Article
Astronomy & Astrophysics
Jun Hashimoto, Takayuki Muto, Ruobing Dong, Hauyu Baobab Liu, Nienke van der Marel, Logan Francis, Yasuhiro Hasegawa, Takashi Tsukagoshi
Summary: In this study, the dust disk around DM Tau was analyzed using ALMA observations, revealing two asymmetries that could be related to early evolution. Additionally, millimeter emissions were found inside the ring, suggesting the possibility of forming small icy planets in the region.
ASTROPHYSICAL JOURNAL
(2021)
Article
Astronomy & Astrophysics
Elishevah van Kooten, Martin Schiller, Frederic Moynier, Anders Johansen, Troels Haugbolle, Martin Bizzarro
Summary: This study investigates the origin and accretion pathways of chondritic components, revealing the heritage of pristine components and the onion-shell structure of chondrules. The findings suggest that Earth acquired CI-like dust through the mechanism of massive outward chondrule transport past the Jupiter barrier, demonstrating the limited capacity of Jupiter to maintain the noncarbonaceous and carbonaceous chondrite dichotomy over time. The study also explores inner and outer solar system origins for the CV chondrite parent body, considering current astrophysical models.
ASTROPHYSICAL JOURNAL
(2021)
Article
Astronomy & Astrophysics
Shijie Wang, Kazuhiro D. Kanagawa, Yasushi Suto
Summary: Recent ALMA observations have identified various dust gaps in protoplanetary disks, with predictions of embedded planet masses depending on gap structures in both the dust and gas components. The study found that outer gaps are mostly dust alone, while inner gaps are more likely to be associated with a gas gap as well, indicating significant inward migration is required in the evolution of these embedded planets, which differs from observed planetary system architectures.
ASTROPHYSICAL JOURNAL
(2021)
Article
Astronomy & Astrophysics
A. J. Bohn, M. Benisty, K. Perraut, N. van der Marel, L. Wolfer, E. F. van Dishoeck, S. Facchini, C. F. Manara, R. Teague, L. Francis, J-P Berger, R. Garcia-Lopez, C. Ginski, T. Henning, M. Kenworthy, S. Kraus, F. Menard, A. Merand, L. M. Perez
Summary: This study investigates the presence of misalignments in transition disks by using near infrared and submillimeter interferometric observations. The analysis reveals six disks to exhibit significant misalignments, which are consistent with the predicted shadow positions in scattered light images.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
S. E. van Terwisga, A. Hacar
Summary: External far-ultraviolet (FUV) irradiation has a significant impact on the evolution of protoplanetary disks. This study used a large sample from the SODA survey to investigate the effects of intermediate FUV radiation fields in L1641 and L1647. The results show that the median disk mass in the most irradiated disks decreases by a factor of 2, and the 95th percentile of disk masses decreases by a factor of 4 over a range of radiation fields from 1 to 100G(0). This effect is present in multiple populations of stars and localized within 2pc of ionizing stars. An empirical irradiation-disk mass relation is derived for the first time.
ASTRONOMY & ASTROPHYSICS
(2023)
Article
Astronomy & Astrophysics
S. Charnoz, G. Avice, R. Hyodo, F. C. Pignatale, M. Chaussidon
Summary: This paper investigates the conditions for the formation of pressure maxima in stratified disks, confirming that the release of water vapor leads to the formation of pressure bumps. This mechanism shows promise for isolating different isotopic reservoirs in the Solar System and promoting planetesimal formation inward of the snow line.
ASTRONOMY & ASTROPHYSICS
(2021)
Article
Astronomy & Astrophysics
Dana E. Anderson, Geoffrey A. Blake, L. Ilsedore Cleeves, Edwin A. Bergin, Ke Zhang, Kamber R. Schwarz, Colette Salyk, Arthur D. Bosman
Summary: Infrared observations of warm gas in planet-forming disks around young Sun-like T Tauri stars have revealed various observable molecules, with CH4 being largely unconstrained. The James Webb Space Telescope (JWST) is expected to provide more insights into the composition of these disks. Our modeling of a T Tauri disk suggests that the inner disk surface layers experience photon-driven chemistry that significantly alters the initial carbon and oxygen carriers, leading to steady-state surface compositions regardless of initial abundances. The study also highlights the preservation of initial disk compositions in the shielded inner disk midplane, and the sensitivity of observable molecule fluxes to changes in disk gas temperature, inner radius, and total elemental C/O ratio.
ASTROPHYSICAL JOURNAL
(2021)
Article
Astronomy & Astrophysics
Jenny K. Calahan, Edwin Bergin, Ke Zhang, Richard Teague, Ilsedore Cleeves, Jennifer Bergner, Geoffrey A. Blake, Paolo Cazzoletti, Viviana Guzman, Michiel R. Hogerheijde, Jane Huang, Mihkel Kama, Ryan Loomis, Karin Oberg, Charlie Qi, Ewine F. van Dishoeck, Jeroen Terwisscha van Scheltinga, Catherine Walsh, David Wilner
Summary: The study focuses on constraining the thermal structure of the protoplanetary disk TW Hya using CO line images, finding that CO alone is not a viable mass tracer due to degeneracy with total H-2 surface density. Different mass models can readily match spatially resolved CO line profiles.
