Velocity Structure in the Orion Nebula. I. Spectral Mapping in Low-Ionization Lines

High-dispersion echelle spectroscopy in optical forbidden lines of O0, S+, and S2+ is used to construct velocity-resolved images and electron-density maps of the inner region of the Orion Nebula with a resolution of 10 km s-1 X 3'' X 2''. Among the objects and regions revealed in...

Full description

Saved in:
Bibliographic Details
Published inThe Astronomical journal Vol. 133; no. 3; pp. 952 - 964
Main Authors García-Díaz, Ma. T, Henney, W. J
Format Journal Article
LanguageEnglish
Published IOP Publishing 01.03.2007
Online AccessGet full text

Cover

More Information
Summary:High-dispersion echelle spectroscopy in optical forbidden lines of O0, S+, and S2+ is used to construct velocity-resolved images and electron-density maps of the inner region of the Orion Nebula with a resolution of 10 km s-1 X 3'' X 2''. Among the objects and regions revealed in this study are (1) the Diffuse Blue Layer, an extended layer of moderately blueshifted, low-density, low-ionization emission in the southeast region of the nebula; (2) the Red Bay, a region to the east of the Trapezium where the usual correlation between velocity and ionization potential is very weak, and where the emitting layer is very thick; and (3) HH 873, a new redshifted jet to the southwest of the Trapezium.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ObjectType-Article-2
ObjectType-Feature-1
ISSN:1538-3881
0004-6256
1538-3881
DOI:10.1086/510621