stellar-activity

ACTIN is a Python program to calculate stellar activity indices

Spectral Activity Indices Tool

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

Python functions to calculate logR'HK for HARPS and ESPRESSO

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".

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.

Investigation of stellar magnetic activity using variational autoencoder

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

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.

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

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.

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

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.