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These small galaxies were shredded by their larger siblings — but they survived

These small galaxies were shredded by their larger siblings — but they survived
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Peking
Beijing
China
France
Hawaii
United-states
Mauna-kea
Canada
Eric-peng
Kaixiang-wang
Astronomy-research-laboratory
National-optical

Astronomers discover how tiny dwarf galaxies form fossils

When tiny dwarf galaxies age and begin to erode away, they can transform into an even smaller and more dense shape, called an ultra-compact dwarf galaxy.

Peking
Beijing
China
Kaixiang-wang
Eric-peng
Gemini-north
Space
Astronomy
Noirlab
Astronomical-objects
Astrophysics

An evolutionary continuum from nucleated dwarf galaxies to star clusters

Systematic studies1–4 have revealed hundreds of ultra-compact dwarf galaxies (UCDs5) in the nearby Universe. With half-light radii rh of approximately 10–100 parsecs and stellar masses M  ≈ 106–108 solar masses, UCDs are among the densest known stellar systems6. Although similar in appearance to massive globular clusters7, the detection of extended stellar envelopes4,8,9, complex star formation histories10, elevated mass-to-light ratio11,12 and supermassive black holes13–16 suggest that some UCDs are remnant nuclear star clusters17 of tidally stripped dwarf galaxies18,19, or even ancient compact galaxies20. However, only a few objects have been found in the transient stage of tidal stripping21,22, and this assumed evolutionary path19 has never been fully traced by observations. Here we show that 106 galaxies in the Virgo cluster have morphologies that are intermediate between normal, nucleated dwarf galaxies and single-component UCD

Hawaii
United-states
Canada
France
Observatorio-astronomico
Burrell-schmidt
Virgo-cluster
Generation-virgo-cluster
Generation-virgo-cluster-survey
Fornax-cluster
Max-properties
Virgo-cluster-survey

Dwarf galaxies stripped of stars prove to be the missing link in the formation of rare ultra-compact dwarf galaxies

Dwarf galaxies stripped of stars prove to be the missing link in the formation of rare ultra-compact dwarf galaxies
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Canada
Peking
Beijing
China
Chile
United-states
France
American
Eric-peng
Kaixiang-wang
Chris-davis
Mauna-kea

UOP research changing scientists' understanding of planetary systems

UOP research changing scientists' understanding of planetary systems
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Canada
Dustin-madison
Kadri-nizam
Guillermo-barro
Elisa-toloba
Daniel-jontof-hutter
A-university-of-the-pacific
Penn-state-university
Ames-research-center
Planetary-sciences-journal
Associate-professor
Physics-daniel
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