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Related papers: Environmental Effects on the Star Formation Activi…

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We investigate the relation between the star-formation activity in galaxies and environment at z=1.2 in the COSMOS field, using the fraction of [OII] emitters and the local galaxy density. The fraction of [OII] emitters appears to be almost…

In order to understand environmental effects on star formation in high-redshift galaxies, we investigate the physical relationships between the star formation activity, stellar mass, and environment for z ~1.2 galaxies in the 2 deg^2 COSMOS…

We present the first detailed study of the stellar populations of star-forming galaxies at z~1.5, which are selected by their [O II] emission line, detected in narrow-band surveys. We identified ~1,300 [O II] emitters at z=1.47 and z=1.62…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-05 Chun Ly , Matthew A. Malkan , Nobunari Kashikawa , Masao Hayashi , Tohru Nagao , Kazuhiro Shimasaku , Kazuaki Ota , Nathaniel R. Ross

We investigate the relationship between H\alpha\ and [OII](\lambda 3727) emission in faint star-forming galaxies at z=1.47 with dust uncorrected star formation rates (SFRs) down to 1.4 Msun/yr, using data in two narrow-bands from…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-12 Masao Hayashi , David Sobral , Philip N. Best , Ian Smail , Tadayuki Kodama

We present results from Subaru/FMOS near-infrared (NIR) spectroscopy of 118 star-forming galaxies at $z\sim1.5$ in the Subaru Deep Field. These galaxies are selected as [OII]$\lambda$3727 emitters at $z\approx$ 1.47 and 1.62 from…

[ABRIDGED] We present spectroscopic observations of 466 galaxies in and around a superstructure at $z\sim0.84$ targeted by the VIMOS Spectroscopic Survey of a Supercluster in the COSMOS field (VIS$^{3}$COS). We use [OII]$\lambda$3727,…

Astrophysics of Galaxies · Physics 2020-01-15 Ana Paulino-Afonso , David Sobral , Behnam Darvish , Bruno Ribeiro , Ian Smail , Philip Best , Andra Stroe , Joseph Cairns

We explore the morphological features and star formation activities of [OII] emitters in the COSMOS UltraDeep field at $z \sim 1.5$ using JWST NIRCam data from the COSMOS-Web survey and Subaru Hyper Suprime-Cam. We also report the discovery…

Astrophysics of Galaxies · Physics 2024-03-13 Ronaldo Laishram , Tadayuki Kodama , Takahiro Morishita , Andreas Faisst , Yusei Koyama , Naoaki Yamamoto

We present a pilot narrow-band survey of H-alpha emitters at z=2.2 in the Great Observatories Origins Deep Survey North (GOODS-N) field with MOIRCS instrument on the Subaru telescope. The survey reached a 3 sigma limiting magnitude of 23.6…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-20 Ken-ichi Tadaki , Tadayuki Kodama , Yusei Koyama , Masao Hayashi , Ichi Tanaka , Chihiro Tokoku

We investigate the evolution of the star formation rate in cluster galaxies. We complement data from the CNOC1 cluster survey (0.15<z<0.6) with measurements from galaxy clusters in the 2dF galaxy redshift survey (0.05<z<0.1) and…

Astrophysics · Physics 2009-11-10 Fumiaki Nakata , Richard G. Bower , Michael L. Balogh , David J. Wilman

We study how the proportion of star-forming galaxies evolves between z=0.8 and z=0 as a function of galaxy environment, using the [OII] line in emission as a signature of ongoing star formation. Our high-z dataset comprises 16 clusters, 10…

We have carried out a wide-field imaging survey for [OII]3727 emitting galaxies at z~1.2 in the HST COSMOS 2 square degree field using the Suprime-Cam on the Subaru Telescope. The survey covers a sky area of 6700 arcmin^2 in the COSMOS…

Star-forming galaxies at $z > 1$ exhibit significantly different properties to local galaxies of equivalent stellar mass. Not only are high-redshift star-forming galaxies characterized by higher star formation rates and gas fractions than…

Astrophysics of Galaxies · Physics 2016-11-07 Melanie Kaasinen , Fuyan Bian , Brent Groves , Lisa Kewley , Anshu Gupta

The global star formation rates (SFR) of galaxies at fixed stellar masses increase with redshift and are known to vary with environment unto z~2. We explore here whether the changes in the star formation rates can also apply to the electron…

We conduct a narrow-band imaging survey of [OII] emitters over a 32'x23' area in and around the XMMXCS J2215.9-1738 cluster at z=1.46 with Subaru/Suprime-Cam, and select 380 [OII] emitting galaxies down to 1.4E-17 erg/s/cm2. Among them, 16…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-27 Masao Hayashi , Tadayuki Kodama , Yusei Koyama , Ken-ichi Tadaki , Ichi Tanaka

We present a spectroscopically-selected [OIII]+Hb emitters catalogue at 6.75<z<9.05 and the resulting [OIII] 5008 \AA Luminosity Function (LF) in the COSMOS field. We leverage the 0.3 deg$^{2}$ covered to date by COSMOS-3D using NIRCam/WFSS…

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) SSP survey. We use [OII] emitters identified using two narrow-band (NB) filters,…

Astrophysics of Galaxies · Physics 2021-10-22 Teppei Okumura , Masao Hayashi , I-Non Chiu , Yen-Ting Lin , Ken Osato , Bau-Ching Hsieh , Sheng-Chieh Lin

We present a panoramic narrow-band imaging survey of [OII] emitters in and around the ClG J0218.3-0510 cluster at z=1.62 with Suprime-Cam on Subaru telescope. 352 [OII] emitters were identified on the basis of narrow-band excesses and…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-04 Ken-ichi Tadaki , Tadayuki Kodama , Kazuaki Ota , Masao Hayashi , Yusei Koyama , Casey Papovich , Mark Brodwin , Masayuki Tanaka , Masanori Iye

We present the results of a deep, near-infrared, narrow band imaging survey at a central wavelength of 1.062 microns (FWHM=0.01 microns) in the GOODS-South field using the ESO VLT instrument, HAWK-I. The data are used to carry out the…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-27 K. D. Bayliss , R. G. McMahon , B. P. Venemans , E. V. Ryan-Weber , J. R. Lewis

We present a photometric and spectroscopic study of galaxies at 0.5<z<1 as a function of environment based on data from the zCOSMOS survey. There is a fair amount of evidence that galaxy properties depend on mass of groups and clusters, in…

Emission line galaxies (ELGs) are used in several ongoing and upcoming surveys (SDSS-IV/eBOSS, DESI) as tracers of the dark matter distribution. Using a new galaxy formation model, we explore the characteristics of [OII] emitters, which…

Astrophysics of Galaxies · Physics 2017-12-27 V. Gonzalez-Perez , J. Comparat , P. Norberg , C. M. Baugh , S. Contreras , C. Lacey , N. McCullagh , A. Orsi , J. Helly , J. Humphries
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