State of the field: extreme precision radial velocities

DA Fischer, G Anglada-Escude… - Publications of the …, 2016 - iopscience.iop.org
Abstract The Second Workshop on Extreme Precision Radial Velocities defined circa 2015
the state of the art Doppler precision and identified the critical path challenges for reaching …

Statistical methods for exoplanet detection with radial velocities

NC Hara, EB Ford - Annual Review of Statistics and Its …, 2023 - annualreviews.org
Exoplanets can be detected with various observational techniques. Among them, radial
velocity (RV) has the key advantages of revealing the architecture of planetary systems and …

Three years of HARPS-N high-resolution spectroscopy and precise radial velocity data for the Sun

X Dumusque, M Cretignier, D Sosnowska… - Astronomy & …, 2021 - aanda.org
Context. The solar telescope connected to HARPS-N has been observing the Sun since the
summer of 2015. Such a high-cadence, long-baseline data set is crucial for understanding …

Separating planetary reflex Doppler shifts from stellar variability in the wavelength domain

A Collier Cameron, EB Ford, S Shahaf… - Monthly Notices of …, 2021 - academic.oup.com
Stellar magnetic activity produces time-varying distortions in the photospheric line profiles of
solar-type stars. These lead to systematic errors in high-precision radial-velocity …

One year of AU Mic with HARPS–II. Stellar activity and star–planet interaction

B Klein, N Zicher, RD Kavanagh… - Monthly Notices of …, 2022 - academic.oup.com
We present a spectroscopic analysis of a 1-yr intensive monitoring campaign of the 22-Myr
old planet-hosting M dwarf AU Mic using the HARPS spectrograph. In a companion paper …

Measuring precise radial velocities on individual spectral lines-II. Dependance of stellar activity signal on line depth

M Cretignier, X Dumusque, R Allart, F Pepe… - Astronomy & …, 2020 - aanda.org
Context. Although the new generation of radial-velocity (RV) instruments such as
ESPRESSO are expected to reach the long-term precision required to find other earths, the …

YARARA: Significant improvement in RV precision through post-processing of spectral time series

M Cretignier, X Dumusque, NC Hara… - Astronomy & Astrophysics, 2021 - aanda.org
Aims. Even the most precise radial-velocity instruments gather high-resolution spectra that
present systematic errors that a data reduction pipeline cannot identify and correct for …

Stellar surface information from the Ca ii H&K lines – I. Intensity profiles of the solar activity components

M Cretignier, AGM Pietrow… - Monthly Notices of the …, 2024 - academic.oup.com
The detection of Earth-like planets with the radial-velocity (RV) method is currently limited by
the presence of stellar activity signatures. On rotational time-scales, spots and plages (or …

A decade of astrocombs: recent advances in frequency combs for astronomy

RA McCracken, JM Charsley, DT Reid - Optics express, 2017 - opg.optica.org
A new regime of precision radial-velocity measurements in the search for Earth-like
exoplanets is being facilitated by high-resolution spectrographs calibrated by laser …

Radial-velocity fitting challenge-II. First results of the analysis of the data set

X Dumusque, F Borsa, M Damasso, RF Diaz… - Astronomy & …, 2017 - aanda.org
Context. Radial-velocity (RV) signals arising from stellar photospheric phenomena are the
main limitation for precise RV measurements. Those signals induce RV variations an order …