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Spectra of Nearby Galaxies Measured with a New Very Broadband Receiver
Gopal Narayanan, Ronald L. Snell, Neal R. Erickson +4
Three-millimeter-wavelength spectra of a number of nearby galaxies have been obtained at the Five College Radio Astronomy Observatory (FCRAO) using a new, very broadband receiver.…
The Molecular Properties of Galactic HII Regions
L. D. Anderson, T. M. Bania, J. M. Jackson +5
We derive the molecular properties for a sample of 301 Galactic HII regions including 123 ultra compact (UC), 105 compact, and 73 diffuse nebulae. We analyze all sources within the…
Re-examining Larson's Scaling Relationships in Galactic Molecular Clouds
Mark Heyer, Coleman Krawczyk, Julia Duval +1
The properties of Galactic molecular clouds tabulated by Solomon etal (1987) (SRBY) are re-examined using the Boston University-FCRAO Galactic Ring Survey of 13CO J=1-0 emission. T…
The Five College Radio Astronomy Observatory CO Mapping Survey of the Taurus Molecular Cloud
Gopal Narayanan, Mark H. Heyer, Christopher Brunt +3
The FCRAO Survey of the Taurus Molecular Cloud observed the 12CO and 13CO J=1-0 emission from 98 square degrees of this important, nearby star forming region. This set of data with…
Large-Scale Structure of the Molecular Gas in Taurus Revealed by High Linear Dynamic Range Spectral Line Mapping
Paul F. Goldsmith, Mark Heyer, Gopal Narayanan +3
We report the results of a 100 square degree survey of the Taurus Molecular Cloud region in the J = 1-0 transition of 12CO and 13CO. The image of the cloud in each velocity channel…
Magnetically Aligned Velocity Anisotropy in the Taurus Molecular Cloud
Mark Heyer, Hao Gong, Eve Ostriker +1
Velocity anisotropy induced by MHD turbulence is investigated using computational simulations and molecular line observations of the Taurus molecular cloud. A new analysis method i…
The COMPLETE Survey of Star-Forming Regions: Phase I Data
Naomi A. Ridge, James Di Francesco, Helen Kirk +14
We present an overview of data available for the Ophiuchus and Perseus molecular clouds from ``Phase I'' of the COMPLETE Survey of Star-Forming Regions. This survey provides a rang…
The Boston University-Five College Radio Astronomy Observatory Galactic Ring Survey
J. M. Jackson, J. M. Rathborne, R. Y. Shah +8
The Boston University-Five College Radio Astronomy Observatory Galactic Ring Survey is a new survey of Galactic 13CO (1-0) emission. The survey used the SEQUOIA multi pixel array o…
Turbulent Gas Flows in the Rosette and G216-2.5 Molecular Clouds: Assessing Turbulent Fragmentation Descriptions of Star Formation
M. Heyer, J. Williams, C. Brunt
The role of turbulent fragmentation in regulating the efficiency of star formation in interstellar clouds is examined from new wide field imaging of 12CO and 13CO J=1-0 emission fr…
The Universality of Turbulence in Galactic Molecular Clouds
Mark Heyer, Christopher Brunt
The universality of interstellar turbulence is examined from observed structure functions of 27 giant molecular clouds and Monte Carlo modeling. We show that the structure function…
The Molecular Gas Distribution and Schmidt Law in M33
M. H. Heyer, E. Corbelli, S. E. Schneider +1
The relationship between the star formation rate and surface density of neutral gas within the disk of M33 is examined with new imaging observations of CO J=1-0 emission gathered w…
Turbulence in the Star-forming Interstellar Medium: Steps toward Constraining Theories with Observations
Mark Heyer, Ellen Zweibel
Increasingly sophisticated observational tools and techniques are now being developed for probing the nature of interstellar turbulence. At the same time, theoretical advances in u…
High resolution imaging of CO outflows in OMC-2 and OMC-3
Jonathan P. Williams, R. L. Plambeck, Mark H. Heyer
A large scale, high resolution map of CO(1-0) emission toward the OMC-2 and OMC-3 star forming regions is presented. The map is a mosaic of 46 fields using the Berkeley-Illinois-Ma…
Interstellar Turbulence: II. Energy Spectra of Molecular Regions in the Outer Galaxy
Christopher M. Brunt, Mark H. Heyer
The multivariate tool of Principal Component Analysis (PCA) is applied to 23 fields in the FCRAO CO Survey of the Outer Galaxy. PCA enables the identification of line profile diffe…
A Mapping Survey of the 12CO and 13CO Emission in Galaxies
Timothy A. D. Paglione, W. F. Wall, Judith S. Young +6
We present spectra of the extended 12CO and 13CO J=1-0 emission along the major axes of 17 nearby galaxies. Spatial variations in the ratio of CO and 13CO integrated intensities, R…
The Equilibrium State of Molecular Regions in the Outer Galaxy
M. H. Heyer, J. M. Carpenter, R. L. Snell
A summary of global properties and an evaluation of the equilibrium state of molecular regions in the outer Galaxy are presented from the decomposition of the FCRAO Outer Galaxy Su…
Interstellar Turbulence: I. Retrieval of Velocity Field Statistics
C. Brunt, M. H. Heyer
We demonstrate the capability of Principal Component Analysis (PCA) as applied by Heyer & Schloerb (1997) to extract the statistics of turbulent interstellar velocity fields as mea…
Embedded Stellar Clusters in the W3/W4/W5 Molecular Cloud Complex
John M. Carpenter, Mark H. Heyer, Ronald L. Snell
We analyze the embedded stellar content in the vicinity of the W3/W4/W5 HII regions using the FCRAO Outer Galaxy 12CO(J=1-0) Survey, the IRAS Point Source Catalog, published radio…