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An unbiased NOEMA 2.6 to 4 mm survey of the GG Tau ring: First detection of CCS in a protoplanetary disk
N. T. Phuong, A. Dutrey, E. Chapillon +13
Molecular line surveys are among the main tools to probe the structure and physical conditions in protoplanetary disks (PPDs), the birthplace of planets. The large radial and verti…
Morpho-kinematics of the circumstellar envelope of the AGB star R Dor: a global view
P. T. Nhung, D. T. Hoai, P. Tuan-Anh +5
We analyse new ALMA observations of the SiO (=0, =87) and SO(=0, ) line emissions of the circumstellar envelope (CSE) of the oxygen-…
Revealing new features of the millimetre emission of the circumbinary envelope of Mira Ceti
D. T. Hoai, P. Tuan-Anh, P. T. Nhung +4
We study the morpho-kinematics of the circumbinary envelope of Mira Ceti between 100 and 350 au from the stars using ALMA observations of the SiO (=0, =5-4) and C…
GG Tau A: gas properties and dynamics from the cavity to the outer disk
N. T. Phuong, A. Dutrey, P. N. Diep +13
We used new ALMA CO and CO(3-2) observations obtained at high angular resolution (0.2") together with previous CO(3-2) and (6-5) ALMA data and continuum maps at…
The nascent wind of AGB star R Doradus: evidence for a recent episode of enhanced mass loss
P. T. Nhung, D. T. Hoai, P. Tuan-Anh +4
We analyse ALMA observations of the SO() emission of the circumstellar envelope of oxygen-rich AGB star R Dor, probing distances between 20 and 100 au from the star wh…
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…
Observation of narrow polar jets in the nascent wind of oxygen-rich AGB star EP Aqr
P. Tuan-Anh, D. T. Hoai, P. T. Nhung +6
Using ALMA observations of CO(2-1), SiO(5-4) and SO(16-17) emissions of the circumstellar envelope of AGB star EP Aqr, we describe the mo…
The morpho-kinematics of the circumstellar envelope around the AGB star EP Aqr
D. T. Hoai, P. T. Nhung, P. Tuan-Anh +6
ALMA observations of CO(1-0) and CO(2-1) emissions of the circumstellar envelope of EP Aqr, an oxygen-rich AGB star, are reported. A thorough analysis of their properties is presen…
ALMA observations of the circumstellar envelope around EP Aqr
P. T. Nhung, D. T. Hoai, P. Tuan-Anh +6
Atacama Large Millimetre/sub-millimetre Array (ALMA) observations of the CO(1-0) and CO(2-1) emissions from the circumstellar envelope of the Asymptotic Giant Branch (AGB) star EP…
First detection of HS in a protoplanetary disk. The dense GG Tau A ring
N. T. Phuong, E. Chapillon, L. Majumdar +8
Studying molecular species in protoplanetary disks is very useful to characterize the properties of these objects, which are the site of planet formation. We attempt to constrain t…
De-projection of radio observations of axi-symmetric expanding circumstellar envelopes
P. T. Nhung, D. T. Hoai, P. Tuan-Anh +5
The problem of de-projection of radio line observations of axi-symmetric expanding circumstellar envelopes is studied with the aim of easing their analysis in terms of physics mode…
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…
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…
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…
12CO emission from EP Aqr: Another example of an axi-symmetric AGB wind?
P. T. Nhung, D. T. Hoai, J. M. Winters +6
The CO(1-0) and (2-1) emission of the circumstellar envelope of the AGB star EP Aqr has been observed using the IRAM PdBI and the IRAM 30-m telescope. The line profiles reveal the…