Hostname: page-component-5c6d5d7d68-ckgrl Total loading time: 0 Render date: 2024-08-29T13:01:07.411Z Has data issue: false hasContentIssue false
  • English
  • Français

New empirical mass-loss rates and clumping properties of massive stars

Published online by Cambridge University Press:  29 August 2024

Calum Hawcroft Open the ORCID record for Calum Hawcroft [Opens in a new window] ,
Hugues Sana Open the ORCID record for Hugues Sana [Opens in a new window] ,
Laurent Mahy Open the ORCID record for Laurent Mahy [Opens in a new window] ,
J. O. Sundqvist Open the ORCID record for J. O. Sundqvist [Opens in a new window] ,
M. Abdul-Masih Open the ORCID record for M. Abdul-Masih [Opens in a new window] ,
J. C. Bouret ,
S. A. Brands Open the ORCID record for S. A. Brands [Opens in a new window] ,
A. de Koter ,
F. A. Driessen Open the ORCID record for F. A. Driessen [Opens in a new window]  and
J. Puls
Calum Hawcroft*
Affiliation:
Institute of Astronomy, KU Leuven, Celestijnenlaan 200D, 3001, Leuven, Belgium
Hugues Sana
Affiliation:
Institute of Astronomy, KU Leuven, Celestijnenlaan 200D, 3001, Leuven, Belgium
Laurent Mahy
Affiliation:
Institute of Astronomy, KU Leuven, Celestijnenlaan 200D, 3001, Leuven, Belgium Royal Observatory of Belgium, Avenue Circulaire 3, B-1180 Brussels, Belgium
J. O. Sundqvist
Affiliation:
Institute of Astronomy, KU Leuven, Celestijnenlaan 200D, 3001, Leuven, Belgium
M. Abdul-Masih
Affiliation:
Institute of Astronomy, KU Leuven, Celestijnenlaan 200D, 3001, Leuven, Belgium
J. C. Bouret
Affiliation:
Aix Marseille Univ, CNRS, CNES, LAM, Marseille, France
S. A. Brands
Affiliation:
Astronomical Institute Anton Pannekoek, Amsterdam University, Science Park 904, 1098 XH Amsterdam, The Netherlands
A. de Koter
Affiliation:
Astronomical Institute Anton Pannekoek, Amsterdam University, Science Park 904, 1098 XH Amsterdam, The Netherlands
F. A. Driessen
Affiliation:
Institute of Astronomy, KU Leuven, Celestijnenlaan 200D, 3001, Leuven, Belgium
J. Puls
Affiliation:
LMU München, Universitätssternwarte, Scheinerstr. 1, 81679 München, Germany
*
email: calum.hawcroft@kuleuven.be
Get access Rights & Permissions [Opens in a new window]

Abstract

Hot, massive stars are known to host unstable, radiation-driven outflowing winds, giving rise to dense clumps of material which severely affect the diagnostic techniques used to derive wind properties of massive stars. Most of the current diagnostic models account for wind inhomogeneities by assuming a one-component medium consisting of optically thin clumps, and maintaining a smooth velocity-field. However, this neglects important light-leakage effects through porous channels in-between the clumps. These light-leakage effects have recently been incorporated in the stellar atmosphere modelling code FASTWIND, and here we will present quantitative mass-loss results from a combined Ultraviolet-Optical wind analysis of O-supergiants in the Galaxy. Using a genetic-algorithm fitting-approach, we systematically investigate the impact the wind physics has on derived stellar and wind parameters, and how this depends on metallicity and spectral type. We compare our findings with earlier results (which do not take into account such light-leakage effects), to standard mass-loss rates usually included in evolution model studies of massive stars, and with theoretical predictions of clumping properties. We will also present the first systematic empirical constraints on the new wind parameters, associated with light-leakage, and compare these with theoretical predictions.

Keywords

stars: mass lossstars: early-typestars: atmospheres
Type
Contributed Paper
Information
Proceedings of the International Astronomical Union , Volume 18 , Symposium S361: Massive Stars Near and Far , May 2022 , pp. 168 - 173
Check for updates
Copyright
© The Author(s), 2024. Published by Cambridge University Press on behalf of International Astronomical Union

