Search for surface magnetic fields in Mira stars: first results on χ Cyg
Abstract So far, surface magnetic fields have never been reported on Mira stars, while observational facilities allowing detection and measurement of weak surface fields through the Zeeman effect have become available. Then, in order to complete the knowledge of the magnetic field and of its influen...
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Online Access: | http://dx.doi.org/10.1017/s1743921314002579 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S1743921314002579 |
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crcambridgeupr:10.1017/s1743921314002579 2023-05-15T18:50:46+02:00 Search for surface magnetic fields in Mira stars: first results on χ Cyg Lèbre, Agnès Aurière, Michel Fabas, Nicolas Gillet, Denis Herpin, Fabrice Petit, Pascal Konstantinova-Antova, Renada 2013 http://dx.doi.org/10.1017/s1743921314002579 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S1743921314002579 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Proceedings of the International Astronomical Union volume 9, issue S302, page 385-388 ISSN 1743-9213 1743-9221 Astronomy and Astrophysics Space and Planetary Science journal-article 2013 crcambridgeupr https://doi.org/10.1017/s1743921314002579 2022-04-07T08:53:26Z Abstract So far, surface magnetic fields have never been reported on Mira stars, while observational facilities allowing detection and measurement of weak surface fields through the Zeeman effect have become available. Then, in order to complete the knowledge of the magnetic field and of its influence during the transition from Asymptotic Giant Branch (AGB) to Planetary Nebulae (PN) stages, we have undertaken a search for magnetic fields at the surface of Miras. We present the first spectropolarimetric observations (performed with the Narval instrument at Télescope Bernard Lyot-TBL, Pic du Midi, France) of the S-type Mira star χ Cyg. We have detected a polarimetric signal in the Stokes V spectra and we have established its Zeeman origin. We claim that it is likely to be related to a weak magnetic field present at the photospheric level and in the lower part of the stellar atmosphere. The origin of this magnetic field is discussed in the framework of shock waves periodically propagating throughout the atmosphere of a Mira. Article in Journal/Newspaper narval narval Cambridge University Press (via Crossref) Mira ENVELOPE(10.500,10.500,-70.417,-70.417) Proceedings of the International Astronomical Union 9 S302 385 388 |
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Open Polar |
collection |
Cambridge University Press (via Crossref) |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Astronomy and Astrophysics Space and Planetary Science |
spellingShingle |
Astronomy and Astrophysics Space and Planetary Science Lèbre, Agnès Aurière, Michel Fabas, Nicolas Gillet, Denis Herpin, Fabrice Petit, Pascal Konstantinova-Antova, Renada Search for surface magnetic fields in Mira stars: first results on χ Cyg |
topic_facet |
Astronomy and Astrophysics Space and Planetary Science |
description |
Abstract So far, surface magnetic fields have never been reported on Mira stars, while observational facilities allowing detection and measurement of weak surface fields through the Zeeman effect have become available. Then, in order to complete the knowledge of the magnetic field and of its influence during the transition from Asymptotic Giant Branch (AGB) to Planetary Nebulae (PN) stages, we have undertaken a search for magnetic fields at the surface of Miras. We present the first spectropolarimetric observations (performed with the Narval instrument at Télescope Bernard Lyot-TBL, Pic du Midi, France) of the S-type Mira star χ Cyg. We have detected a polarimetric signal in the Stokes V spectra and we have established its Zeeman origin. We claim that it is likely to be related to a weak magnetic field present at the photospheric level and in the lower part of the stellar atmosphere. The origin of this magnetic field is discussed in the framework of shock waves periodically propagating throughout the atmosphere of a Mira. |
format |
Article in Journal/Newspaper |
author |
Lèbre, Agnès Aurière, Michel Fabas, Nicolas Gillet, Denis Herpin, Fabrice Petit, Pascal Konstantinova-Antova, Renada |
author_facet |
Lèbre, Agnès Aurière, Michel Fabas, Nicolas Gillet, Denis Herpin, Fabrice Petit, Pascal Konstantinova-Antova, Renada |
author_sort |
Lèbre, Agnès |
title |
Search for surface magnetic fields in Mira stars: first results on χ Cyg |
title_short |
Search for surface magnetic fields in Mira stars: first results on χ Cyg |
title_full |
Search for surface magnetic fields in Mira stars: first results on χ Cyg |
title_fullStr |
Search for surface magnetic fields in Mira stars: first results on χ Cyg |
title_full_unstemmed |
Search for surface magnetic fields in Mira stars: first results on χ Cyg |
title_sort |
search for surface magnetic fields in mira stars: first results on χ cyg |
publisher |
Cambridge University Press (CUP) |
publishDate |
2013 |
url |
http://dx.doi.org/10.1017/s1743921314002579 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S1743921314002579 |
long_lat |
ENVELOPE(10.500,10.500,-70.417,-70.417) |
geographic |
Mira |
geographic_facet |
Mira |
genre |
narval narval |
genre_facet |
narval narval |
op_source |
Proceedings of the International Astronomical Union volume 9, issue S302, page 385-388 ISSN 1743-9213 1743-9221 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s1743921314002579 |
container_title |
Proceedings of the International Astronomical Union |
container_volume |
9 |
container_issue |
S302 |
container_start_page |
385 |
op_container_end_page |
388 |
_version_ |
1766244519022428160 |