Masao Mori, Astrophysics, University of Tsukuba
Theoretical Astrophysics and Computational Physics

Early galaxies and enrichment · 2004 · Journal article

Can clustered supernova explosions power a giant Lyman-alpha blob?

High-resolution hydrodynamics examines a forming galaxy as a possible supernova-powered Lyman-alpha nebula.

The Nature of Lyα Blobs: Supernova-dominated Primordial Galaxies

The Nature of Lyα Blobs: Supernova-dominated Primordial Galaxies. Mori, Masao; Umemura, Masayuki; Ferrara, Andrea, Astrophysical Journal, 613, L97 (2004).

Approach

A 1024-cubed grid resolves supernova remnants and follows expanding hot cavities, dense cooling shells and metal mixing.

Main result

Colliding shells emit Lyman-alpha radiation with a luminosity of roughly ten to the forty-third erg per second, comparable to observed blobs. Enrichment remains highly uneven.

Scientific implications

The model connects extended emission with early feedback and warns that a single well-mixed chemical zone can miss large abundance variations.

Scope and limitations

Supernova powering is a proposed explanation for this class of objects; agreement in luminosity and morphology does not exclude other power sources.

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