&lt;title&gt;Design of mirror image rotator systems&lt;/title&gt;

Denisov, Nikolay A.; Королева, Т. В.

doi:10.1117/12.267725

Cited by 2 publications

(1 citation statement)

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“…The geometrical constraint, which is the most critical of the instrument, and the need to rotate the beam by 180 • , have lead us to search for an alternative to the multiple mirrors solution. 10 Indeed the latter limits the light losses, but it requires at least three mirrors which have to be adjusted very precisely. Therefore, it does not fulfil the size and mechanical requirements.…”

Section: Instrumental Requirementsmentioning

confidence: 99%

DeSSpOt: an instrument for stellar spin orientation determination

Lesage¹,

Schneide²,

Wiedemann³

2012

SPIE Proceedings

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We designed and constructed a special instrument to enable the determination of the stellar's spin orientation. The Differential image rotator for Stellar Spin Orientation, DeSSpOt, allows the simultaneous observations of two anti-parallel orientations of the star on the spectrum. On a high resolution \'echelle spectrum, the stellar rotation causes a slight line tilt visible in the spatial direction which is comparable to a rotation curve. We developed a new method, which exploits the variations in these tilts, to estimate the absolute position angle of the rotation axis. The line tilt is retrieved by a spectro-astrometric extraction of the spectrum. In order to validate the method, we observed spectroscopic binaries with known orbital parameters. The determination of the orbital position angle is equivalent to the determination of the stellar position angle, but is easier to to detect. DeSSpOt was successfully implemented on the high resolution Coud\'e spectrograph of the Th\"uringer Landessternwarte Tautenburg. The observations of Capella led to the determination of the orbital position angle.Comment: In-Press on the Proceedings of the SPIE Conference Astronomical Telescopes + instrumentation 2012, Amsterdam, paper #8446-14

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Section: Instrumental Requirementsmentioning

confidence: 99%