Tag

M Dwarf

All articles tagged with #m dwarf

science1 month ago•4 min saved

Webb Dismisses Two Dyson Sphere Candidates as Background Galaxies

NASA's James Webb Space Telescope, in Project Hephaistos, studied two M-dwarf stars previously flagged for potential Dyson Spheres and found the infrared excess arose from background galaxies, not megastructures; the two candidates are ruled out, highlighting the difficulty of technosignature searches and the potential for future higher-resolution infrared surveys in the 2030s to separate signals from foreground/background sources.

via Universe Today|

#dyson-sphere #infrared-astronomy #james-webb-space-telescope

astronomy7 months ago•4 min saved

New Benchmark Earth-Sized World Around a Nearby M-Dwarf Promises Atmospheric Insights

A nearby mid-M-dwarf hosts TOI-4616 b, an Earth-sized planet (1.22 Earth radii) with a 1.55-day orbit and an equilibrium temperature around 525 K, making it a key benchmark for studying atmospheres and atmospheric loss in strongly irradiated rocky worlds around M-dwarfs; its well-documented history and extensive transit follow-up make it a prime target for comparative atmospheric studies, potentially with JWST.

via Universe Today|

#astronomy #atmospheric-escape #benchmark

science11 months ago•3 min saved

JWST Finds Extensive Debris Disk Around Nearby M Dwarf

Astronomers using the James Webb Space Telescope discovered a large debris disk around the nearby M-dwarf star TWA 20, providing new insights into planetary system evolution and demonstrating JWST's sensitivity to faint, cool debris disks around low-luminosity stars.

via Phys.org|

#astronomy #debris-disk #jwst

science1 year ago•2 min saved

Astronomers Decode the Source of Mysterious Cosmic Radio Signals

Astronomers from the International Centre for Radio Astronomy Research have discovered a unique cosmic event, GLEAM-X J0704-37, characterized by long-period radio transients occurring every three hours. Detected in the Puppis constellation, this phenomenon is linked to a binary system involving an M dwarf and a white dwarf, potentially explaining the energy emissions. This finding opens new research avenues and highlights the potential of archival data from the Murchison Widefield Array in uncovering cosmic mysteries.

via The Daily Galaxy --Great Discoveries Channel|

#astronomy #cosmic-phenomena #m-dwarf