2015ApJ...799..186G


C.D.S. - SIMBAD4 rel 1.7 - 2019.10.23CEST21:04:07

2015ApJ...799..186G - Astrophys. J., 799, 186 (2015/February-1)

The first "water fountain" collimated outflow in a planetary nebula.

GOMEZ J.F., SUAREZ O., BENDJOYA P., RIZZO J.R., MIRANDA L.F., GREEN J.A., USCANGA L., GARCIA-GARCIA E., LAGADEC E., GUERRERO M.A. and RAMOS-LARIOS G.

Abstract (from CDS):

"Water fountains" (WFs) are evolved objects showing high-velocity, collimated jets traced by water maser emission. Most of them are in the post-asymptotic giant branch (post-AGB) and they may represent one of the first manifestations of collimated mass loss in evolved stars. We present water maser, carbon monoxide, and mid-infrared spectroscopic data (obtained with the Australia Telescope Compact Array, Herschel Space Observatory, and the Very Large Telescope, respectively) toward IRAS 15103-5754, a possible planetary nebula (PN) with WF characteristics. Carbon monoxide observations show that IRAS 15103-5754 is an evolved object, while the mid-IR spectrum displays unambiguous [Ne II] emission, indicating that photoionization has started and thus, its nature as a PN is confirmed. Water maser spectra show several components spreading over a large velocity range (≃ 75 km/s) and tracing a collimated jet. This indicates that the object is a WF, the first WF known that has already entered the PN phase. However, the spatial and kinematical distribution of the maser emission in this object are significantly different from those in other WFs. Moreover, the velocity distribution of the maser emission shows a "Hubble-like" flow (higher velocities at larger distances from the central star), consistent with a short-lived, explosive mass-loss event. This velocity pattern is not seen in other WFs (which are presumably in earlier evolutionary stages). We therefore suggest that we are witnessing a fundamental change of mass-loss processes in WFs, with water masers being pumped by steady jets in post-AGB stars, but tracing explosive/ballistic events as the object enters the PN phase.

Abstract Copyright:

Journal keyword(s): masers - planetary nebulae: general - planetary nebulae: individual: IRAS 15103-5754 - stars: AGB and post-AGB - stars: mass-loss - stars: winds, outflows

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 - 2019
#notes
1 * e Cen PM* 12 53 06.9062265 -48 56 35.923798 7.28 5.70 4.33 3.35 2.60 K3/4III 45 0
2 IRAS 15103-5754 IR 15 14 18.5420562367 -58 05 20.412651176           ~ 29 0
3 OH 326.5 -0.4 pA* 15 48 19.37 -54 58 21.2           ~ 22 0
4 3FGL J1617.4-5846 AGN 16 17 17.8913859288 -58 48 07.860059063   18.23       ~ 77 1
5 NGC 6302 PN 17 13 44.339 -37 06 10.95   7.1 10.10     ~ 747 1
6 OH 9.097 -0.392 OH* 18 07 20.861 -21 16 10.86           ~ 32 0
7 IRAS 18286-0959 pA* 18 31 22.91 -09 57 22.2           ~ 29 0
8 OH 31.0 +0.0 OH* 18 47 41.13768 -01 45 11.4048           ~ 120 1
9 MSX6C G031.0126-00.2195 Mas 18 48 42.8 -01 48 40           ~ 42 0
10 QSO B1921-293 BLL 19 24 51.05595514 -29 14 30.1210524   18.71 18.21 15.07   ~ 650 0
11 PN K 3-35 PN 19 27 43.9751068155 +21 30 02.898607561           ~ 131 0
12 ICRF J193925.0-634245 Sy2 19 39 25.02671 -63 42 45.6255   18.87 18.37 17.64   ~ 918 1

    Equat.    Gal    SGal    Ecl

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2019.10.23-21:04:07

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