Gemini-IFU spectroscopy of HH 111

Journal Article · Sun Mar 01 00:00:00 EST 2015 · Astronomical Journal (New York, N.Y. Online)

DOI:https://doi.org/10.1088/0004-6256/149/3/98· OSTI ID:22342090

Cerqueira, A. H.; Vasconcelos, M. J.; Feitosa, J.; Plana, H. ^[1]

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1. LATO-DCET, Universidade Estadual de Santa Cruz Rod. Jorge Amado, km 16, Ilhéus, BA, CEP 45662-900 (Brazil)

We present new optical observations of the Herbig–Haro (HH) 111 jet using the Gemini Multi Object Spectrograph in its Integral Field Unit mode. Eight fields of 5{sup ′′}×3.{sup ′′}5 have been positioned along and across the HH 111 jet, covering the spatial region from knot E to L in HH 111 (namely, knots E, F, G, H, J, K, and L). We present images and velocity channel maps for the [O i] 6300+6360, Hα, [N ii] 6548+6583, and [S ii] 6716+6730 lines, as well as for the [S ii] 6716/6730 line ratio. We find that the HH 111 jet has an inner region with lower excitation and higher radial velocity, surrounded by a broader region of higher excitation and lower radial velocity. Also, we find higher electron densities at lower radial velocities. These results imply that the HH 111 jet has a fast, axial region with lower velocity shocks surrounded by a lower velocity sheath with higher velocity shocks.

• OSTI ID: 22342090
• Journal Information: Astronomical Journal (New York, N.Y. Online), Vol. 149, Issue 3; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 1538-3881
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
COVERINGS
ELECTRON DENSITY
EXCITATION
GALAXIES
HERBIG-HARO OBJECTS
IMAGES
MAPS
RADIAL VELOCITY
SPECTROSCOPY
STARS