Transcript Document

FMOS で探る Extremely Red Universe II.
Extremely Red Universe Probed with
FMOS
Toru Yamada
(NAOJ)
Suprime-Cam/UKIDSS DXS 10 deg2 Imaging Survey
Wide-field optical imaging at the two northern DXS fields
(Lockman Hole, ELIAS N1) with Suprime-Cam
w/ T.Futamase, M.Kajisawa, T.Kodama, H.Matsuhara, K.Ohta, K.Sekiguchi,
Y.Taniguchi, K.Umetzu, and T.Wada
and UKIDSS DXS team
Targets for FMOS
☆ Extremely-Red Objects
☆ Multi-wavelength sample
☆ NIR-selected sample
UKIDSS DXS (→ Edge san’s talk)
Northern Fields
Lockman Hole
ELIAS N1
K<21 J<22.5
Suprime-Cam Wide-Field Imaging Survey
I < 26 mag 10 deg2 (40 FOV of Scam ) 10 nights
Lockman Hole (11h)
ELIAS N1
Field Configuration: TBD
Bkg:SWIRE
ERO / HERO selected in UKIDSS DXS
☆ Trivial targets for FMOS
☆ They may be:
Old Passive Galaxies at z=1-3
Dusty Star-Forming Galaxy at z > 1
Dusty AGN at High and Intermediate Redshift
~104 Dusty EROs
Mannucci (2001)
This works at z~1.5
(But maybe not at z~2)
ERO / HERO selected in UKIDSS DXS
IJK SED/photometric redshift
e.g., I-K>4 (for K=21, I > 25 data is needed)
J-K>2
☆ Trivial targets for FMOS
☆ They may be:
Old Passive Galaxies at z=1-3
Dusty Star-Forming Galaxy at z > 1
Dusty AGN at High and Intermediate Redshift
Passive Old Galaxies at 1 < z < 3
Model SED:
Kodama et al. (1998)
Coma Metal Sequence
models
z=3
z=2
Conspicuous red colors
at z=1-3
Number Density and Spatial Distribution
of Old Passive Galaxies
Color Selection … Pure photometric
easy to observe, easy to model
Oldest galaxies are always Reddest at any redshift
tracing morphological transformation is very difficult
★ Constraint for stellar formation epoch of the oldest galaxies
★ Study galaxy formation bias using the oldest galaxies
★ Search for massive clusters or their progenitors at z=1-3
Wide Field … Fair sample of the universe
Search for rare objects (massive clusters, ULIRG)
High statistical accuracy
FMOS
… Confirmation/Calibration of Redshift Distribution
53W002 field
Model: z(obs)=2.4
Yamada et al. 2001
K=20
5L*
J-K=2
Franx et al. (2003) HDF-S
Ks < 22.5
Results at z~1 from SXDS
w/ Kodama, Akiyama, Iye, Karoji, Noumaru, Sasaki, Simpson, SXDS team
R-z
i-z
SXDS: B<28, R < 27, I< 26.5, z<25.5 (AB)
1.2 sq. deg
Redshift
Z’ mag
1.3度
XMM 100 ksec (center)
50 ksec x 6
Subaru Suprime Cam 1.2 deg2
B(28.) V(26.) R(27.) I’(26.5) z’(25.5)
SXDS z’-band selected objects
Color distribution
Z-selected objects
0.8 < i-z < 1.2
Old Passive Galaxies in SXDS Field (z’AB<23)
Redshift Distribution of the Obejects Selected by Color Criteria
For Old Passive Galaxies
Z < 22
All
Redshift Disribution
Vs. magnitude and colors
5L*, zf=5
5L*, zf=3
FMOS 10h simulated spectra for 1Gyr Elliptical
Observed at z=2
H=21 (K~20)
H=22 (K~21)
Finding Proto-Clusters at z=1-3
Massive Clusters (or their high-z progenitors) Are Rare !
Lx ~ 2 x 1044 erg/s => 10-7 Mpc-3
10 sq. deg.
1<z<3
~10 clusters
w/ Lx > 1044 erg/s
at z=0
~100 clusters
w/ Lx > 1043 erg/s
at z=0
Need Large Area !
Z=0 X-ray LF of clusters
Proto-cluster seen in Lyα Emission Line
emitters
2 x 10-17 erg/s/cm2
EWobs > 170 Å
absorbers
A sample of
extended
objects
Suprime-Cam 7h narrow-band imaging @497 nm
Hayashino, Matsuda, Tamura, TY et al. 2004
‘Proto-cluster’ at z=3.1 (Steidel et al. 1998)
Selection of ‘extended’ Ｌｙα emitters (II)
Matsuda, TY, et al. (2004)
35 objects !
16 arcsec2
>7σ
in isophotal aperture
robust !
d~30kpc
S00 blob1
25”
S00 blob2
Weak Lensing Cluster Search
Umetsu et al.
Summary
☆ We are conducting Suprime-Cam/UKIDSS DXS 10 deg2 Imaging Survey
Two Northern Field (Lockman Hole, ELIAS N1)
1st run 2 nights in March 2004 Scheduled
2nd run 5 nights in April/May 2004 Proposed
UKIDSS DXS J<22.5 K<21
Subaru Suprime Cam I < 26 (z’<25 in the future)
Unique sample of ERO (I-K>4) / HERO (J-K>2)
=> 104 dusty starbursts at z > 1
=> Old Passive Galaxies at z=1-3
 FMOS Spectroscopy
SF/AGN activities in dusty ERO/HERO
Number density of old passive galaxies at z=1-3
Identification of clusters/proto-clusters at z =1-3