Article
Astronomy & Astrophysics
M. Villenave, F. Menard, W. R. F. Dent, M. Benisty, G. van der Plas, J. P. Williams, M. Ansdell, A. Ribas, C. Caceres, H. Canovas, L. Cieza, A. Hales, I. Kamp, C. Pinte, D. A. Principe, M. R. Schreiber
Summary: The study compares the dust masses of protoplanetary disks in the Chamaeleon II star-forming region with other regions aged between 1 and 10 million years. Results show that most disk dust masses in Cha II are lower than 10 Earth masses and there are no significant differences in dust mass distributions compared to other regions.
ASTRONOMY & ASTROPHYSICS
(2021)
Article
Astronomy & Astrophysics
K. Lange, C. Dominik, A. G. G. M. Tielens
Summary: This study investigates the reduction of polycyclic aromatic hydrocarbons (PAHs) in protoplanetary discs through clustering and adsorption on dust grains. The research finds that once PAHs are frozen on the dust grain surface, the high heat capacity of these clusters prevents them from evaporating off in UV-rich environments, leading to the depletion of gas-phase PAHs in the discs.
ASTRONOMY & ASTROPHYSICS
(2023)
Article
Astronomy & Astrophysics
K. Lange, C. Dominik, A. G. G. M. Tielens
Summary: The study investigates the formation and survival of PAH clusters in protoplanetary discs around Herbig Ae/Be and T Tauri stars, showing that PAH dimers can form in the inner 100 AU of these discs and may grow beyond dimer size in a short time. While PAH clusters may not survive in the photosphere of Herbig stars due to high UV radiation, they are possible in T Tauri discs, suggesting cluster formation as a potential explanation for low PAH detection rates in these systems.
ASTRONOMY & ASTROPHYSICS
(2021)
Article
Astronomy & Astrophysics
P-G Valegard, L. B. F. M. Waters, C. Dominik
Summary: By studying the circumstellar disks around intermediate-mass Herbig Ae/Be stars, researchers have gained insights into the formation and evolution of these disks. The similarities between Herbig Ae/Be stars and intermediate-mass T Tauri (IMTT) stars suggest two different evolutionary paths for Group I and Group II disks.
ASTRONOMY & ASTROPHYSICS
(2021)
Article
Astronomy & Astrophysics
P. Marcos-Arenal, I Mendigutia, E. Koumpia, R. D. Oudmaijer, M. Vioque, J. Guzman-Diaz, C. Wichittanakom, W. J. de Wit, B. Montesinos, J. D. Ilee
Summary: This study aimed to test whether the positioning of HAeBes stars is related to factors such as the presence of inner gas, disk-to-star accretion mechanism, and spectral energy distribution properties. The results showed no general trend linking these factors to the location of HAeBes stars in the size-luminosity diagram.
ASTRONOMY & ASTROPHYSICS
(2021)
Article
Astronomy & Astrophysics
Nour Ibrahim, John D. Monnier, Stefan Kraus, Jean-Baptiste Le Bouquin, Narsireddy Anugu, Fabien Baron, Theo Ten Brummelaar, Claire L. Davies, Jacob Ennis, Tyler Gardner, Aaron Labdon, Cyprien Lanthermann, Antoine Merand, Evan Rich, Gail H. Schaefer, Benjamin R. Setterholm
Summary: The inner regions of protoplanetary disks in stars present challenges for observation due to their small size. In this study, infrared interferometers were used to image the inner regions of the protoplanetary disk in the young and luminous Herbig Be star HD 190073. A sub-AU cavity and a ring-like structure were detected, and various models were proposed to explain the observed features. These findings provide insights into the structure and dynamics of protoplanetary disks.
ASTROPHYSICAL JOURNAL
(2023)
Article
Astronomy & Astrophysics
G. Bourdarot, J. -P. Berger, G. Lesur, K. Perraut, F. Malbet, R. Millan-Gabet, J. -B. Le Bouquin, R. Garcia-Lopez, J. D. Monnier, A. Labdon, S. Kraus, L. Labadie, A. Aarnio
Summary: This study uses near-infrared interferometry to directly observe the size and temporal evolution of the outburst region of FU Orionis, in order to constrain the instability mechanism and compare it with physical models. The results show that the size of the outburst region changes slightly over time, consistent with 1D magnetohydrodynamic simulations. The scenario of magnetorotational instability (MRI) triggered by gravitational instability (GI) in a magnetically layered disk is favored as the most likely explanation.