ASTROPHYSICAL JOURNAL
(2021)
Article
Astronomy & Astrophysics
Dana E. Anderson, L. Ilsedore Cleeves, Geoffrey A. Blake, Edwin A. Bergin, Ke Zhang, John M. Carpenter, Kamber R. Schwarz
Summary: Gas mass is a fundamental quantity for protoplanetary disks' ability to form planets. The current estimates for gas masses in the Lupus star-forming region are based on CO isotopologues, but the uncertainties are large due to the degeneracy between H-2 mass and gas composition. This study explores the gas compositions of seven disks from the Lupus sample and finds tentative correlations among the line fluxes of HCO+, HCN, and N2H+. It highlights the importance of multimolecular studies in determining the physical and chemical properties of gas in protoplanetary disks.
ASTROPHYSICAL JOURNAL
(2022)
Article
Astronomy & Astrophysics
Seokho Lee, Hideko Nomura, Kenji Furuya, Jeong-Eun Lee
Summary: Observations of the protoplanetary disk around TW Hya show nitrogen fractionation of HCN molecules, with a ratio increasing outwards, potentially due to differences in small dust grain distribution between outer and inner disk regions. The developed disk model successfully reproduces these observations by incorporating isotope-selective photodissociation of N-2 and isotope-exchange chemical reactions.
ASTROPHYSICAL JOURNAL
(2021)
Article
Astronomy & Astrophysics
C. P. Dullemond, A. Ziampras, D. Ostertag, C. Dominik
Summary: Through hydrodynamic simulations of protoplanetary disks, it has been determined that disks with geometrically thin midplane dust layers cannot have vertical shear instability (VSI). These findings are significant for understanding dust growth and disk evolution processes.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
Nienke van Der Marel, Alice S. Booth, Margot Leemker, Ewine F. van Dishoeck, Satoshi Ohashi
Summary: This study investigates the chemistry in the asymmetric Oph IRS 48 dust trap, showing the origins of H2CO and CH3OH molecules in warm molecular regions of the disk with temperatures > 100 K and H2CO/CH3OH ~ 0.2, indicative of ice chemistry. The results highlight the importance of dust traps as reservoirs for complex organic molecules in planet-forming disks.
ASTRONOMY & ASTROPHYSICS
(2021)
Article
Astronomy & Astrophysics
T. Paneque-Carreno, A. Miotello, E. F. van Dishoeck, B. Tabone, A. F. Izquierdo, S. Facchini
Summary: This study aims to directly trace the vertical location of multiple molecular tracers in protoplanetary disks to study the environment of planet formation. The distribution of CO isotopologues is found to be in agreement with theoretical predictions, while the distribution of other molecules does not fully match the theoretical predictions, requiring further research and understanding.
ASTRONOMY & ASTROPHYSICS
(2023)
Article
Astronomy & Astrophysics
A. Garufi, L. Podio, C. Codella, D. Segura-Cox, M. Vander Donckt, S. Mercimek, F. Bacciotti, D. Fedele, M. Kasper, J. E. Pineda, E. Humphreys, L. Testi
Summary: Planet-forming disks interact with the surrounding medium, affecting their mass and chemical content. This study reveals that the emission of SO and SO2 originates at the intersection between extended streamers and the planet-forming disk, and late accreting material can induce shocks in the disk that have consequences for its chemical composition and mass content. The observations of SO and SO2 lines play an important role in probing accretion shocks.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
L. Bertini, V. Roccatagliata, M. Kim
Summary: This study shows that in the past 5 million years, 90% of the debris disk systems have experienced at least one close flyby event, indicating the significant impact of flybys on the evolution of debris disks. Furthermore, the observed flyby events in resolved systems are consistent with theoretical predictions.
ASTRONOMY & ASTROPHYSICS
(2023)
Article
Astronomy & Astrophysics
Arnaud Vericel, Jean-Francois Gonzalez
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2020)
Article
Astronomy & Astrophysics
Anthony J. L. Garcia, Jean-Francois Gonzalez
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2020)
Article
Astronomy & Astrophysics
Jean-Francois Gonzalez, Gerrit van der Plas, Christophe Pinte, Nicolas Cuello, Rebecca Nealon, Francois Menard, Alexandre Revol, Laetitia Rodet, Maud Langlois, Anne-Lise Maire
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2020)
Article
Astronomy & Astrophysics
Brodie J. Norfolk, Sarah T. Maddison, Christophe Pinte, Nienke van der Marel, Richard A. Booth, Logan Francis, Jean-Francois Gonzalez, Francois Menard, Chris M. Wright, Gerrit van der Plas, Himanshi Garg
Summary: The origin of inner dust cavities in transition discs remains unclear, with differences expected based on the clearing mechanism. Observations with ATCA and ALMA show that the brightness distributions of 8.8mm and sub-mm dust grains in transition discs peak at the same radius, suggesting a common cavity size possibly induced by a dust trap.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
Y. Boehler, F. Menard, C. M. T. Robert, A. Isella, C. Pinte, J-F Gonzalez, G. van der Plas, E. Weaver, R. Teague, H. Garg, H. Meheut
Summary: In this study, using a vortex model and multiple transition lines, kinematic deviations and azimuthal-to-radial aspect ratio were detected in the outer disk of the binary system HD 142527, suggesting the presence of horseshoe structures and spirals. Two possible explanations, vortex signals and beam smearing, are difficult to differentiate at present, requiring higher spatial resolution observations for clarification.
