Magnetic Fields and Convection in the Cool Supergiant Betelgeuse
International audience We present the outcome of a highly-sensitive search for magnetic fields on the cool supergiant Betelgeuse. A time-series of six circularly polarized spectra was obtained using the NARVAL spectropolarimeter at Télescope Bernard Lyot (Pic du Midi Observatory (F)), between March...
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ftobservparis:oai:HAL:hal-03724814v1 2024-05-19T07:50:08+00:00 Magnetic Fields and Convection in the Cool Supergiant Betelgeuse Petit, Pascal Aurière, M. Konstantinova-Antova, R. Morgenthaler, A. Perrin, Guy Roudier, Thierry Donati, Jean-François Institut de recherche en astrophysique et planétologie (IRAP) Université Toulouse III - Paul Sabatier (UT3) Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP) Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Centre National de la Recherche Scientifique (CNRS) Institute of Astronomy, Bulgarian Academy of Sciences Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA) Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS) Haute résolution angulaire en astrophysique Laboratoire d'études spatiales et d'instrumentation en astrophysique = Laboratory of Space Studies and Instrumentation in Astrophysics (LESIA) Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité) 2013 https://hal.science/hal-03724814 https://doi.org/10.1007/978-3-642-30648-8_9 en eng HAL CCSD info:eu-repo/semantics/altIdentifier/arxiv/1109.3979 info:eu-repo/semantics/altIdentifier/doi/10.1007/978-3-642-30648-8_9 hal-03724814 https://hal.science/hal-03724814 ARXIV: 1109.3979 BIBCODE: 2013LNP.857.231P doi:10.1007/978-3-642-30648-8_9 The Environments of the Sun and the Stars https://hal.science/hal-03724814 The Environments of the Sun and the Stars, 857, pp.231, 2013, ⟨10.1007/978-3-642-30648-8_9⟩ [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] info:eu-repo/semantics/bookPart Book sections 2013 ftobservparis https://doi.org/10.1007/978-3-642-30648-8_9 2024-04-25T01:19:43Z International audience We present the outcome of a highly-sensitive search for magnetic fields on the cool supergiant Betelgeuse. A time-series of six circularly polarized spectra was obtained using the NARVAL spectropolarimeter at Télescope Bernard Lyot (Pic du Midi Observatory (F)), between March and April 2010. Zeeman signatures were repeatedly detected in cross-correlation profiles, corresponding to a longitudinal component of about 1 G. The time-series unveils a smooth increase of the longitudinal field from 0.5 to 1.5 G, correlated with radial velocity fluctuations. We observe a strong asymmetry of Stokes V signatures, also varying in correlation with the radial velocity. The Stokes V line profiles are red-shifted by about 9 km s -1 with respect to the Stokes I profiles, suggesting that the observed magnetic elements may be concentrated in the sinking components of the convective flows. Book Part narval narval Archive de l'Observatoire de Paris (HAL) 231 238 |
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Archive de l'Observatoire de Paris (HAL) |
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ftobservparis |
language |
English |
topic |
[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] |
spellingShingle |
[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] Petit, Pascal Aurière, M. Konstantinova-Antova, R. Morgenthaler, A. Perrin, Guy Roudier, Thierry Donati, Jean-François Magnetic Fields and Convection in the Cool Supergiant Betelgeuse |
topic_facet |
[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] |
description |
International audience We present the outcome of a highly-sensitive search for magnetic fields on the cool supergiant Betelgeuse. A time-series of six circularly polarized spectra was obtained using the NARVAL spectropolarimeter at Télescope Bernard Lyot (Pic du Midi Observatory (F)), between March and April 2010. Zeeman signatures were repeatedly detected in cross-correlation profiles, corresponding to a longitudinal component of about 1 G. The time-series unveils a smooth increase of the longitudinal field from 0.5 to 1.5 G, correlated with radial velocity fluctuations. We observe a strong asymmetry of Stokes V signatures, also varying in correlation with the radial velocity. The Stokes V line profiles are red-shifted by about 9 km s -1 with respect to the Stokes I profiles, suggesting that the observed magnetic elements may be concentrated in the sinking components of the convective flows. |
author2 |
Institut de recherche en astrophysique et planétologie (IRAP) Université Toulouse III - Paul Sabatier (UT3) Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP) Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Centre National de la Recherche Scientifique (CNRS) Institute of Astronomy, Bulgarian Academy of Sciences Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA) Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS) Haute résolution angulaire en astrophysique Laboratoire d'études spatiales et d'instrumentation en astrophysique = Laboratory of Space Studies and Instrumentation in Astrophysics (LESIA) Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité) |
format |
Book Part |
author |
Petit, Pascal Aurière, M. Konstantinova-Antova, R. Morgenthaler, A. Perrin, Guy Roudier, Thierry Donati, Jean-François |
author_facet |
Petit, Pascal Aurière, M. Konstantinova-Antova, R. Morgenthaler, A. Perrin, Guy Roudier, Thierry Donati, Jean-François |
author_sort |
Petit, Pascal |
title |
Magnetic Fields and Convection in the Cool Supergiant Betelgeuse |
title_short |
Magnetic Fields and Convection in the Cool Supergiant Betelgeuse |
title_full |
Magnetic Fields and Convection in the Cool Supergiant Betelgeuse |
title_fullStr |
Magnetic Fields and Convection in the Cool Supergiant Betelgeuse |
title_full_unstemmed |
Magnetic Fields and Convection in the Cool Supergiant Betelgeuse |
title_sort |
magnetic fields and convection in the cool supergiant betelgeuse |
publisher |
HAL CCSD |
publishDate |
2013 |
url |
https://hal.science/hal-03724814 https://doi.org/10.1007/978-3-642-30648-8_9 |
genre |
narval narval |
genre_facet |
narval narval |
op_source |
The Environments of the Sun and the Stars https://hal.science/hal-03724814 The Environments of the Sun and the Stars, 857, pp.231, 2013, ⟨10.1007/978-3-642-30648-8_9⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/arxiv/1109.3979 info:eu-repo/semantics/altIdentifier/doi/10.1007/978-3-642-30648-8_9 hal-03724814 https://hal.science/hal-03724814 ARXIV: 1109.3979 BIBCODE: 2013LNP.857.231P doi:10.1007/978-3-642-30648-8_9 |
op_doi |
https://doi.org/10.1007/978-3-642-30648-8_9 |
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231 |
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238 |
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