ASTRONOMY & ASTROPHYSICS
(2023)
Article
Astronomy & Astrophysics
Aaron Labdon, Stefan Kraus, Claire L. Davies, Alexander Kreplin, Sebastian Zarrilli, John D. Monnier, Jean-Baptiste Le Bouquin, Narsireddy Anugu, Benjamin Setterholm, Tyler Gardner, Jacob Ennis, Cyprien Lanthermann, Theo ten Brummelaar, Gail Schaefer, Tim J. Harries
Summary: In this article, we present state-of-the-art interferometric observations of the circumstellar material around the widely studied T Tauri star SU Aurigae. We aim to investigate its characteristics and constrain the disk's geometry, composition, and inner dust rim structure.
ASTRONOMY & ASTROPHYSICS
(2023)
Article
Astronomy & Astrophysics
A. P. Sousa, J. Bouvier, S. H. P. Alencar, J. -F. Donati, E. Alecian, J. Roquette, K. Perraut, C. Dougados, A. Carmona, S. Covino, D. Fugazza, E. Molinari, C. Moutou, A. Santerne, K. Grankin, E. Artigau, X. Delfosse, G. Hebrard
Summary: The study focused on the dynamics of the young stellar system V2129 Oph, and found that the variations in optical and infrared line profiles are consistent with a magnetospheric accretion scenario.
ASTRONOMY & ASTROPHYSICS
(2021)
Article
Astronomy & Astrophysics
C. F. Manara, A. Frasca, L. Venuti, M. Siwak, G. J. Herczeg, N. Calvet, J. Hernandez, L. Tychoniec, M. Gangi, J. M. Alcala, H. M. J. Boffin, B. Nisini, M. Robberto, C. Briceno, J. Campbell-White, A. Sicilia-Aguilar, P. McGinnis, D. Fedele, A. Kospal, P. Abraham, J. Alonso-Santiago, S. Antoniucci, N. Arulanantham, F. Bacciotti, A. Banzatti, G. Beccari, M. Benisty, K. Biazzo, J. Bouvier, S. Cabrit, A. Caratti O. Garatti, D. Coffey, E. Covino, C. Dougados, J. Eisloffel, B. Ercolano, C. C. Espaillat, J. Erkal, S. Facchini, M. Fang, E. Fiorellino, W. J. Fischer, K. France, J. F. Gameiro, R. Garcia Lopez, T. Giannini, C. Ginski, K. Grankin, H. M. Gunther, L. Hartmann, L. A. Hillenbrand, G. A. J. Hussain, M. M. James, M. Koutoulaki, G. Lodato, K. Mauco, I Mendigutia, R. Mentel, A. Miotello, R. D. Oudmaijer, E. Rigliaco, G. P. Rosotti, E. Sanchis, P. C. Schneider, L. Spina, B. Stelzer, L. Testi, T. Thanathibodee, J. S. Vink, F. M. Walter, J. P. Williams, G. Zsidi
Summary: The evolution of young stars and disks is driven by processes such as accretion and ejection, which are best probed spectroscopically using instruments like the Hubble Space Telescope and the ESO Very Large Telescope. Studies on regions like the Orion OB1 association and the -Orionis cluster have shown similarities in accretion rates with other young star-forming regions. The combination of data from ULLYSES and PENELLOPE will play a key role in understanding the mechanisms of accretion and ejection in young stars.
ASTRONOMY & ASTROPHYSICS
(2021)
Article
Astronomy & Astrophysics
J. Guzman-Diaz, B. Montesinos, I. Mendigutia, M. Kama, G. Meeus, M. Vioque, R. D. Oudmaijer, E. Villaver
Summary: Most studies on Herbig Ae/Be stars (HAeBes) assume solar metallicity. However, the stellar metallicity [M/H] can vary significantly depending on the source, which may have implications for planet formation. This study aims to test the hypothesis that the deficit of refractory elements in some HAeBes' surfaces is linked to the presence of cavities in their disks caused by Jovian planets.
ASTRONOMY & ASTROPHYSICS
(2023)
Article
Astronomy & Astrophysics
A. A. Rota, C. F. Manara, A. Miotello, G. Lodato, S. Facchini, M. Koutoulaki, G. Herczeg, F. Long, M. Tazzari, S. Cabrit, D. Harsono, F. Menard, P. Pinilla, G. van der Plas, E. Ragusa, H. -W. Yen
Summary: In this study, ALMA observations of multiple stellar systems reveal that the gas disc size is on average 4.2 times larger than the dust disc size, and that the outer dusty disc in multiple stellar systems is sharply truncated. These findings are consistent with tidal truncation models in multiple stellar systems.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
Takahiro Ueda, Luca Ricci, Mario Flock, Zachary Castro
Summary: This study investigates the capabilities of ALMA and ngVLA in observing the dust concentration at the inner edge of the dead zone in protoplanetary disks. The findings show that ngVLA can detect the dust concentration with its unprecedented angular resolution and sensitivity, while ALMA cannot resolve its spatial distribution.
