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9 papers · 2 filters
The Hubble Space Telescope Cluster Supernova Survey: II. The Type Ia Supernova Rate in High-Redshift Galaxy Clusters
K. Barbary, G. Aldering, R. Amanullah +40
We report a measurement of the Type Ia supernova (SN Ia) rate in galaxy clusters at 0.9 < z < 1.45 from the Hubble Space Telescope (HST) Cluster Supernova Survey. This is the first…
Lyman Alpha Emitters at z=7 in the Subaru/XMM-Newton Deep Survey Field: Photometric Candidates and Luminosity Function
Kazuaki Ota, Masanori Iye, Nobunari Kashikawa +11
We conducted a deep narrowband NB973 (FWHM = 200 A centered at 9755 A) survey of z=7 Lyman alpha emitters (LAEs) in the Subaru/XMM-Newton Deep Survey Field, using the fully deplete…
Spitzer Space Telescope Constraint on the Stellar Mass of a z = 6.96 Lyman Alpha Emitter
Kazuaki Ota, Chun Ly, Matthew A. Malkan +7
We obtained mid-infrared 3.6 and 4.5 micron imaging of a z=6.96 Lyman alpha emitter (LAE) IOK-1 discovered in the Subaru Deep Field, using Spitzer Space Telescope Infrared Array Ca…
A Large Number of z > 6 Galaxies around a QSO at z = 6.43: Evidence for a Protocluster?
Yousuke Utsumi, Tomotsugu Goto, Nobunari Kashikawa +4
QSOs have been thought to be important for tracing highly biased regions in the early universe, from which the present-day massive galaxies and galaxy clusters formed. While overde…
A Spectropolarimetric Test of the Structure of the Intrinsic Absorbers in the Quasar HS1603+3820
T. Misawa, K. S. Kawabata, M. Eracleous +2
We report the results of a spectropolarimetric observation of the C IV mini-BAL in the quasar HS1603+3820. The observations were carried out with the FOCAS instrument on the Subaru…
Statistics of 207 Lya Emitters at a Redshift Near 7: Constraints on Reionization and Galaxy Formation Models
Masami Ouchi, Kazuhiro Shimasaku, Hisanori Furusawa +12
We present Lya luminosity function (LF), clustering measurements, and Lya line profiles based on the largest sample, to date, of 207 Lya emitters (LAEs) at z=6.6 on the 1-deg^2 sky…