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A second post-AGB nebula that contains gas in rotation and in expansion: ALMA maps of IW Car
V. Bujarrabal, A. Castro-Carrizo, H. Van Winckel +2
We aim to study the presence of both rotation and expansion in post-AGB nebulae, in particular around IW Car, a binary post-AGB star that was suspected to be surrounded by a Kepler…
Clumpy molecular structures revolving the B[e] supergiant MWC 137
M. Kraus, L. S. Cidale, T. Liimets +10
The peculiar emission-line star MWC 137 with its extended optical nebula was recently classified as B[e] supergiant. To study the spatial distribution of its circumstellar molecula…
The Astropy Problem
Demitri Muna, Michael Alexander, Alice Allen +151
The Astropy Project (http://astropy.org) is, in its own words, "a community effort to develop a single core package for Astronomy in Python and foster interoperability between Pyth…
ALMA high spatial resolution observations of the dense molecular region of NGC 6302
M. Santander-García, V. Bujarrabal, J. Alcolea +5
The mechanism behind the shaping of bipolar planetary nebulae is still poorly understood. Accurately tracing the molecule-rich equatorial regions of post-AGB stars can give valuabl…
The double-degenerate, super-Chandrasekhar nucleus of the planetary nebula Henize 2-428
M. Santander-García, P. Rodríguez-Gil, R. L. M. Corradi +5
The planetary nebula (PN) stage is the ultimate fate of stars with mass 1 to 8 solar masses (M). The origin of their complex morphologies is poorly understood, although sev…
Further ALMA observations and detailed modeling of the Red Rectangle
V. Bujarrabal, A. Castro-Carrizo, J. Alcolea +3
We present new high-quality ALMA observations of the Red Rectangle (a well known post-AGB object) in C17O J=6-5 and H13CN J=4-3 line emission and results from a new reduction of al…