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ALMA observations of the Red Rectangle, a preliminary analysis

Abstract :
Aims: We aim to study equatorial disks in rotation and axial outflows in post-AGB objects so as to disclose the formation and shaping mechanisms in planetary nebulae. So far, both disks and outflows have not been observed simultaneously.
Methods: We obtained high-quality ALMA observations of 12CO and 13CO J = 3-2 and 12CO J = 6-5 line emission in the Red Rectangle, the only post-AGB/protoplanetary object for which a disk in rotation has been mapped.
Results: These observations provide an unprecedented description of the complex structure of this source. Together with an equatorial disk in rotation, we find a low-velocity outflow that more or less occupies the region situated between the disk and the optical X-shaped nebula. From our observations and preliminary modeling of the data, we confirm the previously known properties of the disk and obtain a first description of the structure, dynamics, and physical conditions of the outflow.

Appendix A is available in electronic form at http://www.aanda.org

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https://hal-insu.archives-ouvertes.fr/insu-03614298
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V. Bujarrabal, A. Castro-Carrizo, J. Alcolea, H. van Winckel, C. Sánchez Contreras, et al.. ALMA observations of the Red Rectangle, a preliminary analysis. Astronomy and Astrophysics - A&A, EDP Sciences, 2013, 557, ⟨10.1051/0004-6361/201322232⟩. ⟨insu-03614298⟩

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