ALMA observations of the Red Rectangle, a preliminary analysis

Abstract

We aim to study equatorial disks in rotation and axial outflows in post-AGB objects, as to disclose the formation and shaping mechanisms in planetary nebulae. So far, both disks and outflows had not been observed simultaneously. We have 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 in which a disk in rotation has been mapped up to date. 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 occupies more or less the region placed 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.

5 pages, 5 figures

References in corpus (7)

• Validation of the new Hipparcos reduction
• Extended rotating disks around post-AGB stars
• Properties of the close binary and circumbinary torus of the Red Rectangle
• Application of MHD Disk Wind Solutions to Planetary/Protoplanetary Nebulae
• The nebula around the post-AGB star 89 Her
• Collimated Fast Winds in Wide Binary Progenitors of Planetary Nebulae
• Warm gas in the rotating disk of the Red Rectangle: accurate models of molecular line emission

Cited by in corpus (41)

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• An interferometric study of the post-AGB binary 89 Herculis. II Radiative transfer models of the circumbinary disk
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• JWST MIRI-MRS observations of the Red Rectangle: AIB class transformation in the outer nebula