Velocity Structure in the Orion Nebula. II. Emission Line Atlas of Partially Ionized to Fully Ionized Gas

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dc.creatorGarcía-Díaz, Ma. T.
dc.creatorHenney, W. J.
dc.creatorLópez, J. A.
dc.creatorDoi, T.
dc.creator.
dc.date2008-02-04
dc.date.accessioned2026-07-07T09:18:45Z
dc.date.available2026-07-07T09:18:45Z
dc.descriptionWe present an atlas of three-dimensional (position-position-velocity) spectra of the Orion Nebula in optical emission lines from a variety of different ionization stages: [O I] 6300, [S II] 6716,6731, [N II] 6584, [S III] 6312, H alpha 6563, and [O III] 5007. These transitions provide point to point information about the physical structure and kinematics of the nebula at an effective resolution of 3'' x 2'' x 10 km/s, clearly showing the large scale behavior of the ionized gas and the presence of localized phenomena such as Herbig-Haro outflows. As an example application of the atlas, we present a statistical analysis of the widths of the H alpha, [O III], and [N II] lines that permits a determination of the mean electron temperature in the nebula of (9200 +/- 400) K. We also find, in contradiction to previous claims, that the non-thermal line broadening is not significantly different between recombination lines and collisional lines.
dc.description34 pages, 22 figures, RevMexAA in press. High resolution figures and data available from http://www.astrosmo.unam.mx/~w.henney/orionatlas
dc.identifierhttps://arxiv.org/abs/0802.0518
dc.identifierhttp://arxiv.org/abs/0802.0518
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/154139
dc.subjectAstrophysics
dc.titleVelocity Structure in the Orion Nebula. II. Emission Line Atlas of Partially Ionized to Fully Ionized Gas
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