VolDen: A tool to extract number density from the column density of filamentary molecular clouds
Sign Up to like & getrecommendations! Published in 2024 at "Journal of Astrophysics and Astronomy"
DOI: 10.1007/s12036-024-10033-9
Abstract: Gas volume density is one of the critical parameters, along with dispersions in magnetic field position angles and non-thermal gas motions, for estimating the magnetic field strength using the Davis–Chandrasekhar–Fermi (DCF) relation or through its… read more here.
Keywords: column density; extract number; density; number density ... See more keywords
Io's SO2 atmosphere from HST Lyman-α images: 1997 to 2018
Sign Up to like & getrecommendations! Published in 2020 at "Icarus"
DOI: 10.1016/j.icarus.2020.114212
Abstract: Abstract The atmosphere of Jupiter's volcanic moon Io consists of mainly sulfur dioxide (SO2), and this main constituent has been studied with a variety of observing techniques across many wavelengths over the years. Here we… read more here.
Keywords: 1997 2018; so2 column; column; so2 ... See more keywords
Multi-wavelength campaign on NGC 7469 - II. Column densities and variability in the X-ray spectrum
Sign Up to like & getrecommendations! Published in 2018 at "Astronomy and Astrophysics"
DOI: 10.1051/0004-6361/201731655
Abstract: We have investigated the ionic column density variability of the ionized outflows associated with NGC 7469, to estimate their location and power. This could allow a better understanding of galactic feedback of AGNs to their… read more here.
Keywords: column densities; column; variability; ngc 7469 ... See more keywords
A diagnostic to measure time-resolved atom column density and Doppler temperature in atomic vapors produced by laser ablation
Sign Up to like & getrecommendations! Published in 2023 at "Review of Scientific Instruments"
DOI: 10.1063/5.0141592
Abstract: We report on the development of a diagnostic to measure the time-resolved column density and Doppler temperature of atomic vapors produced by laser ablation. The diagnostic is based on the strong frequency dependence of the… read more here.
Keywords: column density; doppler temperature; temperature atomic; time ... See more keywords
CO-to-H2 conversion and spectral column density in molecular clouds: the variability of the XCO factor
Sign Up to like & getrecommendations! Published in 2020 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/staa2056
Abstract: Analyzing the Galactic plane CO survey with the Nobeyama 45-m telescope, we compared the spectral column density (SCD) of H$_2$ calculated for $^{12}$CO line using the current conversion factor $X_{\rm CO}$ to that for $^{13}$CO… read more here.
Keywords: molecular clouds; conversion; density; column density ... See more keywords
The evolution of the low-density H i intergalactic medium from z = 3.6 to 0: Data, transmitted flux and H i column density*†‡
Sign Up to like & getrecommendations! Published in 2020 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/staa3844
Abstract: We present a new, uniform analysis of the HI transmitted flux (F) and HI column density (N(HI)) distribution in the low-density IGM as a function of redshift z for 0 read more here.
Keywords: density; low density; flux column; column density ... See more keywords
MUSEQuBES: The Column Density, Covering Fraction, Mass, and Environmental Dependence of Cool H i Gas Around Low-Redshift Galaxies
Sign Up to like & getrecommendations! Published in 2025 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/staf2080
Abstract: We investigate cool H i gas traced by Lyman series absorption around 256 galaxies at z ≈ 0.48 (median stellar mass, $\log _{10}~(M_{\star }/\rm {\rm M}_{\odot })$ =8.7) using 15 background quasars (median impact parameter, D… read more here.
Keywords: star; column density; covering fraction; mass ... See more keywords
On the shape and completeness of the column density probability distribution function of molecular clouds
Sign Up to like & getrecommendations! Published in 2018 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/sty3071
Abstract: Bastian Kortgen and Robi Banerjee acknowledge funding from the German Science Foundation (DFG) within the Priority Programm ‘The Physics of the ISM’ (SPP 1573) via the grant BA 3706/3-2. RB further acknowledges funding for this… read more here.
Keywords: completeness column; density probability; probability distribution; column density ... See more keywords
A Remote Sensing Technique for CO2 Column Density
Sign Up to like & getrecommendations! Published in 2025 at "IEEE Transactions on Geoscience and Remote Sensing"
DOI: 10.1109/tgrs.2025.3579265
Abstract: Ground-based remote sensing, as a critical technique for monitoring atmospheric greenhouse gas column density and calibrating satellite data, provides robust scientific support for establishing carbon accounting systems, studying regional carbon cycles, assessing the effectiveness of… read more here.
Keywords: carbon; column density; column; remote sensing ... See more keywords