It has become a common practice within the exoplanet field to say that “to know the star is to know the planet.” The properties of the host star have a […]
Stellar Cartography
Posted inAstronomy & Telescopes, Exoplanets, -moons, -comets, Status Report, Stellar Cartography
Differences Between Stable and Unstable Architectures of Compact Planetary Systems
We present a stability analysis of a large set of simulated planetary systems of three or more planets based on architectures of multiplanet systems discovered by Kepler and K2.
Posted inAstronomy & Telescopes, Exoplanets, -moons, -comets, Status Report, Stellar Cartography
Orbital Obliquity of the Young Planet TOI-5398 b and the Evolutionary History of the System
Multi-planet systems exhibit remarkable architectural diversity. However, short-period giant planets are typically isolated. Compact systems like TOI-5398, with an outer close-orbit giant and an inner small-size planet, are rare among […]
Posted inAstronomy & Telescopes, Exoplanets, -moons, -comets, Status Report, Stellar Cartography
A Fading Radius Valley Towards M-dwarfs, A Persistent Density Valley Across Stellar Types
The radius valley separating super-Earths from mini-Neptunes is a fundamental benchmark for theories of planet formation and evolution. Observations show that the location of the radius valley decreases with decreasing […]
Posted inAstronomy & Telescopes, Press Release, Stellar Cartography
NASA Tool Lets You See What Hubble And Webb Are Observing Right Now
It’s not hard to find out what NASA’s Hubble and James Webb space telescopes have observed in the past. Barely a week goes by without news of a cosmic discovery […]
Posted inAstronomy & Telescopes, Brown Dwarfs, Citizen Science / Open Science, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report, Stellar Cartography
89 New Ultracool Dwarf Co-Moving Companions Identified With The Backyard Worlds: Planet 9 Citizen Science Project
We report the identification of 89 new systems containing ultracool dwarf companions to main sequence stars and white dwarfs, using the citizen science project Backyard Worlds: Planet 9 and cross-reference […]
Posted inAstronomy & Telescopes, Status Report, Stellar Cartography
Partial Tidal Disruption Events: The Elixir Of Life
In our Galactic Center, about 10,000 to 100,000 stars are estimated to have survived tidal disruption events, resulting in partially disrupted remnants.
Posted inAstronomy & Telescopes, Exoplanets, -moons, -comets, Space Weather & Heliophysics, Status Report
Cool And Data-Driven: An Exploration Of Optical Cool Dwarf Chemistry With Both Data-Driven And Physical Models
Detailed chemical studies of F/G/K — or Solar-type — stars have long been routine in stellar astrophysics, enabling studies in both Galactic chemodynamics, and exoplanet demographics.
Posted inAstronomy & Telescopes, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Space Weather & Heliophysics, Status Report, Stellar Cartography
Metallicities and Refined Stellar Parameters for 52 Cool Dwarfs with Transiting Planets and Planet Candidates
We collected near-infrared spectra of 65 cool stars with the NASA InfraRed Telescope Facility (IRTF) and analyze them to calculate accurate metallicities and stellar parameters. The sample of 55 M […]
Posted inAstronomy & Telescopes, Exoplanets, -moons, -comets, Habitable Zones, Imaging & Spectroscopy, Status Report, Stellar Cartography
Search For Stellar Companions Of Exoplanet Host Stars With AstraLux/CAHA 2.2 m
Stellar multiplicity is a key aspect of exoplanet diversity, as the presence of more than one star in a planetary system can have both devastating and positive effects on its […]