The Build-up of the Red Sequence at z
description
Transcript of The Build-up of the Red Sequence at z
![Page 1: The Build-up of the Red Sequence at z](https://reader035.fdocuments.in/reader035/viewer/2022070410/56814568550346895db239b9/html5/thumbnails/1.jpg)
The Build-up of the Red Sequence at z<1.3
Masayuki Tanaka (ESO, not STScI)
+
Taddy Kodama (NAOJ)
![Page 2: The Build-up of the Red Sequence at z](https://reader035.fdocuments.in/reader035/viewer/2022070410/56814568550346895db239b9/html5/thumbnails/2.jpg)
galaxies come in two flavours...red
blue
bright faint
![Page 3: The Build-up of the Red Sequence at z](https://reader035.fdocuments.in/reader035/viewer/2022070410/56814568550346895db239b9/html5/thumbnails/3.jpg)
Conclusion
• The bright end of the red sequence appears first and it extends to fainter mags., and the build-up of the red sequence is ‘delayed’ in low density environments.
• Galaxy-galaxy interactions may be a primary driver of this build-up.E
nvi
ron
men
t
Mas
s
![Page 4: The Build-up of the Red Sequence at z](https://reader035.fdocuments.in/reader035/viewer/2022070410/56814568550346895db239b9/html5/thumbnails/4.jpg)
Outline of this talk
0 – Introduction
1 – PISCES project
2 – Large-scale structures around distant clusters
3 – Build-up of the red sequence at z<1.3
4 – Spectral Diagnostics
5 – Summary
![Page 5: The Build-up of the Red Sequence at z](https://reader035.fdocuments.in/reader035/viewer/2022070410/56814568550346895db239b9/html5/thumbnails/5.jpg)
large-scale structure in the local
universe
0 – Introduction
outline
0 – introduction
1 – pisces prject
2 – large-scale structures in the distant
universe
3 – the build-up of the colour-magnitude
relation
4 – spectral diagnostics
5 – summary
![Page 6: The Build-up of the Red Sequence at z](https://reader035.fdocuments.in/reader035/viewer/2022070410/56814568550346895db239b9/html5/thumbnails/6.jpg)
Galaxies in low-density
environments...
NGC5668
![Page 7: The Build-up of the Red Sequence at z](https://reader035.fdocuments.in/reader035/viewer/2022070410/56814568550346895db239b9/html5/thumbnails/7.jpg)
Galaxies in high-density
environments...
Coma
cluster
![Page 8: The Build-up of the Red Sequence at z](https://reader035.fdocuments.in/reader035/viewer/2022070410/56814568550346895db239b9/html5/thumbnails/8.jpg)
Clusters at higher redshifts
CL0016 at z=0.55 taken with WFPC2 on
HST
![Page 9: The Build-up of the Red Sequence at z](https://reader035.fdocuments.in/reader035/viewer/2022070410/56814568550346895db239b9/html5/thumbnails/9.jpg)
?
?
?
?
?
Clusters at higher redshifts
CL0016 at z=0.55 taken with WFPC2 on
HST
Cluster outskirts and surrounding
clumps/filaments remain unexplored.
Also, faint galaxies at high redshifts have not
been extensively examined yet.
We carried out a wide and deep cluster
survey.
![Page 10: The Build-up of the Red Sequence at z](https://reader035.fdocuments.in/reader035/viewer/2022070410/56814568550346895db239b9/html5/thumbnails/10.jpg)
1 – PISCES projectoutline
1 – pisces project
2 – large-scale structures around distant
clusters
3 – the build-up of the red sequence
4 – spectral diagnostics
5 – summary
Pi·sces [pahy-seez, pis-eez]
-n. 1. A constellation in the equatorial region of the Northern Hemisphere
near Aries and Pegasus. Also called Fishes.
2. a. The 12th sign of the zodiac in astrology. Also called Fishes.
b. pl. Pisces One who is born under this sign.
