Topic: Galaxies & Cosmology
Galactic Death may not be Permanent

Galactic Death may not be Permanent

False-colour JWST image of a small fraction of the GOODS South field, with JADES-GS-z7-01-QU highlighted. Credit: JADES Collaboration In a paper in Nature, with Tobias Looser as the first author, researchers discuss a galaxy cataloged as JADES-GS-z7-01-QU. This license plate of a system is shining at us from 700 million years after the Big Bang, and, as near as the researchers can tell, it has already stopped star formation and has a light signature consistent with its youngest stars being 10-20 million years old. This implies that this system formed, underwent a brief and intense period of...

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Gas Ripples Shake Up Ancient Galaxies

Gas Ripples Shake Up Ancient Galaxies

FIR image of BRI 1335–0417 overlaid with our identified bar ellipses (blue ellipse) and two-armed spiral structure identified in Tsukui & Iguchi (2021, black solid line). Contours start at 2σ but are logarithmically spaced in powers of 2 (2σ, 4σ, 8σ,...)....

One Theory Puts Us Somewhere Special

One Theory Puts Us Somewhere Special

The image shows the distribution of matter in space (blue; the yellow dots represent individual galaxies). The Milky Way (green) lies in an area with little matter. The galaxies in the bubble move in the direction of the higher matter densities (red arrows). The...

More Theory-Changing Old Galaxies

More Theory-Changing Old Galaxies

Credit: Cluster image: NASA, UNCOVER (Bezanson et al., DIO: 10.48550/arXiv.2212.04026). Insets: Nasa, UNCOVER (Wang et al., 2023); Composition: Dani Zemba/Penn State Ok, I have to admit, the JWST is finding objects so exceedingly weird that my first reaction is to...

Dark “Stars” or galaxies?

Dark “Stars” or galaxies?

JWST initially identified these three objects (JADES-GS-z13-0, JADES-GS-z12-0 and JADES-GS-z11-0) as galaxies in December 2022. Now a team suggests they might be “dark stars,” theoretical objects powered by particles of dark matter annihilating. Credit: NASA/ESA We...