The PLAnetary Transits and Oscillations of stars (PLATO) mission is expected to launch in January 2027. A total of 8\% of its data rate will be dedicated to complementary science […]
astro-ph.SR
Posted inAstronomy & Telescopes, Citizen Science / Open Science, Imaging & Spectroscopy, Interstellar, Status Report, Stellar Cartography
Three Thousand Motion-Confirmed L and T Dwarf Candidates From The Backyard Worlds: Planet 9 Citizen Science Project
The Backyard Worlds: Planet 9 citizen science project uses data from the Wide-field Infrared Survey Explorer to detect infrared objects with significant motion.
Posted inBrown Dwarfs, Exoplanets, -moons, -comets, Gas Giants, Imaging & Spectroscopy, Status Report
The Coldest Known Y Dwarfs: Estimates of their Effective Temperatures
For a decade there has been a factor of 2.5 gap in luminosity between the 275K WISE J085510.83-071442.5 (Luhman 2014) and all other Y dwarfs, with Teff >= 350K. Recently […]
Posted inExoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report, Stellar Cartography
Insights Into The Exoplanet Radius Valley From Host-Star Ages, Activity, Chemistry, And Birth Radius
The radius valley, a bimodal feature in the size distribution of close-in small exoplanets, is widely interpreted as a signature of atmospheric loss and therefore provides a key constraint on […]
Posted inAstrochemistry, Astronomy & Telescopes, Biochemistry & Organic Chemistry, Biosignatures & Paleobiology, Exploration Gear & Tech, Imaging & Spectroscopy, Status Report
High-resolution mid-IR Spectroscopy of SVS 13-A with EXES/SOFIA: The Surprisingly High CH3OH/H2O Ratio In The Planet-forming Zone Of A Solar Mass Protostar
Water and methanol are key components of interstellar ices and gas in star- and planet-forming regions, but direct observations of water in low-mass protostars are challenging due to atmospheric absorption.
Posted inAstronomy & Telescopes, Exoplanets, -moons, -comets, Habitable Zones, Status Report, Stellar Cartography
Solar Twins In Gaia DR3 GSP-Spec II. Age Distribution And Its Implications For The Sun’s Migration
Solar twins are among the most powerful tracers of Galactic disk evolution owing to their unique property of sharing nearly solar metallicities ([Fe/H] ~ 0) while spanning a wide range […]
Posted inAstronomy & Telescopes, Exoplanets, -moons, -comets, Habitable Zones, Space Weather & Heliophysics, Status Report, Stellar Cartography
Long-term Activity Cycles In Planetary M Stars Observed With SOPHIE
M dwarfs are prime targets for exoplanet searches due to their low masses and radii, which enable the detection of small planets in their habitable zones (HZs).
Posted inBiosignatures & Paleobiology, Intelligence & Language, Interstellar, SETI & Technosignatures, Status Report
Stellar Engines And Dyson Bubbles Can Be Stable
A range of speculative space ventures envisage the use of ultra-large structures for the collection and reflection of light.
Posted inAtmospheres, Climate, Weather, Exoplanets, -moons, -comets, Habitable Zones, Imaging & Spectroscopy, Status Report
The GAPS Programme At The TNG: LXX. TOI-5734b: A Hot Sub-Neptune Orbiting A Relatively Young K Dwarf With An Earth-like Density
Increasing interest in young exoplanets is leading to a growing effort to understand the formation and evolutionary processes responsible for their different architectures. One interesting target is TOI-5734, a relatively […]
Posted inAlpha Centauri, Astronomy & Telescopes, Status Report, Stellar Cartography
A Mapping Method Of Age Estimation For Binary Stars: Application To The Alpha Centauri System A And B
Given the wealth of data provided by Gaia and the upcoming PLATO mission, it is essential to improve stellar models to obtain accurate stellar ages. Our objective is to apply […]