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Galaxies 2018, 6(4), 100; https://doi.org/10.3390/galaxies6040100

Challenges and Techniques for Simulating Line Emission

1
School of Earth and Space Exploration, Arizona State University, 781 South Terrace Road, Tempe, AZ 85287, USA
2
Centro Fermi, Museo Storico della Fisica e Centro Studi e Ricerche “Enrico Fermi”, Piazza del Viminale 1, 00184 Roma, Italy
3
Scuola Normale Superiore, Piazza dei Cavalieri 7, 56126 Pisa, Italy
4
Instituto de Astronomía, Universidad Nacional Autónoma de México, Unidad Académica en Ensenada, Km 103 Carr. Tijuana-Ensenada, Ensenada 22860, Mexico
5
Department of Physics & Astronomy, University of Kentucky, Lexington, KY 40506, USA
6
Department of Physics and Astronomy, Georgia State University, 25 Park Place, Suite 605, Atlanta, GA 30303, USA
7
Max-Planck-Institut für Astronomie, Königstuhl 17, D-69117 Heidelberg, Germany
8
Instituto de Radioastronomía y Astrofísica, UNAM, Morelia, Michoacán 58089, Mexico
9
Cosmic DAWN Centre, Niels Bohr Institute, University of Copenhagen, Juliane Maries Vej 30, 2100 Copenhagen, Denmark
10
Department of Astrophysics, American Museum of Natural History, 79th Street at Central Park West, New York, NY 10024, USA
11
Sorbonne Universités, UPMC-CNRS, UMR7095, Institut d’Astrophysique de Paris, F-75014 Paris, France
12
CLASP, College of Engineering, University of Michigan, Ann Arbor, MI 48109, USA
*
Author to whom correspondence should be addressed.
Received: 3 July 2018 / Revised: 24 August 2018 / Accepted: 1 September 2018 / Published: 20 September 2018
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Abstract

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 held in 2018 that brought together scientists working on different aspects of emission line simulations, in order to share knowledge and discuss the methodology. Emission lines across the spectrum from the millimeter to the UV were discussed, with most of the focus on the interstellar medium, but also some topics on the circumgalactic medium. The most important quality of a useful model is a good synergy with observations and experiments. Challenges in simulating line emission are identified, some of which are already being worked upon, and others that must be addressed in the future for models to agree with observations. Recent advances in several areas aiming at achieving that synergy are summarized here, from micro-physical to galactic and circum-galactic scale. View Full-Text
Keywords: simulation; line emission; galaxies; ISM; radiative transfer; hydrodynamic simulations; CGM; AGN simulation; line emission; galaxies; ISM; radiative transfer; hydrodynamic simulations; CGM; AGN
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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MDPI and ACS Style

Olsen, K.P.; Pallottini, A.; Wofford, A.; Chatzikos, M.; Revalski, M.; Guzmán, F.; Popping, G.; Vázquez-Semadeni, E.; Magdis, G.E.; Richardson, M.L.A.; Hirschmann, M.; Gray, W.J. Challenges and Techniques for Simulating Line Emission. Galaxies 2018, 6, 100.

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