MOIRCS近赤外線分光で探る激進化期銀河の星形成

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(108) ῍῍῍῍῍῍῍῍῍῍῍῍῍῍῍῍῍῍῍῍῍῍῍῍῍῍῍῍῍῍῍῍῍῍῍῍῍῍῍῍῍ MOIRCS ῍ῌ.

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(115) zG. Ùx. y,=> N]^QR7 MOIRCS !rr MCSMDP P mn ` U o p q r . / s Web $ r (http: / / www. naoj. org / Observing / DataReduction) 9 ¡ ¢£D=>. ¥ 104 ¦. ¥8§. High Specific Star Formation Rate Galaxies at z¤2 Tomohiro YOSHIKAWA Kyoto Sangyo University, Motoyama, Kamigamo, Kita-ku, Kyoto 603ῌ8555, Japan Abstract : We present the results of near-infrared multi-object spectroscopic observations for massselected star-forming galaxies at z¤2 conducted with MOIRCS. We derived star formation rates (SFRs) from extinction corrected Ha luminosities. We found that a part of lower-mass galaxies have remarkably high specific SFR (SSFR). The high-SSFR galaxies are young and have higher metallicity. The large SFR implies the possibility that these galaxies play an important role in the star formation of the universe at z¤2.. 399.

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