Tag

M Dwarf Star

All articles tagged with #m dwarf star

science1 year ago•2 min saved

Astronomers Trace Mysterious Radio Bursts to Unlikely Cosmic Sources

Astronomers have identified a mysterious radio signal emanating from the outskirts of the Milky Way, pinpointing its source to a binary star system consisting of an M dwarf and a white dwarf. This discovery, made using the Murchison Widefield Array and MeerKAT telescopes, marks the longest-period radio transient ever detected. The signal, named GLEAM-X J0704-37, challenges previous understanding as M dwarfs alone cannot produce such energy, suggesting a collaborative emission with the white dwarf. Researchers aim to explore more long-period radio transients in the universe.

via Gizmodo|

#astronomy #binary-star-system #m-dwarf-star

astronomy1 year ago•3 min saved

"Astronomers Uncover Ultra-Short-Period Super-Earth in New Discovery"

Using NASA's TESS, astronomers have discovered an ultra-short-period exoplanet, Wolf 327 b, orbiting a nearby M-dwarf star. This super-Earth is slightly larger and 2.5 times more massive than Earth, with a rocky composition and a 13.7-hour orbit. The findings, reported in a paper on arXiv, suggest the potential for detecting secondary transits with the James Webb Space Telescope and hint at the possibility of other planets in the system.

via Phys.org|

#astronomy #exoplanet #m-dwarf-star

astronomy2 years ago•2 min saved

TESS Spots Saturn-like Planet Orbiting M-dwarf Star

NASA's TESS has discovered a new exoplanet, TOI-5344 b, orbiting an M-dwarf star. The planet is similar in size and mass to Saturn and is nearly 10 times larger and 135 times more massive than Earth. It joins a small group of giant exoplanets around M-dwarf stars and has a density of 0.8 g/cm3. The parent star, TOI-5344, is estimated to be 7.1 billion years old and has a high metallicity. Astronomers hope that further discoveries of similar exoplanets will shed light on the formation and evolution of giant exoplanets.

via Phys.org|

#astronomy #exoplanet #m-dwarf-star

astronomy2 years ago•2 min saved

"Groundbreaking Discovery: Super-Earth Spotted Orbiting M-Dwarf Star"

Astronomers using NASA's TESS have discovered a new "super-Earth" exoplanet called TOI-1680 b, which is about 50% larger than Earth and orbits an M-dwarf star located 120 light years away. The planet has a radius of 1.46 Earth radii and a predicted mass of about 3.18 Earth masses. It orbits its host star every 4.8 days at a distance of approximately 0.03 AU. The discovery suggests that TOI-1680 b could be a suitable target for atmospheric characterization studies with the James Webb Space Telescope.

via Phys.org|

#astronomy #exoplanet #m-dwarf-star

astronomy2 years ago•2 min saved

Recent Discoveries in Exoplanets, Asteroids, and Binary Stars

Using NASA's TESS, astronomers have discovered a Venus-sized exoplanet, LHS 475 b, orbiting a nearby M-dwarf star. The planet has a radius of approximately 0.955 Earth radii and orbits its host every 48.7 hours, at a distance of about 0.02 AU from it. The planet's equilibrium temperature was estimated to be some 587 K, thus LHS 475 b is likely too hot to be habitable. The mass of LHS 475 b remains to be determined, but exoplanets of this size are highly likely to be terrestrial and might also have a similar interior composition to that of the Earth's.

via Phys.org|

#astronomy #exoplanet #lhs-475-b

astronomy2 years ago•2 min saved

Astronomers discover massive double-ring disk around distant star.

Using ALMA, astronomers have discovered a large double-ring dust disk around the M-dwarf star 2MASS J04124068+2438157. The disk consists of two narrow rings at distances of 70 and 116 AU, with the outer ring being narrower than the local pressure scale height, suggesting the presence of a pressure bump that traps dust particles. The authors suggest that planet-disk interactions are the most likely explanation for the observed gaps and rings in the disk, with the properties of the gap between the two rings indicating the presence of a Saturn-mass planet at about 90 AU from the star. Further observations are required to confirm this assumption.

via Phys.org|

#alma #astronomy #double-ring-disk