We report two new low metallicity blue compact dwarf galaxies ( BCDs ) , WISEP J080103.93+264053.9 ( hereafter W0801+26 ) and WISEP J170233.53+180306.4 ( hereafter W1702+18 ) , discovered using the Wide-field Infrared Survey Explorer ( WISE ) .
We identified these two BCDs from their extremely red colors at mid-infrared wavelengths , and obtained follow-up optical spectroscopy using the Low Resolution Imaging Spectrometer on Keck I .
The mid-infrared properties of these two sources are similar to the well studied , extremely low metallicity galaxy SBS 0335-052E .
We determine metallicities of 12 + \log { ( O / H ) } = 7.75 and 7.63 for W0801+26 and W1702+18 , respectively , placing them amongst a very small group of very metal deficient galaxies ( Z \leq 1 / 10 Z _ { \sun } ) .
Their > 300 Å H \beta equivalent widths , similar to SBS 0335-052E , imply the existence of young ( < 5 Myr ) star forming regions .
We measure star formation rates of 2.6 and 10.9 M _ { \sun } yr ^ { -1 } for W0801+26 and W1702+18 , respectively .
These BCDs , showing recent star formation activity in extremely low metallicity environments , provide new laboratories for studying star formation in extreme conditions and are low-redshift analogs of the first generation of galaxies to form in the universe .
Using the all-sky WISE survey , we discuss a new method to identify similar star forming , low metallicity BCDs .