2012MNRAS.421..346G

Query : 2012MNRAS.421..346G

2012MNRAS.421..346G - Mon. Not. R. Astron. Soc., 421, 346-355 (2012/March-3)

A fast bipolar H2 outflow from IRAS 16342-3814: an old star reliving its youth.

GLEDHILL T.M. and FORDE K.P.

Abstract (from CDS):

Some evolved stars in the pre-planetary nebula phase produce highly collimated molecular outflows that resemble the accretion-driven jets and outflows from pre-main-sequence stars. We show that IRAS 16342-3814 (the Water Fountain Nebula) is such an object and present K-band integral field spectroscopy revealing a fast (>150 km/s) bipolar H2outflow. The H2 emission is shock excited and may arise in fast-moving clumps, accelerated by the previously observed precessing jet. The total luminosity in H2is 0.37 L☉, which is comparable with that of accretion-powered outflows from Class 0 protostars. We also detect CO overtone bandhead emission in the scattered continuum, indicating hot molecular gas close to the centre, a feature also observed in a number of protostars with active jets. It seems likely that the jet and outflow in IRAS 16342-3814 are powered by accretion on to a binary companion.

Abstract Copyright: 2012 The Authors Monthly Notices of the Royal Astronomical Society2012 RAS

Journal keyword(s): shock waves - stars: AGB and post-AGB - circumstellar matter - stars: evolution - stars: individual: IRAS 16342-3814 - stars: individual: Water Fountain Nebula

Simbad objects: 16

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Number of rows : 16
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 HH 211 Y*O 03 43 56.52 +32 00 52.8           ~ 414 0
2 IRAS 04239+2436 Y*O 04 26 56.29704 +24 43 35.3280           ~ 163 0
3 RAFGL 618 pA* 04 42 53.6242032600 +36 06 53.400902220   16.32   12.59   C-rich 1027 0
4 2MASS J05352984-0626583 Or* 05 35 29.8502549712 -06 26 58.334492688         18.18 ~ 105 0
5 HH 34 HH 05 35 31.30 -06 28 43.0     16     ~ 493 2
6 HH 1 HH 05 36 20.8 -06 45 13           ~ 415 1
7 HH 212 HH 05 43 51.41 -01 02 53.1           ~ 443 1
8 2MASS J05460363-0014493 Y*O 05 46 03.63 -00 14 49.3           ~ 78 0
9 NAME HH 999-IRS Y*O 06 07 08.500 -11 17 51.23           ~ 17 0
10 JCMTSF J072007.9-240226 IR 07 20 08 -24 02.4           ~ 25 0
11 V* FU Dra SB* 15 34 45.2133432432 +62 16 44.333175900   11.16 10.55 10.182 9.817 G0: 145 1
12 IRAS 16342-3814 pA* 16 37 39.8691983808 -38 20 17.443998996           ~ 142 0
13 HD 156152 PM* 17 17 19.1955016824 -32 03 57.167050428   8.75 8.15     G3V 35 0
14 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
15 OH 017.7-02.0 pA* 18 30 30.703 -14 28 57.04           O-rich 145 1
16 IRAS 22036+5306 pA* 22 05 30.28608 +53 21 32.7888           F4III 79 0

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