A Jupiter analogue and a cold Super-Neptune orbiting the solar-twin star HIP 104045

2023/03/02 by Thiago Ferreira, J. Meléndez, Ferreira, Thiago +9
Physics and Astronomy · #Astro and Planetary Science #Astronomy and Astrophysical Research #Earth and Planetary Astrophysics (astro-ph.EP) #FOS: Physical sciences #Stellar, planetary, and galactic studies

paper · pdf · doi:10.48550/arxiv.2303.01358

openalex publication_date 2023/03/02 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We present the discovery of two planets around the solar twin HIP 104045 via radial velocity data obtained with the ESO/HARPS spectrograph as part of the Solar Twin Planet Search observing programme. The joint Keplerian and Gaussian Process model fit accounting for both planetary and intrinsic stellar modulations, as well as no timing-radial velocity correlations of several activity tracers of the host star, reveal the presence of a Jupiter analogue msini_b = 0.498±0.074 M_{\rm Jup} under circular orbit with P_b = 2315±310 days and a cold Super-Neptune msini_c = 43.15±10.3 M_⊕ under circular orbit with P_c = 316±75 days.

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