1112.6273 (Hitoshi Hanami et al.)

Star Formation and AGN activity in Galaxies classified using the 1.6 μm Bump and PAH features at $z = 0.4-2$    [PDF]

Hitoshi Hanami, Tsuyoshi Ishigaki, Naofumi Fujishiro, Kouichiro Nakanishi, Takamitsu Miyaji, Mirko Krumpe, Keiichi Umetsu, Youichi Ohyama, Hyun Jin Shim, Myungshin Im, Hyoung Mok Lee, Myung Gyoon Lee, Stephen Serjeant, Glenn J. White, Christopher N. Willmer, Tomotsugu Goto, Shinki Oyabu, Toshinobu Takagi, Takehiko Wada, Hideo Matsuhara

We have studied the star-formation and AGN activity of massive galaxies in the redshift range $z=0.4-2$, which are detected in a deep survey field using the AKARI InfraRed (IR) astronomical satellite and {\em Subaru} telescope toward the North Ecliptic Pole (NEP). The AKARI/IRC Mid-InfraRed (MIR) multiband photometry is used to trace their star-forming activities with the Polycyclic-Aromatic Hydrocarbon (PAH) emissions, which is also used to distinguish star-forming populations from AGN dominated ones and to estimate the Star Formation Rate (SFR) derived from their total emitting IR (TIR) luminosities. In combination with analyses of their stellar components, we have studied the MIR SED features of star-forming and AGN-harboring galaxies.

View original: http://arxiv.org/abs/1112.6273