NOAO >   Observing Info >   Approved Programs >   2011A-0587

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Proposal Information for 2011A-0587


PI: Ohyama Youichi, Academia Sinica, ohyama@asiaa.sinica.edu.tw
Address: Institute of Astronomy and Astrophysics, P.O. Box 23-141, Taipei 10617, Taiwan, R.O.C.

CoI: Takagi Toshinobu, ISAS/JAXA, Japan
CoI: Serjeamt Steve, Open University, UK
CoI: Matsuhara Hideo, ISAS/JAXA, Japan
CoI: Lee Hyung-Mok, Seoul University, Korea
CoI: Malkan Matt, UCLA
CoI: Goto Tomotsugu, IfA, UH
CoI: Hanami Hitoshi, Iwate U, Japan

Title: Optical Spectroscopy of Galaxies from the AKARI North Ecliptic Pole (NEP) Survey to z ~ 0.5

Abstract: In a large program, the \it AKARI NEP-Deep survey, we are investigating MIR-selected dust-shrouded star-forming galaxies at z\lesssim 1, whose SED indicates that they are mostly (ultra) luminous infrared galaxies. The Akari/Infrared Camera's unique comprehensive photometric coverage with 9 NIR-MIR bands (2-24(mu)m) provides a wide range of galaxy evolution diagnostics unachievable in any other survey field. We are measuring the effects of dust on various observables, such as emission lines, stellar continuum, PAH, and dust continuum emission. Our proposed HYDRA optical spectroscopy will complement companion programs with larger telescopes on fainter but smaller samples of NEP galaxies. The spectra will allow us to examine star-formation properties in detail, by correlating dust obscuration of the ionized gas (Balmer decrement) and of the stars (optical-NIR SED fitting), attenuation-corrected SFRs (from L_8(mu) m, L_H(alpha)), as well as metallicity (optical line ratios) and starburst age (4000Abreak). We aim to understand the connections between star-formation, AGN activity, and dust properties out to redshifts where strong galaxy evolution occurred.


National Optical Astronomy Observatory, 950 North Cherry Avenue, P.O. Box 26732, Tucson, Arizona 85726, Phone: (520) 318-8000, Fax: (520) 318-8360



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