ASTROPHYSICAL JOURNAL
(2022)
Review
Astronomy & Astrophysics
Sean D. D. Brittain, Inga Kamp, Gwendolyn Meeus, Rene D. Oudmaijer, L. B. F. M. Waters
Summary: Herbig Ae/Be stars are young contracting stars on their way to the main sequence, providing a valuable link between high and low mass stars. This review discusses the progress made in understanding these fascinating objects and their disks since 1998. Topics covered include stellar properties, accretion of circumstellar material, dust and gas properties of the circumstellar disk, evidence for planet formation, and future prospects.
SPACE SCIENCE REVIEWS
(2023)
Article
Astronomy & Astrophysics
J. M. Alcala, M. Gangi, K. Biazzo, S. Antoniucci, A. Frasca, T. Giannini, U. Munari, B. Nisini, A. Harutyunyan, C. F. Manara, F. Vitali
Summary: The study presents a pilot investigation of the stellar and accretion properties of seven YSOs in the Taurus star forming region using high-resolution spectroscopy and contemporaneous low-resolution spectroscopic and photometric observations. By deriving the stellar and accretion properties of the YSOs in a homogeneous and self-consistent way, the research provides insights into the accretion processes and continuum excess emission in the near-infrared.
ASTRONOMY & ASTROPHYSICS
(2021)
Article
Astronomy & Astrophysics
A. Riols, B. Roux, H. Latter, G. Lesur
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2020)
Article
Astronomy & Astrophysics
A. Riols, G. Lesur, F. Menard
ASTRONOMY & ASTROPHYSICS
(2020)
Article
Astronomy & Astrophysics
C. Flores, G. Duchene, S. Wolff, M. Villenave, K. Stapelfeldt, J. P. Williams, C. Pinte, D. Padgett, M. S. Connelley, G. van der Plas, F. Menard, M. D. Perrin
Summary: This study presents high-resolution observations of the protoplanetary disk around SSTC2D J163131.2-242627 using ALMA and spectroscopy techniques. Despite the massive disk, there is little evidence of ongoing accretion onto the star. The temperature structure of the disk is derived, with a significant increase in CO temperature coinciding with a reduction in submillimeter and submicron emissions from the disk.
ASTRONOMICAL JOURNAL
(2021)
Article
Astronomy & Astrophysics
Schuyler G. Wolff, Gaspard Duchene, Karl R. Stapelfeldt, Francois Menard, Christian Flores, Deborah Padgett, Christophe Pinte, Marion Villenave, Gerrit van der Plas, Marshall D. Perrin
Summary: Researchers studied a young solar-type star and its protoplanetary disk using Hubble Space Telescope, Keck Telescope, and Atacama Large Millimeter/submillimeter Array. By analyzing images of different wavelengths, they revealed the geometry and dust properties of the disk and discovered unexpected phenomena.
ASTRONOMICAL JOURNAL
(2021)
Article
Astronomy & Astrophysics
R. Asensio-Torres, Th Henning, F. Cantalloube, P. Pinilla, D. Mesa, A. Garufi, S. Jorquera, R. Gratton, G. Chauvin, J. Szulagyi, R. van Boekel, R. Dong, G-D Marleau, M. Benisty, M. Villenave, C. Bergez-Casalou, C. Desgrange, M. Janson, M. Keppler, M. Langlois, F. Menard, E. Rickman, T. Stolker, M. Feldt, T. Fusco, L. Gluck, A. Pavlov, J. Ramos
Summary: High spatial resolution imaging has revealed a wide range of substructures in protoplanetary disks, with speculations of planetary-mass companions causing these features. However, the only confirmed detection so far has been two giant planets in the disk around PDS 70. By using SPHERE scattered-light images, we identified substructures in 15 protoplanetary disks and derived planet detection limits. Our study suggests that more massive perturbers are needed to create gaps within cavities compared to rings, and certain disks like PDS 66 and HD 97048 are promising for planet searches.
ASTRONOMY & ASTROPHYSICS
(2021)
Article
Astronomy & Astrophysics
M. Villenave, F. Menard, W. R. F. Dent, M. Benisty, G. van der Plas, J. P. Williams, M. Ansdell, A. Ribas, C. Caceres, H. Canovas, L. Cieza, A. Hales, I. Kamp, C. Pinte, D. A. Principe, M. R. Schreiber
Summary: The study compares the dust masses of protoplanetary disks in the Chamaeleon II star-forming region with other regions aged between 1 and 10 million years. Results show that most disk dust masses in Cha II are lower than 10 Earth masses and there are no significant differences in dust mass distributions compared to other regions.
