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Pablos Galaxy

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science4 days ago•35 min saved

Webb reveals slow starvation of Pablo's Galaxy by its central black hole

Using JWST and ALMA, astronomers show Pablo's Galaxy (GS-10578) was starved by its central supermassive black hole, which expelled gas in repeated cycles, halting star formation about 400 million years ago; ALMA found little cold gas while JWST measured a current gas outflow of about 60 solar masses per year and speeds up to 2.2 million mph, indicating a slow starvation rather than a single catastrophic event. This mechanism may help explain old-looking galaxies seen by JWST in the early universe.

via Yahoo|

#black-hole #gs-10578 #james-webb-space-telescope

space5 days ago•75 min saved

Webb Reveals Slow Black-Hole Starvation Quenching Pablo’s Galaxy

Astronomers using the James Webb Space Telescope and ALMA traced Pablo’s Galaxy (GS-10578) back to about 11 billion years ago and found it ceased forming stars not due to a violent merger but through slow starvation by its central supermassive black hole. Repeated gas outflows expelled star-forming gas and prevented fresh cold gas from refilling the reservoir, leaving the galaxy—seen as a calm rotating disc—without fuel for new stars and ending star formation around 400 million years ago. With an estimated gas-loss rate of ~60 solar masses per year, the remaining fuel could have run out in roughly 16–220 million years, suggesting black-hole feedback as a key quenching mechanism in early galaxies and potentially explaining why some young galaxies look mature in the early universe.

via Space|

#black-hole-feedback #gs-10578 #james-webb-space-telescope