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Related Experiment Video

Updated: Mar 5, 2026

Bringing the Visible Universe into Focus with Robo-AO

Bringing the Visible Universe into Focus with Robo-AO

Published on: February 12, 2013

Star formation inside a galactic outflow.

R Maiolino^1,2, H R Russell³, A C Fabian³

¹Cavendish Laboratory, University of Cambridge, 19 J. J. Thomson Avenue, Cambridge CB3 0HE, UK.

|March 28, 2017

Summary

This summary is machine-generated.

We found the first direct evidence of star formation occurring within massive galactic outflows. This discovery suggests a new mode of star formation that could impact galaxy evolution and enrich the intergalactic medium.

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Last Updated: Mar 5, 2026

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Area of Science:

Astronomy and Astrophysics
Galaxy Evolution
Star Formation

Background:

Massive galactic outflows possess conditions conducive to star formation.
Models predict star formation within outflows, impacting galaxy morphology and stellar populations.
Observational evidence for star formation within outflows is currently lacking.

Purpose of the Study:

To provide unambiguous observational evidence of star formation within a galactic outflow.
To investigate the potential impact of this star formation mode on galaxy evolution and chemical enrichment.

Main Methods:

Spectroscopic observations of a galactic outflow at redshift 0.0448.
Analysis of spectral data to identify signatures of ongoing star formation.

Main Results:

Unambiguous detection of star formation within the observed galactic outflow.
Inferred star formation rate within the outflow exceeds 15 solar masses per year.
Suggests previous observations may have missed similar phenomena due to inadequate diagnostics.

Conclusions:

Star formation can occur within galactic outflows, challenging previous assumptions.
This mode of star formation may play a significant role in galaxy evolution and the chemical enrichment of the circumgalactic and intergalactic medium.
Further observations with appropriate diagnostics are needed to assess the prevalence of star formation in galactic outflows.