stellar-activity

ACTIN is a Python program to calculate stellar activity indices

Spectral Activity Indices Tool

Python functions to calculate logR'HK for HARPS and ESPRESSO

SOAP is an open-source Python package that simulates the impact of stellar activity and planetary transits on spectroscopic, radial velocity, and photometric data.

Production repository for Diya Ram’s astrophysics portfolio — research, publications, Project Astra, observatory visualizations, live astrophysics news, Cloudflare Workers/R2/D1 backends, responsive design and SEO.

This repository includes 3 Jupyter notebooks and all text files needed to reproduce the numbers and figures given in "High-Pass Filtering and Gaussian Process Regularization: Stellar Activity Characterization Techniques Applied to the 55 Cnc Planetary System".

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Investigation of stellar magnetic activity using variational autoencoder

Inflated hot-Jupiter transit study using real TESS photometry, timing-adjusted fitting and correlated-noise scaling, with haze/cloud and stellar-activity context kept distinct from the measured transit analysis.

Reproducible code and derived data for testing how present-day stellar constraints identify cumulative EUV and wind histories in TOI-700 and LHS 1140.

Ultra-short-period hot-Jupiter transit study using real TESS photometry with timing freedom and explicit noise inflation, designed for a strongly irradiated system where stellar variability can matter.

Radial-velocity activity-disentangling laboratory for separating stellar variability from exoplanet Doppler signals using time-series diagnostics, spectroscopy context and reproducible signal-separation experiments.

Warm Saturn transit study using real TESS photometry, timing and correlated-noise diagnostics, with atmospheric-escape context for a low-density planet orbiting an active K star.

Recover lost files from drives and storage media with this automated, lightweight setup tool for Windows.