16 citations · 81 across the 19 of their papers we have counts for
16 papers · 1 filter
Contributions of rotation, expansion and line broadening to the morpho-kinematics of the inner CSE of oxygen-rich AGB star R Hya
P. T. Nhung, D. T. Hoai, P. Darriulat +4
We use archival ALMA observations of the CO(2-1) and SiO(5-4) molecular line emissions of AGB star R Hya to illustrate the relative contributions of rotation, expansion and line br…
Recent mass ejection from AGB star W Hya
Do Thi Hoai, Pham Tuyet Nhung, Pierre Darriulat +4
We analyse archival ALMA (Atacama Large Millimeter/submillimeter Array) observations of two molecular line emissions, CO(3-2) and SiO(8-7), from oxygen-rich AGB (Asym…
ALMA Observations of W Hya: Impact of missing baselines
Do Thi Hoai, Pham Tuan Anh, Pham Tuyet Nhung +4
The lack of short baselines, referred to as short-spacing problem (SSP), is a well-known limitation of the performance of radio interferometers, causing a reduction of the detected…
Observation of high Doppler velocity wings in the nascent wind of R Doradus
D. T. Hoai, P. T. Nhung, P. Tuan-Anh +4
We study the morpho-kinematics in the nascent wind of AGB star R Doradus in the light of high Doppler velocity wings observed in the spectral lines of several species. We probe dis…
Morphology of the CO(3-2) millimeter emission across the gas disc surrounding the triple protostar GG Tau A using ALMA observations
N. T. Phuong, P. N. Diep, A. Dutrey +8
Observations by the Atacama Large Millimeter/sub-millimeter Array of the dust continuum and CO(3-2) millimeter emissions of the triple stellar system GG Tau A are analysed,…
High resolution ALMA observation of the CO(3-2) and 350 GHz continuum emissions of the debris disc of 49 Ceti
P. T. Nhung, D. T. Hoai, P. Tuan-Anh +4
We present high resolution ALMA observations of the CO(3-2) and 350 GHz continuum emissions of the debris disc of 49 Ceti, known to be particularly rich in molecular gas in spite o…
The axisymmetric envelopes of RS Cnc and EP Aqr
T. Le Bertre, D. T. Hoai, P. T. Nhung +1
We report on observations obtained at IRAM on two semi-regular variable Asymptotic Giant Branch (AGB) stars, RS Cnc and EP Aqr, undergoing mass loss at an intermediate rate of ~ 10…
Morphology and kinematics of the gas envelope of Mira Ceti
P. T. Nhung, D. T. Hoai, P. N. Diep +4
Observations of 12CO(3-2) emission of the circumbinary envelope of Mira Ceti, made by ALMA are analysed. The observed Doppler velocity distribution is made of three components: a b…
Morphology and kinematics of the gas envelope of protostar L1527 as obtained from ALMA observations of the CO(2-1) line emission
P. Tuan-Anh, P. T. Nhung, D. T. Hoai +4
Using ALMA observations of the CO(2-1) line emission of the gas envelope of protostar L1527, we have reconstructed its morphology and kinematics under the assumption of axis…
Space reconstruction of the morphology and kinematics of axisymmetric radio sources
P. N. Diep, N. T. Phuong, D. T. Hoai +4
The unprecedented quality of the observations available from the Atacama Large Millimetre/sub-millimetre Array (ALMA) calls for analysis methods making the best of them. Reconstruc…
Morphology and kinematics of the gas envelope of the Mira binary W Aquilae
D. T. Hoai, P. T. Nhung, P. N. Diep +4
We analyse ALMA observations of the 12CO(3-2) emission of the circumstellar envelope (CSE) of the Mira variable binary star W Aql. These provide, for the first time, spatially reso…
Morphology and kinematics of the gas envelope of the variable AGB star Gruis
P. T. Nhung, D. T. Hoai, P. N. Diep +4
Observations of the CO(3-2) emission of the circumstellar envelope (CSE) of the variable star Gru using the compact array (ACA) of the ALMA observatory have been recen…
CO and HI emission from the circumstellar envelopes of some evolved stars
P. N. Diep, D. T. Hoai, P. T. Nhung +7
Studies of the CO and HI radio emission of some evolved stars are presented using data collected by the IRAM Plateau de Bure interferometer and Pico Veleta telescope, the Nançay Ra…
CO emission from the Red Rectangle
Pham Tuan Anh, Pham Ngoc Diep, Do Thi Hoai +4
Observations of an unprecedented quality made by ALMA on the Red Rectangle of CO(3-2) and CO(6-5) emissions are analysed jointly with the aim of obtaining as simple as possible a d…
On the central symmetry of the circumstellar envelope of RS Cnc
Pham Tuyet Nhung, Do Thi Hoai, Jan Martin Winters +3
We present a phenomenological study of CO(1-0) and CO(2-1) emission from the circumstellar envelope (CSE) of the Asymptotic Giant Branch (AGB) star RS\,Cnc. It reveals departures f…
The multi-scale environment of RS Cnc from CO and HI observations
D. T. Hoai, L. D. Matthews, J. M. Winters +4
We present a detailed study of the circumstellar gas distribution and kinematics of the semi-regular variable star RS Cnc on spatial scales ranging from ~1" (~150 AU) to ~6' (~0.25…