HWO Target Stars and Systems: Activity and Rotation Catalog (ARC) of Potential Target Stars for the Habitable Worlds Observatory

arXiv:2605.22618 · astro-ph.SR, astro-ph.EP · Submitted 2026-05-21 · Read on arXiv

Tara Fetherolf, Arvind F. Gupta, Elisabeth R. Newton, Andrea P. Buccino, Jennifer A. Burt, Jose A. Caballero, Sebastian Carrazco-Gaxiola, Mariela C. Vieytes, Natalie R. Hinkel, Eric E. Mamajek

astro-ph.SR, astro-ph.EP

Submitted: 2026-05-21

Comments: 29 pages, 11 figures, accepted to PASP, catalog available on GitHub: https://github.com/ernewton/TSS_ARC

Code: https://github.com/ernewton/TSS_ARC

License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/

Terminology

• Calibration — 9× in this paper · explained in 7 episodes
• Activity and Rotation Catalog — 6× in this paper
• Habitable Worlds Observatory — 6× in this paper
• Core — 4× in this paper · explained in 2 episodes
• Target Stars and Systems — 4× in this paper
• Abundance — 3× in this paper · explained in 1 episode
• Consistency — 2× in this paper · explained in 3 episodes
• Kilodegree Extremely Little Telescope — 2× in this paper
• Society of Photo-Optical Instrumentation Engineers — 2× in this paper
• Transmission spectroscopy — 2× in this paper · explained in 2 episodes
• Active Regions — 1× in this paper · explained in 1 episode
• Alignment — 1× in this paper · explained in 1 episode
• Anti-correlation — 1× in this paper · explained in 3 episodes
• Decoupling — 1× in this paper · explained in 2 episodes
• Forward modeling — 1× in this paper · explained in 2 episodes
• Interpretability — 1× in this paper · explained in 15 episodes
• Microlensing — 1× in this paper · explained in 2 episodes
• Next Generation Transit Survey — 1× in this paper
• TESS All-Sky Rotation Survey — 1× in this paper
• Trace — 1× in this paper · explained in 2 episodes
• Verification — 1× in this paper · explained in 2 episodes

Sources

• Habitable Worlds Observatory (HWO): Living Worlds Community Working Group: The Search for Life on Potentially Habitable Exoplanets
• The Pandora SmallSat: A Low-Cost, High Impact Mission to Study Exoplanets and Their Host Stars
• The TESS All-Sky Rotation Survey: Periods for 1,046,317 Stars Within 500 pc
• Precise Radial Velocities
• Habitable Worlds Observatory's Concept and Technology Maturation: Initial Feasibility and Trade Space Exploration
• Data-Driven Modeling of Telluric Features and Stellar Variability with StellarSpectraObservationFitting.jl
• The HARPS search for southern extra-solar planets. XXXI. Magnetic activity cycles in solar-type stars: statistics and impact on precise radial velocities
• NASA Exoplanet Exploration Program (ExEP) Mission Star List for the Habitable Worlds Observatory (2023)
• The All Sky Automated Survey. Variable Stars in the 0h - 6h Quarter of the Southern Hemisphere
• Coronal activity among open cluster stars

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