%0 Generic %1 koyama2017nature %A Koyama, Yusei %A Hayashi, Masao %A Tanaka, Masayuki %A Kodama, Tadayuki %A Shimakawa, Rhythm %A Yamamoto, Moegi %A Nakata, Fumiaki %A Tanaka, Ichi %A Suzuki, Tomoko %A Tadaki, Ken-ichi %A Nishizawa, Atsushi J. %A Yabe, Kiyoto %A Toba, Yoshiki %A Lin, Lihwai %A Jian, Hung-Yu %A Komiyama, Yutaka %D 2017 %K HSC Ha SSP emission filament overdensity %T The nature of H$\alpha$-selected galaxies along the huge cosmic web at z=0.4 revealed by Subaru Hyper Suprime-Cam survey %U http://arxiv.org/abs/1704.05979 %X We present the environmental dependence of colour, stellar mass, and star formation (SF) activity in H-alpha-selected galaxies along the huge cosmic web at z=0.4 hosting twin clusters in DEEP2-3 field, discovered by Subaru Strategic Programme of Hyper Suprime-Cam (HSC SSP). By combining photo-z selected galaxies and H-alpha emitters selected with broad-band and narrow-band data of the recent internal data release of HSC SSP (DR1), we confirm that galaxies in higher-density environments or galaxies in the cluster central regions show redder colours. We find that there still remains a colour-density and colour-radius correlation even if we restrict the sample to H-alpha-selected galaxies. We also find an increase of star formation rates (SFR), and possible decline in specific SFRs, amongst H-alpha emitters towards the highest-density environment, primarily driven by the excess of red/massive H-alpha emitters in high-density environment. Finally, we find a hint that pairs of H-alpha emitters located in higher-density environment show redder colours than those in underdense regions, implying that galaxy-galaxy interaction in different environments have different impacts on the properties of SF galaxies.

@misc{koyama2017nature, abstract = {We present the environmental dependence of colour, stellar mass, and star formation (SF) activity in H-alpha-selected galaxies along the huge cosmic web at z=0.4 hosting twin clusters in DEEP2-3 field, discovered by Subaru Strategic Programme of Hyper Suprime-Cam (HSC SSP). By combining photo-z selected galaxies and H-alpha emitters selected with broad-band and narrow-band data of the recent internal data release of HSC SSP (DR1), we confirm that galaxies in higher-density environments or galaxies in the cluster central regions show redder colours. We find that there still remains a colour-density and colour-radius correlation even if we restrict the sample to H-alpha-selected galaxies. We also find an increase of star formation rates (SFR), and possible decline in specific SFRs, amongst H-alpha emitters towards the highest-density environment, primarily driven by the excess of red/massive H-alpha emitters in high-density environment. Finally, we find a hint that pairs of H-alpha emitters located in higher-density environment show redder colours than those in underdense regions, implying that galaxy-galaxy interaction in different environments have different impacts on the properties of SF galaxies.}, added-at = {2017-04-21T10:30:17.000+0200}, author = {Koyama, Yusei and Hayashi, Masao and Tanaka, Masayuki and Kodama, Tadayuki and Shimakawa, Rhythm and Yamamoto, Moegi and Nakata, Fumiaki and Tanaka, Ichi and Suzuki, Tomoko and Tadaki, Ken-ichi and Nishizawa, Atsushi J. and Yabe, Kiyoto and Toba, Yoshiki and Lin, Lihwai and Jian, Hung-Yu and Komiyama, Yutaka}, biburl = {https://www.bibsonomy.org/bibtex/25c493d791d6c812ecc30fb6d97a79d34/miki}, description = {[1704.05979] The nature of H$\alpha$-selected galaxies along the huge cosmic web at z=0.4 revealed by Subaru Hyper Suprime-Cam survey}, interhash = {93467470a0b22cba1f8adfd79cc84468}, intrahash = {5c493d791d6c812ecc30fb6d97a79d34}, keywords = {HSC Ha SSP emission filament overdensity}, note = {cite arxiv:1704.05979Comment: 15 pages, 13 figures, submitted to PASJ for publication in the HSC-SSP special issue}, timestamp = {2017-04-21T10:30:17.000+0200}, title = {The nature of H$\alpha$-selected galaxies along the huge cosmic web at z=0.4 revealed by Subaru Hyper Suprime-Cam survey}, url = {http://arxiv.org/abs/1704.05979}, year = 2017 }