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Mxdfz44

All articles tagged with #mxdfz44

science1 month ago•2 min saved

Tiny Galaxy Sends Ionizing Light, Illuminating the Early Universe's Fog

Astronomers using Hubble, with confirmation from the James Webb Space Telescope and the Very Large Telescope, detected ultraviolet light escaping from MXDFz4.4, a tiny but intensely star-forming galaxy about 250 million years after the end of the Epoch of Reionization. The escaping light suggests the galaxy carved channels in its gas, allowing ionizing photons to travel into intergalactic space and helping clear the hydrogen fog that blanketed the early universe. This is one of the clearest glimpses yet of a galaxy from that era contributing to reionization, and it hints that more such galaxies may lie hidden in the deepest space images.

via The Times of India|

#epoch-of-reionization #hubble #ionizing-radiation

science1 month ago•118 min saved

Ancient galaxy emits ionizing light, piercing the early universe's fog

Astronomers using Hubble, JWST, and VLT detected ionizing ultraviolet photons from MXDFz4.4, a compact galaxy about 1.4 billion years after the Big Bang and roughly 250 million years after the Epoch of Reionization, making it the earliest such LyC emitter observed. The galaxy's tiny size but high star-formation rate appears to carve channels in surrounding gas, allowing ionizing light to escape into the intergalactic medium and help clear the universe's hydrogen fog. The discovery, based on a deep Hubble image plus JWST and VLT spectroscopy, offers new clues about how the early cosmos became transparent to light.

via Live Science|

#astronomy #hubble-space-telescope #james-webb-space-telescope

space2 months ago•98 min saved

Hubble uncovers a distant galaxy that pierced the early universe's hydrogen fog

The Hubble Space Telescope detected ultraviolet light from MXDFz4.4, a compact, star-forming galaxy at redshift 4.4, showing bursts of ionizing UV radiation from a dense cluster of hot, massive stars. This radiation helped ionize surrounding neutral hydrogen, offering a closer look at the Epoch of Reionization when the universe became transparent to ultraviolet light. The finding, supported by JWST observations that reveal the galaxy’s star-formation history, suggests that bursts from young star clusters in early galaxies played a major role in clearing the fog of neutral hydrogen in the early universe; the results appear in The Astrophysical Journal.

via Space|

#early-universe #epoch-of-reionization #hubble-space-telescope