The large-scale magnetic field of the eccentric pre-main-sequence binary system V1878 Ori Article Swipe
A. Lavail
,
O. Kochukhov
,
G. A. J. Hussain
,
C. Argiroffi
,
E. Alécian
,
J. Morin
·
YOU?
·
· 2020
· Open Access
·
· DOI: https://doi.org/10.1093/mnras/staa1993
YOU?
·
· 2020
· Open Access
·
· DOI: https://doi.org/10.1093/mnras/staa1993
We report time-resolved, high-resolution optical spectropolarimetric observations of the young double-lined spectroscopic binary V1878 Ori. Our observations were collected with the ESPaDOnS spectropolarimeter at the Canada–France–Hawaii Telescope through the BinaMIcS large programme. V1878 Ori A and B are partially convective intermediate mass weak-line T Tauri stars on an eccentric and asynchronous orbit. We also acquired X-ray observations at periastron and outside periastron. Using the least-squares deconvolution technique (LSD) to combine information from many spectral lines, we clearly detected circular polarization signals in both components throughout the orbit. We refined the orbital solution for the system and obtained disentangled spectra for the primary and secondary components. The disentangled spectra were then employed to determine atmospheric parameters of the two components using spectrum synthesis. Applying our Zeeman Doppler imaging code to composite Stokes IV LSD profiles, we reconstructed brightness maps and the global magnetic field topologies of the two components. We find that V1878 Ori A and B have strikingly different global magnetic field topologies and mean field strengths. The global magnetic field of the primary is predominantly poloidal and non-axisymmetric (with a mean field strength of 180 G). While the secondary has a mostly toroidal and axisymmetric global field (mean strength of 310 G). These findings confirm that stars with very similar parameters can exhibit radically different global magnetic field characteristics. The analysis of the X-ray data shows no sign of enhanced activity at periastron, suggesting the lack of strong magnetospheric interaction at this epoch.
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- Type
- article
- Language
- en
- Landing Page
- https://doi.org/10.1093/mnras/staa1993
- https://academic.oup.com/mnras/article-pdf/497/1/632/33531741/staa1993.pdf
- OA Status
- hybrid
- Cited By
- 15
- References
- 83
- Related Works
- 10
- OpenAlex ID
- https://openalex.org/W3041469514
All OpenAlex metadata
Raw OpenAlex JSON
- OpenAlex ID
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https://openalex.org/W3041469514Canonical identifier for this work in OpenAlex
- DOI
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https://doi.org/10.1093/mnras/staa1993Digital Object Identifier
- Title
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The large-scale magnetic field of the eccentric pre-main-sequence binary system V1878 OriWork title
- Type
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articleOpenAlex work type
- Language
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enPrimary language
- Publication year
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2020Year of publication
- Publication date
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2020-07-06Full publication date if available
- Authors
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A. Lavail, O. Kochukhov, G. A. J. Hussain, C. Argiroffi, E. Alécian, J. MorinList of authors in order
- Landing page
-
https://doi.org/10.1093/mnras/staa1993Publisher landing page
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https://academic.oup.com/mnras/article-pdf/497/1/632/33531741/staa1993.pdfDirect link to full text PDF
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YesWhether a free full text is available
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hybridOpen access status per OpenAlex
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https://academic.oup.com/mnras/article-pdf/497/1/632/33531741/staa1993.pdfDirect OA link when available
- Concepts
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Physics, Astrophysics, Zeeman effect, Magnetic field, Stars, Spectral line, Photosphere, Astronomy, Quantum mechanicsTop concepts (fields/topics) attached by OpenAlex
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15Total citation count in OpenAlex
- Citations by year (recent)
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2025: 2, 2024: 2, 2023: 4, 2022: 3, 2021: 4Per-year citation counts (last 5 years)
- References (count)
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83Number of works referenced by this work
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10Other works algorithmically related by OpenAlex
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