2016A&A...596A..26G


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.12CEST08:11:49

2016A&A...596A..26G - Astronomy and Astrophysics, volume 596A, 26-26 (2016/12-1)

Herschel/PACS far-IR spectral imaging of a jet from an intermediate mass protostar in the OMC-2 region.

GONZALEZ-GARCIA B., MANOJ P., WATSON D.M., VAVREK R., MEGEATH S.T., STUTZ A.M., OSORIO M., WYROWSKI F., FISCHER W., TOBIN J.J., SANCHEZ-PORTAL M., DIAZ RODRIGUEZ A.K. and WILSON T.L.

Abstract (from CDS):

We present the first detection of a jet in the far-IR [OI] lines from an intermediate mass protostar. This jet was detected in a Herschel/PACS spectral mapping study in the [OI] lines of OMC-2 FIR 3 and FIR 4, two of the most luminous protostars in Orion outside of the Orion Nebula. The spatial morphology of the fine structure line emission reveals the presence of an extended photodissociation region (PDR) and a narrow, but intense jet connecting the two protostars. The jet seen in [OI] emission is spatially aligned with the Spitzer/IRAC 4.5µm jet and the CO (6-5) molecular outflow centered on FIR 3. The mass-loss rate derived from the total [OI] 63µm line luminosity of the jet is 7.7x10–6M/yr, more than an order of magnitude higher than that measured for typical low-mass class 0 protostars. The implied accretion luminosity is significantly higher than the observed bolometric luminosity of FIR 4, indicating that the [OI] jet is unlikely to be associated with FIR 4. We argue that the peak line emission seen toward FIR 4 originates in the terminal shock produced by the jet driven by FIR 3. The higher mass-loss rate that we find for FIR 3 is consistent with the idea that intermediate-mass protostars drive more powerful jets than their low-mass counterparts. Our results also call into question the nature of FIR 4.

Abstract Copyright: © ESO, 2016

Journal keyword(s): ISM: jets and outflows - stars: formation - techniques: spectroscopic

VizieR on-line data: <Available at CDS (J/A+A/596/A26): list.dat fits/*>

Simbad objects: 9

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Number of rows : 9

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 NAME Orion Nebula Cluster OpC 05 35.0 -05 29           ~ 1977 1
2 NGC 1977 SFR 05 35 16.0 -04 49 15           ~ 185 0
3 M 42 HII 05 35 17.3 -05 23 28           ~ 3724 0
4 V* V2457 Ori Or* 05 35 26.97000 -05 09 54.4644         18.858 ~ 112 0
5 OMC 2 MoC 05 35 27 -05 10.1           ~ 383 1
6 2MASS J05352762-0509337 Y*O 05 35 27.622 -05 09 33.78           ~ 71 0
7 NAME Ori A MoC 05 38 -07.1           ~ 2675 0
8 NAME ORI MOL CLOUD MoC 05 56 -01.8           ~ 848 1
9 2MASS J08254384-5100326 Y*O 08 25 43.85 -51 00 32.7           ~ 298 1

    Equat.    Gal    SGal    Ecl

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2020.07.12-08:11:49

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