The hot Jupiter of the magnetically-active weak-line T Tauri star V830 Tau
We report results of an extended spectropolarimetric and photometric monitoring of the weak-line T Tauri star V830 Tau and its recently-detected newborn close-in giant planet. Our observations, carried out within the MaTYSSE programme, were spread over 91 d, and involved the ESPaDOnS and Narval spec...
Published in: | Monthly Notices of the Royal Astronomical Society |
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Online Access: | https://risweb.st-andrews.ac.uk/portal/en/researchoutput/the-hot-jupiter-of-the-magneticallyactive-weakline-t-tauri-star-v830-tau(65a74099-4e4d-4c7e-b3a0-f13ceea1d31d).html https://doi.org/10.1093/mnras/stw2904 https://research-repository.st-andrews.ac.uk/bitstream/10023/9830/1/Jardine_2016_MNRAS_TTauriStar_AAM.pdf https://arxiv.org/abs/1611.02055 |
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ftunstandrewcris:oai:risweb.st-andrews.ac.uk:publications/65a74099-4e4d-4c7e-b3a0-f13ceea1d31d 2023-05-15T18:50:49+02:00 The hot Jupiter of the magnetically-active weak-line T Tauri star V830 Tau Donati, J.-F. Yu, L. Moutou, C. Cameron, A. C. Malo, L. Grankin, K. Hébrard, E. Hussain, G. A. J. Vidotto, A. A. Alencar, S. H. P. Haywood, R. D. Bouvier, J. Petit, P. Takami, M. Herczeg, G. J. Gregory, S. G. Jardine, M. M. Morin, J. 2017-03-01 application/pdf https://risweb.st-andrews.ac.uk/portal/en/researchoutput/the-hot-jupiter-of-the-magneticallyactive-weakline-t-tauri-star-v830-tau(65a74099-4e4d-4c7e-b3a0-f13ceea1d31d).html https://doi.org/10.1093/mnras/stw2904 https://research-repository.st-andrews.ac.uk/bitstream/10023/9830/1/Jardine_2016_MNRAS_TTauriStar_AAM.pdf https://arxiv.org/abs/1611.02055 eng eng info:eu-repo/semantics/openAccess Donati , J-F , Yu , L , Moutou , C , Cameron , A C , Malo , L , Grankin , K , Hébrard , E , Hussain , G A J , Vidotto , A A , Alencar , S H P , Haywood , R D , Bouvier , J , Petit , P , Takami , M , Herczeg , G J , Gregory , S G , Jardine , M M , Morin , J & MaTYSSE Collaboration 2017 , ' The hot Jupiter of the magnetically-active weak-line T Tauri star V830 Tau ' , Monthly Notices of the Royal Astronomical Society , vol. 465 , no. 3 , pp. 3343-3360 . https://doi.org/10.1093/mnras/stw2904 Stars: magnetic fields Stars: formation Stars: imaging Stars: planetary systems Stars: individual: V830 Tau Techniques: polarimetric article 2017 ftunstandrewcris https://doi.org/10.1093/mnras/stw2904 2022-06-02T07:46:48Z We report results of an extended spectropolarimetric and photometric monitoring of the weak-line T Tauri star V830 Tau and its recently-detected newborn close-in giant planet. Our observations, carried out within the MaTYSSE programme, were spread over 91 d, and involved the ESPaDOnS and Narval spectropolarimeters linked to the 3.6-m Canada-France-Hawaii, the 2-m Bernard Lyot and the 8-m Gemini-North Telescopes. Using Zeeman-Doppler Imaging, we characterize the surface brightness distributions, magnetic topologies and surface differential rotation of V830 Tau at the time of our observations, and demonstrate that both distributions evolve with time beyond what is expected from differential rotation. We also report that near the end of our observations, V830 Tau triggered one major flare and two weaker precursors, showing up as enhanced red-shifted emission in multiple spectral activity proxies. With 3 different filtering techniques, we model the radial velocity (RV) activity jitter (of semi-amplitude 1.2 km s −1 ) that V830 Tau generates, successfully retrieve the 68 ± 11 m s −1 RV planet signal hiding behind the jitter, further confirm the existence of V830 Tau b and better characterize its orbital parameters. We find that the method based on Gaussian-process regression performs best thanks to its higher ability at modelling not only the activity jitter, but also its temporal evolution over the course of our observations, and succeeds at reproducing our RV data down to a rms precision of 35 m s −1 . Our result provides new observational constraints on scenarios of star / planet formation and demonstrates the scientific potential of large-scale searches for close-in giant planets around T Tauri stars. Article in Journal/Newspaper narval narval University of St Andrews: Research Portal Canada Gemini ENVELOPE(-62.500,-62.500,-66.133,-66.133) Jupiter ENVELOPE(101.133,101.133,-66.117,-66.117) Monthly Notices of the Royal Astronomical Society 465 3 3343 3360 |
institution |
Open Polar |
collection |
University of St Andrews: Research Portal |
op_collection_id |
ftunstandrewcris |
language |
English |
topic |
Stars: magnetic fields Stars: formation Stars: imaging Stars: planetary systems Stars: individual: V830 Tau Techniques: polarimetric |
spellingShingle |
