Nature of Infrared Sources in 11 micron Selected Sample from Early Data of the AKARI North Ecliptic Pole Deep Survey

Hyung Mok Lee; Myungshin Im; Takehiko Wada; Hyunjin Shim; Seong Jin Kim; Myung Gyoon Lee; Narae Hwang; Hideo Matsuhara; Takao Nakagawa; Shinki Oyabu; Chris P. Pearson; Toshinobu Takagi; Takashi Onaka; Naofumi Fujishiro; Hitoshi Hanami; Daisuke Ishihara; Yoshifusa Ita; Hirokazu Kataza; Woojung Kim; Toshio Matusmoto; Hiroshi Murakami; Youichi Ohyama; Itsuki Sakon; Toshiko Tanabe; Kazunori Uemizu; Munetaka Ueno; Fumihiko Usui; Hidenori Watarai

doi:10.1093/pasj/59.sp2.S529

paper

Nature of Infrared Sources in 11 micron Selected Sample from Early Data of the AKARI North Ecliptic Pole Deep Survey

arXiv:0705.1387 · doi:10.1093/pasj/59.sp2.S529

Abstract

We present the properties of 11 $μ$ m selected sources detected in the early data of the North Ecliptic Pole Deep (NEP-Deep) Survey of AKARI. The data set covers 6 wavelength bands from 2.5 to 11 $μ$ m, with the exposure time of 10 ~ 20 minutes. This field lies within the CFHT survey with four filter bands ( $g^{'}, r^{'}, i^{'}, z^{'}), e nab l in g u s t oes t ab l i s hn e a r l y co n t in u o u ss p ec t r a l e n er g y d i s t r ib u t i o n s (S E D s) f or w a v e l e n g t h sr an g in g f r o m 0.4 t o 11$ μ $m . T h e main s am pl es t u d i e d h er eco n s i s t so f 71 so u r ces w h ose 11$ μ $m A B ma g ni t u d es a r ee q u a l t oor b r i g h t er t han 18.5 (251$ μ $J y), w hi c hi sco m pl e t e t o m or e t han 90$ μ $mban d ha s ana d v an t a g eo f s am pl in g s t a r f or min g g a l a x i es w i t h l o w t o m e d i u m r e d s hi f t ss in ce t h e p r o min e n tP A H f e a t u r es hi f t s in t o t hi s ban d . A se x p ec t e d, w e f in d t ha tt h e maj or i t y (68$ μ $mb r i g h t so u r ces a r es t a r f or min g g a l a x i es a t 0.2 < z < 0.7 w i t h$ L_{IR} ~ 10^{10} $- -$ 10^{12} L_{\odot}$ based on the detailed modelling of SEDs. We also find four AGNs lying at various redshifts in the main sample. In addition, we discuss a few sources which have non-typical SEDs of the main sample, including a brown dwarf candidate, a steep power-law source, flat spectrum object, and an early-type galaxy at moderate redshift.

22 pages, 10 figures

Nature of Infrared Sources in 11 micron Selected Sample from Early Data of the AKARI North Ecliptic Pole Deep Survey

Abstract

References in corpus (7)

Cited by in corpus (17)