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24 papers · 2 filters
A Model for the Onset of Self-gravitation and Star Formation in Molecular Gas Governed by Galactic Forces: I. Cloud-scale Gas Motions
Sharon E. Meidt, Adam K. Leroy, Erik Rosolowsky +10
Modern extragalactic molecular gas surveys now reach the scales of star-forming giant molecular clouds (GMCs, 20-50 pc). Systematic variations in GMC properties with galaxy environ…
The EDGE-CALIFA survey: the influence of galactic rotation on the molecular depletion time across the Hubble sequence
D. Colombo, V. Kalinova, D. Utomo +15
We present a kpc-scale analysis of the relationship between the molecular depletion time () and the orbital time () across the field of…
The Green Bank Ammonia Survey: Unveiling the Dynamics of the Barnard 59 star-forming Clump
E. Redaelli, F. O. Alves, P. Caselli +17
Understanding the early stages of star formation is a research field of ongoing development, both theoretically and observationally. In this context, molecular data have been conti…
Statistical properties of galactic CMB foregrounds: dust and synchrotron
D. Kandel, A. Lazarian, D. Pogosyan
Recent Planck observations have revealed some of the important statistical properties of synchrotron and dust polarisation, namely, the to mode power and temperature- (T…
The Survey of Water and Ammonia in the Galactic Center (SWAG): Molecular Cloud Evolution in the Central Molecular Zone
Nico Krieger, Jürgen Ott, Henrik Beuther +21
The Survey of Water and Ammonia in the Galactic Center (SWAG) covers the Central Molecular Zone (CMZ) of the Milky Way at frequencies between 21.2 and 25.4 GHz obtained at the Aust…
The Green Bank Ammonia Survey: Observations of Hierarchical Dense Gas Structures in Cepheus-L1251
Jared Keown, James Di Francesco, Helen Kirk +20
We use Green Bank Ammonia Survey observations of NH (1,1) and (2,2) emission with 32'' FWHM resolution from a ~ 10 pc portion of the Cepheus-L1251 molecular cloud to iden…
Galaxy evolution in the metric of the Cosmic Web
K. Kraljic, S. Arnouts, C. Pichon +19
The role of the cosmic web in shaping galaxy properties is investigated in the GAMA spectroscopic survey in the redshift range . The stellar mass, du…
CARMA Survey toward Infrared-bright Nearby Galaxies (STING). IV. Spatially Resolved 13CO in Spiral Galaxies
Yixian Cao, Tony Wong, Rui Xue +5
We present a mapping survey of 12 nearby galaxies from the CARMA STING sample. The line intensity ratio $\mathcal{R} \equiv I[^{12}\mathrm{…
Can the observed E/B ratio for dust galactic foreground be explained by sub-Alfvenic turbulence?
D. Kandel, A. Lazarian, D. Pogosyan
Recent Planck observations of dust polarization in the Galaxy have revealed that the power in mode is twice that in mode. Caldwell et. al. have formulated a theoretical mod…
The Green Bank Ammonia Survey: Dense Cores Under Pressure in Orion A
Helen Kirk, Rachel K. Friesen, Jaime E. Pineda +21
We use gas temperature and velocity dispersion data from the Green Bank Ammonia Survey and core masses and sizes from the James Clerk Maxwell Telescope Gould Belt Survey to estimat…
A High Resolution Survey of the Galactic Plane at 408 MHz
Albert Tung, Roland Kothes, Tom Landecker +6
The interstellar medium is a complex 'ecosystem' with gas constituents in the atomic, molecular, and ionized states, dust, magnetic fields, and relativistic particles. The Canadian…
ALMA Observations of a Quiescent Molecular Cloud in the Large Magellanic Cloud
Tony Wong, Annie Hughes, Kazuki Tokuda +19
We present high-resolution (sub-parsec) observations of a giant molecular cloud in the nearest star-forming galaxy, the Large Magellanic Cloud. ALMA Band 6 observations trace the b…
Identifying Tools for Comparing Simulations and Observations of Spectral-line Data Cubes
