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THE AGN POPULATION IN THE AKARI NEP DEEP FIELD
Laia Barrufet de Soto,Glenn J. White,Chris Pearson,STEPHEN SERJEANT,Tanya Lim,Hideo Matsuhara,Nagisa Oi,Marios Karouzos 한국천문학회 2017 天文學論叢 Vol.32 No.1
The AKARI North Ecliptic Pole Deep Field is a natural location to accomplish deep extragalactic surveys. It is supported by comprehensive ancillary data extending from radio to X-ray wavelengths, which have been used to classify radio sources as radio-loud and radio-quiet objectsand to create a catalogue of Active Galactic Nuclei (AGN). This has been achieved by using a radio-optical classificationand colour-colour diagrams rather than the more usual way based on spectroscopyFurthermore, we explore whetherthis technique can be extended by using a far-Infrared (FIR) colour-colour diagram which has been used to identify 268 high redshift candidates.
THE RADIO-FAR INFRARED CORRELATION IN THE NEP DEEP FIELD
Laia Barrufet,Glenn J. White,Chris Pearson,STEPHEN SERJEANT,Tanya Lim,Hideo Matsuhara,Nagisa Oi,Marios Karouzos 한국천문학회 2017 天文學論叢 Vol.32 No.1
We report the results of a multi-wavelength study in the North Ecliptic Pole (NEP) deep field and examine the far infrared-radio correlation (FIRC) for high and low redshift objects. We have found a correlation between the GMRT data at 610 MHz and the Herschel data at $\mathrm{250 \mu m}$ that has been usedto define a spectral index. This spectral index shows no evolution against redshift. As a result of the study, we show a radio colour-infrared diagram that can be used as a redshift indicator.
RADIO IDENTIFICATIONS IN THE NEP DEEP FIELD
Glenn J. White,Laia Barrufet de Soto,CHRIS PEARSON,STEPHEN SERJEANT,Tanya Lim,Hideo Matsuhara,S.K.Sirothia,S.Pal,Marios Karouzos 한국천문학회 2017 天文學論叢 Vol.32 No.1
We have imaged the AKARI Deep Field with the GMRT radio telescope at 610 MHz, detecting 1224 radio components, which are optically identified with 455 optical galaxies having a mean r' magnitude brighter of 22.5 (to a completeness limit of 25.4 mag), and an average redshift ~ 0.8.
PROPERTIES OF THE SCUBA-2 850 μm SOURCES IN THE AKARI NEP-DEEP FIELD
서현종,정웅섭,김민진,김성진,고종완,표정현,김민규,Chris Pearson,Laia Barrufet,Maria del Carmen Campos Varillas,Hideo Matsuhara,Matt Malkan,Helen K. Kim,Toshinobu Takagi,Takamitsu Miyaji,Jorge Diaz Tello,Tomotsugu Goto,Nagi 한국천문학회 2018 Journal of The Korean Astronomical Society Vol.51 No.3
We carry out the study of SMGs in the $AKARI$ NEP-Deep field using James Clerk Maxwell Telescope (JCMT) SCUBA-2 850 $\mu$m source catalog released as a part of SCUBA-2 Cosmology Legacy Survey (S2CLS) program. The SCUBA-2 850 $\mu$m map has a root mean square (rms) noise of 1.2 mJy beam$^{-1}$ and covers an area of 0.60 degree$^{2}$. We find 4 sub-millimeter galaxies (SMGs) which have counterparts to $Herschel$ sources with spectroscopic redshifts in the literature. In addition, 3 dust obscured galaxies (DOGs) detected in $Herschel$ bands are also selected as a comparison sample. We derive IR luminosities of SMGs using CIGALE code, which are similar to those of high redshift SMGs from previous studies. The contribution of AGN to the total IR luminosity in SMG (2\%$-$11\%) is smaller than lower limit of that in DOG (19\%$-$35\%), which is consistent with the expectation from the evolutionary scenario of massive galaxies. We search for SMGs in the overdense region as candidates of protocluster and investigate 4 candidates among them including candidates around three DOGs. Finally, we argue that follow-up spectroscopic observation for the NEP-Deep field will provide crucial information to understand the role of SMGs in the evolution of massive galaxies.