A long-term study of the magnetic field and activity in the M giant RZ Ari
International audience Aims. We present a detailed long-term study of the single M6 III giant RZ Ari to obtain direct and simultaneous measurements of the magnetic field, activity indicators, and radial velocity in order to infer the origin of its activity. We study its magnetic activity in the cont...
Published in: | Astronomy & Astrophysics |
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Main Authors: | , , , , , , , , , , , , , , |
Other Authors: | , , , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2024
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Online Access: | https://hal.science/hal-04399760 https://hal.science/hal-04399760/document https://hal.science/hal-04399760/file/aa46949-23.pdf https://doi.org/10.1051/0004-6361/202346949 |
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Open Polar |
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HAL-IN2P3 (Institut national de physique nucléaire et de physique des particules) |
op_collection_id |
fthalin2p3 |
language |
English |
topic |
magnetic fields -dynamo -stars activity -stars evolution -stars late-type magnetic fields -dynamo -stars activity -stars evolution -stars late-type [SDU.ASTR.SR]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Solar and Stellar Astrophysics [astro-ph.SR] |
spellingShingle |
magnetic fields -dynamo -stars activity -stars evolution -stars late-type magnetic fields -dynamo -stars activity -stars evolution -stars late-type [SDU.ASTR.SR]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Solar and Stellar Astrophysics [astro-ph.SR] Konstantinova-Antova, R. Georgiev, S. Lèbre, A. Palacios, A. Morin, Julien Bogdanovski, R. Abbott, C. Baron, F. Aurière, M. Drake, N, A Tsvetkova, S. Josselin, E. Paladini, C. Mathias, P. Zamanov, R. A long-term study of the magnetic field and activity in the M giant RZ Ari |
topic_facet |
magnetic fields -dynamo -stars activity -stars evolution -stars late-type magnetic fields -dynamo -stars activity -stars evolution -stars late-type [SDU.ASTR.SR]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Solar and Stellar Astrophysics [astro-ph.SR] |
description |
International audience Aims. We present a detailed long-term study of the single M6 III giant RZ Ari to obtain direct and simultaneous measurements of the magnetic field, activity indicators, and radial velocity in order to infer the origin of its activity. We study its magnetic activity in the context of stellar evolution, and for this purpose, we also refined its evolutionary status and Li abundance. In general, for the M giants, little is known about the properties of the magnetic activity and its causes. RZ Ari possess the strongest surface magnetic field of the known Zeeman-detected M giants and is bright enough to allow a deep study of its surface magnetic structure. The results are expected to shed light on the activity mechanism in these stars. Methods. We used the spectropolarimeter Narval at the Télescope Bernard Lyot (Observatoire du Pic du Midi, France) to obtain a series of Stokes I and Stokes V profiles for RZ Ari. Using the least-squares deconvolution technique, we were able to detect the Zeeman signature of the magnetic field. We measured its longitudinal component by means of the averaged Stokes V and Stokes I profiles. In addition, we also applied Zeeman-Doppler imaging (ZDI) to search for the rotation period of the star, and we constructed a tentative magnetic map. It is the first magnetic map for a star that evolved at the tip of red giant branch (RGB) or even on the asymptotic giant branch (AGB). The spectra also allowed us to monitor chromospheric emission lines, which are well-known indicators of stellar magnetic activity. From the observations obtained between September 2010 and August 2019, we studied the variability of the magnetic field of RZ Ari. We also redetermined the initial mass and evolutionary status of this star based on current stellar evolutionary tracks and on the angular diameter measured from CHARA interferometry. Results. Our results point to an initial mass of 1.5 M ⊙ so that this giant is more likely an early-AGB star, but a lotaction at the tip of the RGB is not ... |
author2 |
Institute of Astronomy of the Bulgarian Academy of Sciences Bulgarian Academy of Sciences (BAS) Laboratoire Univers et Particules de Montpellier (LUPM) Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM) Georgia State University University System of Georgia (USG) 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) Observatorio Nacional Rio de Janeiro Saint Petersburg State University (SPBU) European Southern Observatory Santiago (ESO) European Southern Observatory (ESO) |
format |
Article in Journal/Newspaper |
author |
Konstantinova-Antova, R. Georgiev, S. Lèbre, A. Palacios, A. Morin, Julien Bogdanovski, R. Abbott, C. Baron, F. Aurière, M. Drake, N, A Tsvetkova, S. Josselin, E. Paladini, C. Mathias, P. Zamanov, R. |
author_facet |
Konstantinova-Antova, R. Georgiev, S. Lèbre, A. Palacios, A. Morin, Julien Bogdanovski, R. Abbott, C. Baron, F. Aurière, M. Drake, N, A Tsvetkova, S. Josselin, E. Paladini, C. Mathias, P. Zamanov, R. |
author_sort |
Konstantinova-Antova, R. |
title |
A long-term study of the magnetic field and activity in the M giant RZ Ari |
title_short |
A long-term study of the magnetic field and activity in the M giant RZ Ari |
title_full |
A long-term study of the magnetic field and activity in the M giant RZ Ari |
title_fullStr |
A long-term study of the magnetic field and activity in the M giant RZ Ari |
