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Modeling Stellar Jitter for the Detection of Earth-Mass Exoplanets via Precision Radial Velocity Measurements

Published online by Cambridge University Press:  20 January 2023

Samuel Granovsky Open the ORCID record for Samuel Granovsky [Opens in a new window] ,
Irina N. Kitiashvili Open the ORCID record for Irina N. Kitiashvili [Opens in a new window]  and
Alan A. Wray
Samuel Granovsky
Affiliation:
NASA Ames Research Center, Moffett Field, MS 258-6, Mountain View, CA, USA New Jersey Institute of Technology, 323 Dr Martin Luther King Jr Blvd, Newark, NJ, USA Universities Space Research Association, 7178 Columbia Gateway Drive, Columbia, MD, USA
Irina N. Kitiashvili
Affiliation:
NASA Ames Research Center, Moffett Field, MS 258-6, Mountain View, CA, USA
Alan A. Wray
Affiliation:
NASA Ames Research Center, Moffett Field, MS 258-6, Mountain View, CA, USA
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Abstract

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The detection of Earth-size exoplanets is a technological and data analysis challenge. Future progress in Earth-mass exoplanet detection is expected from the development of extreme precision radial velocity measurements. Increasing radial velocity precision requires developing a new physics-based data analysis methodology to discriminate planetary signals from host-star-related effects, taking stellar variability and instrumental uncertainties into account. In this work, we investigate and quantify stellar disturbances of the planet-hosting solar-type star HD121504 (G2V spectral type) from 3D radiative modeling obtained with the StellarBox code. The model has been used for determining statistical properties of the turbulent plasma and obtaining synthetic spectroscopic observations for several Fe I lines at different locations on the stellar disk to mimic high-resolution spectroscopic observations.

Keywords

stars: individual (HD121504)line: profilestechniques: radial velocitiesspectroscopicmethods: numerical
Type
Poster Paper
Information
Proceedings of the International Astronomical Union , Volume 16 , Symposium S362: The Predictive Power of Computational Astrophysics as a Discovery Tool , June 2020 , pp. 169 - 172
Creative Commons
Creative Common License - CCCreative Common License - BYCreative Common License - NCCreative Common License - ND
To the extent this is a work of the US Government, it is not subject to copyright protection within the United States. Published by Cambridge University Press on behalf of International Astronomical Union.
This is an Open Access article, distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives licence (https://creativecommons.org/licenses/by-nc-nd/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is unaltered and is properly cited. The written permission of Cambridge University Press must be obtained for commercial re-use or in order to create a derivative work.
Copyright
© National Aeronautics and Space Administration, 2023

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