WHERE IS FLUORINE?

By: Ann Dyer, Samantha Sullivan, and Isaac Richter

About Fluorine

• The most reactive element on the periodic table.

• Explodes with hydrogen.

• Only one stable isotope: F-19

• Used for etching glass and atomic bombs (UF6)

01020 Ma in title

Wolf-Rayet Stars

• 1st spectral line studies by G. Rayet & C. Wolf

• Hot, bright, and large (~20 solar masses)

• Form from massive O-type MS stars

• Strange composition: more He than H

• Super gigantic winds!• Mass loss

N III

C IV

He I

Main Sequence Stars• Fusion: hydrogen to helium• Produce fantastic energy• Energy released during fusion

pushes on stellar material (radiation pressure) and balances gravity

• Stars spend 90% of lifetime as a MS star

• The more massive a star is, the less time it spends as a MS star

• Stars with mass < .08 solar masses never become MS stars (brown dwarf stars)

H I

He I

So, where's the fluorine?Wolf-Rayet vs. Main Sequence

• Very turbulent

• Monster stellar winds!

• Lower than normal hydrogen levels

• Short lifespan

• Very rare

• Stable

• Holy hydrogen!

• 90% of lifetime spent as a main sequence star

• Numerous

Fluorine7037

Why there, fluorine?

Fluorine can exist in Wolf-Rayet stars because it is ejected so quickly in the

winds that it can escape the other elements.