GALEX

GALEX: Galaxy Evolution Explorer: 

GALEX: Galaxy Evolution Explorer By: Jessica Hauss

GALEX: 

GALEX

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What is GALEX?: 

What is GALEX? A small explorer class mission under NASA’s Structure and Evolution of the Universe Division Led by California Institute of Technology

Scientific Goals: 

Scientific Goals Understand the evolution of star formation in galaxies from the early universe to the present. Compare near-by galaxies to older galaxies in order to better understand how galaxies evolve. Map a large section of the Universe

Three Basic Properties: 

Three Basic Properties 1. Speed of light 2. Distribution of galaxies The expansion of the Universe

Spectrum: 

Spectrum

UV light: 

UV light

Galaxies: 

Galaxies Spiral M74 Elliptical - M87 Irregular IC10

What we learn from UV light?: 

What we learn from UV light? Star formation rates Distance Shape of galaxy Gas content How galaxies cluster How these change with time

Surveys: 

Surveys All-Sky Imaging Survey A unique ultraviolet map of the entire sky Deep Sky Imaging A measure of the ultraviolet light from galaxies more than 80% of the way back to the beginning. A Survey of the 200 closest galaxies in ultraviolet.

Spectroscopic Surveys: 

Spectroscopic Surveys Wide-field Spectroscopic Survey Shows how UV emission is related to star formation rates and how much gas and dust is present. Medium-deep Spectroscopic Survey Shows nearby star-forming galaxies so we can compare them to older galaxies. Deep Spectroscopic Survey Show the faintest galaxies with the least star formation.

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Cartwheel Galaxy: 

Cartwheel Galaxy

Cartwheel Galaxy: 

Cartwheel Galaxy

Cartwheel Galaxy: 

Cartwheel Galaxy

Cartwheel Galaxy: 

Cartwheel Galaxy

Cartwheel Galaxy: 

Cartwheel Galaxy

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Thanks…: 

Thanks… www.galex.caltech.edu