Journal Article

The complex structure of HH 110 as revealed from Integral Field Spectroscopy

R. López, B. García-Lorenzo, S. F. Sánchez, G. Gómez, R. Estalella and A. Riera

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 406, issue 4, pages 2193-2205
Published in print August 2010 | ISSN: 0035-8711
Published online August 2010 | e-ISSN: 1365-2966 | DOI: http://dx.doi.org/10.1111/j.1365-2966.2010.16831.x
The complex structure of HH 110 as revealed from Integral Field Spectroscopy

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HH 110 is a rather peculiar HerbigHaro object in Orion that originates due to the deflection of another jet (HH 270) by a dense molecular clump, instead of being directly ejected from a young stellar object. Here we present new results on the kinematics and physical conditions of HH 110 based on Integral Field Spectroscopy. The 3D spectral data cover the whole outflow extent (∼4.5 arcmin, ≃0.6 pc at a distance of 460 pc) in the spectral range 6500–7000 Å. We built emission-line intensity maps of Hα, [N ii] and [S ii] and of their radial velocity channels. Furthermore, we analysed the spatial distribution of the excitation and electron density from [N ii]/Hα, [S ii]/Hα and [S ii] 6716/6731 integrated line-ratio maps, as well as their behaviour as a function of velocity, from line-ratio channel maps. Our results fully reproduce the morphology and kinematics obtained from previous imaging and long-slit data. In addition, the integral field spectroscopy (IFS) data revealed, for the first time, the complex spatial distribution of the physical conditions (excitation and density) in the whole jet, and their behaviour as a function of the kinematics. The results here derived give further support to the more recent model simulations that involve deflection of a pulsed jet propagating in an inhomogeneous ambient medium. The IFS data give richer information than that provided by current model simulations or laboratory jet experiments. Hence, they could provide valuable clues to constrain the space parameters in future theoretical works.

Keywords: ISM: individual objects: HH 110, HH 270; ISM: jets and outflows

Journal Article.  9420 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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