Issue |
EAS Publications Series
Volume 71-72, 2015
The Physics of Evolved Stars: A Conference Dedicated to the Memory of Olivier Chesneau
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Page(s) | 91 - 94 | |
Section | Winds, Mass Loss, Jets | |
DOI | https://doi.org/10.1051/eas/1571017 | |
Published online | 01 December 2015 |
E. Lagadec, F. Millour and T. Lanz (eds)
EAS Publications Series, 71–72 (2015) 91-94
The First Water Fountain in a Planetary Nebula with Synchrotron Emission
1 Laboratoire Lagrange, UMR 7293, Université de Nice Sophia-Antipolis, CNRS, Observatoire de la Côte d'Azur, 06304 Nice, France
2 Instituto de Astrofísica de Andalucía (IAA-CSIC), Glorieta de la Astronomía S/N, 18008 Granada, Spain
3 Institute of Astronomy, Astrophysics, Space Applications and Remote Sensing, National Observatory of Athens, 15236 Athens, Greece
4 SKA Organisation, Jodrell Bank Observatory, Lower Withington, Macclesfield SK11 9DL, UK
5 Centro de Astrobiología (INTA-CSIC), Ctra. M-108, km. 4, 28850 Torrejón de Ardoz, Spain
6 Instituto de Astronomía y Meteorología, Av. Vallarta No. 2602, Col. Arcos Vallarta, CP 44130 Guadalajara, Jalisco, Mexico
Planetary nebulae (PNe) show a great variety of morphologies at optical wavelengths that might be due to the effects of jets (Sahai & Trauger [8]) and where magnetic fields might also play an important role. The special class of “water fountain” stars, showing high-velocity, collimated jets traced by water maser emission are key objects to understand the transition to the PN phase and the effect of the jets. IRAS 15103–5754 has been revealed as the youngest PN known, caught just at its birth. It is the first PN that shows water fountain characteristics (Gómez et al. [5]), and it shows, for the first time, direct evidence of the presence of synchrotron emission in a PN, tracing energetic, magnetized shocks (Suárez et al. [9]). Moreover, we observed a sudden change in the spectral distribution of its radio continuum emission, which marks the fast, recent passage of the ionization front over the radio-emitting region (Suárez et al. [9]).
© EAS, EDP Sciences, 2015