Explanipedia

Edge-On Disk Study (EODS) Open

A. Dutrey, Otoniel Denis‐Alpizar, S. Guilloteau, Cristina San Juan - Foucher, Sacha Gavino , et al. · 2025

Context . Investigating the vertical distribution of molecular content in protoplanetary disks remains difficult in most disks mildly inclined along the line of sight. In contrast, edge-on disks provide a direct (tomographic) view of the 2…

Edge-On Disk Study (EODS) Open

S. Guilloteau, Otoniel Denis‐Alpizar, A. Dutrey, Cristina San Juan - Foucher, Sacha Gavino , et al. · 2025

Context. The dust and gas temperature in protoplanetary disks play critical roles in determining their chemical evolution and influencing planet formation processes. Aims. We attempted an accurate measurement of the dust and CO temperature…

Chemistry in the GG Tau A Disk: Constraints from H2D+, N2H+, and DCO+ High Angular Resolution ALMA Observations Open

Parashmoni Kashyap, Liton Majumdar, A. Dutrey, S. Guilloteau, Karen Willacy , et al. · 2024

Resolved molecular line observations are essential for gaining insight into the physical and chemical structure of protoplanetary disks, particularly in cold, dense regions where planets form and acquire their chemical compositions. Howeve…

Sulfur monoxide (SO) as a shock tracer in protoplanetary disks: Case of AB Aurigae Open

A. Dutrey, Edwige Chapillon, S. Guilloteau, Ya‐Wen Tang, A. Boccaletti , et al. · 2024

Context. Sulfur monoxide (SO) is known to be a good shock tracer in molecular clouds and protostar environments, but its abundance is difficult to reproduce, even with state-of-the-art astrochemical models. Aims. We investigate the propert…

Chemistry in the GG Tau A Disk: Constraints from H2D+, N2H+, and DCO+ High Angular Resolution ALMA Observations Open

Parashmoni Kashyap, Liton Majumdar, A. Dutrey, S. Guilloteau, Karen Willacy , et al. · 2024

Resolved molecular line observations are essential for gaining insight into the physical and chemical structure of protoplanetary disks, particularly in cold, dense regions where planets form and acquire their chemical compositions. Howeve…

Planet-disk interactions in the AB Aurigae system: revisiting the hypothetical vortex Open

Thomas Collin-Dufresne, E. Di Folco, A. Pierens · 2024

I] ContextStructures and asymmetries detected in protoplanetary disks offer an exciting means to characterize the orbital and physical properties of embedded proto-planets, which are suspected to sculpt some of the observed features. A doz…

Polarization in the GG Tau Ring—Confronting Dust Self-scattering, Dust Mechanical and Magnetic Alignment, Spirals, and Dust Grain Drift Open

Ya‐Wen Tang, A. Dutrey, Patrick M. Koch, S. Guilloteau, Hsi-Wei Yen , et al. · 2023

We report Atacama Large Millimeter/submillimeter Array (ALMA) polarization observations at 3 and 0.9 mm toward the GG Tau A system. In the ring, the percentage is relatively homogeneous at 3 mm, being 1.2%, while it exhibits a clear radial…

How many forming planets in the transitional disk around AB Aurigae ? Open

E. Di Folco, A. Boccaletti, A. Dutrey, Ya‐Wen Tang, S. Guilloteau , et al. · 2022

AB Aur is a bright and young Herbig Ae star surrounded by a broad transitional disk, with a long record of detailed observations at various wavelengths. Multiple direct and indirect evidences for the presence of embedded proto-pla…

Radial distribution of the carbonaceous nano-grains in the protoplanetary disk around HD 169142 Open

Marie Devinat, E. Habart, E. Pantin, N. Ysard, A. P. Jones , et al. · 2022

HD 169142 is part of the class of (pre-)transitional protoplanetary disks showing multiple carbon nanodust spectroscopic signatures (aromatic, aliphatic) dominating the infrared spectrum. Precise constraints on the spatial distribution and…

Radial distribution of the carbonaceous nano-grains in the protoplanetary disk around HD 169142 Open

Marie Devinat, E. Habart, É. Pantin, N. Ysard, A. P. Jones , et al. · 2022

Context. HD 169142 is part of the class of (pre-)transitional protoplanetary disks showing multiple carbon nanodust spectroscopic signatures (aromatic, aliphatic) dominating the infrared spectrum. Precise constraints on the spatial distrib…