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Abdul-Masih, M., Sana, H., Sundqvist, J., Mahy, L., Menon, A., Almeida, L. A., De Koter, A., et al. 2019, ApJ, 880, 115 CrossRefGoogle Scholar
Abdul-Masih, M., Sana, H., Hawcroft, C., Almeida, L. A., Brands, S. A., de Mink, S. E., Justham, S., et al. 2021, A&A, 651, A96 Google Scholar
Bouret, J.-C., Hillier, D. J., Lanz, T., Fullerton, A. W. 2012, A&A, 544, A67 Google Scholar
Björklund, R., Sundqvist, J. O., Puls, J., Najarro, F. 2021, A&A, 648, A36 Google Scholar
Brands, S. A., de Koter, A., Bestenlehner, J. M., Crowther, P. A., Sundqvist, J. O., Puls, J., Caballero-Nieves, S. M., et al. 2022, arXiv, arXiv:2202.11080Google Scholar
Bresolin, F., Crowther, P. A., Puls, J. 2008, Proceedings of the International Astronomical Union, 250, 273 Google Scholar
Carlberg, R. G. 1980, ApJ, 241, 1131 CrossRefGoogle Scholar
Carneiro, L. P., Puls, J., Sundqvist, J. O., Hoffmann, T. L. 2016, A&A, 590, A88 Google Scholar
Charbonneau, P. 1995, ApJS, 101, 309 CrossRefGoogle Scholar
Chiosi, Cesare & Maeder, André 1986, Annual Review of Astronomy and Astrophysics, 24, 329–375CrossRefGoogle Scholar
Dessart, L., Owocki, S. P. 2003, A&A, 406, L1 Google Scholar
Driessen, F. A., Sundqvist, J. O., Kee, N. D. 2019, A&A, 631, A172 Google Scholar
Feldmeier, A. 1995, A&A, 299, 523 Google Scholar
Geen, S., Pellegrini, E., Bieri, R., Klessen, R. 2020, MNRAS, 492, 915 CrossRefGoogle Scholar
Hawcroft, C., Sana, H., Mahy, L., Sundqvist, J. O., Abdul-Masih, M., Bouret, J. C., Brands, S. A., de Koter, A., Driessen, F. A., Puls, J. 2021, A&A, 655, A67 Google Scholar
Keszthelyi, Z., Puls, J., Wade, G. A. 2017, A&A, 598, A4 Google Scholar
Langer, N. 2012, ARA&A, 50, 107 Google Scholar
MacGregor, K. B., Hartmann, L., Raymond, J. C. 1979, ApJ, 231, 514 CrossRefGoogle Scholar
Matteucci, F., 2008 Proceedings of the International Astronomical Union, 250, 391 CrossRefGoogle Scholar
Mokiem, M. R., de Koter, A., Puls, J., Herrero, A., Najarro, F., Villamariz, M. R. 2005, A&A, 441, 711 Google Scholar
Mokiem, M. R., de Koter, A., Evans, C. J., Puls, J., Smartt, S. J., Crowther, P. A., Herrero, A., et al. 2006, A&A, 456, 1131 Google Scholar
Mokiem, M. R., de Koter, A., Evans, C. J., Puls, J., Smartt, S. J., Crowther, P. A., Herrero, A., et al. 2007, A&A, 465, 1003 Google Scholar
Oskinova, L. M., Hamann, W.-R., Feldmeier, A. 2007, A&A, 476, 1331 Google Scholar
Owocki, S. P., Rybicki, G. B. 1984, ApJ, 284, 337 CrossRefGoogle Scholar
Owocki, S. P., Castor, J. I., Rybicki, G. B. 1988, ApJ, 335, 914 CrossRefGoogle Scholar
Puls, J., Urbaneja, M. A., Venero, R., Repolust, T., Springmann, U., Jokuthy, A., Mokiem, M. R. 2005, A&A, 435, 669 Google Scholar
Puls, J., Vink, J. S., Najarro, F. 2008, A&ARv, 16, 209 Google Scholar
Ramrez-Agudelo, O. H., Sana, H., de Koter, A., Tramper, F., Grin, N. J., Schneider, F. R. N., Langer, N., et al. 2017, A&A, 600, A81 Google Scholar
Renzo, M., Ott, C. D., Shore, S. N., de Mink, S. E. 2017, A&A, 603, A118 Google Scholar
Rivero González, J. G., Puls, J., Najarro, F. 2011, A&A, 536, A58 Google Scholar
Santolaya-Rey, A. E., Puls, J., Herrero, A. 1997, A&A, 323, 488 Google Scholar
Sundqvist, J. O., Puls, J., Feldmeier, A. 2010, A&A, 510, A11 Google Scholar
Sundqvist, J. O., Owocki, S. P. 2013, MNRAS, 428, 1837 CrossRefGoogle Scholar
Sundqvist, J. O., Puls, J. 2018, A&A, 619, A59 Google Scholar
Sundqvist, J. O., Owocki, S. P., Puls, J. 2018, A&A, 611, A17 Google Scholar
Šurlan, B., Hamann, W.-R., Aret, A., Kubát, J., Oskinova, L. M., Torres, A. F. 2013, A&A, 559, A130 Google Scholar
Tramper, F., Sana, H., de Koter, A., Kaper, L. 2011, ApJL, 741, L8 CrossRefGoogle Scholar
Tramper, F., Sana, H., de Koter, A., Kaper, L., Ramrez-Agudelo, O. H. 2014 A&A, 572, A36 Google Scholar
Vink, J. S., de Koter, A., Lamers, H. J. G. L. M. 2000, A&A, 362, 295 Google Scholar