BzK galaxy

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In astrophysics, a BzK galaxy is a galaxy that has been selected as star-forming or passive based on its photometry in the B, z, and K photometric bands.

The selection criteria, as originally defined,^[1] are as follows:

Star-forming BzK (sBzK) galaxies satisfy: $B z K \equiv (z - K)_{A B} - (B - z)_{A B} \geq - 0.2$
Passive BzK (pBzK) galaxies satisfy: $B z K < - 0.2$ and $(z - K)_{A B} > 2.5$

See also

Lyman-break galaxy

References

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Galaxies