Current observations of the atmospheres of close-in exoplanets are predominantly obtained with two techniques: low-resolution spectroscopy with space telescopes and high-resolution spectroscopy from the ground. Although the observables delivered by […]
Astronomy & Telescopes
Posted inAstronomy & Telescopes, Exoplanets, -moons, -comets, Press Release
Sub-milli-Kelvin Instruments – Radial Velocity Measurements: Tests with the Habitable-zone Planet Finder
Insufficient instrument thermo-mechanical stability is one of the many roadblocks for achieving 10cm/s Doppler radial velocity (RV) precision, the precision needed to detect Earth-twins orbiting Solar-type stars. Highly temperature and […]
Posted inAstronomy & Telescopes, Press Release, SETI & Technosignatures
Green Bank Observatory Inaugurated
Today astronomers celebrate the inauguration of the Green Bank Observatory in West Virginia, home to the 100-meter Green Bank Telescope, one of the world’s most powerful astronomical instruments. Formerly a […]
Posted inAstrochemistry, Astronomy & Telescopes, Press Release
Discovery of an Extragalactic Hot Molecular Core
Astronomers have discovered a ‘hot molecular core,’ a cocoon of molecules surrounding a newborn massive star, for the first time outside our galaxy. The discovery, which marks the first important […]
Posted inAstronomy & Telescopes, Press Release, Proxima Centauri
Calculations of Periodicity From Hα Profiles of Proxima Centauri
We investigate retrieval of the stellar rotation signal for Proxima Centauri. We make use of high-resolution spectra taken with uves and harps of Proxima Centauri over a 13-year period as […]
Posted inAstrochemistry, Astronomy & Telescopes, Fossils & Paleontology, Press Release
Fossil Evidence Of Supernova Remnants
Physicists from the Technical University of Munich (TUM) have succeeded in detecting a time-resolved supernova signal in the Earth’s microfossil record. As the group of Prof. Shawn Bishop could show, […]
Posted inAstronomy & Telescopes, Exoplanets, -moons, -comets, Press Release
Revised Properties of Kepler M Dwarf Stars and Their Planets
We classified the reddest (r-J> 2.2) stars observed by the NASA Kepler mission into main sequence dwarf or evolved giant stars and determined the properties of 4216 M dwarfs based […]
Posted inAstrochemistry, Astronomy & Telescopes, Press Release
Impact of Non-Uniform Thermal Structure on the Interpretation of Exoplanet Emission Spectra
The determination of atmospheric structure and molecular abundances of planetary atmospheres via spectroscopy involves direct comparisons between models and data. While varying in sophistication, most model-spectra comparisons fundamentally assume “1D” […]
Posted inAstronomy & Telescopes, Exoplanets, -moons, -comets, Press Release
Effects of Proxima Centauri on Planet Formation in Alpha Centauri
Proxima Centauri is an M dwarf approximately 15,000 AU from the Alpha Centauri binary, comoving and likely in a loosely bound orbit. Dynamic simulations show this configuration can form from […]
Posted inAstrochemistry, Astronomy & Telescopes, Exoplanets, -moons, -comets, Press Release
First Sighting Of A Water Snow Line Around A Young Star
Young stars are often surrounded by dense, rotating discs of gas and dust, known as protoplanetary discs, from which planets are born. The heat from a typical young solar-type star […]