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Title: Externally Dispersed Interferometry for Precision Radial Velocimetry

Abstract

Externally 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.

Authors:
; ; ; ; ; ; ;
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
940902
Report Number(s):
UCRL-JRNL-229908
TRN: US200824%%398
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Journal Article
Resource Relation:
Journal Name: AAAC ExoPlanet Task Force subcommittee (requested by NSF, NASA), Amer. Astr. Soc. 211th Meeting, vol. 211, N/A, January 8, 2008, pp. 1
Country of Publication:
United States
Language:
English
Subject:
99 GENERAL AND MISCELLANEOUS; 71 CLASSICAL AND QUANTUMM MECHANICS, GENERAL PHYSICS; ACCURACY; INTERFEROMETERS; INTERFEROMETRY; MICHELSON INTERFEROMETER; PERFORMANCE; RESOLUTION; SPECTROSCOPY; VELOCITY

Citation Formats

Erskine, D J, Muterspaugh, M W, Edelstein, J, Lloyd, J, Herter, T, Feuerstein, W M, Muirhead, P, and Wishnow, E. Externally Dispersed Interferometry for Precision Radial Velocimetry. United States: N. p., 2007. Web.
Erskine, D J, Muterspaugh, M W, Edelstein, J, Lloyd, J, Herter, T, Feuerstein, W M, Muirhead, P, & Wishnow, E. Externally Dispersed Interferometry for Precision Radial Velocimetry. United States.
Erskine, D J, Muterspaugh, M W, Edelstein, J, Lloyd, J, Herter, T, Feuerstein, W M, Muirhead, P, and Wishnow, E. Tue . "Externally Dispersed Interferometry for Precision Radial Velocimetry". United States. doi:. https://www.osti.gov/servlets/purl/940902.
@article{osti_940902,
title = {Externally Dispersed Interferometry for Precision Radial Velocimetry},
author = {Erskine, D J and Muterspaugh, M W and Edelstein, J and Lloyd, J and Herter, T and Feuerstein, W M and Muirhead, P and Wishnow, E},
abstractNote = {Externally 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.},
doi = {},
journal = {AAAC ExoPlanet Task Force subcommittee (requested by NSF, NASA), Amer. Astr. Soc. 211th Meeting, vol. 211, N/A, January 8, 2008, pp. 1},
number = ,
volume = ,
place = {United States},
year = {Tue Mar 27 00:00:00 EDT 2007},
month = {Tue Mar 27 00:00:00 EDT 2007}
}