Results 81 to 90 of about 4,621,719 (221)
Oxygen fractionation in dense molecular clouds [PDF]
Monthly Notices of the Royal Astronomical Society, 2019 22 pages, 5 ...
Loison, Jean-Christophe +15 more
openaire +5 more sources
, 2017 Different from Milky-Way-like galaxies, discs of gas-rich galaxies are clumpy. It is believed that the clumps form because of gravitational instability.
Li, Guang-Xing
core +2 more sources
Comparative Analysis of Molecular Clouds in M31, M33 and the Milky Way [PDF]
, 2007 We present BIMA observations of a 2$\arcmin$ field in the northeastern spiral arm of M31. In this region we find six giant molecular clouds that have a mean diameter of 57$\pm$13 pc, a mean velocity width of 6.5$\pm$1.2 \kms, and a mean molecular mass of
Christine D. Wilson +7 more
core +2 more sources
CLOUD–CLOUD COLLISION AS A TRIGGER OF THE HIGH-MASS STAR FORMATION: A MOLECULAR LINE STUDY IN RCW 120 [PDF]
, 2015 RCW 120 is a Galactic H ii region that has a beautiful ring shape that is bright in the infrared. Our new CO J = 1–0 and J = 3–2 observations performed with the NANTEN2, Mopra, and ASTE telescopes have revealed that two molecular clouds with a velocity ...
K. Torii +13 more
semanticscholar +1 more source
Molecular Clouds: Formation and Disruption [PDF]
Astrophysics and Space Science, 2004 13 pages, 1 jpg figure, 1 eps figure. For publication in a proceedings issue of Astrophysics & Space Science recording the conference "From Observations to Self-Consistent Modeling of the Interstellar Medium", held in Porto ...
openaire +3 more sources
Anchoring Magnetic Field in Turbulent Molecular Clouds [PDF]
, 2009 One of the key problems in star formation research is to determine the role of magnetic fields. Starting from the atomic inter-cloud medium (ICM) which has density nH ~ 1 per cubic cm, gas must accumulate from a volume several hundred pc across in order ...
Alyssa Goodman +26 more
core +2 more sources
CHANGES OF DUST OPACITY WITH DENSITY IN THE ORION A MOLECULAR CLOUD [PDF]
, 2012 We have studied the opacity of dust grains at submillimeter wavelengths by estimating the optical depth from imaging at 160, 250, 350, and 500 μm from the Herschel Gould Belt Survey and comparing this to a column density obtained from the Two Micron All ...
A. Roy +14 more
semanticscholar +1 more source
Molecular Clouds in External Galaxies [PDF]
Symposium - International Astronomical Union, 1985 Observations of the large-scale distribution of molecular clouds in external galaxies offer a unique opportunity for investigating galactic evolution. New generations of stars form in these dense regions, and the most massive of these stars recycle their processed interiors into the interstellar medium.
openaire +2 more sources
Threshold between Spontaneous and Cloud-Collisional Star Formation
, 2006 Based on simple physical and geometric assumptions, we have calculated the mean surface molecular density of spiral galaxies at the threshold between star formation induced by cloud-cloud collision and spontaneous gravitational collapse.
Egusa, Fumi +2 more
core +1 more source
THE TWO MOLECULAR CLOUDS IN RCW 38: EVIDENCE FOR THE FORMATION OF THE YOUNGEST SUPER STAR CLUSTER IN THE MILKY WAY TRIGGERED BY CLOUD–CLOUD COLLISION [PDF]
, 2015 We present distributions of two molecular clouds having velocities of 2 and 14 km s−1 toward RCW 38, the youngest super star cluster in the Milky Way, in the 12CO J = 1–0 and 3–2 and 13CO J = 1–0 transitions.
Y. Fukui +15 more
semanticscholar +1 more source