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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents

ID: 198329.0, MPI für Astronomie / Publikationen_mpia
Hot stars mass-loss studied with Spectro-Polarimetric INterferometry (SPIN)
Authors:Chesneau, O.; Wolf, S.; Domiciano de Souza, A.
Date of Publication (YYYY-MM-DD):2003
Title of Journal:Astronomy and Astrophysics
Journal Abbrev.:Astronomy and Astrophysics
Start Page:375
End Page:388
Sequence Number of Article:2003A&A..410..375C
Review Status:not specified
Audience:Experts Only
Abstract / Description:We present a prospective work undertaken on
Spectro-Polarimetric INterferometry (SPIN). Our
theoretical studies suggest that SPIN is a
powerful tool for studying the mass loss from
early type stars where strong Thomson scattering
is present. Based on Monte Carlo simulations, we
computed the expected SPIN signal for numerous
hot star spectral types covering a broad range of
geometries and optical depths. The SPIN technique
is based on the detection and comparison of the
fringe characteristics (complex visibility)
between two perpendicular directions of
polarization. The most obvious advantage is its
ability to determine the polarization
distribution in spherical winds for which no
detection of polarization is achievable by
classical techniques. In particular, we
demonstrate that the SPIN technique is very
sensitive to the beta parameter from the
so-called ``beta velocity law'' for optically
thin winds. Moreover, the location where the bulk
of polarization is generated can be defined
accurately. The required sensitivity for studying
main sequence OB star winds is still very
demanding (inferior to 0.5
Free Keywords:techniques: interferometric; techniques:
; polarimetric; stars: early-type; stars: winds;
; outflows
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astronomie
External Affiliations:Königstuhl 17, 69117 Heidelberg, Germany),
AB(California Institute of Technology, 1200 E
California Blvd., Mail code 105-24, Pasadena, CA
91125, USA
AC(Département d'Astrophysique de l'Université
de Nice/Sophia-Antipolis, CNRS UMR 6525, France
Identifiers:URL:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bi... [ID No:1]
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