Results 21 to 30 of about 468,387 (267)
MODELING THE MOLECULAR GAS IN NGC 6240 [PDF]
The Astrophysical Journal, 2015 We present the first observations of H$^{13}$CN$(1-0)$, H$^{13}$CO$^+(1-0)$ and SiO$(2-1)$ in NGC\,6240, obtained with the IRAM PdBI. Combining a Markov Chain Monte Carlo (MCMC) code with Large Velocity Gradient (LVG) modelling, and with additional data from the literature, we simultaneously fit three gas phases and six molecular species to constrain ...
R. Tunnard +7 more
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The molecular gas mass of M 33 [PDF]
Astronomy & Astrophysics, 2017 Do some environments favor efficient conversion of molecular gas into stars? To answer this, we need to be able to estimate the H2 mass. Traditionally, this is done using CO observations and a few assumptions but the Herschel observations which cover the far-IR dust spectrum make it possible to estimate the molecular gas mass independently of CO and ...
Gratier, P. +17 more
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Molecular gas toward G18.8+1.8 [PDF]
Astronomy & Astrophysics, 2012 This work aims at investigating the characteristics of the molecular gas associated with the nebula G18.8+1.8, linked to the Wolf-Rayet star HD168206 (WR 113), and its relation to other components of its local interstellar medium. We carried out molecular observations of the 12CO(J=1-0) and (J=2-1) lines with angular resolution of 44 arcsec and 22 ...
Vasquez, Javier +3 more
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Molecular Gas in Galactic Nuclei [PDF]
Highlights of Astronomy, 1989 Recent high resolution interferometric observations of the molecular gas in luminous IR galaxies reveal extraordinary concentrations of star forming material in the central few kpc. In several of the nearest IR bright galaxies, the molecular gas in the central regions is concentrated in a bar-like distribution (IC342, NGC 6946, and NGC 253) and in NGC ...
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Molecular gas in compact galaxies [PDF]
Astronomy & Astrophysics, 2005 New observations of 11 compact galaxies in the 12CO J=2-1 and J=3-2 transitions and literature data have been used to construct accurate line ratios in matched beams allowing LVG modelling of physical parameters. Fitting a single gas component to observed line ratios tends to produce physically unrealistic results, and is often not possible at all ...
openaire +3 more sources
The High Molecular Gas Content, and the Efficient Conversion of Neutral into Molecular Gas, in Jellyfish Galaxies [PDF]
The Astrophysical Journal Letters, 2020 Abstract In the disks of four jellyfish galaxies from the GASP sample at redshift ∼0.05 we detect molecular gas masses systematically higher than in field galaxies. These galaxies are being stripped of their gas by ram pressure from the intracluster medium and are, in general, forming stars at a high rate with respect to nonstripped ...
Alessia Moretti +13 more
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The molecular gas distribution in M51
The Astrophysical Journal, 1983 CO emission has been mapped along four strips in M51 using the 14 m Five College Radio Astronomy Observatory telescope (HPBW = 50'') in order to sample the radial distribution of molecular gas. The derived abundance of H/sub 2/ shows that three-fourths of the interstellar medium (ISM) nucleons are in H/sub 2/ rather than H I in the disk at ...
SCOVILLE, N, Young, JS
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Optimizing and Stabilizing the Gas Lift Operation by Controlling the Lift Gas Specific Gravity [PDF]
Journal of Petroleum Science and Technology, 2019 One of the factors which affects the gas lift performance is specific gravity of a lift gas (or the Molecular weight), which can influence the gas solubility in oil and has a direct effect on the gas lift performance.
Ehsan Khamehchi +2 more
doaj +1 more source
Metal-Multilayered Nanomechanical Cantilever Sensor for Detection of Molecular Adsorption
Biosensors, 2023 A metal-multilayered nanomechanical cantilever sensor was proposed to reduce the temperature effect for highly sensitive gas molecular detection.
Masaya Toda, Takahito Ono, Jun Okubo
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Materials & Design, 2020 Four spirobichroman-based polyimides (6FDA-F, 6FDA-O, 6FDA-P, and 6FDA-M) were successfully obtained via polyreaction between diamines of different substituents (-H, -OCH3, -N, and -CH3) and 4,4′-(hexafluoroisopropylidene)-diphthalic anhydride (6FDA ...
Shuli Wang +6 more
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