The interstellar medium of dwarf galaxies: new insights from Machine Learning analysis of emission-line spectra [PDF]
Monthly Notices of the Royal Astronomical Society, 2018 Dwarf galaxies are ideal laboratories to study the physics of the interstellar medium (ISM). Emission lines have been widely used to this aim. Retrieving the full information encoded in the spectra is therefore essential. This can be efficiently and reliably done using Machine Learning (ML) algorithms.
Ucci, G +8 more
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Challenges and Techniques for Simulating Line Emission
Galaxies, 2018 Modeling emission lines from the millimeter to the UV and producing synthetic spectra is crucial for a good understanding of observations, yet it is an art filled with hazards. This is the proceedings of “Walking the Line”, a 3-day conference
Karen P. Olsen +11 more
doaj +3 more sources
Photon yields of energetic particles in the interstellar medium: An easy way to calculate gamma-ray line emission [PDF]
Astronomy & Astrophysics, 2002 A gamma-ray line production calculation in astrophysics depends on i) the composition and energy source spectrum of the energetic particles, ii) the propagation model, and iii) the nuclear cross sections. The main difficulty for model predictions and data interpretation comes from the fact that the spectrum of the particles which actually interact in ...
Parizot, E., Lehoucq, R.
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An Interstellar Emission Line from Isocyanic Acid at 1.4 Centimeters
Astrophysical Journal, 1972 David Buhl
exaly +2 more sources
First Principles Rovibronic Absorption Spectra of HF Molecule. [PDF]
J Comput ChemHydrogen fluoride (HF) is astrophysically important, as it has been detected in sunspots, Venus, red giants, and the interstellar medium, serving as a probe of exoplanet atmospheres. This article presents an ab initio investigation of HF rovibronic spectroscopy, combining high‐level electronic‐structure data with nuclear‐motion solutions and refinement
Abu El Kher N +5 more
europepmc +2 more sources
New and Improved Lyα Reconstructions for M and K Dwarfs
The Astrophysical Journal, 2023 The Ly α emission line is the brightest UV emission line in M and K dwarf spectra and serves as an important tool for studies of stellar chromospheres, the interstellar medium, and exoplanet atmospheres.
Angeli Sandoval +3 more
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A Complete HCN Survey of the Perseus Molecular Cloud
The Astrophysical Journal, 2023 We present a survey of the Perseus molecular cloud in the J = 1 → 0 transition of HCN, a widely used tracer of dense molecular gas. The survey was conducted with the CfA 1.2 m telescope, which at 89 GHz has a beamwidth of 11′ and a spectral resolution of
T. M. Dame, Charles J. Lada
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Diagnosing the interstellar medium of galaxies with far-infrared emission lines [PDF]
Astronomy & Astrophysics, 2021 Context. Atomic fine structure lines have been detected in the local Universe and at high redshifts over the past decades. The [C II] emission line at 158 μm is an important observable as it provides constraints on the interstellar medium (ISM) cooling processes. Aims.
A. F. Ramos Padilla +4 more
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Planetary Nebulae and the Ionization of the Interstellar Medium in Galaxies
Frontiers in Astronomy and Space Sciences, 2022 We discuss the role of planetary nebulae and their progeny in galaxy context in terms of ionization of the galaxy interstellar medium. This regards ionized gas outside the disk of spiral galaxies, the diffuse ionized medium in spiral galaxies, and the ...
Grażyna Stasińska +2 more
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The Wardle Instability in Interstellar Shocks. II. Gas Temperature and Line Emission [PDF]
The Astrophysical Journal, 1997 16 pages, 6 Postscript figures, LaTeX, accepted by Ap ...
Neufeld, David A., Stone, James M.
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