Hostname: page-component-6bf8c574d5-xtvcr Total loading time: 0 Render date: 2025-02-27T04:47:26.586Z Has data issue: false hasContentIssue false
  • English
  • Français

Magnetic activity under tidal influences in the 2+2 hierarchical quadruple system V815 Herculis

Published online by Cambridge University Press:  23 December 2024

Zs. Kövári Open the ORCID record for Zs. Kövári [Opens in a new window] ,
K. G. Strassmeier ,
L. Kriskovics ,
K. Oláh ,
T. Borkovits ,
B. Seli ,
K. Vida  and
Á. Radványi
Zs. Kövári*
Affiliation:
Konkoly Observatory, HUN-REN Research Centre for Astronomy and Earth Sciences, Budapest, Hungary CSFK, MTA Centre of Excellence, Budapest, Hungary
K. G. Strassmeier
Affiliation:
Leibniz–Institute for Astrophysics, Potsdam, Germany
L. Kriskovics
Affiliation:
Konkoly Observatory, HUN-REN Research Centre for Astronomy and Earth Sciences, Budapest, Hungary CSFK, MTA Centre of Excellence, Budapest, Hungary
K. Oláh
Affiliation:
Konkoly Observatory, HUN-REN Research Centre for Astronomy and Earth Sciences, Budapest, Hungary CSFK, MTA Centre of Excellence, Budapest, Hungary
T. Borkovits
Affiliation:
Konkoly Observatory, HUN-REN Research Centre for Astronomy and Earth Sciences, Budapest, Hungary Baja Astronomical Observatory of University of Szeged, Baja, Hungary HUN-REN-SZTE Stellar Astrophysics Research Group, Baja, Hungary
B. Seli
Affiliation:
Konkoly Observatory, HUN-REN Research Centre for Astronomy and Earth Sciences, Budapest, Hungary CSFK, MTA Centre of Excellence, Budapest, Hungary
K. Vida
Affiliation:
Konkoly Observatory, HUN-REN Research Centre for Astronomy and Earth Sciences, Budapest, Hungary CSFK, MTA Centre of Excellence, Budapest, Hungary
Á. Radványi
Affiliation:
Moholy–Nagy University of Art and Design Budapest, Hungary
*
email: kovari@konkoly.hu
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

Tidal forces in close binaries and multiple systems that contain magnetically active component are supposed to influence the operation of magnetic dynamo. Through synchronization the tidal effect of a close companion helps maintain fast rotation, thus supporting an efficient dynamo. At the same time, it can also suppress the differential rotation of the convection zone, or even force the formation of active longitudes at certain phases fixed to the orbit. V815 Her is a four-star system consisting of two close binaries orbiting each other, one of which contains an active G-type main-sequence star. Therefore, the system offers an excellent opportunity to investigate the influence of gravitational effects on solar-type magnetic activity using different methods.

Keywords

close binariesstellar magnetic activitystarspotsDoppler imagingdifferential rotation
Type
Contributed Paper
Information
Proceedings of the International Astronomical Union , Volume 19 , Symposium S365: Dynamics of Solar and Stellar Convection Zones and Atmospheres , December 2023 , pp. 76 - 81
Check for updates
Creative Commons
Creative Common License - CCCreative Common License - BY
This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted re-use, distribution and reproduction, provided the original article is properly cited.
Copyright
© The Author(s), 2024. Published by Cambridge University Press on behalf of International Astronomical Union

References

Carroll, T. A., Strassmeier, K. G., Rice, J. B., & Künstler, A. 2012, The magnetic field topology of the weak-lined T Tauri star V410 Tauri. New strategies for Zeeman–Doppler imaging. A&A, 548, A95.Google Scholar
Fekel, F. C., Barlow, D. J., Scarfe, C. D., Jancart, S., & Pourbaix, D. 2005, HD 166181 = V815 Herculis, a Single-lined Spectroscopic Multiple System. AJ, 129(2), 1001–1007.CrossRefGoogle Scholar
Jetsu, L., Hackman, T., Hall, D. S., Henry, G. W., Kokko, M., & You, J. 2000, Time series analysis of V815 Herculis photometry between 1984 and 1998. A&A, 362, 223–235.Google Scholar
Kövári, Zs., Korhonen, H., Kriskovics, L., Vida, K., Donati, J. F., Le Coroller, H., Monnier, J. D., Pedretti, E., & Petit, P. 2012, Measuring differential rotation of the K-giant ζ Andromedae. A&A, 539, A50.Google Scholar
Kövári, Zs., Kriskovics, L., Künstler, A., Carroll, T. A., Strassmeier, K. G., Vida, K., Oláh, K., Bartus, J., & Weber, M. 2015, Antisolar differential rotation of the K1-giant σ Geminorum revisited. A&A, 573, A98.Google Scholar
Kövári, Zs., Oláh, K., Kriskovics, L., Vida, K., Forgács-Dajka, E., & Strassmeier, K. G. 2017, Rotation-differential rotation relationships for late-type single and binary stars from Doppler imaging. Astronomische Nachrichten, 338(8), 903–909.Google Scholar
Kolláth, Z. & Oláh, K. 2009, Multiple and changing cycles of active stars. I. Methods of analysis and application to the solar cycles. A&A, 501(2), 695–702.Google Scholar
Strassmeier, K. G., Granzer, T., Weber, M., Woche, M., Popow, E., Järvinen, A., Bartus, J., Bauer, S.-M., Dionies, F., Fechner, T., Bittner, W., & Paschke, J. 2010, The STELLA Robotic Observatory on Tenerife. Advances in Astronomy, 2010, 970306.CrossRefGoogle Scholar