3. A deep, wide-field survey of galaxy clusters at 0.4<z<1.3.
![Page 11: The Build-up of the Red Sequence at z](https://reader035.fdocuments.in/reader035/viewer/2022070410/56814568550346895db239b9/html5/thumbnails/11.jpg)
PISCES project (in A&A abstract format)
For details, see Kodama+ 2005 PASJ, 57, 309
Aims:
Methods:
Results:
Conclusions:
Our goal is to quantify galaxy properties as functions of
environment, mass, and time and understand how and when the
environmental dependence of galaxy properties is established.
We carry out a systematic, deep (~M*+4), wide-field (30’x30’),
optical-nearIR imaging + spectroscopic survey of distant clusters.
Some of our recent results are presented in this talk.
Our survey is not finished yet, so…..we will see.
![Page 12: The Build-up of the Red Sequence at z](https://reader035.fdocuments.in/reader035/viewer/2022070410/56814568550346895db239b9/html5/thumbnails/12.jpg)
ACS/
HST
CL0016+16 at z=0.55
BVRiz photometry + 150 spec. objects
![Page 13: The Build-up of the Red Sequence at z](https://reader035.fdocuments.in/reader035/viewer/2022070410/56814568550346895db239b9/html5/thumbnails/13.jpg)
RXJ1716 at z=0.81
VRizK, H photometry + AKARI IR photometry
![Page 14: The Build-up of the Red Sequence at z](https://reader035.fdocuments.in/reader035/viewer/2022070410/56814568550346895db239b9/html5/thumbnails/14.jpg)
RXJ0152-13 at z=0.83
VRizK photometry + 200 spec. objects
![Page 15: The Build-up of the Red Sequence at z](https://reader035.fdocuments.in/reader035/viewer/2022070410/56814568550346895db239b9/html5/thumbnails/15.jpg)
RDCSJ0910 at z=1.1
VRizK photometry + some spec. objects
![Page 16: The Build-up of the Red Sequence at z](https://reader035.fdocuments.in/reader035/viewer/2022070410/56814568550346895db239b9/html5/thumbnails/16.jpg)
RDCSJ1252 at z=1.24
VRizK photometry + some spec. objects
![Page 17: The Build-up of the Red Sequence at z](https://reader035.fdocuments.in/reader035/viewer/2022070410/56814568550346895db239b9/html5/thumbnails/17.jpg)
2 – Large-scale structures
around distant clusters
outline
1 – pisces project
2 – large-scale structures around distant
clusters
3 – the build-up of the red sequence
4 – spectral diagnostics
5 – summary
Large-scale structure in the local Universe
![Page 18: The Build-up of the Red Sequence at z](https://reader035.fdocuments.in/reader035/viewer/2022070410/56814568550346895db239b9/html5/thumbnails/18.jpg)
~70,700 objects~3,600 objects
0.48<zphot<0.60
Large-Scale Structures at z=0.55
CL0016 at z=0.55 (Tanaka+ MNRAS, 2007, 379, 1546)
![Page 19: The Build-up of the Red Sequence at z](https://reader035.fdocuments.in/reader035/viewer/2022070410/56814568550346895db239b9/html5/thumbnails/19.jpg)
~3,600 objects
0.48<zphot<0.60
Large-Scale Structures at z=0.55cluster redshift
CL0016 at z=0.55 (Tanaka+ MNRAS, 2007, 379, 1546)
![Page 20: The Build-up of the Red Sequence at z](https://reader035.fdocuments.in/reader035/viewer/2022070410/56814568550346895db239b9/html5/thumbnails/20.jpg)
Large-Scale Structures at z=0.83
RXJ0153 at z=0.83Tanaka+ 2006 MNRAS, 365, 13920.76<zphot<0.88
red galaxies
blue galaxies
![Page 21: The Build-up of the Red Sequence at z](https://reader035.fdocuments.in/reader035/viewer/2022070410/56814568550346895db239b9/html5/thumbnails/21.jpg)
Redshift distribution of spec. galaxies
0.76<zphot<0.88
cluster redshift
