Astronomy:BzK galaxy
From HandWiki
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: [math]\displaystyle{ BzK \equiv (z-K)_{AB} - (B-z)_{AB} \geq -0.2 }[/math]
- Passive BzK (pBzK) galaxies satisfy: [math]\displaystyle{ BzK \lt -0.2 }[/math] and [math]\displaystyle{ (z-K)_{AB} \gt 2.5 }[/math]
See also
References
- ↑ Daddi, E.; Cimatti, A.; Renzini, A.; Fontana, A.; Mignoli, M.; Pozzetti, L.; Tozzi, P.; Zamorani, G. (2004). "A New Photometric Technique for the Joint Selection of Star-forming and Passive". The Astrophysical Journal 617 (2): 746–764. doi:10.1086/425569. Bibcode: 2004ApJ...617..746D.
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