Ly$\alpha$ profile, dust, and prediction of Ly$\alpha$ escape fraction in Green Pea Galaxies

Understand

We studied Lyman-$\alpha$ (Ly$\alpha$) escape in a statistical sample of 43 Green Peas with HST/COS Ly$\alpha$ spectra.

• Green Peas are nearby star-forming galaxies with strong [OIII]$\lambda$5007 emission lines.
• Our sample is four times larger than the previous sample and covers a much more complete range of Green Pea properties.
• We found that about 2/3 of Green Peas are strong Ly$\alpha$ line emitters with rest-frame Ly$\alpha$ equivalent width $>20$ \AA.