F. Herpin
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View article: Evidence for the Keplerian orbit of a close companion around a giant star
Evidence for the Keplerian orbit of a close companion around a giant star Open
View article: An accreting dwarf star orbiting the S-type giant star <i>π</i><sup>1</sup> Gru
An accreting dwarf star orbiting the S-type giant star <i>π</i><sup>1</sup> Gru Open
Context. At the end of their lives, low- to intermediate-mass stars reach the asymptotic giant branch (AGB), during which their photospheres expand by up to several hundred times and strong stellar winds develop. These changes lead to vari…
View article: NASCENT-stars large program: origin of molecular complexity towards emerging high-mass protostars
NASCENT-stars large program: origin of molecular complexity towards emerging high-mass protostars Open
During the star formation process, the interstellar medium gets enriched in a complex zoo of molecules. The extremely rich chemistry of the star forming gas holds the key to constrain the link between the chemistry of disks and their formi…
View article: SiO maser polarization and magnetic field in evolved cool stars
SiO maser polarization and magnetic field in evolved cool stars Open
Context. Magnetic fields, photospheric and atmospheric dynamics can be involved in triggering the high mass loss observed in evolved cool stars. Previous works have revealed that the magnetic field of these objects extends beyond their sur…
View article: SiO maser polarization and magnetic field in evolved cool stars
SiO maser polarization and magnetic field in evolved cool stars Open
Both magnetic fields and photospheric/atmospheric dynamics can be involved in triggering the important mass loss observed in evolved cool stars. Previous works have revealed that these objects exhibit a magnetic field extending beyond thei…
View article: ALMA-IMF
ALMA-IMF Open
Context. The star formation process leads to an increased chemical complexity in the interstellar medium. Sites associated with high-mass star and cluster formation exhibit a so-called hot core phase, characterized by high temperatures and…
View article: ALMA-IMF
ALMA-IMF Open
Context. One of the central questions in astrophysics is the origin of the initial mass function (IMF). It is intrinsically linked to the processes from which it originates, and hence its connection with the core mass function (CMF) must b…
View article: Chemical tracers of a highly eccentric AGB–main-sequence star binary
Chemical tracers of a highly eccentric AGB–main-sequence star binary Open
View article: ATOMIUM: Molecular inventory of 17 oxygen-rich evolved stars observed with ALMA
ATOMIUM: Molecular inventory of 17 oxygen-rich evolved stars observed with ALMA Open
Context. The dusty winds of cool evolved stars are a major contributor of the newly synthesised material enriching the Galaxy and future generations of stars. However, the details of the physics and chemistry behind dust formation and wind…
View article: ALMA-IMF
ALMA-IMF Open
ALMA-IMF is an Atacama Large Millimeter/submillimeter Array (ALMA) Large Program designed to measure the core mass function (CMF) of 15 protoclusters chosen to span their early evolutionary stages. It further aims to understand their kinem…
View article: ATOMIUM: Probing the inner wind of evolved O-rich stars with new, highly excited H$_2$O and OH lines
ATOMIUM: Probing the inner wind of evolved O-rich stars with new, highly excited H$_2$O and OH lines Open
Water and the hydroxyl radical are major constituents of the envelope of O-rich late-type stars. Transitions involving energy levels that are highly excited have been observed in both H$_2$O and OH. These and more recently discovered trans…
View article: ATOMIUM: Probing the inner wind of evolved O-rich stars with new, highly excited H<sub>2</sub>O and OH lines
ATOMIUM: Probing the inner wind of evolved O-rich stars with new, highly excited H<sub>2</sub>O and OH lines Open
Context. Water (H 2 O) and the hydroxyl radical (OH) are major constituents of the envelope of O-rich late-type stars. Transitions involving energy levels that are rotationally or vibrationally highly excited (energies ≳4000 K) have been o…
View article: Chemical tracers of a highly eccentric binary orbit
Chemical tracers of a highly eccentric binary orbit Open
Binary interactions have been proposed to explain a variety of circumstellar structures seen around evolved stars, including asymptotic giant branch (AGB) stars and planetary nebulae. Studies resolving the circumstellar envelopes of AGB st…
View article: The VLT/SPHERE view of the ATOMIUM cool evolved star sample
The VLT/SPHERE view of the ATOMIUM cool evolved star sample Open
Context . Low- and intermediate-mass asymptotic giant stars and massive red supergiant stars are important contributors to the chemical enrichment of the Universe. They are among the most efficient dust factories of the Galaxy, harboring c…
View article: The VLT/SPHERE view of the ATOMIUM cool evolved star sample. I. Overview: Sample characterization through polarization analysis
The VLT/SPHERE view of the ATOMIUM cool evolved star sample. I. Overview: Sample characterization through polarization analysis Open
Aims. Through the ATOMIUM project, based on an ALMA large program, we aim to present a consistent view of a sample of 17 nearby cool evolved stars (Aymptotic Giant Branch and red supergiant stars). Methods. Here we present VLT/SPHERE-ZIMPO…
View article: Water masers high resolution measurements of the diverse conditions in evolved star winds
Water masers high resolution measurements of the diverse conditions in evolved star winds Open
We compare detailed observations of multiple H 2 O maser transitions around the red supergiant star VY CMa with models to constrain the physical conditions in the complex outflows. The temperature profile is consistent with a variable mass…
