Externally Dispersed Interferometry for Precision Radial Velocimetry

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dc.creatorErskine, D. J.
dc.creatorMuterspaugh, M. W.
dc.creatorEdelstein, J.
dc.creatorLloyd, J.
dc.creatorHerter, T.
dc.creatorFeuerstein, W. M.
dc.creatorMuirhead, P.
dc.creatorWishnow, E.
dc.date2007-10-10
dc.date.accessioned2026-07-07T08:35:39Z
dc.date.available2026-07-07T08:35:39Z
dc.descriptionExternally Dispersed Interferometry (EDI) is the series combination of a fixed-delay field-widened Michelson interferometer with a dispersive spectrograph. This combination boosts the spectrograph performance for both Doppler velocimetry and high resolution spectroscopy. The interferometer creates a periodic spectral comb that multiplies against the input spectrum to create moire fringes, which are recorded in combination with the regular spectrum. The moire pattern shifts in phase in response to a Doppler shift. Moire patterns are broader than the underlying spectral features and more easily survive spectrograph blurring and common distortions. Thus, the EDI technique allows lower resolution spectrographs having relaxed optical tolerances (and therefore higher throughput) to return high precision velocity measurements, which otherwise would be imprecise for the spectrograph alone.
dc.description7 Pages, White paper submitted to the AAAC Exoplanet Task Force
dc.identifierhttps://arxiv.org/abs/0710.2130
dc.identifierhttp://arxiv.org/abs/0710.2130
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/139812
dc.subjectAstrophysics
dc.titleExternally Dispersed Interferometry for Precision Radial Velocimetry
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