Optically detected galaxy cluster candidates in the AKARI North Ecliptic Pole field based on photometric redshift from the Subaru Hyper Suprime-Cam
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Optically detected galaxy cluster candidates in the AKARI North Ecliptic Pole field based on photometric redshift from the Subaru Hyper Suprime-Cam. / Huang, Ting-Chi; Matsuhara, Hideo; Goto, Tomotsugu; Santos, Daryl Joe D.; Ho, Simon C-C; Kim, Seong Jin; Hashimoto, Tetsuya; Ikeda, Hiroyuki; Oi, Nagisa; Malkan, Matthew A.; Pearson, William J.; Pollo, Agnieszka; Serjeant, Stephen; Shim, Hyunjin; Miyaji, Takamitsu; Hwang, Ho Seong; Durkalec, Anna; Poliszczuk, Artem; Greve, Thomas R.; Pearson, Chris; Toba, Yoshiki; Lee, Dongseob; Kim, Helen K.; Toft, Sune; Jeong, Woong-Seob; Enokidani, Umi.
In: Monthly Notices of the Royal Astronomical Society, Vol. 506, No. 4, 10.2021, p. 6063-6080.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Optically detected galaxy cluster candidates in the AKARI North Ecliptic Pole field based on photometric redshift from the Subaru Hyper Suprime-Cam
AU - Huang, Ting-Chi
AU - Matsuhara, Hideo
AU - Goto, Tomotsugu
AU - Santos, Daryl Joe D.
AU - Ho, Simon C-C
AU - Kim, Seong Jin
AU - Hashimoto, Tetsuya
AU - Ikeda, Hiroyuki
AU - Oi, Nagisa
AU - Malkan, Matthew A.
AU - Pearson, William J.
AU - Pollo, Agnieszka
AU - Serjeant, Stephen
AU - Shim, Hyunjin
AU - Miyaji, Takamitsu
AU - Hwang, Ho Seong
AU - Durkalec, Anna
AU - Poliszczuk, Artem
AU - Greve, Thomas R.
AU - Pearson, Chris
AU - Toba, Yoshiki
AU - Lee, Dongseob
AU - Kim, Helen K.
AU - Toft, Sune
AU - Jeong, Woong-Seob
AU - Enokidani, Umi
PY - 2021/10
Y1 - 2021/10
N2 - Galaxy clusters provide an excellent probe in various research fields in astrophysics and cosmology. However, the number of galaxy clusters detected so far in the AKARI North Ecliptic Pole (NEP) field is limited. In this work, we provide galaxy cluster candidates in the AKARI NEP field with the minimum requisites based only on the coordinates and photometric redshift (photo-z) of galaxies. We used galaxies detected in five optical bands (g, r, i, z, and Y) by the Subaru Hyper Suprime-Cam (HSC), with additional data from the u band obtained from the Canada-France-Hawaii Telescope (CFHT) MegaPrime/MegaCam, and from the IRAC1 and IRAC2 bands from the Spitzer space telescope for photo-z estimation. We calculated the local density around every galaxy using the 10th-nearest neighbourhood. Cluster candidates were determined by applying the friends-of-friends algorithm to over-densities. A total of 88 cluster candidates containing 4390 member galaxies below redshift 1.1 in 5.4 deg(2) were identified. The reliability of our method was examined through false-detection tests, redshift-uncertainty tests, and applications on the Cosmic Evolution Survey (COSMOS) data, giving false-detection rates of 0.01 to 0.05 and a recovery rate of 0.9 at high richness. Three X-ray clusters previously observed by ROSAT and Chandra were recovered. The cluster galaxies show a higher stellar mass and lower star formation rate compared with the field galaxies in two-sample Z-tests. These cluster candidates are useful for environmental studies of galaxy evolution and future astronomical surveys in the NEP, where AKARI has performed unique nine-band mid-infrared photometry for tens of thousands of galaxies.
AB - Galaxy clusters provide an excellent probe in various research fields in astrophysics and cosmology. However, the number of galaxy clusters detected so far in the AKARI North Ecliptic Pole (NEP) field is limited. In this work, we provide galaxy cluster candidates in the AKARI NEP field with the minimum requisites based only on the coordinates and photometric redshift (photo-z) of galaxies. We used galaxies detected in five optical bands (g, r, i, z, and Y) by the Subaru Hyper Suprime-Cam (HSC), with additional data from the u band obtained from the Canada-France-Hawaii Telescope (CFHT) MegaPrime/MegaCam, and from the IRAC1 and IRAC2 bands from the Spitzer space telescope for photo-z estimation. We calculated the local density around every galaxy using the 10th-nearest neighbourhood. Cluster candidates were determined by applying the friends-of-friends algorithm to over-densities. A total of 88 cluster candidates containing 4390 member galaxies below redshift 1.1 in 5.4 deg(2) were identified. The reliability of our method was examined through false-detection tests, redshift-uncertainty tests, and applications on the Cosmic Evolution Survey (COSMOS) data, giving false-detection rates of 0.01 to 0.05 and a recovery rate of 0.9 at high richness. Three X-ray clusters previously observed by ROSAT and Chandra were recovered. The cluster galaxies show a higher stellar mass and lower star formation rate compared with the field galaxies in two-sample Z-tests. These cluster candidates are useful for environmental studies of galaxy evolution and future astronomical surveys in the NEP, where AKARI has performed unique nine-band mid-infrared photometry for tens of thousands of galaxies.
KW - methods: data analysis
KW - galaxies: clusters: general
KW - galaxies: distance and redshifts
KW - galaxies: evolution
KW - galaxies: groups: general
KW - GALACTIC NUCLEI
KW - WIDE SURVEY
KW - DEEP
KW - CATALOG
KW - MASS
KW - MORPHOLOGY
KW - EVOLUTION
KW - STARS
KW - PROBE
U2 - 10.1093/mnras/stab2128
DO - 10.1093/mnras/stab2128
M3 - Journal article
VL - 506
SP - 6063
EP - 6080
JO - Royal Astronomical Society. Monthly Notices
JF - Royal Astronomical Society. Monthly Notices
SN - 0035-8711
IS - 4
ER -
ID: 282472199