A green astro-comb for Earth-like exoplanet searches

Chih-Hao Li,Alexander G. Glenday,Guoqing Chang,Li-Jin Chen,Gabor Furesz,Nicholas Langellier,A. S. Zibrov,Franz X. Kaertner,David F. Phillips,Dimitar D. Sasselov,Andrew Szentgyorgyi,Ronald L. Walsworth

A green astro-comb for Earth-like exoplanet searches

2014

Chih-Hao Li
Alexander G. Glenday
Guoqing Chang
Li-Jin Chen
Gabor Furesz
Nicholas Langellier
A. S. Zibrov
Franz X. Kaertner
David F. Phillips
Dimitar D. Sasselov
Andrew Szentgyorgyi
Ronald L. Walsworth

Our astro-comb, providing >7000 lines spaced by 16 GHz from 500-620 nm, has been deployed at TNG telescope as a wavelength calibrator for HARPS-N spectrograph. It provides sub-10 cm/s calibration accuracy required for exo-Earth searches.

Keywords:

Spectrograph
Doppler effect
Astronomy
Photonic-crystal fiber
Wavelength
Exoplanet
Physics
Telescope
Optics
Calibration

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