Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.14/88724
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- Title
- New insights on the complex planetary nebula Hen 2-113
- Related
- Astronomy and astrophysics, Vol. 448, No. 1 (2006), p.203-212
- DOI
- 10.1051/0004-6361:20053803
- Publisher
- EDP Sciences
- Date
- 2006
- FoR/RFCD Code(s)
-
020100 Astronomical and Space Sciences
- Author/Creator
- Lagadec, E
- Author/Creator
- Chesneau, O
- Author/Creator
- Matsuura, M
- Author/Creator
- De Marco, O
- Author/Creator
- de Freitas Pacheco, J. A
- Author/Creator
- Zijlstra, A. A
- Author/Creator
- Acker, A
- Author/Creator
- Clayton, G. C
- Author/Creator
- Lopez, B
- Description
- We report on infrared observations of the planetary nebula Hen 2-113 obtained with VLT/NACO, VLTI/MIDI, VLT/ISAAC and TIMMI at the ESO 3.6 m. Hen 2-113 exhibits a clear ring-like structure superimposed to a more diffuse environment visible in the L' (3.8 μm), M' (4.78 μm) and 8.7 μm bands. No clear core at 8.7 μm and no fringes through the N band could be detected for this object with MIDI. A qualitative interpretation of the object structure is proposed using a diabolo-like geometrical model. The PAH content of the nebula was also studied with ISAAC and TIMMI observations. This indicates that the PAHs are mostly concentrated towards the lobes of the diabolo and the bipolar lobes of the nebula. In L' band, a void 0.3″ in diameter was discovered with NACO around the central source. The L' and M' fluxes from the central source were derived from NACO data indicating an important infrared excess with respect to the expected stellar emission based on stellar models and short wavelength data. The observed flux from this source in the L' and M' is about 300 and 800 times respectively than those expected from a model including only the central star. Moreover, the central object appears resolved in L' band with measured FWHM of 155 mas. This infrared excess can be explained by emission from a cocoon of hot dust (T ~ 1000K) with a total mass ~10⁻⁹M⊙.
- Description
- 10 page(s)
- Subject Keyword
- 020100 Astronomical and Space Sciences
- Subject Keyword
- interferometric techniques
- Subject Keyword
- infrared
- Subject Keyword
- AGB and post AGB
- Subject Keyword
- circumstellar matter stars
- Subject Keyword
- imaging
- Subject Keyword
- high angular resolution
- Subject Keyword
- interferometric
- Resource Type
- journal article
- Organisation
- Macquarie University. Dept. of Physics and Astronomy
- Identifier
- http://hdl.handle.net/1959.14/88724
- Identifier
- ISSN:0004-6361
- Identifier
- mq-rm-2009006012
- Language
- eng
- Rights
- Copyright 2006 ESO. First published in Astronomy and Astrophysics, Vol. 448, No. 1, published by EDP Sciences. The original article can be found at http://dx.doi.org/10.1051/0004-6361:20053803
- Full Text
- Reviewed
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