarized emission is de…
Molecular Gas in Candidate Double Barred Galaxies I. The Diverse Morphology and Dynamics of NGC 2273 and NGC 5728
Glen Petitpas, Christine Wilson
Double bars have been proposed as a means of transporting molecular gas past inner Lindblad resonances into the nuclear regions, where it can fuel active or starburst nuclei. Thus…
Gas Dynamics in NGC 5248: Fueling a Circumnuclear Starburst Ring of Super Star Clusters
Shardha Jogee, Isaac Shlosman, Seppo Laine +4
Through observations and modeling, we demonstrate how the recently discovered large-scale bar in NGC 5248 generates spiral structure which extends from 10 kpc down to 100 pc, fuels…
Magnetic Fields in Star-Forming Molecular Clouds IV. Polarimetry of the Filamentary NGC 2068 Cloud in Orion B
B. C. Matthews, C. D. Wilson
We present submillimeter polarimetry at 850 micron toward the filamentary star-forming region associated with the reflection nebulosity NGC 2068 in Orion B. These data were obtaine…
Magnetic Fields in Star-Forming Molecular Clouds II. The Depolarization Effect in the OMC-3 Filament of Orion A
B. C. Matthews, C. D. Wilson, J. D. Fiege
Polarized 850 micron thermal emission data of the region OMC-3 in the Orion A molecular cloud are presented. These data, taken in 1998 with the SCUBA polarimeter mounted on the Jam…
Comparing Giant Molecular Clouds in M31, M33 & the Milky Way
Kartik Sheth, Stuart N. Vogel, Christine D. Wilson +1
We present new observations of a 2' field in the north-eastern spiral arm of M31. In the 0.8 x 3.6 kpc mosaicked region, we have detected six distinct, large complexes of molecular…
Temperature and Density Gradients Across the Nucleus of M82
Glen R. Petitpas, Christine D. Wilson
This paper presents 12CO J=3-2, 13CO J=3-2, C18O J=3-2, and 13CO J=2-1 spectra of the irregular starburst galaxy M82 taken with the 15 m James Clerk Maxwell Telescope. All maps exh…
The Spatial Distribution of Atomic Carbon Emission in the Giant Molecular Cloud NGC 604-2
Christopher L. Taylor, Christine D. Wilson
We have mapped a giant molecular cloud in the giant HII region NGC 604 in M33 in the 492 GHz ^3P_1 -- ^3P_0 transition of neutral atomic carbon using the James Clerk Maxwell Telesc…
Magnetic Fields in Star-Forming Molecular Clouds I. The First Polarimetry of OMC-3 in Orion A
Brenda C. Matthews, Christine D. Wilson
The first polarimetric images of the OMC-3 region of the Orion A filamentary molecular cloud are presented. Using the JCMT, we have detected polarized thermal emission at 850 micro…
Submillimeter observations of IC 10: the dust properties and neutral carbon content of a low metallicity starburst
Alberto D. Bolatto, James M. Jackson, Christine D. Wilson +1
We present submillimeter observations of the Local Group, metal-poor, irregular dwarf galaxy IC 10, directly relevant to the interaction between interstellar medium and star format…