Journal
ASTRONOMY & ASTROPHYSICS
Volume 557, Issue -, Pages -Publisher
EDP SCIENCES S A
DOI: 10.1051/0004-6361/201322232
Keywords
stars: AGB and post-AGB; circumstellar matter; radio lines: stars; planetary nebulae: individual: Red Rectangle
Categories
Funding
- Spanish MICINN [CSD2009-00038]
- Spanish MINECO [AYA2009-07304, AYA2012-32032]
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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 (CO)-C-12 and (CO)-C-13 J = 3-2 and (CO)-C-12 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.
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