![TiO absorption variation during 8 years on surface of proxima centauri. Vertical lines depicts regions were used to measure B index. -- [astro-ph.SR]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/08/Titanium-Oxide.png?resize=1200%2C715&ssl=1)
[astro-ph.SR] Stellar activity cycles on magnetically active stars can be estimated by molecular absorption bands.
HARPS
Posted inMagnetic Fields, Electromagnetism, bioelectricity,
The Strongest Evidence To Date Of A Magnetic Field On An Exoplanet
[IAC] The Instituto de Astrofísica de Canarias (IAC) is taking part in an international study, published in the journal “Science”, which provides the first conclusive evidence of a planet’s influence […]
Posted inAstronomy & Telescopes, Exoplanets, -moons, -comets, Imaging & Spectroscopy
A Decade Of Monitoring The HIP 41378’s Planetary System
Multi-planetary systems provide key constraints on planet formation and evolution, as their architecture encodes the dynamical history of planets formed within a common protoplanetary disk.
Posted inAstronomy & Telescopes, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report
An Ultra-Short Period Super-Earth And A Sub-Neptune Orbiting The K Dwarf TOI-4311
We report the discovery and characterisation of the multi-planetary system around TOI-4311, a K dwarf kinematically between the Galactic thick disk and Hercules stream. TOI-4311 hosts an ultra-short-period super-Earth (P∼0.99 […]
Posted inAstronomy & Telescopes, Exoplanets, -moons, -comets, Habitable Zones, Imaging & Spectroscopy, Status Report
The RoPES Project With HARPS and HARPS-N III. Two Candidate Planets Orbiting The G-type Star HD 161098
Context. The development of refined instruments and techniques for a detailed analysis of the radial velocities (RVs) of stars other than the Sun allows the presence of planetary signals of […]
Posted inExoplanets, -moons, -comets, Ice Giant, Status Report, Stellar Cartography
Origin And Characterization Of Super-Earths And Sub-Neptunes
Super-Earths and sub-Neptunes represent the most common class of exoplanets discovered to date in our galaxy, yet they have no direct analogues in the Solar System. Since 2014, researchers within […]
Posted inAstronomy & Telescopes, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report, Stellar Cartography
Long-period Magnetic Activity In The K Dwarf GJ 1137 And A New Super-Earth On A 9-day Orbit
Aims: We investigate long-term radial velocity (RV) variability in the K-dwarf star GJ 1137 (HD 93083, HIP52521), a known Saturn-mass exoplanet host, and assess the role of stellar activity in […]
Posted inAstronomy & Telescopes, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Proxima Centauri, Status Report
RedDots: Multiplanet System Around M Dwarf GJ 887 In The Solar Neighborhood
GJ 877 is a bright M dwarf in the solar neighborhood with two currently reported nontransiting exoplanets with periods of 9 d and 21 d, along with an additional unconfirmed […]
Posted inAstronomy & Telescopes, Exoplanets, -moons, -comets, Habitable Zones, Imaging & Spectroscopy, Status Report
The RoPES Project With HARPS and HARPS-N II. A Third Planet In The Multi-planet System HD 176986
Context. Earth-like planets orbiting in the habitable zone of K- to G-type stars create an RV effect in amplitude of less than 1 m s−1 and have orbital periods of […]
Posted inBeta Pictoris, Comets and Asteroids, Exoplanets, -moons, -comets, Icy Worlds, Imaging & Spectroscopy, Status Report
Transit Distances And Composition Of Low-velocity Exocomets In The β Pictoris System
β Pictoris is a young nearby A5V star, about 20 Myr old, embedded in a prominent debris disc. For the past 40 years, variable absorption features have been observed in […]