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Study of the HARPS Line Profile Using a Laser Frequency Comb

Published online by Cambridge University Press:  29 April 2014

F. Zhao ,
G. Lo Curto ,
L. Pasquini  and
G. Zhao
F. Zhao
Affiliation:
European Southern Observatory, Karl-Schwarzschild-Str. 2, D-85748 Garching bei Munchen, German, email: fzhao@eso.org Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China. Graduate University of Chinese Academy of Sciences, Beijing 100049, China
G. Lo Curto
Affiliation:
European Southern Observatory, Karl-Schwarzschild-Str. 2, D-85748 Garching bei Munchen, German, email: fzhao@eso.org
L. Pasquini
Affiliation:
European Southern Observatory, Karl-Schwarzschild-Str. 2, D-85748 Garching bei Munchen, German, email: fzhao@eso.org
G. Zhao
Affiliation:
Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China.
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Abstract

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High precision spectroscopy is one of the most successful methods to detect extra-solar planets. To enable the detection of Earth-like planets in the habitable zone, extremely precise instruments are required. Our lack of knowledge of the instrument line profile, non-linearity and charge transfer efficiency effects in the detector limits the achievable precision of an instrument. We report our studies on the HARPS (High Accuracy Radial- velocity Planet Searcher) line profiles, measured using the unresolved lines of a Laser Frequency Comb (LFC). We show how the line profile changes as a function of position and signal, and estimate the errors made in the line centroid measurement due to the variation of the line profile.

Keywords

HARPSlaser frequency combradial velocityline profile
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 8 , Symposium S293: Formation, Detection, and Characterization of Extrasolar Habitable Planets , August 2012 , pp. 407 - 409
Copyright
Copyright © International Astronomical Union 2014 

References

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