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Cosmic Evolution Survey COSMOS

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Title: Cosmic Evolution Survey COSMOS


1
Cosmic Evolution Survey (COSMOS) w/ Hubble
Telescope
image 2 deg.2 ! 590 orbits in Cy 12-13
VLT-VIMOS, XMM, Subaru, VLA, Galex,
2 million gal. (z gt 0.5) (like SDSS)
  • rational for survey
  • major multi-wavelength components
  • identification of structures
  • galaxy evolution vs z and environment
  • future directions

first HST data release
2
  • Major features
  • large area -- 9xGEMS
  • gt cover largest large scale structures
  • high sensitivity ( I gt 27 mag, 10?)
  • gt morphology of L galaxies at z lt 2
  • sensitivity area
  • gt 2x106 galaxies , unusual objects at
    higher z
  • equatorial gt multi-? observations from all tel.

3
COSMOS -- team collaborators
Colin Norman Alexandre Refregier Alvio
Renzini Jason Rhodes Mike Rich Dave
Sanders Shunji Sasaki Dave Schminovich Eva
Schinnerer Nick Scoville Marco Scodeggio Kartik
Sheth Patrick Shopbell James Taylor Dave
Thompson Neil Tyson Meg Urry Yoshi
Taniguchi Ludovic Van Waerbeke Paolo
Vettolani Simon White Lin Yan
Alberto Franceschini Mauro Giavalisco Richard
Griffiths Gigi Guzzo Gunther Hasinger Chris
Impey Jean-Paul Kneib Karel Nel Jin Koda Anton
Koekemoer Alexie Leauthaud Olivier LeFevre Ingo
Lehmann Simon Lilly Thorsten Lisker Charles
Liu Richard Massey Henry McCracken Yannick
Mellier Satoshi Miyazaki Bahram Mobasher Takashi
Murayama
Roberto Abraham Masaru Ajiki Justin Alpert Herve
Aussel Josh Barnes Andrew Blain Daniela
Calzetti Peter Capak John Carlstrom Chris
Carilli Andrea Cimatti Andrea Comastri Marcella
Corollo Emannuel Daddi Richard Ellis Martin
Elvis Amr El Zant Shawn Ewald Mike Fall Alexis
Finoguenov
4
redshift slice from ? CDM sim.
Frenk etal
5
Extremely large samples w/I 2 deg2
6
COSMOS multi-?
7
ACS
270 orbits 5/14/04
ACS I-band
1.4 deg
270 orbits as of 6/15
NICMOS-3 1.6 ?m -- 24mag 7 of area
8
Subaru 1.5x1.5 deg 0.7'' res.
Full subaru mosaic
2x106 gal.
gt 18 bands for phot-z
9
Subaru -- deep multi-color opt. imaging
pi Y. Taniguchi
  • 10n in 04 , 15n in 05
  • full 2 deg2 covered to 25-27 mag in 18 bands

gt PHOTO-Z w/ ?Z 0.03 to 0.1
photo-z (Subaru BVRIZ, CFHT U, NOAO K)
gt dz/(1z) 0.1 , ultimately to 0.03
current photo-z catalog at IAB lt 25 gt
860,000 galaxies
10
  • Structures/Cluster identification
  • wavelets (Finoguenov)
  • adaptive smoothing (Scoville)
  • both techniques avoid a priori assumptions
  • w.r.t. shapes and sizes
  • can select all types of gal. or just early types
    (easier)

11
Redshift slices
stuctures from over-densities gt
12
adaptive smoothing w/ res. determined by local SNR
Z 0.3 -- 0.4 all SED types
13
Wavelet analysis - Finoguenov etal
most structures show up in XMM diffuse emission
gt clusters
14
Galaxy groups w/ XMM at z gt 0.5 ACS images
15
LSS structures from adaptive smoothing 30
massesSED up to 1014Msun sizes up to 10 Mpc
3d cube
16
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17
Galaxy/LSS Evolution gt environmental
dependence
Galaxy types morphology
visual classification
concentration/assymetry,
etc spectral energy
distribution (SED from photz)
Environment defined structures
n-th nearest neighbor separation
18
Elliptical fraction
COSMOS solid pts
others Smith etal, Postman etal, Dressler
gt at all Z , Es fraction higher at high
density gt evolution earlier at high density
Capak etal
19
COSMOS environment ltgt evolution
luminous early-type gt dense core of LSS
20
Z 0.75 cluster
XMM contours
shear map
21
Adaptive smoothing
spatial filtering/smoothing w/ filter width lt
local SNR
  • specify desired local SNR, increase filter width
    to reach this
  • no filtering where SB high gt retain high res.
  • smooth up to 2'' at low SB gt detect faint,
    extended gal.

applied to picking out large structures enhance
imaging
e.g.
22
COSMOS -- lens
smoothing w/ same stretch
23
0.56
Z 0.77
1.34 (?)
COSMOS ACS I
24
COSMOS major components HST (cycle 12
13) Galex deep VLA (A C array) Fall
04 Subaru imaging 04/05 (25 n) VLT
Magellan spectroscopy XMM
all underway !
need for LSS context, large area and multi-? !
COSMOS will be a fundamental resource for
cosmology
25
Future Subaru COSMOS-18 gt improved
phot-z
emission line survey HST-ACS - g band
(to be proposed) Spitzer IRAC MIPS (to be
proposed) NOAO, UH88, UKIRT -- deeper J,H, K
26
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27
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28
Cosmology Field IR Backgrounds (Mjy/sr)
8?m 24?m
w/i 2x of very best fields
COSMOS equatorial gt instruments N S
VLA ALMA
29
ALMA -- combined w/ VLA other COSMOS
multi-wave surveys ALMA gt ISM , far
infrared/submm , dynamical masses
w/ subarcsec res.
Equatorial COSMOS field chosen to enable both VLA
and ALMA
30
COSMOS
http//cosmos.astro.caltech.edu/
Cycle 12 COSMOS Data Release
http//irsa.ipac.caltech.edu/COSMOS/
(also MAST in future)
31
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32
XMM
red -- 0.5-2 kev
green -- 2-4.5 kev
blue -- 4.5-10kev
339 sources detected
33
GALEX -- UV Schminovich Martin etal
1.5 deg 200 ks
50,000 UV obj w/ mABlt 25 1750-3000Å 1300-1750Å
34
Early type galaxies only
Z 0.6 -- 0.7
Z 0.8 -- 0.9
wavelet gt
35
gt need resolved colors
36
Need 2-colors w/ ACS central 3x3 mosaic has I
g bands
37
original g I
adaptively smoothed
38
Z 0.75 cluster
galaxy density
XMM contours
shear maps
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