View article: ALMA explores the inner wind of evolved O-rich stars with two widespread vibrationally excited transitions of water
ALMA explores the inner wind of evolved O-rich stars with two widespread vibrationally excited transitions of water Open
ALMA observations with angular resolution in the range ∼20–200 mas demonstrate that emission at 268.149 and 262.898 GHz in the (0,2,0) and (0,1,0) vibrationally excited states of water are widespread in the inner envelope of O-rich AGB sta…
View article: ALMA-IMF
ALMA-IMF Open
Context. Hot cores are signposts of the protostellar activity of dense cores in star-forming regions. W43-MM1 is a young region that is very rich in terms of high-mass star formation, which is highlighted by the presence of large numbers o…
View article: ALMA-IMF
ALMA-IMF Open
Aims. The processes that determine the stellar initial mass function (IMF) and its origin are critical unsolved problems, with profound implications for many areas of astrophysics. The W43-MM2&MM3 mini-starburst ridge hosts a rich young pr…
View article: ALMA-IMF
ALMA-IMF Open
Aims. Thanks to the high angular resolution, sensitivity, image fidelity, and frequency coverage of ALMA, we aim to improve our understanding of star formation. One of the breakthroughs expected from ALMA, which is the basis of our Cycle 5…
View article: ALMA-IMF
ALMA-IMF Open
We present the first data release of the ALMA-IMF Large Program, which covers the 12m-array continuum calibration and imaging. The ALMA-IMF Large Program is a survey of fifteen dense molecular cloud regions spanning a range of evolutionary…
View article: ATOMIUM: ALMA tracing the origins of molecules in dust forming oxygen rich M-type stars
ATOMIUM: ALMA tracing the origins of molecules in dust forming oxygen rich M-type stars Open
This overview paper presents ATOMIUM , a Large Programme in Cycle 6 with the Atacama Large Millimeter/submillimeter Array (ALMA). The goal of ATOMIUM is to understand the dynamics and the gas phase and dust formation chemistry in the winds…
View article: ATOMIUM: halide molecules around the S-type AGB star W Aquilae
ATOMIUM: halide molecules around the S-type AGB star W Aquilae Open
Context. S-type asymptotic giant branch (AGB) stars are thought to be intermediates in the evolution of oxygen- to carbon-rich AGB stars. The chemical compositions of their circumstellar envelopes are also intermediate but have not been st…
View article: ATOMIUM: Halide molecules around the S-type AGB star W Aquilae
ATOMIUM: Halide molecules around the S-type AGB star W Aquilae Open
S-type asymptotic giant branch (AGB) stars are thought to be intermediates in the evolution of oxygen- to carbon-rich AGB stars. The chemical compositions of their circumstellar envelopes are also intermediate, but have not been studied in…
View article: ATOMIUM: The astounding complexity of the near circumstellar environment of the M-type AGB star R Hydrae
ATOMIUM: The astounding complexity of the near circumstellar environment of the M-type AGB star R Hydrae Open
Evolved low- to intermediate-mass stars are known to shed their gaseous envelope into a large, dusty, molecule-rich circumstellar nebula which typically develops a high degree of structural complexity. Most of the large-scale, spatially co…
View article: Heterodyne Receiver for Origins
Heterodyne Receiver for Origins Open
The Heterodyne Receiver for Origins (HERO) is the first detailed study of a heterodyne focal plane array receiver for space applications. HERO gives the Origins Space Telescope the capability to observe at very high spectral resolution (R …
View article: Water in star-forming regions: physics and chemistry from clouds to disks as probed by <i>Herschel</i> spectroscopy
Water in star-forming regions: physics and chemistry from clouds to disks as probed by <i>Herschel</i> spectroscopy Open
Context. Water is a key molecule in the physics and chemistry of star and planet formation, but it is difficult to observe from Earth. The Herschel Space Observatory provided unprecedented sensitivity as well as spatial and spectral resolu…
View article: ATOMIUM: A high-resolution view on the highly asymmetric wind of the AGB star π1Gruis. I: First detection of a new companion and its effect on the inner wind
ATOMIUM: A high-resolution view on the highly asymmetric wind of the AGB star π1Gruis. I: First detection of a new companion and its effect on the inner wind Open
The nebular circumstellar environments of cool evolved stars are known to harbour a rich morphological complexity of gaseous structures on different length scales. A large part of these density structures are thought to be brought about by…
View article: ATOMIUM: A high-resolution view on the highly asymmetric wind of the AGB star<i>π</i><sup>1</sup>Gruis
ATOMIUM: A high-resolution view on the highly asymmetric wind of the AGB star<i>π</i><sup>1</sup>Gruis Open
The nebular circumstellar environments of cool evolved stars are known to harbour a rich morphological complexity of gaseous structures on different length scales. A large part of these density structures are thought to be brought about by…
View article: Atomium: A high-resolution view on the highly asymmetric wind of the AGB star Pi1 Gruis. I. First detection of a new companion and its effect on the inner wind
Atomium: A high-resolution view on the highly asymmetric wind of the AGB star Pi1 Gruis. I. First detection of a new companion and its effect on the inner wind Open
The nebular circumstellar environments of cool evolved stars are known to harbour a rich morphological complexity of gaseous structures on different length scales. A large part of these density structures are thought to be brought about by…