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Herschel/PACS: Constraining clumping in the intermediate wind region of OB stars

Published online by Cambridge University Press:  23 January 2015

M. M. Rubio-Díez ,
F. Najarro ,
J. O. Sundqvist ,
A. Traficante ,
J. Puls ,
L. Calzoletti ,
A. Herrero ,
D. Figer  and
J. Martin-Pintado
M. M. Rubio-Díez
Affiliation:
Centro de Astrobiología, CSIC-INTA, Madrid, Spain email: mmrd@cab.inta-csic.es
F. Najarro
Affiliation:
Centro de Astrobiología, CSIC-INTA, Madrid, Spain email: mmrd@cab.inta-csic.es
J. O. Sundqvist
Affiliation:
Universitätssternwarte München, München, Germany
A. Traficante
Affiliation:
Jodrell Bank Centre for Astrophysics, School of Physics and Astronomy, University of Manchester, Manchester, UK
J. Puls
Affiliation:
Universitätssternwarte München, München, Germany
L. Calzoletti
Affiliation:
ASI Science Data Center, Roma, Italy INAF, Osservatorio Astronomico di Roma, Rome, Italy
A. Herrero
Affiliation:
Instituto de Astrofísica de Canarias, Tenerife, Spain Dpto. de Astrofísica, Universidad de La Laguna, Tenerife, Spain
D. Figer
Affiliation:
Rochester Institute of Technology, NY, USA
J. Martin-Pintado
Affiliation:
Centro de Astrobiología, CSIC-INTA, Madrid, Spain email: mmrd@cab.inta-csic.es
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Abstract

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At present, it is well established that previously accepted mass-loss rates (Ṁ) of luminous OB stars may be overestimated when clumping is neglected. Our Herschel/PACS Far-Infrared (Far-IR) observations of a set of OB stars allow us to improve our knowledge of clumping stratification, constraining clumping properties in intermediate wind regions. In this work, better sampled clumping structure estimates are provided for ι Ori, ε Ori and ξ Per as well as an initial estimate of the clumping properties of the wind from τ Sco. These observations will allow us to obtain reliable mass-loss rates and improve our understanding of the wind physics.

Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 9 , Issue S307: New windows on massive stars: asteroseismology, interferometry, and spectropolarimetry , June 2014 , pp. 137 - 139
Copyright
Copyright © International Astronomical Union 2015 

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