RXJ0153 at z=0.83Tanaka+ 2006 MNRAS, 365, 1392
![Page 22: The Build-up of the Red Sequence at z](https://reader035.fdocuments.in/reader035/viewer/2022070410/56814568550346895db239b9/html5/thumbnails/22.jpg)
RXJ0153 at z=0.83
Large-Scale Structures at z=0.83
z=0.844
z=0.842
z=0.745z=0.782
z=0.835
z=0.837
z=0.839
z=0.844
spec. objects at
0.82<z<0.85
0.76<zphot<0.88
![Page 23: The Build-up of the Red Sequence at z](https://reader035.fdocuments.in/reader035/viewer/2022070410/56814568550346895db239b9/html5/thumbnails/23.jpg)
Large-Scale Structures at z=1.1
RDCSJ0910 at z=1.1
![Page 24: The Build-up of the Red Sequence at z](https://reader035.fdocuments.in/reader035/viewer/2022070410/56814568550346895db239b9/html5/thumbnails/24.jpg)
RDCSJ1252 at z=1.24
Tanaka+ 2007a MNRAS, 377, 1206
Large-Scale Structures at z=1.2
1.17<zphot<1.31
![Page 25: The Build-up of the Red Sequence at z](https://reader035.fdocuments.in/reader035/viewer/2022070410/56814568550346895db239b9/html5/thumbnails/25.jpg)
Close-up views of the clumps
![Page 26: The Build-up of the Red Sequence at z](https://reader035.fdocuments.in/reader035/viewer/2022070410/56814568550346895db239b9/html5/thumbnails/26.jpg)
3 – Build-up of the red sequenceoutline
1 – pisces project
2 – large-scale structures around distant
clusters
3 – the build-up of the red sequence
4 – spectral diagnostics
5 – summary
galaxies come in two flavours...red
blue
bright faint
![Page 27: The Build-up of the Red Sequence at z](https://reader035.fdocuments.in/reader035/viewer/2022070410/56814568550346895db239b9/html5/thumbnails/27.jpg)
Cluster / Group / Field Environments
For details of the definition, refer to Tanaka+2005 MNRAS
![Page 28: The Build-up of the Red Sequence at z](https://reader035.fdocuments.in/reader035/viewer/2022070410/56814568550346895db239b9/html5/thumbnails/28.jpg)
Colour-Magnitude Diagrams at z<0.83
blue
red
faintbright
Tanaka+ 2005 MNRAS, 362, 268
![Page 29: The Build-up of the Red Sequence at z](https://reader035.fdocuments.in/reader035/viewer/2022070410/56814568550346895db239b9/html5/thumbnails/29.jpg)
Evolution of Fraction of red galaxies
![Page 30: The Build-up of the Red Sequence at z](https://reader035.fdocuments.in/reader035/viewer/2022070410/56814568550346895db239b9/html5/thumbnails/30.jpg)
Color-Magnitude Diagrams at z=0.81
RXJ1716 cluster surrounding field
Koyama et al. 2007 MNRAS submitted.
![Page 31: The Build-up of the Red Sequence at z](https://reader035.fdocuments.in/reader035/viewer/2022070410/56814568550346895db239b9/html5/thumbnails/31.jpg)
Colour-Magnitude Diagrams at z=1.1 (preliminary!)
RDCSJ0910 at z=1.1
![Page 32: The Build-up of the Red Sequence at z](https://reader035.fdocuments.in/reader035/viewer/2022070410/56814568550346895db239b9/html5/thumbnails/32.jpg)
Colour-Magnitude Diagrams at z=1.2
Main Cluster
Lidman et al. 2004 A&A
Composite Group
Tanaka et al. 2007a MNRAS
18 20 22 24 26
Ks
18 20 22 24
Ks
RDCSJ1252 at z=1.24
![Page 33: The Build-up of the Red Sequence at z](https://reader035.fdocuments.in/reader035/viewer/2022070410/56814568550346895db239b9/html5/thumbnails/33.jpg)
Colour-Magnitude Diagrams at z=1.2
Main Cluster
Lidman et al. 2004 A&A
Composite Clump
Tanaka et al. 2007a MNRAS
1 – The bright-end of the red sequence appears first
and the faint end appears later.
2 – The build-up of the red sequence is ‘delayed’
in low-density environments.
