TY - JOUR
T1 - Angular clustering and host halo properties of [O II] emitters at z > 1 in the Subaru HSC survey
AU - Okumura, Teppei
AU - Hayashi, Masao
AU - Chiu, I. Non
AU - Lin, Yen Ting
AU - Osato, Ken
AU - Hsieh, Bau Ching
AU - Lin, Sheng Chieh
N1 - Funding Information:
is grateful to Shogo Ishikawa for discussions. We also thank the anonymous referee for their careful reading and suggestions. TO w(θ) acknowledges support from the Ministry of Science and Tech-nology of Taiwan under Grant MOST 109-2112-M-001-027-and the Career Development Award, Academia Sinica (AS-CDA-108-M02) for the period 2019–2023. YTL is grateful for support from the Ministry of Science & Technology of Taiwan under grant MOST 109-2112-M-001-005 and a Career Development Award from Academia Sinica (AS-CDA-106-M01). KO is supported by JSPS Overseas Research Fellowships. This work is based on data collected at Subaru Telescope, which is operated by the National Astronomical Observatory of Japan. The Hyper Suprime-Cam (HSC) collaboration includes the astro-nomical communities of Japan and Taiwan, and Princeton Uni-versity. The HSC instrumentation and software were developed by the National Astronomical Observatory of Japan (NAOJ), the Kavli Institute for the Physics and Mathematics of the Universe (Kavli IPMU), the University of Tokyo, the High Energy Acceler-ator Research Organization (KEK), the Academia Sinica Institute for Astronomy and Astrophysics in Taiwan (ASIAA), and Princeton University. Funding was contributed by the FIRST program from the Japanese Cabinet Office, the Ministry of Education, Culture, Sports, Science and Technology (MEXT), the Japan Society for the Promo-tion of Science (JSPS), Japan Science and Technology Agency (JST), the Toray Science Foundation, NAOJ, Kavli IPMU, KEK, ASIAA, and Princeton University.
Publisher Copyright:
© 2021 Oxford University Press. All rights reserved.
PY - 2021/8/1
Y1 - 2021/8/1
N2 - We study the angular correlation function of star-forming galaxies and properties of their host dark matter halos at z > 1 using the Hyper-Suprime Cam (HSC) Subaru Stragetic Program (SSP) survey. We use [O II] emitters identified using two narrow-band (NB) filters, NB816 and NB921, in the Deep/UltraDeep layers, which respectively cover large angular areas of 16.3 deg2 and 16.9 deg2. Our sample contains 8302 and 9578 [O II] emitters at z = 1.19 (NB816) and z = 1.47 (NB921), respectively. We detect a strong clustering signal over a wide angular range, 0◦.001 < θ < 1 ◦, with bias b= 1.61+ − 0 0.. 13 11 (z = 1.19) and b= 2.09+ − 0 0.. 17 15 (z = 1.47). We also find a clear deviation of the correlation from a simple power-law form. To interpret the measured clustering signal, we adopt a halo occupation distribution (HOD) model that is constructed to explain the spatial distribution of galaxies selected by star formation rate. The observed correlation function and number density are simultaneously explained by the best-fitting HOD model. From the constrained HOD model, the average mass of halos hosting the [O II] emitters is derived to be log Meff/(h−1 M⊙) = 12.70+ − 0 0.. 09 07 and 12.61+ − 0 0.. 09 05 at z = 1.19 and 1.47, respectively, which will become halos with the present-day mass M ∼ 1.5 × 1013 h−1 M⊙. The satellite fraction of the [O II] emitter sample is found to be fsat ∼ 0.15. All these values are consistent with previous studies of similar samples, but we obtain tighter constraints even in a larger parameter space due to the larger sample size from the HSC. The results obtained for host halos of [O II] emitters in this paper enable the construction of mock galaxy catalogs and the systematic forecast study of cosmological constraints from upcoming emission line galaxy surveys such as the Subaru Prime Focus Spectrograph survey.
AB - We study the angular correlation function of star-forming galaxies and properties of their host dark matter halos at z > 1 using the Hyper-Suprime Cam (HSC) Subaru Stragetic Program (SSP) survey. We use [O II] emitters identified using two narrow-band (NB) filters, NB816 and NB921, in the Deep/UltraDeep layers, which respectively cover large angular areas of 16.3 deg2 and 16.9 deg2. Our sample contains 8302 and 9578 [O II] emitters at z = 1.19 (NB816) and z = 1.47 (NB921), respectively. We detect a strong clustering signal over a wide angular range, 0◦.001 < θ < 1 ◦, with bias b= 1.61+ − 0 0.. 13 11 (z = 1.19) and b= 2.09+ − 0 0.. 17 15 (z = 1.47). We also find a clear deviation of the correlation from a simple power-law form. To interpret the measured clustering signal, we adopt a halo occupation distribution (HOD) model that is constructed to explain the spatial distribution of galaxies selected by star formation rate. The observed correlation function and number density are simultaneously explained by the best-fitting HOD model. From the constrained HOD model, the average mass of halos hosting the [O II] emitters is derived to be log Meff/(h−1 M⊙) = 12.70+ − 0 0.. 09 07 and 12.61+ − 0 0.. 09 05 at z = 1.19 and 1.47, respectively, which will become halos with the present-day mass M ∼ 1.5 × 1013 h−1 M⊙. The satellite fraction of the [O II] emitter sample is found to be fsat ∼ 0.15. All these values are consistent with previous studies of similar samples, but we obtain tighter constraints even in a larger parameter space due to the larger sample size from the HSC. The results obtained for host halos of [O II] emitters in this paper enable the construction of mock galaxy catalogs and the systematic forecast study of cosmological constraints from upcoming emission line galaxy surveys such as the Subaru Prime Focus Spectrograph survey.
UR - http://www.scopus.com/inward/record.url?scp=85116734122&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85116734122&partnerID=8YFLogxK
U2 - 10.1093/pasj/psab068
DO - 10.1093/pasj/psab068
M3 - Article
AN - SCOPUS:85116734122
SN - 0004-6264
VL - 73
SP - 1186
EP - 1207
JO - Publication of the Astronomical Society of Japan
JF - Publication of the Astronomical Society of Japan
IS - 4
ER -