ASTRONOMY & ASTROPHYSICS
(2021)
Article
Astronomy & Astrophysics
Enrico Ragusa, Daniele Fasano, Claudia Toci, Gaspard Duchene, Nicolas Cuello, Marion Villenave, Gerrit van der Plas, Giuseppe Lodato, Francois Menard, Daniel J. Price, Christophe Pinte, Karl Stapelfeldt, Schuyler Wolff
Summary: The study focused on the system IRAS 04158+2805, revealing it as a system with a large disc surrounding a binary star and a central dust cavity. By combining multiwavelength observations and measurements of the binary system, a dynamical model was established and simulations were conducted to compare with observations, showing a good match between models and observations.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
A. Riols, W. Xu, G. Lesur, M. W. Kunz, H. Latter
Summary: Research on the interaction between gravitational instability (GI) and magnetic fields in young protoplanetary discs shows that GI can sustain a magnetic field in poorly ionized protostellar discs. The dynamo process in these discs is found to operate effectively in a certain range of ambipolar Elssaser number, primarily driven by differential rotation and large-scale vertical roll motions associated with spiral density waves. The results have implications for understanding the dynamo process in young protoplanetary discs and possibly in some regions of active galactic nucleus discs.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
A. Garufi, C. Dominik, C. Ginski, M. Benisty, R. G. van Holstein, Th Henning, N. Pawellek, C. Pinte, H. Avenhaus, S. Facchini, R. Galicher, R. Gratton, F. Menard, G. Muro-Arena, J. Milli, T. Stolker, A. Vigan, M. Villenave, T. Moulin, A. Origne, F. Rigal, J-F Sauvage, L. Weber
Summary: This study aims to alleviate the bias in disk demography by analyzing 15 dim disks using VLT/SPHERE. The results show that these disks are self-shadowed, with the inner rim intercepting most starlight and leaving the outer disk in penumbra. The study also discusses the potential evolution of the illumination pattern of the outer disk over time.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
M. Villenave, K. R. Stapelfeldt, G. Duchene, F. Menard, M. Lambrechts, A. Sierra, C. Flores, W. R. F. Dent, S. Wolff, A. Ribas, M. Benisty, N. Cuello, C. Pinte
Summary: This study investigates the mechanism of dust concentration in a protoplanetary disk through observations and modeling, finding that the thin dust scale height is favorable for planetary growth by pebble accretion, providing theoretical support for the efficient settling of large grains in the disk.
ASTROPHYSICAL JOURNAL
(2022)
Article
Astronomy & Astrophysics
A. Ribas, E. Macias, P. Weber, S. Perez, N. Cuello, R. Dong, A. Aguayo, C. Caceres, J. Carpenter, W. R. F. Dent, I. de Gregorio-Monsalvo, G. Duchene, C. C. Espaillat, P. Riviere-Marichalar, M. Villenave
Summary: The aim of this study is to characterize the protoplanetary disk around the young solar analog MP Mus (PDS 66) and detect any signs of planet formation. New ALMA observations at different wavelengths reveal the presence of dust and gas in the disk. The main findings include a relatively smooth structure of the disk and a radius of approximately 60 au for the dust disk.
ASTRONOMY & ASTROPHYSICS
(2023)
Article
Astronomy & Astrophysics
M. Villenave, L. Podio, G. Duchene, K. R. Stapelfeldt, C. Melis, C. Carrasco-Gonzalez, V. J. M. Le Gouellec, F. Menard, M. de Simone, C. Chandler, A. Garufi, C. Pinte, E. Bianchi, C. Codella
Summary: We conducted new VLA observations on the Class I disk IRAS04302+2247, detecting thermal emission from the disk at 6.8 mm and 9.2 mm. The radial brightness profile of the disk changes from extended to centrally brightened at these wavelengths, indicating optical depth effects. Our radiative transfer modeling suggests that the grain scale height emitting at millimeter wavelengths is between 1 au and 6 au, while gas scale height is estimated to be about 7 au, indicating moderate settling.
ASTROPHYSICAL JOURNAL
(2023)
Article
Astronomy & Astrophysics
Isabel Angelo, Gaspard Duchene, Karl Stapelfeldt, Zoie Telkamp, Francois Menard, Deborah Padgett, Gerrit van der Plas, Marion Villenave, Christophe Pinte, Schuyler Wolff, William J. Fischer, Marshall D. Perrin
Summary: The structure of protoplanetary disks is important for planet formation. Highly inclined or edge-on disks provide a unique opportunity to study their vertical structure. However, the current selection process for detecting edge-on disks may be biased towards larger, more-massive disks. To investigate this, we used radiative transfer simulations to generate disk models and determined the parameters that produce edge-on systems that can be detected. Our analysis suggests that there may be several undiscovered edge-on disks in nearby star-forming regions.
ASTROPHYSICAL JOURNAL
(2023)