Discrete survey of 5-cm OH emission from planetary and proto-planetary nebulae

J.-F. Desmurs , Alain Baudry (1, 2, 3) , P. Sivagnanam , Carsten Henkel (4, 5, 6, 7) , A. M. S. Richards

1 L3AB - Laboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux
2 OASU - Observatoire aquitain des sciences de l'univers
3 LAB - Laboratoire d'Astrophysique de Bordeaux [Pessac]
4 Institut für Physik [Potsdam]
5 Institut für Physik
6 Institut für Physik [Potsdam]
7 Inst Phys

We have undertaken a comprehensive search for the first excited state of OH emission (J=5/2, 2?3/2) in Planetary and Proto- Planetary Nebulae. With the Effelsberg telescope, we confirm the detection of Vy 2?2 and we present one new detection in the pPN K3?35. This detection has been confirmed by subsequent observations made at 6035 MHz with the MERLIN interferometer. This is the first detection of 6 GHz OH maser emission from a post-AGB star.

Mots clés: Maser; stars: AGB and post-AGB; radio lines: stars

Domaines: Cosmologie et astrophysique extra-galactique [astro-ph.CO]; Cosmologie et astrophysique extra-galactique [astro-ph.CO]; Astrophysique [astro-ph]

J.-F. Desmurs, Alain Baudry, P. Sivagnanam, Carsten Henkel, A. M. S. Richards. Discrete survey of 5-cm OH emission from planetary and proto-planetary nebulae. Astrophysical Masers and their Environments, 12 to 16 March 2007, 2007, Alice Springs, Australia. pp.344-345, ⟨10.1017/S1743921307013348⟩. ⟨hal-00264961⟩