ASTRONOMY & ASTROPHYSICS
(2021)
Article
Astronomy & Astrophysics
Brodie J. Norfolk, Sarah T. Maddison, Jonathan P. Marshall, Grant M. Kennedy, Gaspard Duchene, David J. Wilner, Christophe Pinte, Attila Moor, Brenda Matthews, Peter Abraham, Agnes Kospal, Nienke van der Marel
Summary: Millimetre continuum observations of debris discs can provide insights into the physical and dynamical properties of unseen planetesimals, with the derived grain size distribution parameter being consistent with collisional cascade models. The sample combined with other millimetre-wavelength-detected debris discs suggests the possibility of two distributions of q, and an observational bias between grain size distribution parameter and absolute flux.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
Arnaud Vericel, Jean-Francois Gonzalez, Daniel J. Price, Guillaume Laibe, Christophe Pinte
Summary: This paper introduces the implementation of a dust growth and fragmentation module in the public SPH code phantom, showcasing its importance in circumstellar disc simulations. The module, interfaced with the radiative transfer code mcfost, allows for synthetic map generation and comparison with ALMA observations. The simulations reproduce a mechanism known as the 'self-induced dust trap' and suggest detectable features by ALMA in discs with this mechanism.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Orthopedics
Matthieu Ehlinger, Jean-Claude Panisset, David Dejour, Jean-Francois Gonzalez, Regis Paihle, Henri Favreau, Matthieu Ollivier, Sebastien Lustig
Summary: This study compared the results of surgical versus non-surgical treatment of ACL tear in patients over 50 years old, and found that surgical treatment had better outcomes. Severe laxity at diagnosis indicates a preference for surgical treatment.
ORTHOPAEDICS & TRAUMATOLOGY-SURGERY & RESEARCH
(2021)
Article
Astronomy & Astrophysics
Hossam Aly, Jean-Francois Gonzalez, Rebecca Nealon, Cristiano Longarini, Giuseppe Lodato, Daniel J. Price
Summary: Gas and dust in inclined orbits around binaries experience precession induced by binary gravitational torque, leading to density enhancements called "dust traffic jams" where weakly coupled dust alters radial drift. These traffic jams exist at different disc inclinations and binary eccentricities, providing significant dust density enhancements and playing a crucial role in the evolution of dust disc angular momentum.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
Brodie J. Norfolk, Christophe Pinte, Josh Calcino, Iain Hammond, Nienke van der Marel, Daniel J. Price, Sarah T. Maddison, Valentin Christiaens, Jean-Francois Gonzalez, Dori Blakely, Giovanni Rosotti, Christian Ginski
Summary: We present a new interpretation of SPHERE polarized observations that reveal an inner spiral in the disk of HD 100546, which is likely generated by an inner companion inside the disk cavity. This interpretation is supported by the previously reported CO emission Doppler flip.
ASTROPHYSICAL JOURNAL LETTERS
(2022)
Article
Astronomy & Astrophysics
Stephane Michoulier, Jean-Francois Gonzalez
Summary: The coagulation of dust grains into larger aggregates in protoplanetary discs is not well understood. This study investigates the growth and porosity evolution of grains as they drift in a disc model. The results show that rotational disruption is an important process in addition to collisional fragmentation, and its importance depends on the grains' tensile strength.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Armand Leclerc, Guillaume Laibe, Pierre Delplace, Antoine Venaille, Nicolas Perez
Summary: Stellar oscillations can have topological properties, as revealed by establishing a novel parallel between stars and topological insulators. The changes in the acoustic-buoyant frequency are connected to the existence of topological modes within stars, which cross the frequency gap and exhibit different behaviors at low and high harmonic degree.
ASTROPHYSICAL JOURNAL
(2022)
Article
Astronomy & Astrophysics
Chen Xie, Bin B. Ren, Ruobing Dong, Elodie Choquet, Arthur Vigan, Jean-Francois Gonzalez, Kevin Wagner, Taotao Fang, Maria Giulia Ubeira-Gabellini
Summary: This study reports the first observational evidence of a companion driving a spiral arm among protoplanetary disks, confirming the long-standing theory on the origin of spiral features. The research suggests a feasible way of searching for hidden spiral-arm-driving planets that are beyond the detection of existing ground-based high-contrast imagers.
ASTRONOMY & ASTROPHYSICS
(2023)