Exoplanets, -moons, -comets

Precise Physical Parameters, Habitability, and Orbital Stability of Sun-like SB2 Systems: HD 130669, HD 184467, HD 191854, and HD 214222

By Keith Cowing
Status Report
The Astronomical Journal
October 23, 2025
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Precise Physical Parameters, Habitability, and Orbital Stability of Sun-like SB2 Systems: HD 130669, HD 184467, HD 191854, and HD 214222
Synthetic SED of the binary system HD 191854 constructed using Al-Wardat’s complex method and Kurucz’s ATLAS9 model atmospheres. The total flux (black), flux of component A (blue), and flux of component B (orange) are shown. Overplotted are observed photometric fluxes from 2MASS (J, H), Gaia (BP, RP), and Johnson photometry (B, V), with their respective magnitudes. This comparison validates the consistency between the synthetic model and observed data across a wide wavelength range (3500–18000 Å). — The Astronomical Journal

Circumbinary stability curves for the four binary systems HD 130669, HD 184467, HD 191854, and HD 214222. The curves show the critical semimajor axis acr of a stable circumbinary planet as a function of planet eccentricity ep, calculated based on the orbital and stellar parameters of each system.

This work analyzes four Sun-like double-lined spectroscopic binary systems by combining visual and spectroscopic observational data with Al-Wardat’s atmospheric modeling method to accurately determine their fundamental parameters.

For each system, we determine stellar masses, orbital parallaxes, effective temperatures, spectral types, semimajor axes, and eccentricities with high precision, resolving discrepancies between astrometric and spectroscopic measurements.

Moreover, we assess the potential for stable planetary orbits in these systems. We also calculate habitable zones around these binaries based on the orbital evolution of planetary orbits. These systems may represent promising targets for future extrasolar planet searches around Sun-like stars due to their robust physical and orbital parameters, which can be used to determine planetary habitability and stability.

Precise Physical Parameters, Habitability, and Orbital Stability of Sun-like SB2 Systems: HD 130669, HD 184467, HD 191854, and HD 214222, The Astronomical Journal (open access)

Astrobiology, Stellar Cartography,

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