2014A&A...566A.129A


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.04CEST14:56:07

2014A&A...566A.129A - Astronomy and Astrophysics, volume 566A, 129-129 (2014/6-1)

The HH 34 outflow as seen in [FeII] 1.64 µm by LBT-LUCI.

ANTONIUCCI S., LA CAMERA A., NISINI B., GIANNINI T., LORENZETTI D., PARIS D. and SANI E.

Abstract (from CDS):

Dense atomic jets from young stars copiously emit in [FeII] IR lines, which can, therefore, be used to trace the immediate environments of embedded protostars. We want to investigate the morphology of the bright [FeII] 1.64µm line in the jet of the source HH34 IRS and compare it with the most commonly used optical tracer [SII]. We analyse a 1.64µm narrow-band filter image obtained with the Large Binocular Telescope (LBT) LUCI instrument, which covers the HH34 jet and counterjet. A point spread function deconvolution algorithm was applied to enhance spatial resolution and make the IR image directly comparable to a [SII] HST image of the same source. The [FeII] emission is detected from both the jet, the (weak) counter-jet, and from the HH34-S and HH34-N bow shocks. The deconvolved image allows us to resolve jet knots close to about 1''from the central source. The morphology of the [FeII] emission is remarkably similar to that of the [SII] emission, and the relative positions of [FeII] and [SII] peaks are shifted according to proper motion measurements, which were previously derived from HST images. An analysis of the [FeII]/[SII] emission ratio shows that Fe gas abundance is much lower than the solar value with up to 90% of Fe depletion in the inner jet knots. This confirms previous findings on dusty jets, where shocks are not efficient enough to remove refractory species from grains.

Abstract Copyright:

Journal keyword(s): stars: protostars - stars: mass-loss - stars: jets - ISM: jets and outflows - ISM: abundances - techniques: image processing

Simbad objects: 12

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Number of rows : 12

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 Reipurth 22 Y*O 05 35 28.5141362861 -06 27 01.932741262           ~ 18 0
2 2MASS J05352984-0626583 Y*O 05 35 29.8494479625 -06 26 58.295802627         18.18 ~ 90 0
3 HH 534 HH 05 35 30 -06 26.7           ~ 3 0
4 HH 34F HH 05 35 30.03 -06 27 11.4           ~ 9 0
5 HH 34G HH 05 35 30.06 -06 27 13.5           ~ 9 0
6 [HR92] 17 Y*O 05 35 30.4129623098 -06 27 07.296350570           M5.5 13 0
7 NAME HH 34 IRS 5 Em* 05 35 30.8 -06 26 45           ~ 19 0
8 HH 34 HH 05 35 31.30 -06 28 43.0     16     ~ 469 2
9 HH 34N HH 05 35 31.7 -06 24 26           ~ 33 0
10 HH 34D HH 05 35 32.0 -06 29 24           ~ 6 0
11 HH 34A HH 05 35 34.3 -06 29 07           ~ 10 0
12 HH 1 HH 05 36 20.8 -06 45 13           ~ 401 1

    Equat.    Gal    SGal    Ecl

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2020.07.04-14:56:07

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