Lack of other molecules in CO-rich debris discs: is it primordial or secondary gas? Open

Grigorii V. Smirnov-Pinchukov, A. Moór, D. Semenov, P. Ábrahám, Thomas Henning , et al. · 2021

The nature of the gas in CO-rich debris discs remains poorly understood, as it could either be a remnant from the earlier Class II phase or of secondary origin, driven by the destruction of icy planetesimals. The aim of this paper was to e…

Revealing asymmetrical dust distribution in the inner regions of HD 141569 Open

Garima Singh, T. Bhowmik, A. Boccaletti, P. Thébault, Quentin Kral , et al. · 2021

We obtained polarimetric differential imaging of a gas-rich debris disk around HD 141569A with SPHERE in the H-band to compare the scattering properties of the innermost ring at 44 au with former observations in total intensity with the sa…

Impact of size-dependent grain temperature on gas-grain chemistry in protoplanetary disks: The case of low-mass star disks Open

Sacha Gavino, A. Dutrey, Valentine Wakelam, S. Guilloteau, J. Kobus , et al. · 2021

Context. Grain surface chemistry is fundamental to the composition of protoplanetary disks around young stars. Aims. The temperature of grains depends on their size. We evaluate the impact of this temperature dependence on the disk chemist…

Revealing asymmetrical dust distribution in the inner regions of HD 141569 Open

Garima Singh, T. Bhowmik, A. Boccaletti, P. Thébault, Quentin Kral , et al. · 2021

Context. The combination of high-contrast imaging with spectroscopy and polarimetry offers a pathway to studying the grain distribution and properties of debris disks in exquisite detail. Here, we focus on the case of a gas-rich debris dis…

Imaging the inner regions of debris disks with near-infrared interferometry Open

Denis Defrère, Olivier Absil, J.‐C. Augereau, E. Di Folco, V. Coudé du Foresto , et al. · 2021

Most debris disks resolved so far show extended structures located at tens to hundreds AU from the host star, and are more analogous to our solar system's dusty Kuiper belt than to the AU-scale zodiacal disk inside our solar system's aster…

The connection between inner and outer debris disks probed by infrared interferometry Open

Olivier Absil, Denis Defrère, B. Mollier, E. Di Folco, J.‐C. Augereau , et al. · 2021

The far-infrared surveys of nearby main sequence stars performed since the launch of IRAS have shown that a significant fraction of main sequence stars are surrounded by cold dust populations. These surveys are now culminating with the the…

Possible evidence of ongoing planet formation in AB Aurigae. A showcase of the SPHERE/ALMA synergy Open

A. Boccaletti, E. Di Folco, E. Pantin, A. Dutrey, S. Guilloteau , et al. · 2020

Context. Planet formation is expected to take place in the first million years of a planetary system through various processes, which remain to be tested through observations. Aims. With the recent discovery, using ALMA, of two gaseous spi…

The Big Sibling of AU Mic: A Cold Dust-rich Debris Disk around CP−72 2713 in the β Pic Moving Group Open

A. Moór, Nicole Pawellek, P. Ábrahám, Á. Kóspál, K. Vida , et al. · 2020

Analyzing Spitzer and Herschel archival measurements we identified a debris disk around the young K7/M0 star CP−72 2713. The system belongs to the 24 Myr old β Pic moving group. Our new 1.33 mm continuum observation, obtained with the Atac…

Possible evidence of ongoing planet formation in AB Aurigae Open

A. Boccaletti, E. Di Folco, E. Pantin, A. Dutrey, S. Guilloteau , et al. · 2020

Context. Planet formation is expected to take place in the first million years of a planetary system through various processes, which remain to be tested through observations. Aims. With the recent discovery, using ALMA, of two gaseous spi…

Planet-induced spirals in the circumbinary disk of GG Tauri A Open

Nguyễn Thị Phương, A. Dutrey, E. Di Folco, S. Guilloteau, A. Pierens , et al. · 2020

Context. ALMA high angular resolution observations of the dust and CO emission have already revealed signatures of protoplanets embedded in protoplanetary disks. These detections are around single T Tauri stars, while exoplanet surveys rev…

An ALMA/NOEMA study of gas dissipation and dust evolution in the 5 Myr-old HD 141569A hybrid disc Open

