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A search for correlations between Wolf-Rayet stochastic wind variability and stellar parameters

Published online by Cambridge University Press:  29 August 2024

Guillaume Lenoir-Craig*
Affiliation:
Centre de Recherche en Astrophysique du Québec, Département de physique, Université de Montréal, Complexe des Sciences, Montréal, QC H2V 0B3, Canada
Nicole St-Louis
Affiliation:
Centre de Recherche en Astrophysique du Québec, Département de physique, Université de Montréal, Complexe des Sciences, Montréal, QC H2V 0B3, Canada
Anthony F. J. Moffat
Affiliation:
Centre de Recherche en Astrophysique du Québec, Département de physique, Université de Montréal, Complexe des Sciences, Montréal, QC H2V 0B3, Canada
Herbert Pablo
Affiliation:
American Association of Variable Star Observers, 49 Bay State Road, Cambridge, MA 02138, USA
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Abstract

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We present the results of our analysis of 122 light-curves from 50 Wolf-Rayet (WR) stars using a red+white noise analysis, where we compare the fitted red noise features with stellar parameters to assess the presence of correlations with stellar parameters. A significant correlation between the amplitude of variability α0 and v was found for the whole sample, along with several other correlations satisfying the Spearman-Rank p<0.001 criterion for both He-burning and WNh stars. Our results are compatible with several plausible processes that can have an influence on the level of variability in the winds of these stars, including a subsurface convection zone and core-generated internal gravity waves.

Type
Poster Paper
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 (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted re-use, distribution, and reproduction in any medium, provided the original work is properly cited.
Copyright
© The Author(s), 2024. Published by Cambridge University Press on behalf of International Astronomical Union

References

Bowman, D. M., et al. 2019, Nature Astronomy, 3, 760 Google Scholar
Cantiello, M., et al. 2009, Astronomy and Astrophysics, 499, 279 Google Scholar
Chené, A.-N., St-Louis, N., Moffat, A. F. J., & Gayley, K. G. 2020, ApJ, 903, 113 Google Scholar
Hamann, W. R., et al. 2019, Astronomy and Astrophysics, 625, A57 Google Scholar
Ricker, G. R., et al. 2015, Journal of Astronomical Telescopes, Instruments, and Systems, 1, 014003 Google Scholar
Robert, C., Moffat, A. F. J., Bastien, P., Drissen, L., & St. -Louis, N. 1989, ApJ, 347, 1034Google Scholar
Sander, A. A. C., Hamann, W. R., Todt, H., Hainich, R., Shenar, T., Ramachandran, V., & Oskinova, L. M. 2019, A&A, 621, A92 Google Scholar
Sundqvist, J. O., Owocki, S. P., & Puls, J. 2018, Astronomy and Astrophysics, 611, A17 Google Scholar
Walker, G., et al. 2003, PASP, 115, 1023 Google Scholar
Weiss, W. W., et al. 2014, PASP, 126, 573 Google Scholar