exoALMA. XVII. Characterizing the Gas Dynamics around Dust Asymmetries
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| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2025
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| author | Wölfer, Lisa Barraza-Alfaro, Marcelo Teague, Richard Curone, Pietro Benisty, Myriam Fukagawa, Misato Bae, Jaehan Cataldi, Gianni Czekala, Ian Facchini, Stefano Fasano, Daniele Flock, Mario Galloway-Sprietsma, Maria Garg, Himanshi Hall, Cassandra Huang, Jane Ilee, John D. Izquierdo, Andrés F. Kanagawa, Kazuhiro Lesur, Geoffroy Longarini, Cristiano Loomis, Ryan A. Menard, Francois Nath, Anika Orihara, Ryuta Pinte, Christophe Price, Daniel J. Rosotti, Giovanni Stadler, Jochen Wafflard-Fernandez, Gaylor Winter, Andrew J. Yen, Hsi-Wei Yoshida, Tomohiro C. Zawadzki, Brianna |
| author_facet | Wölfer, Lisa Barraza-Alfaro, Marcelo Teague, Richard Curone, Pietro Benisty, Myriam Fukagawa, Misato Bae, Jaehan Cataldi, Gianni Czekala, Ian Facchini, Stefano Fasano, Daniele Flock, Mario Galloway-Sprietsma, Maria Garg, Himanshi Hall, Cassandra Huang, Jane Ilee, John D. Izquierdo, Andrés F. Kanagawa, Kazuhiro Lesur, Geoffroy Longarini, Cristiano Loomis, Ryan A. Menard, Francois Nath, Anika Orihara, Ryuta Pinte, Christophe Price, Daniel J. Rosotti, Giovanni Stadler, Jochen Wafflard-Fernandez, Gaylor Winter, Andrew J. Yen, Hsi-Wei Yoshida, Tomohiro C. Zawadzki, Brianna |
| contents | The key planet-formation processes in protoplanetary disks remain an active matter of research. One promising mechanism to radially and azimuthally trap millimeter-emitting dust grains, enabling them to concentrate and grow into planetesimals, is anticyclonic vortices. While dust observations have revealed crescent structures in several disks, observations of their kinematic signatures are still lacking. Studying the gas dynamics is, however, essential to confirm the presence of a vortex and understand its dust trapping properties. In this work, we make use of the high-resolution and sensitivity observations conducted by the exoALMA large program to search for such signatures in the $^{12}$CO and $^{13}$CO molecular line emission of four disks with azimuthal dust asymmetries: HD 135344B, HD 143006, HD 34282, and MWC 758. To assess the vortex features, we constructed an analytical vortex model and performed hydrodynamical simulations. For the latter, we assumed two scenarios: a vortex triggered at the edge of a dead zone and of a gap created by a massive embedded planet. These models reveal a complex kinematical morphology of the vortex. When compared to the data, we find that none of the sources show a distinctive vortex signature around the dust crescents in the kinematics. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_20023 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | exoALMA. XVII. Characterizing the Gas Dynamics around Dust Asymmetries Wölfer, Lisa Barraza-Alfaro, Marcelo Teague, Richard Curone, Pietro Benisty, Myriam Fukagawa, Misato Bae, Jaehan Cataldi, Gianni Czekala, Ian Facchini, Stefano Fasano, Daniele Flock, Mario Galloway-Sprietsma, Maria Garg, Himanshi Hall, Cassandra Huang, Jane Ilee, John D. Izquierdo, Andrés F. Kanagawa, Kazuhiro Lesur, Geoffroy Longarini, Cristiano Loomis, Ryan A. Menard, Francois Nath, Anika Orihara, Ryuta Pinte, Christophe Price, Daniel J. Rosotti, Giovanni Stadler, Jochen Wafflard-Fernandez, Gaylor Winter, Andrew J. Yen, Hsi-Wei Yoshida, Tomohiro C. Zawadzki, Brianna Earth and Planetary Astrophysics Solar and Stellar Astrophysics The key planet-formation processes in protoplanetary disks remain an active matter of research. One promising mechanism to radially and azimuthally trap millimeter-emitting dust grains, enabling them to concentrate and grow into planetesimals, is anticyclonic vortices. While dust observations have revealed crescent structures in several disks, observations of their kinematic signatures are still lacking. Studying the gas dynamics is, however, essential to confirm the presence of a vortex and understand its dust trapping properties. In this work, we make use of the high-resolution and sensitivity observations conducted by the exoALMA large program to search for such signatures in the $^{12}$CO and $^{13}$CO molecular line emission of four disks with azimuthal dust asymmetries: HD 135344B, HD 143006, HD 34282, and MWC 758. To assess the vortex features, we constructed an analytical vortex model and performed hydrodynamical simulations. For the latter, we assumed two scenarios: a vortex triggered at the edge of a dead zone and of a gap created by a massive embedded planet. These models reveal a complex kinematical morphology of the vortex. When compared to the data, we find that none of the sources show a distinctive vortex signature around the dust crescents in the kinematics. |
| title | exoALMA. XVII. Characterizing the Gas Dynamics around Dust Asymmetries |
| topic | Earth and Planetary Astrophysics Solar and Stellar Astrophysics |
| url | https://arxiv.org/abs/2504.20023 |