20 citations · 35 across the 10 of their papers we have counts for
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The Last Gasps of a Dying Star: ALMA Observations of the Pre-Planetary Nebula IRAS 06530-0213
Raghvendra Sahai, Wouter Vlemmings, Guillermo Quintana-Lacaci +16
We present high angular-resolution () ALMA observations of millimeter-wave line and continuum emission (at and mm) in the pre-planetary ne…
A surprisingly large asymmetric ejection from Mira A
T. Khouri, W. H. T. Vlemmings, D. A. Raudales Oseguera +6
Stars with masses between roughly 1 and 8~ end their lives on the asymptotic giant branch (AGB), when intense mass loss takes place. The outflows are generally accepted to…
ALMA observations of CO isotopologues towards six obscured post-AGB stars
T. Khouri, D. Tafoya, W. H. T. Vlemmings +13
Low- and intermediate-mass stars evolve through the asymptotic giant branch (AGB), when an efficient mass-loss process removes a significant fraction of their initial mass. A subst…
High-Speed Outflows and Dusty Disks during the AGB to PN Transition: The PANORAMA survey
Raghvendra Sahai, Javier Alcolea, Bruce Balick +15
As mass-losing asymptotic giant branch (AGB) stars evolve to planetary nebulae (PNe), the mass outflow geometries transform from nearly spherical to extreme aspherical. The physica…
Probing the dynamical and kinematical structures of detached shells around AGB stars
M. Maercker, E. De Beck, T. Khouri +6
Aims. We aim to resolve the spatial and kinematic sub-structures in five detached-shell sources to provide detailed constraints for hydrodynamic models that describe the formation…
An empirical view of the extended atmosphere and inner envelope of the AGB star R Doradus I. Physical model based on CO lines
T. Khouri, H. Olofsson, W. H. T. Vlemmings +6
The mass loss experienced on the asymptotic giant branch (AGB) at the end of the lives of low- and intermediate-mass stars is widely accepted to rely on radiation pressure acting o…
Charting Circumstellar Chemistry of Carbon-rich AGB Stars: I. ALMA 3 mm spectral surveys
R. Unnikrishnan, E. De Beck, L. A. Nyman +10
AGB stars are major contributors to the chemical enrichment of the ISM through nucleosynthesis and extensive mass loss. Most of our current knowledge of AGB atmospheric and circums…
DEATHSTAR: Nearby AGB stars with the Atacama Compact Array I. CO envelope sizes and asymmetries: A new hope for accurate mass-loss-rate estimates
S. Ramstedt, W. H. T. Vlemmings, L. Doan +16
This is the first publication of the DEATHSTAR project. The goal of the project is to reduce the uncertainties of observational estimates of mass-loss rates from Asymptotic Giant B…
X-ray emission from the Wolf-Rayet bubble NGC 6888. II. XMM-Newton EPIC observations
J. A. Toalá, M. A. Guerrero, Y. -H. Chu +3
We present deep XMM-Newton EPIC observations of the Wolf-Rayet (WR) bubble NGC6888 around the star WR136. The complete X-ray mapping of the nebula confirms the distribution of the…