A silicate disk in the heart of the Ant

O. Chesneau, F. Lykou, B. Balick, E. Lagadec, M. Matsuura, Nathan Smith, A. Spang, S. Wolf, A. A. Zijlstra

Research output: Contribution to journalArticle

35 Citations (Scopus)

Abstract

Aims. We aim at getting high spatial resolution information on the dusty core of bipolar planetary nebulae to directly constrain the shaping process. Methods. We present observations of the dusty core of the extreme bipolar planetary nebula Menzel 3 (Mz 3, Hen 2-154, the Ant) taken with the mid-infrared interferometer MIDI/VLTI and the adaptive optics NACO/VLT. Results. The core of Mz 3 is clearly resolved with MIDI in the interferometric mode, whereas it is unresolved from the Ks to the N bands with single dish 8.2 m observations on a scale ranging from 60 to 250 mas. A striking dependence of the dust core size with the PA angle of the baselines is observed, that is highly suggestive of an edge-on disk whose major axis is perpendicular to the axis of the bipolar lobes. The MIDI spectrum and the visibilities of Mz 3 exhibit a clear signature of amorphous silicate, in contrast to the signatures of crystalline silicates detected in binary post-AGB systems, suggesting that the disk might be relatively young. We used radiative-transfer Monte Carlo simulations of a passive disk to constrain its geometrical and physical parameters. Its inclination (74° ± 3°) and position angle (5° ± 5°) are in accordance with the values derived from the study of the lobes. The inner radius is 9 ±1 AU and the disk is relatively flat. The dust mass stored in the disk, estimated as 1 × 10-5 M , represents only a small fraction of the dust mass found in the lobes and might be a kind of relic of an essentially polar ejection process.

Original languageEnglish (US)
JournalAstronomy and Astrophysics
Volume473
Issue number3
DOIs
StatePublished - Oct 2007
Externally publishedYes

Fingerprint

ant
silicates
silicate
dust
lobes
planetary nebulae
interferometer
visibility
radiative transfer
signatures
infrared interferometers
spatial resolution
parabolic reflectors
adaptive optics
ejection
inclination
simulation
radii
high resolution
method

Keywords

  • Planetary nebulae: individual: Mz 3
  • Stars: circumstellar matter
  • Stars: mass-loss
  • Techniques: high angular resolution
  • Techniques: interferometric

ASJC Scopus subject areas

  • Space and Planetary Science

Cite this

Chesneau, O., Lykou, F., Balick, B., Lagadec, E., Matsuura, M., Smith, N., ... Zijlstra, A. A. (2007). A silicate disk in the heart of the Ant. Astronomy and Astrophysics, 473(3). https://doi.org/10.1051/0004-6361:20078268

A silicate disk in the heart of the Ant. / Chesneau, O.; Lykou, F.; Balick, B.; Lagadec, E.; Matsuura, M.; Smith, Nathan; Spang, A.; Wolf, S.; Zijlstra, A. A.

In: Astronomy and Astrophysics, Vol. 473, No. 3, 10.2007.

Research output: Contribution to journalArticle

Chesneau, O, Lykou, F, Balick, B, Lagadec, E, Matsuura, M, Smith, N, Spang, A, Wolf, S & Zijlstra, AA 2007, 'A silicate disk in the heart of the Ant', Astronomy and Astrophysics, vol. 473, no. 3. https://doi.org/10.1051/0004-6361:20078268
Chesneau O, Lykou F, Balick B, Lagadec E, Matsuura M, Smith N et al. A silicate disk in the heart of the Ant. Astronomy and Astrophysics. 2007 Oct;473(3). https://doi.org/10.1051/0004-6361:20078268
Chesneau, O. ; Lykou, F. ; Balick, B. ; Lagadec, E. ; Matsuura, M. ; Smith, Nathan ; Spang, A. ; Wolf, S. ; Zijlstra, A. A. / A silicate disk in the heart of the Ant. In: Astronomy and Astrophysics. 2007 ; Vol. 473, No. 3.
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