![Page 34: The Build-up of the Red Sequence at z](https://reader035.fdocuments.in/reader035/viewer/2022070410/56814568550346895db239b9/html5/thumbnails/34.jpg)
4 – Spectral Diagnosticsoutline
1 – pisces project
2 – large-scale structures around distant
clusters
3 – the build-up of the red sequence
4 – spectral diagnostics
5 – summary
z=1.24
z=1.1
z=0.83
z=0.81
z=0.55
z=0
: RDCSJ1252
: RDCSJ0910
: RXJ0152
: RXJ1716
: CL0016
: Sloan Survey
![Page 35: The Build-up of the Red Sequence at z](https://reader035.fdocuments.in/reader035/viewer/2022070410/56814568550346895db239b9/html5/thumbnails/35.jpg)
composite spectra of red galaxies at z~0.8
![Page 36: The Build-up of the Red Sequence at z](https://reader035.fdocuments.in/reader035/viewer/2022070410/56814568550346895db239b9/html5/thumbnails/36.jpg)
composite spectra of red galaxies at z~0.5
![Page 37: The Build-up of the Red Sequence at z](https://reader035.fdocuments.in/reader035/viewer/2022070410/56814568550346895db239b9/html5/thumbnails/37.jpg)
composite spectra of red galaxies at z=0
![Page 38: The Build-up of the Red Sequence at z](https://reader035.fdocuments.in/reader035/viewer/2022070410/56814568550346895db239b9/html5/thumbnails/38.jpg)
Spectral Diagnostics
...for details see Tanaka+07 MNRAS, 379, 1546
![Page 39: The Build-up of the Red Sequence at z](https://reader035.fdocuments.in/reader035/viewer/2022070410/56814568550346895db239b9/html5/thumbnails/39.jpg)
Spectral Diagnostics
Redshift Field Group Cluster z~0.8
z~0.5
z~0
No clear CMR CMR at bright end Tight CMR
CMR at bright end Tight CMR Tight CMR
Red galaxies are consistent with passive evolution
no [OII], no strong Hd
EW[OII]=14A EW[OII]=4A No [OII]
EW[OII]=4A No [OII] No [OII]
No strong Hd Strong Hd No strong Hd
Strong Hd No strong Hd No strong Hd
The strong Hd is suggestive of a sharp decline in star formation rates.
![Page 40: The Build-up of the Red Sequence at z](https://reader035.fdocuments.in/reader035/viewer/2022070410/56814568550346895db239b9/html5/thumbnails/40.jpg)
Fast Facts of Environmental Mechanisms
galaxy-galaxy interactions <<1Gyr field/group
harassment ? cluster
ram-pressure stripping <<1Gyr cluster
strangulation ~1Gyr group/cluster
mechanisms star formation effective env.
![Page 41: The Build-up of the Red Sequence at z](https://reader035.fdocuments.in/reader035/viewer/2022070410/56814568550346895db239b9/html5/thumbnails/41.jpg)
Fast Facts of Environmental Mechanisms
galaxy-galaxy interactions <<1Gyr field/group
harassment ? cluster
ram-pressure stripping <<1Gyr cluster
strangulation ~1Gyr group/cluster
mechanisms star formation effective env.
For more detailed discussions, see Tanaka+ 2007 MNRAS, 379, 1546
![Page 42: The Build-up of the Red Sequence at z](https://reader035.fdocuments.in/reader035/viewer/2022070410/56814568550346895db239b9/html5/thumbnails/42.jpg)
5 – Summaryoutline
1 – pisces project
2 – large-scale structures around distant
clusters
3 – the build-up of the red sequence
4 – spectral diagnostics
5 – summary
Ein Prosit, ein Prosit der Gemütlichkeit!
Ein Prosit, ein Prosit der Gemütlichkeit!
![Page 43: The Build-up of the Red Sequence at z](https://reader035.fdocuments.in/reader035/viewer/2022070410/56814568550346895db239b9/html5/thumbnails/43.jpg)
Summary
Galaxies follow the 'environment-dependent down-sizing' evolution.
Galaxy-galaxy interactions may be the driving process of this
evolution.E
nvi
ron
men
t
Mas
s