exoALMA. XVIII. Interpreting large scale kinematic structures as moderate warping
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arXiv
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| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2025
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| author | Winter, Andrew J. Benisty, Myriam Izquierdo, Andrés F. Lodato, Giuseppe Teague, Richard Kimmig, Carolin N. Andrews, Sean M. Bae, Jaehan Barraza-Alfaro, Marcelo Cuello, Nicolás Curone, Pietro Czekala, Ian Facchini, Stefano Fasano, Daniele Hall, Cassandra Hardiman, Caitlyn Hilder, Thomas Ilee, John D. Fukagawa, Misato Longarini, Cristiano Ménard, François Orihara, Ryuta Pinte, Christophe Price, Daniel J. Rosotti, Giovanni Stadler, Jochen Wilner, David J. Wölfer, Lisa Yen, Hsi-Wei Yoshida, Tomohiro C. Zawadzki, Brianna |
| author_facet | Winter, Andrew J. Benisty, Myriam Izquierdo, Andrés F. Lodato, Giuseppe Teague, Richard Kimmig, Carolin N. Andrews, Sean M. Bae, Jaehan Barraza-Alfaro, Marcelo Cuello, Nicolás Curone, Pietro Czekala, Ian Facchini, Stefano Fasano, Daniele Hall, Cassandra Hardiman, Caitlyn Hilder, Thomas Ilee, John D. Fukagawa, Misato Longarini, Cristiano Ménard, François Orihara, Ryuta Pinte, Christophe Price, Daniel J. Rosotti, Giovanni Stadler, Jochen Wilner, David J. Wölfer, Lisa Yen, Hsi-Wei Yoshida, Tomohiro C. Zawadzki, Brianna |
| contents | The exoALMA program gave an unprecedented view of the complex kinematics of protoplanetary disks, revealing diverse structures that remain poorly understood. We show that moderate disk warps ($\sim 0.5-2^\circ$) can naturally explain many of the observed large-scale velocity features with azimuthal wavenumber $m = 1$. Using a simple model, we interpret line-of-sight velocity variations as changes in the projected Keplerian rotation caused by warping of the disk. While not a unique explanation, this interpretation aligns with growing observational evidence that warps are common. We demonstrate that such warps can also produce spiral structures in scattered light and CO brightness temperature, with $\sim 10$ K variations in MWC 758. Within the exoALMA sample, warp properties correlate with stellar accretion rates, suggesting a link between the inner disc and outer disc kinematics. If warps cause large-scale kinematic structure, this has far reaching implications for turbulence, angular momentum transport, and planet formation. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2507_11669 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | exoALMA. XVIII. Interpreting large scale kinematic structures as moderate warping Winter, Andrew J. Benisty, Myriam Izquierdo, Andrés F. Lodato, Giuseppe Teague, Richard Kimmig, Carolin N. Andrews, Sean M. Bae, Jaehan Barraza-Alfaro, Marcelo Cuello, Nicolás Curone, Pietro Czekala, Ian Facchini, Stefano Fasano, Daniele Hall, Cassandra Hardiman, Caitlyn Hilder, Thomas Ilee, John D. Fukagawa, Misato Longarini, Cristiano Ménard, François Orihara, Ryuta Pinte, Christophe Price, Daniel J. Rosotti, Giovanni Stadler, Jochen Wilner, David J. Wölfer, Lisa Yen, Hsi-Wei Yoshida, Tomohiro C. Zawadzki, Brianna Earth and Planetary Astrophysics Solar and Stellar Astrophysics The exoALMA program gave an unprecedented view of the complex kinematics of protoplanetary disks, revealing diverse structures that remain poorly understood. We show that moderate disk warps ($\sim 0.5-2^\circ$) can naturally explain many of the observed large-scale velocity features with azimuthal wavenumber $m = 1$. Using a simple model, we interpret line-of-sight velocity variations as changes in the projected Keplerian rotation caused by warping of the disk. While not a unique explanation, this interpretation aligns with growing observational evidence that warps are common. We demonstrate that such warps can also produce spiral structures in scattered light and CO brightness temperature, with $\sim 10$ K variations in MWC 758. Within the exoALMA sample, warp properties correlate with stellar accretion rates, suggesting a link between the inner disc and outer disc kinematics. If warps cause large-scale kinematic structure, this has far reaching implications for turbulence, angular momentum transport, and planet formation. |
| title | exoALMA. XVIII. Interpreting large scale kinematic structures as moderate warping |
| topic | Earth and Planetary Astrophysics Solar and Stellar Astrophysics |
| url | https://arxiv.org/abs/2507.11669 |