High-resolution [O i] Line Spectral Mapping of TW Hya Consistent with X-Ray-driven Photoevaporation
Theoretical models indicate that photoevaporative and magnetothermal winds play a crucial role in the evolution and dispersal of protoplanetary disks and affect the formation of planetary systems. However, it is still unclear what wind-driving mechanism is dominant or if both are at work, perhaps at...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2023-01-01
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| Series: | The Astrophysical Journal Letters |
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| Online Access: | https://doi.org/10.3847/2041-8213/acf574 |
| _version_ | 1797680200192884736 |
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| author | Christian Rab Michael L. Weber Giovanni Picogna Barbara Ercolano James E. Owen |
| author_facet | Christian Rab Michael L. Weber Giovanni Picogna Barbara Ercolano James E. Owen |
| author_sort | Christian Rab |
| collection | DOAJ |
| description | Theoretical models indicate that photoevaporative and magnetothermal winds play a crucial role in the evolution and dispersal of protoplanetary disks and affect the formation of planetary systems. However, it is still unclear what wind-driving mechanism is dominant or if both are at work, perhaps at different stages of disk evolution. Recent spatially resolved observations by Fang et al. of the [O i ] 6300 Å spectral line, a common disk wind tracer in TW Hya, revealed that about 80% of the emission is confined to the inner few astronomical units of the disk. In this work, we show that state-of-the-art X-ray-driven photoevaporation models can reproduce the compact emission and the line profile of the [O i ] 6300 Å line. Furthermore, we show that the models also simultaneously reproduce the observed line luminosities and detailed spectral profiles of both the [O i ] 6300 Å and the [Ne ii ] 12.8 μ m lines. While MHD wind models can also reproduce the compact radial emission of the [O i ] 6300 Å line, they fail to match the observed spectral profile of the [O i ] 6300 Å line and underestimate the luminosity of the [Ne ii ] 12.8 μ m line by a factor of 3. We conclude that, while we cannot exclude the presence of an MHD wind component, the bulk of the wind structure of TW Hya is predominantly shaped by a photoevaporative flow. |
| first_indexed | 2024-03-11T23:26:15Z |
| format | Article |
| id | doaj.art-04857d02ce584caf93b00bc0a37861a9 |
| institution | Directory Open Access Journal |
| issn | 2041-8205 |
| language | English |
| last_indexed | 2024-03-11T23:26:15Z |
| publishDate | 2023-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | The Astrophysical Journal Letters |
| spelling | doaj.art-04857d02ce584caf93b00bc0a37861a92023-09-20T10:52:51ZengIOP PublishingThe Astrophysical Journal Letters2041-82052023-01-019551L1110.3847/2041-8213/acf574High-resolution [O i] Line Spectral Mapping of TW Hya Consistent with X-Ray-driven PhotoevaporationChristian Rab0https://orcid.org/0000-0003-1817-6576Michael L. Weber1https://orcid.org/0000-0002-4983-0422Giovanni Picogna2https://orcid.org/0000-0003-3754-1639Barbara Ercolano3https://orcid.org/0000-0001-7868-2740James E. Owen4https://orcid.org/0000-0002-4856-7837University Observatory, Faculty of Physics, Ludwig-Maximilians-Universität München , Scheinerstr. 1, D-81679 Munich, Germany; Max-Planck-Institut für extraterrestrische Physik , Giessenbachstrasse 1, D-85748 Garching, GermanyUniversity Observatory, Faculty of Physics, Ludwig-Maximilians-Universität München , Scheinerstr. 1, D-81679 Munich, Germany; Exzellenzcluster “Origins,” Boltzmannstr. 2, D-85748 Garching, GermanyUniversity Observatory, Faculty of Physics, Ludwig-Maximilians-Universität München , Scheinerstr. 1, D-81679 Munich, GermanyUniversity Observatory, Faculty of Physics, Ludwig-Maximilians-Universität München , Scheinerstr. 1, D-81679 Munich, Germany; Exzellenzcluster “Origins,” Boltzmannstr. 2, D-85748 Garching, GermanyAstrophysics Group, Imperial College London , Blackett Laboratory, Prince Consort Road, London SW7 2AZ, UKTheoretical models indicate that photoevaporative and magnetothermal winds play a crucial role in the evolution and dispersal of protoplanetary disks and affect the formation of planetary systems. However, it is still unclear what wind-driving mechanism is dominant or if both are at work, perhaps at different stages of disk evolution. Recent spatially resolved observations by Fang et al. of the [O i ] 6300 Å spectral line, a common disk wind tracer in TW Hya, revealed that about 80% of the emission is confined to the inner few astronomical units of the disk. In this work, we show that state-of-the-art X-ray-driven photoevaporation models can reproduce the compact emission and the line profile of the [O i ] 6300 Å line. Furthermore, we show that the models also simultaneously reproduce the observed line luminosities and detailed spectral profiles of both the [O i ] 6300 Å and the [Ne ii ] 12.8 μ m lines. While MHD wind models can also reproduce the compact radial emission of the [O i ] 6300 Å line, they fail to match the observed spectral profile of the [O i ] 6300 Å line and underestimate the luminosity of the [Ne ii ] 12.8 μ m line by a factor of 3. We conclude that, while we cannot exclude the presence of an MHD wind component, the bulk of the wind structure of TW Hya is predominantly shaped by a photoevaporative flow.https://doi.org/10.3847/2041-8213/acf574Protoplanetary disksComputational astronomyClassical T Tauri stars |
| spellingShingle | Christian Rab Michael L. Weber Giovanni Picogna Barbara Ercolano James E. Owen High-resolution [O i] Line Spectral Mapping of TW Hya Consistent with X-Ray-driven Photoevaporation The Astrophysical Journal Letters Protoplanetary disks Computational astronomy Classical T Tauri stars |
| title | High-resolution [O i] Line Spectral Mapping of TW Hya Consistent with X-Ray-driven Photoevaporation |
| title_full | High-resolution [O i] Line Spectral Mapping of TW Hya Consistent with X-Ray-driven Photoevaporation |
| title_fullStr | High-resolution [O i] Line Spectral Mapping of TW Hya Consistent with X-Ray-driven Photoevaporation |
| title_full_unstemmed | High-resolution [O i] Line Spectral Mapping of TW Hya Consistent with X-Ray-driven Photoevaporation |
| title_short | High-resolution [O i] Line Spectral Mapping of TW Hya Consistent with X-Ray-driven Photoevaporation |
| title_sort | high resolution o i line spectral mapping of tw hya consistent with x ray driven photoevaporation |
| topic | Protoplanetary disks Computational astronomy Classical T Tauri stars |
| url | https://doi.org/10.3847/2041-8213/acf574 |
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