CO TO H2 RATIO OF INTERSTELLAR MOLECULAR CLOUDS IN THE DIRECTIONS OF EARLY TYPE STARS [PDF]
Journal of Astronomy and Space Sciences, 2004 We present measurements of interstellar CO absorption lines in the spectra of 7 early-type stars that were observed with the FUSE(Far Ultraviolet Spectroscopic Explorer).
Jae-Woo Park +2 more
doaj +1 more source
The formation of molecular clouds [PDF]
Monthly Notices of the Royal Astronomical Society, 2001 In a recent paper, Elmegreen (2000) has made a cogent case, from an observational point of view, that the lifetimes of molecular clouds are comparable to their dynamical timescales. If so, this has important implications for the mechanisms by which molecular clouds form.
S. H. Lubow +4 more
openaire +4 more sources
On the structure of molecular clouds [PDF]
Monthly Notices of the Royal Astronomical Society, 2012 We show that the inter-cloud Larson scaling relation between mean volume density and size $ \propto R^{-1}$, which in turn implies that mass $M\propto R^2$, or that the column density $N$ is constant, is an artifact of the observational methods used.
Ballesteros-Paredes +5 more
openaire +5 more sources
Molecular line signatures of cloud–cloud collisions [PDF]
Monthly Notices of the Royal Astronomical Society, 2021 ABSTRACT Collisions between interstellar gas clouds are potentially an important mechanism for triggering star formation. This is because they are able to rapidly generate large masses of dense gas. Observationally, cloud collisions are often identified in position–velocity (PV) space through bridging features between intensity peaks ...
Anthony Peter Whitworth, F. D. Priestley
openaire +4 more sources
The Molecular Clouds in a Section of the Third Galactic Quadrant: Cloud Catalog
The Astronomical Journal, 2023 We present results of cloud catalogs of ^12 CO, ^13 CO, and C ^18 O ( J = 1–0) in a section of the third Galactic quadrant over (195° < l < 220°, ∣ b ∣ < 5°) from the Milky Way Imaging Scroll Painting project.
Chen Wang +8 more
doaj +1 more source
The dynamical evolution of molecular clouds near the Galactic Centre – II. Spatial structure and kinematics of simulated clouds [PDF]
Monthly notices of the Royal Astronomical Society, 2019 The evolution of molecular clouds in galactic centres is thought to differ from that in galactic discs due to a significant influence of the external gravitational potential.
J. Kruijssen +32 more
semanticscholar +1 more source
How Galactic Environment Affects the Dynamical State of Molecular Clouds and Their Star Formation Efficiency [PDF]
Astrophysical Journal, 2019 We investigate how the dynamical state of molecular clouds relates to host galaxy environment and how this impacts the star formation efficiency (SFE) in the Milky Way and seven nearby galaxies.
A. Schruba, J. Kruijssen, A. Leroy
semanticscholar +1 more source
The lifecycle of molecular clouds in nearby star-forming disc galaxies [PDF]
Monthly notices of the Royal Astronomical Society, 2019 It remains a major challenge to derive a theory of cloud-scale ($\lesssim100$ pc) star formation and feedback, describing how galaxies convert gas into stars as a function of the galactic environment.
M. Chevance +31 more
semanticscholar +1 more source
Molecular clouds in the Cosmic Snake normal star-forming galaxy 8 billion years ago [PDF]
Nature Astronomy, 2019 The cold molecular gas in contemporary galaxies is structured in discrete cloud complexes. These giant molecular clouds (GMCs), with 104–107 solar masses (M⊙) and radii of 5–100 parsecs, are the seeds of star formation1.
M. Dessauges-Zavadsky +14 more
semanticscholar +1 more source
Modeling UV Radiation Feedback from Massive Stars. II. Dispersal of Star-forming Giant Molecular Clouds by Photoionization and Radiation Pressure [PDF]
, 2018 UV radiation feedback from young massive stars plays a key role in the evolution of giant molecular clouds (GMCs) by photoevaporating and ejecting the surrounding gas.
Jeong-Gyu Kim +2 more
semanticscholar +1 more source