Eric W. Koch, Caleb G. Ward, Stella Offner +2
We present a statistical framework to compare spectral-line data cubes of molecular clouds and use the framework to perform an analysis of various statistical tools developed from…
Thermal Feedback in the high-mass star and cluster forming region W51
Adam Ginsburg, Ciriaco Goddi, J. M. Diederik Kruijssen +11
High-mass stars have generally been assumed to accrete most of their mass while already contracted onto the main sequence, but this hypothesis has not been observationally tested.…
A Galactic Molecular Cloud Clump Catalog from Hi-GAL Data: Method and Initial Results Comparison to BGPS
Erika Zetterlund, Jason Glenn, Erik Rosolowsky
As the precursors to stellar clusters, it is imperative that we understand the distribution and physical properties of dense molecular gas clouds and clumps. Such a study has been…
Cloud structure of three Galactic infrared dark star-forming regions from combining ground and space based bolometric observations
Yuxin Lin, Hauyu Baobab Liu, James E. Dale +12
We have modified the iterative procedure introduced by Lin et al. (2016), to systematically combine the submm images taken from ground based (e.g., CSO, JCMT, APEX) and space (e.g.…
The Green Bank Ammonia Survey (GAS): First Results of NH3 mapping the Gould Belt
Rachel K. Friesen, Jaime E. Pineda, Erik Rosolowsky +21
We present an overview of the first data release (DR1) and first-look science from the Green Bank Ammonia Survey (GAS). GAS is a Large Program at the Green Bank Telescope to map al…
The EDGE-CALIFA survey: Variations in the Molecular Gas Depletion Time in Local Galaxies
Dyas Utomo, Alberto D. Bolatto, Tony Wong +14
We present results from the EDGE survey, a spatially resolved CO(1-0) follow-up to CALIFA, an optical Integral Field Unit (IFU) survey of local galaxies. By combining the data prod…
The EDGE-CALIFA Survey: Interferometric Observations of 126 Galaxies with CARMA
Alberto D. Bolatto, Tony Wong, Dyas Utomo +21
We present interferometric CO observations made with the Combined Array for Millimeter-wave Astronomy (CARMA) of galaxies from the Extragalactic Database for Galaxy Evolution surve…
Effects of dust absorption on spectroscopic studies of turbulence
D. Kandel, A. Lazarian, D. Pogosyan
We study the effect of dust absorption on the recovery velocity and density spectra as well as on the anisotropies of magnetohydrodynamic turbulence using the Velocity Channel Anal…
The Varying Mass Distribution of Molecular Clouds Across M83
Pamela Freeman, Erik Rosolowsky, J. M. Diederik Kruijssen +2
The work of Adamo et al. (2015) showed that the mass distributions of young massive stellar clusters were truncated above a maximum-mass scale in the nearby galaxy M83 and that thi…
The JCMT Nearby Galaxies Legacy Survey -- XI. -- Environmental Variations in the Atomic and Molecular Gas Radial Profiles of Nearby Spiral Galaxies
Angus Mok, C. D. Wilson, J. H. Knapen +3
We present an analysis of the radial profiles of a sample of 43 HI-flux selected spiral galaxies from the Nearby Galaxies Legacy Survey (NGLS) with resolved James Clerk Maxwell Tel…
Dense Molecular Gas Tracers in the Outflow of the Starburst Galaxy NGC 253
Fabian Walter, Alberto D. Bolatto, Adam K. Leroy +12
We present a detailed study of a molecular outflow feature in the nearby starburst galaxy NGC 253 using ALMA. We find that this feature is clearly associated with the edge of NGC 2…
The JCMT Gould Belt Survey: A First Look at IC 5146
D. Johnstone, S. Ciccone, H. Kirk +53
We present 450 and 850 micron submillimetre continuum observations of the IC5146 star-forming region taken as part of the JCMT Gould Belt Survey. We investigate the location of bri…