A dedicated polarimeter for the MuSiCoS échelle spectrograph

Details A dedicated polarimeter for the MuSiCoS échelle spectrograph A dedicated polarimeter for the MuSiCoS échelle spectrograph

Jan 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999a%26as..134..149d&link_type=abstract

Astronomy and Astrophysics Supplement, v.134, p.149-159

Astronomy and Astrophysics

Astrophysics

78

Stars: Magnetic Fields, Stars: Circumstellar Matter, Line: Profiles, Polarization, Instrumentation: Polarimeters

Scientific paper

We present in this paper the technical characteristics of a new polarimetric unit dedicated to the MuSiCoS échelle spectrograph. The first test runs indicate that our instrument is very good at measuring polarisation or depolarisation structures in line profiles. It is therefore one of the very few facilities worldwide for studying magnetic topologies of active and chemically peculiar stars through rotational modulation of linearly and circularly polarised Zeeman signatures in line profiles. It is also a very interesting tool for investigating geometries of non-axisymmetric circumstellar environments through depolarisation of spectral lines formed within the scattering envelope.

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