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Observational identification of a sample of likely recent Common-Envelope Events
Theo Khouri, Wouter Vlemmings, Daniel Tafoya +5
One of the most poorly understood stellar evolutionary paths is that of binary systems undergoing common-envelope evolution, when the envelope of a giant star engulfs the orbit of…
EVN observations of 6.7 GHz methanol maser polarization in massive star-forming regions. V. Completion of the flux-limited sample
G. Surcis, W. H. T. Vlemmings, H. J. van Langevelde +2
Although the role of magnetic fields in launching molecular outflows in massive YSOs has been convincingly demonstrated by theoretical arguments, observationally, the alignment of…
Discovery of Molecular Line Polarization in the Disk of TW Hya
Richard Teague, Chat L. H. Hull, Stéphane Guilloteau +7
We report observations of polarized line and continuum emission from the disk of TW~Hya using the Atacama Large Millimeter/submillimeter Array. We target three emission lines, $^{1…
Maser emission from the CO envelope of the asymptotic giant branch star W Hydrae
W. H. T. Vlemmings, T. Khouri, D. Tafoya
Observation of CO emission around asymptotic giant branch (AGB) stars is the primary method to determine gas mass-loss rates. While radiative transfer models have shown that molecu…
DEATHSTAR: Nearby AGB stars with the Atacama Compact Array II. CO envelope sizes and asymmetries: The S-type stars
M. Andriantsaralaza, S. Ramstedt, W. H. T. Vlemmings +13
We aim to constrain the sizes of the CO circumstellar envelopes (CSEs) of 16 S-type stars, along with an additional 7 and 4 CSEs of C-type and M-type AGB stars, respectively. We ma…
SiO masers and 7 mm Continuum in Mira and R Aqr
W. D. Cotton, E. Humphreys, M. Wittkowski +5
Interactions between AGB stars and a secondary in a close orbit are one possible explanation of why some AGB stars develop into aspherical planetary nebulae. This study uses millim…