E. Di Folco, J. Péricaud, A. Dutrey, J.‐C. Augereau, E. Chapillon , et al. · 2019

Context. The study of gas-rich debris discs is fundamental to characterising the transition between protoplanetary discs and debris discs. Aims. We determine the physical parameters of the brightest gas-rich debris disc orbiting HD 141569A…

Masses and Implications for Ages of Low-mass Pre-main-sequence Stars in Taurus and Ophiuchus Open

M. Simon, S. Guilloteau, Tracy L. Beck, E. Chapillon, E. Di Folco , et al. · 2019

The accuracy of masses of pre-main sequence (PMS) stars derived from their\nlocations on the Hertzsprung-Russell Diagram (HRD) can be tested by comparison\nwith accurate and precise masses determined independently. We present 29 single\nst…

The Flying Saucer: Tomography of the thermal and density gas structure of an edge-on protoplanetary disk Open

A. Dutrey, S. Guilloteau, V. Piétu, E. Chapillon, Valentine Wakelam , et al. · 2017

Context. Determining the gas density and temperature structures of protoplanetary disks is a fundamental task in order to constrain planet formation theories. This is a challenging procedure and most determinations are based on model-depen…

Dynamical Masses of Low-mass Stars in the Taurus and Ophiuchus Star-forming Regions Open

M. Simon, S. Guilloteau, E. Di Folco, A. Dutrey, N. Grosso , et al. · 2017

We report new dynamical masses for five pre-main sequence (PMS) stars in the L1495 region of the Taurus star-forming region (SFR) and six in the L1688 region of the Ophiuchus SFR. Since these regions have VLBA parallaxes, these are absolut…

Planet Formation in AB Aurigae: Imaging of the Inner Gaseous Spirals Observed inside the Dust Cavity Open

Ya‐Wen Tang, S. Guilloteau, A. Dutrey, Takayuki Muto, Bo-Ting Shen , et al. · 2017

We report the results of ALMA observations of a protoplanetary disk surrounding the Herbig Ae star AB Aurigae. We obtained high-resolution (0.″1; 14 au) images in 12 CO J = 2 − 1 emission and in the dust continuum at the wavelength of 1.3 …

The hybrid disks: a search and study to better understand evolution of disks Open

J. Péricaud, E. Di Folco, A. Dutrey, S. Guilloteau, V. Piétu · 2016

Context. The increased sensitivity of millimeter-wave facilities now makes possible the detection of low amounts of gas in debris disks. Some of the gas-rich debris disks harbor peculiar properties, with possible pristine gas and secondary…

Chemistry in disks Open

S. Guilloteau, L. Reboussin, A. Dutrey, E. Chapillon, Valentine Wakelam , et al. · 2016

Aims: We attempt to determine the molecular composition of disks around young low-mass stars. Methods: We used the IRAM 30 m radio telescope to perform a sensitive wideband survey of 30 stars in the Taurus Auriga region known to be surro…

Discovery of concentric broken rings at sub-arcsec separations in the HD 141569A gas-rich, debris disk with VLT/SPHERE Open

C. Perrot, A. Boccaletti, E. Pantin, J.‐C. Augereau, A.-M. Lagrange , et al. · 2016

Observations with SPHERE of HD141569A revealed a series of concentric ringlets located at 116-46AU and matching the formerly detected extended emission in the mid-IR and visible, although finer details are detected here. The brightest ring…

MAPPING CO GAS IN THE GG TAURI A TRIPLE SYSTEM WITH 50 au SPATIAL RESOLUTION Open

Ya‐Wen Tang, A. Dutrey, S. Guilloteau, Edwige Chapillon, Vincent Piétu , et al. · 2016

We aim to unveil the observational imprint of physical mechanisms that govern planetary formation in the young, multiple system GG Tau A. We present ALMA observations of 12 CO and 13 CO 3–2 and 0.9 mm continuum emission with 0.″35 resoluti…

The shadow of the Flying Saucer: A very low temperature for large dust grains Open

S. Guilloteau, V. Piétu, E. Chapillon, E. Di Folco, A. Dutrey , et al. · 2015

Dust determines the temperature structure of protoplanetary disks. However,\ndust temperature determinations almost invariably rely on a complex modeling of\nthe Spectral Energy Distribution. We attempt a direct determination of the\ntempe…

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