stochasticity in dwarf galaxies during reionization€¦ · stochasticity in dwarf galaxies during...

Stochasticity in dwarf galaxies during

reionization

Jaime E. Forero-RomeroIAU Gruber Fellow - forero@berkeley.edu

Astronomy Department UC BerkeleyUniversidad de los Andes, Colombia

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Keck

Hubble

VLT

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ELT

JWST

ALMA

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Illin

gwor

th

LyαLyC UV

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JEFR, Yepes, Gottloeber & Prada (2012)

Lyman-alpha / UV

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Siana et al. (2010)

Lyman-C / UV

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Effects of Star Formation Stochasticity on the Lyα & Lyman Continuum Emission from Dwarf Galaxies

JEF-R & Mark Dijsktra, 2012arXiv: 1206.0726

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stochasticity

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Da Silva, Fumagalli & Krumholz (2012)

Star Formation Stochasticity

Sampling stochasticity

Temporal stochasticity

Cluster amplification

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Da Silva, Fumagalli & Krumholz (2012)

Stochastically Lighting Up Galaxies (SLUG)

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Lym

an-a

lpha

Lum

inos

ity

Time [Gyr]0.0 1.0

42.0

43.0

41.0

40.0

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Lyman-alphaequivalent width

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JEFR & Dijkstra (2012)

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JEFR & Dijkstra (2012)

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JEFR & Dijkstra (2012)

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JEFR & Dijkstra (2012)

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JEFR & Dijkstra (2012)

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Lyman-continuumescape fraction

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Siana et al. (2010)

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Siana et al. (2010)

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JEFR & Dijkstra (2012)

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• Explain high EW Lyman-alpha values.

• Produce low EW Lyman-alpha values.

• Explain observations of ‘Lyman-bump galaxies’

• Strong conclusions require large galaxy samples.

Stochasticity in Dwarf Galaxies

Thursday, June 21, 12