Stars: magnetic fields Stars: formation Stars: imaging Stars: planetary systems Stars: individual: V830 Tau Techniques: polarimetric Donati, J.-F. Yu, L. Moutou, C. Cameron, A. C. Malo, L. Grankin, K. Hébrard, E. Hussain, G. A. J. Vidotto, A. A. Alencar, S. H. P. Haywood, R. D. Bouvier, J. Petit, P. Takami, M. Herczeg, G. J. Gregory, S. G. Jardine, M. M. Morin, J. The hot Jupiter of the magnetically-active weak-line T Tauri star V830 Tau |
topic_facet |
Stars: magnetic fields Stars: formation Stars: imaging Stars: planetary systems Stars: individual: V830 Tau Techniques: polarimetric |
description |
We report results of an extended spectropolarimetric and photometric monitoring of the weak-line T Tauri star V830 Tau and its recently-detected newborn close-in giant planet. Our observations, carried out within the MaTYSSE programme, were spread over 91 d, and involved the ESPaDOnS and Narval spectropolarimeters linked to the 3.6-m Canada-France-Hawaii, the 2-m Bernard Lyot and the 8-m Gemini-North Telescopes. Using Zeeman-Doppler Imaging, we characterize the surface brightness distributions, magnetic topologies and surface differential rotation of V830 Tau at the time of our observations, and demonstrate that both distributions evolve with time beyond what is expected from differential rotation. We also report that near the end of our observations, V830 Tau triggered one major flare and two weaker precursors, showing up as enhanced red-shifted emission in multiple spectral activity proxies. With 3 different filtering techniques, we model the radial velocity (RV) activity jitter (of semi-amplitude 1.2 km s −1 ) that V830 Tau generates, successfully retrieve the 68 ± 11 m s −1 RV planet signal hiding behind the jitter, further confirm the existence of V830 Tau b and better characterize its orbital parameters. We find that the method based on Gaussian-process regression performs best thanks to its higher ability at modelling not only the activity jitter, but also its temporal evolution over the course of our observations, and succeeds at reproducing our RV data down to a rms precision of 35 m s −1 . Our result provides new observational constraints on scenarios of star / planet formation and demonstrates the scientific potential of large-scale searches for close-in giant planets around T Tauri stars. |
format |
Article in Journal/Newspaper |
author |
Donati, J.-F. Yu, L. Moutou, C. Cameron, A. C. Malo, L. Grankin, K. Hébrard, E. Hussain, G. A. J. Vidotto, A. A. Alencar, S. H. P. Haywood, R. D. Bouvier, J. Petit, P. Takami, M. Herczeg, G. J. Gregory, S. G. Jardine, M. M. Morin, J. |
author_facet |
Donati, J.-F. Yu, L. Moutou, C. Cameron, A. C. Malo, L. Grankin, K. Hébrard, E. Hussain, G. A. J. Vidotto, A. A. Alencar, S. H. P. Haywood, R. D. Bouvier, J. Petit, P. Takami, M. Herczeg, G. J. Gregory, S. G. Jardine, M. M. Morin, J. |
author_sort |
Donati, J.-F. |
title |
The hot Jupiter of the magnetically-active weak-line T Tauri star V830 Tau |
title_short |
The hot Jupiter of the magnetically-active weak-line T Tauri star V830 Tau |
title_full |
The hot Jupiter of the magnetically-active weak-line T Tauri star V830 Tau |
title_fullStr |
The hot Jupiter of the magnetically-active weak-line T Tauri star V830 Tau |
title_full_unstemmed |
The hot Jupiter of the magnetically-active weak-line T Tauri star V830 Tau |
title_sort |
hot jupiter of the magnetically-active weak-line t tauri star v830 tau |
publishDate |
2017 |
url |
https://risweb.st-andrews.ac.uk/portal/en/researchoutput/the-hot-jupiter-of-the-magneticallyactive-weakline-t-tauri-star-v830-tau(65a74099-4e4d-4c7e-b3a0-f13ceea1d31d).html https://doi.org/10.1093/mnras/stw2904 https://research-repository.st-andrews.ac.uk/bitstream/10023/9830/1/Jardine_2016_MNRAS_TTauriStar_AAM.pdf https://arxiv.org/abs/1611.02055 |
long_lat |
ENVELOPE(-62.500,-62.500,-66.133,-66.133) ENVELOPE(101.133,101.133,-66.117,-66.117) |
geographic |
Canada Gemini Jupiter |
geographic_facet |
Canada Gemini Jupiter |
genre |
narval narval |
genre_facet |
narval narval |
op_source |
Donati , J-F , Yu , L , Moutou , C , Cameron , A C , Malo , L , Grankin , K , Hébrard , E , Hussain , G A J , Vidotto , A A , Alencar , S H P , Haywood , R D , Bouvier , J , Petit , P , Takami , M , Herczeg , G J , Gregory , S G , Jardine , M M , Morin , J & MaTYSSE Collaboration 2017 , ' The hot Jupiter of the magnetically-active weak-line T Tauri star V830 Tau ' , Monthly Notices of the Royal Astronomical Society , vol. 465 , no. 3 , pp. 3343-3360 . https://doi.org/10.1093/mnras/stw2904 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1093/mnras/stw2904 |
container_title |
Monthly Notices of the Royal Astronomical Society |
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465 |
container_issue |
3 |
container_start_page |
3343 |
op_container_end_page |
3360 |
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1766244573415211008 |