ALMA’s Acute View of pPNe: Through the Magnifying Glass... and What We Found There

We present recent Atacama Large Millimeter/submillimeter Array (ALMA)-based studies of circumstellar envelopes (CSEs) around Asymptotic Giant Branch (AGB) stars and pre-Planetary Nebulae (pPNe). In only a few years of operation, ALMA is revolutionising the field of AGB-to-PN research by providing un...

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Bibliographic Details
Published in:Galaxies 2018-09, Vol.6 (3), p.94
Main Authors: Contreras, Carmen, Alcolea, Javier, Bujarrabal, Valentín, Castro-Carrizo, Arancha
Format: Article
Language:English
Subjects:
Accretion disks
AGB and post-AGB stars
Angular resolution
Astrochemistry
Asymptotic giant branch stars
Binary system
circumstellar matter
Evolution
jets
Kinematics
mass-loss
Nebulae
Object recognition
Organic chemistry
Planetary nebulae
Radio telescopes
Rotating disks
Stellar envelopes
Stellar evolution
Wind
winds and outflows
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Summary:We present recent Atacama Large Millimeter/submillimeter Array (ALMA)-based studies of circumstellar envelopes (CSEs) around Asymptotic Giant Branch (AGB) stars and pre-Planetary Nebulae (pPNe). In only a few years of operation, ALMA is revolutionising the field of AGB-to-PN research by providing unprecedentedly detailed information on the complex nebular architecture (at large but also on small scales down to a few ∼10 AU from the centre), dynamics and chemistry of the outflows/envelopes of low-to-intermediate mass stars in their late stages of the evolution. Here, we focus on continuum and molecular line mapping studies with high angular resolution and sensitivity of some objects that are key to understanding the complex PN-shaping process. In particular, we offer (i) a brief summary of ALMA observations of rotating disks in post-AGB objects and (ii) report on ALMA observations of OH 231.8+4.2 providing the most detailed and accurate description of the global nebular structure and kinematics of this iconic object to date.
ISSN:2075-4434
2075-4434
DOI:10.3390/galaxies6030094