搜索结果: 1-15 共查到“天文学 Molecular Clouds”相关记录26条 . 查询时间(0.374 秒)
Radio and X-ray images of the SNR G18.8+0.3 interacting with molecular clouds
Radio X-ray images
2014/12/23
New HI images from the VLA Galactic Plane Survey (VGPS) show clear absorption features associated with the supernova remnant (SNR) G18.8+0.3. High-resolution 13CO images reveal that molecular clouds o...
We report the results of a large-area study of water vapor along the Orion Molecular Cloud ridge, the purpose of which was to determine the depth-dependent distribution of gas-phase water in dense mol...
Probing chemical evolution in molecular clouds with millimeter -wave observations
Cereal chemistry The interstellar medium Millimeter wavelength Molecular emission Dynamics Temperature observation The density of hydrogen molecules
2014/12/9
We present results for a study of gas-phase and grain chemical processes in the dense interstellar medium (ISM) using millimeter-wavelength observations of the pure rotational transitions of molecules...
Observations and Analysis of High-Resolution Magnetic Field Structures in Molecular Clouds
Observations Analysis High-Resolution Magnetic Field Structures Molecular Clouds
2012/2/23
Recent high-angular-resolution (up to 0.7") dust polarization observations toward star forming regions are summarized. With the Sub-Millimeter Array, the emission from the dense structures is traced a...
Identification of Ambient Molecular Clouds Associated with Galactic Supernova Remnant IC443
Ambient Molecular Clouds Associated Galactic Supernova Remnant IC443
2012/2/23
The Galactic supernova remnant (SNR) IC443 is one of the most studied core-collapse SNRs for its interaction with molecular clouds. However, the ambient molecular clouds with which IC443 is interactin...
The Turbulence Spectrum of Molecular Clouds in the Galactic Ring Survey: A Density-Dependent PCA Calibration
Turbulence Spectrum Molecular Clouds Galactic Ring Survey
2011/10/13
Turbulence plays a major role in the formation and evolution of molecular clouds. The problem is that turbulent velocities are convolved with the density of an observed region. To correct for this con...
A Correlation Between Surface Densities of Young Stellar Objects and Gas in Eight Nearby Molecular Clouds
Stellar Objects Gas Nearby Molecular Clouds
2011/9/28
We report the discovery and characterization of a power law correlation between the local surface densities of Spitzer-identified, dusty young stellar objects and the column density of gas (as traced ...
Forming Protostars in Molecular Clouds with Shocked Envelope Expansion and Core Collapse
ISM clouds — ISM individual (FeSt 1-457)— line: profiles — radiative transfer — stars
2010/11/12
Spectral observations of molecular line profiles reveal the so-called ‘blue profiles’ for
double-peaked molecular lines with stronger blue and weaker red peaks as notable features for star-forming cl...
How to use molecular clouds to study the propagation of cosmic rays in the Galaxy
cosmic rays:origin and propagation gamma rays molecular clouds
2010/11/12
Observations of molecular clouds in the gamma ray domain provide us with a tool to study the distribution of cosmic rays in the Galaxy. This is because cosmic rays can penetrate molecular clouds, unde...
Modeling CO Emission: I. CO as a Column Density Tracer and the X-Factor in Molecular Clouds
Modeling CO Emission X-Factor Molecular Clouds
2010/11/12
Theoretical and observational investigations have indicated that the abundance of car-bon monoxide (CO) is very sensitive to intrinsic properties of the gaseous medium,
such as density, metallicity, ...
Distribution of Water Vapor in Molecular Clouds
astrochemistry – ISM abundances – ISM clouds – ISM molecules astrochemistry – ISM abundances – ISM clouds – ISM molecules
2010/11/16
We report the results of a large-area study of water vapor along the Orion Molecular Cloud ridge, the purpose of which was to determine the depth-dependent distribution of gas-phase water in dense mol...
A method to determine distances to molecular clouds using near-IR photometry
ISM dust extinction – ISM clouds – Stars distances – ISM individual objects L1517 –ISM Chamaeleon I –ISM
2010/11/15
Aims. To develop a method to determine distances to molecular clouds using JHK near-infrared photometry.Methods. The method is based on a technique that aids spectral classification of stars lying tow...
Statistical study of dust properties in LMC molecular clouds
Galaxy Astrophysics (astro-ph.GA)
2011/1/5
The objective of this paper is to construct a catalog providing the dust properties and the star formation efficiency (SFE) of the molecular clouds in the Large Magellanic Cloud (LMC). We use the infr...
Physical Properties and Galactic Distribution of Molecular Clouds identified in the Galactic Ring Survey
Galaxy Astrophysics (astro-ph.GA)
2011/1/4
We derive the physical properties of 580 molecular clouds based on their 12CO and 13CO line emission detected in the University of Massachusetts-Stony Brook (UMSB) and Galactic Ring surveys.
Unusually Luminous Giant Molecular Clouds in the Outer Disk of M33
Cosmology and Extragalactic Astrophysics (astro-ph.CO)
2011/1/4
We use high spatial resolution (~7pc) CARMA observations to derive detailed properties for 8 giant molecular clouds (GMCs) at a galactocentric radius corresponding to approximately two CO scale length...