An ALMA view of the post-AGB object HD 101584
Paper in proceedings, 2016

ALMA cycles 1 and 3 observations of CO isotopologues and 1.3mm continuum are used in a study of the circumstellar environment of the binary HD 101584, a post-AGB star and a low-mass companion that is most likely a post-common-envelope-evolution system. These data are supplemented with new information from OH maser emission. It is inferred that the large- scale circumstellar medium has a bipolar hour-glass structure, seen almost pole-on, formed by an energetic, ≥ 150 km s-1, jet. Significant amount of material still resides in the central region. It is proposed that the circumstellar morphology is related to an event which took place ≤ 500 yr ago, possibly a capture event where the companion spiralled in towards the AGB star. Several observed features remain to be explained, and may hint to a more complicated scenario.

Author

Hans Olofsson

Chalmers, Earth and Space Sciences, Radio Astronomy and Astrophysics

Wouter Vlemmings

Chalmers, Earth and Space Sciences, Radio Astronomy and Astrophysics

Matthias Maercker

Chalmers, Earth and Space Sciences, Radio Astronomy and Astrophysics

E. Humphreys

European Southern Observatory (ESO)

Michael Lindqvist

Chalmers, Earth and Space Sciences, Onsala Space Observatory

L. Nyman

Atacama Large Millimeter-submillimeter Array (ALMA)

S. Ramstedt

Uppsala University

Journal of Physics: Conference Series

1742-6588 (ISSN)

Vol. 728 4

Subject Categories

Astronomy, Astrophysics and Cosmology

DOI

10.1088/1742-6596/728/4/042005

More information

Latest update

3/29/2018