Science1 hSeptember 26, 2026, 00:59

JWST captures deepest spectrum of little red dot GLIMPSE-17775

A team led by Vasily Kokorev at UT Austin published in The Astrophysical Journal the deepest spectrum yet of GLIMPSE-17775, a little red dot at redshift 3.501, about 1.8 billion years after the Big Bang. The JWST data point to a rapidly accreting supermassive black hole inside a dense gas cocoon rather than a massive stellar population.

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JWST captures deepest spectrum of little red dot GLIMPSE-17775

Gravitational lens Abell S1063 magnified the light of GLIMPSE-17775
About 30 hours of JWST time, including ~20 hours of NIRSpec spectroscopy
Corrected for lensing, that equals roughly 80 hours of unlensed exposure
Redshift 3.501 places the object ~1.8 billion years after the Big Bang

#JWST#NASA

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