title_full_unstemmed |
A long-term study of the magnetic field and activity in the M giant RZ Ari |
title_sort |
long-term study of the magnetic field and activity in the m giant rz ari |
publisher |
HAL CCSD |
publishDate |
2024 |
url |
https://hal.science/hal-04399760 https://hal.science/hal-04399760/document https://hal.science/hal-04399760/file/aa46949-23.pdf https://doi.org/10.1051/0004-6361/202346949 |
genre |
narval narval |
genre_facet |
narval narval |
op_source |
ISSN: 0004-6361 EISSN: 1432-0756 Astronomy and Astrophysics - A&A https://hal.science/hal-04399760 Astronomy and Astrophysics - A&A, 2024, 681, pp.A36. ⟨10.1051/0004-6361/202346949⟩ https://www.aanda.org/articles/aa/full_html/2024/01/aa46949-23/aa46949-23.html |
op_relation |
info:eu-repo/semantics/altIdentifier/arxiv/2312.12549 info:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/202346949 hal-04399760 https://hal.science/hal-04399760 https://hal.science/hal-04399760/document https://hal.science/hal-04399760/file/aa46949-23.pdf ARXIV: 2312.12549 doi:10.1051/0004-6361/202346949 INSPIRE: 2748032 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1051/0004-6361/202346949 |
container_title |
Astronomy & Astrophysics |
container_volume |
681 |
container_start_page |
A36 |
_version_ |
1810486269661151232 |
spelling |
fthalin2p3:oai:HAL:hal-04399760v1 2024-09-15T18:41:53+00:00 A long-term study of the magnetic field and activity in the M giant RZ Ari Konstantinova-Antova, R. Georgiev, S. Lèbre, A. Palacios, A. Morin, Julien Bogdanovski, R. Abbott, C. Baron, F. Aurière, M. Drake, N, A Tsvetkova, S. Josselin, E. Paladini, C. Mathias, P. Zamanov, R. Institute of Astronomy of the Bulgarian Academy of Sciences Bulgarian Academy of Sciences (BAS) Laboratoire Univers et Particules de Montpellier (LUPM) Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM) Georgia State University University System of Georgia (USG) 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) Observatorio Nacional Rio de Janeiro Saint Petersburg State University (SPBU) European Southern Observatory Santiago (ESO) European Southern Observatory (ESO) 2024-01-05 https://hal.science/hal-04399760 https://hal.science/hal-04399760/document https://hal.science/hal-04399760/file/aa46949-23.pdf https://doi.org/10.1051/0004-6361/202346949 en eng HAL CCSD EDP Sciences info:eu-repo/semantics/altIdentifier/arxiv/2312.12549 info:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/202346949 hal-04399760 https://hal.science/hal-04399760 https://hal.science/hal-04399760/document https://hal.science/hal-04399760/file/aa46949-23.pdf ARXIV: 2312.12549 doi:10.1051/0004-6361/202346949 INSPIRE: 2748032 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 0004-6361 EISSN: 1432-0756 Astronomy and Astrophysics - A&A https://hal.science/hal-04399760 Astronomy and Astrophysics - A&A, 2024, 681, pp.A36. ⟨10.1051/0004-6361/202346949⟩ https://www.aanda.org/articles/aa/full_html/2024/01/aa46949-23/aa46949-23.html magnetic fields -dynamo -stars activity -stars evolution -stars late-type magnetic fields -dynamo -stars activity -stars evolution -stars late-type [SDU.ASTR.SR]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Solar and Stellar Astrophysics [astro-ph.SR] info:eu-repo/semantics/article Journal articles 2024 fthalin2p3 https://doi.org/10.1051/0004-6361/202346949 2024-06-25T23:56:25Z International audience Aims. We present a detailed long-term study of the single M6 III giant RZ Ari to obtain direct and simultaneous measurements of the magnetic field, activity indicators, and radial velocity in order to infer the origin of its activity. We study its magnetic activity in the context of stellar evolution, and for this purpose, we also refined its evolutionary status and Li abundance. In general, for the M giants, little is known about the properties of the magnetic activity and its causes. RZ Ari possess the strongest surface magnetic field of the known Zeeman-detected M giants and is bright enough to allow a deep study of its surface magnetic structure. The results are expected to shed light on the activity mechanism in these stars. Methods. We used the spectropolarimeter Narval at the Télescope Bernard Lyot (Observatoire du Pic du Midi, France) to obtain a series of Stokes I and Stokes V profiles for RZ Ari. Using the least-squares deconvolution technique, we were able to detect the Zeeman signature of the magnetic field. We measured its longitudinal component by means of the averaged Stokes V and Stokes I profiles. In addition, we also applied Zeeman-Doppler imaging (ZDI) to search for the rotation period of the star, and we constructed a tentative magnetic map. It is the first magnetic map for a star that evolved at the tip of red giant branch (RGB) or even on the asymptotic giant branch (AGB). The spectra also allowed us to monitor chromospheric emission lines, which are well-known indicators of stellar magnetic activity. From the observations obtained between September 2010 and August 2019, we studied the variability of the magnetic field of RZ Ari. We also redetermined the initial mass and evolutionary status of this star based on current stellar evolutionary tracks and on the angular diameter measured from CHARA interferometry. Results. Our results point to an initial mass of 1.5 M ⊙ so that this giant is more likely an early-AGB star, but a lotaction at the tip of the RGB is not ... Article in Journal/Newspaper narval narval HAL-IN2P3 (Institut national de physique nucléaire et de physique des particules) Astronomy & Astrophysics 681 A36 |