About this Website

Welcome to the home of the Extreme Precision Radial Velocity Research Coordination Network (EPRV RCN)! This website is meant to serve as a landing page for the EPRV community where members can come to access or contribute resources such as presentation recordings, software tools / tutorials, graphics & animations, and useful literature references. We're in the early days of development and expect new areas to be created and populated by the community over the coming months.

If there are areas of the website that you're interested in contributing to, we encourage you to engage via the Gitflow workflow outlined on the Website Development page! If you have questions, or resources you'd like to contribute without tackling the github lifestyle, you can reach out to our website oversight team at: eprv.rcn-website [at] jpl.nasa.gov

Not sure where to start? Consider:

• Adding yourself to the public facing RCN Directory so that community members can identify potential new collaborators.
• Adding to the Tutorials page where we're aiming to compile useful examples of code for all areas of EPRV science from data downloads, data reduction, stellar variability analyses, planet fitting, etc.
• Suggesting papers on the EPRV ADS Libraries page.
• Adding figures or animations that you've developed to the Visual Resources page.
• Developing new sections/pages that fit within the EPRV Resources or Professional Development umbrellas (e.g., outlines of how to write compelling EPRV observing proposals or compiling lists of funding opportunities that cover EPRV science or instrumentation).
• Nominating yourself or a collaborator to give an RCN Colloquium.
• Suggesting a topic for a future RCN Workshop.

EPRV RCN Announcements

EPRV RCN Colloquium Series

The next EPRV RCN Colloquium will take place on June 25th, 2026 and feature Dr. Sowmya Krishnamurthy [University of Graz] who will speak about tracing the spectral signatures of stellar granulation and magnetic activity using 3D MHD simulations! For connection info, please refer to the EPRV RCN Google Calendar and/or email updates, available to RCN members.

Abstract: The flows associated with stellar surface inhomogeneities such as granulation and magnetic features distort spectral line profiles and induce radial velocity (RV) jitter. These stellar signals can mask or mimic the Keplerian signatures of orbiting planets, posing a significant challenge for the detection of small Earth-like planets around Sun-like stars. Accurate modelling of intrinsic stellar RV jitter is therefore essential for devising effective mitigation strategies.
In this talk, I will present a methodology developed using three-dimensional magnetohydrodynamic (3D MHD) simulations of the solar and stellar photospheres to model the intrinsic variability of spectral lines. I will discuss the application of this methodology to characterise the differential sensitivity of spectral lines to granulation and magnetic features, and discuss how these results could inform the development of strategies to mitigate stellar signals in RV measurements.

RCN Overview

The EPRV Research Coordination Network (RCN), sponsored by NASA's Exoplanet Exploration Program, aims to support increased communication and collaboration within the radial velocity community as we work towards the goal of obtaining robust mass measurements for Earth analog planets.

Membership is open to the community and we invite participants from all corners of the RV community and related fields, including but not limited to: observational efforts, instrumentation, data analysis techniques, solar studies, and stellar variability mitigation.

Sign up for the RCN using this Google form. Membership provides access to the RCN mailing list, Google Calendar, Slack workspace, and Google Drive.

Note: All members of the EPRV RCN will be required to follow our Code of Conduct.