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Cosmic Evolution Survey (COSMOS) HST image 2 deg. 2 ! 590 orbits in Cy 12-13 + VLT-VIMOS, XMM,...
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Transcript of Cosmic Evolution Survey (COSMOS) HST image 2 deg. 2 ! 590 orbits in Cy 12-13 + VLT-VIMOS, XMM,...
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Cosmic Evolution Survey (COSMOS)
HST image 2 deg.2 ! 590 orbits in Cy 12-13
+ VLT-VIMOS, XMM, Subaru, VLA, Spitzer, Galex, …
• rational for survey • major multi-wavelength components• identification of structures• galaxy evolution vs z and environment
www.astro.caltech.edu/~cosmos/
Data : http://irsa.ipac.caltech.edu/COSMOS/ STScI -- MAST
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redshift slice from CDM sim.
Coupled evolution of LSS, galaxies, star formation, AGN w/ Z
90 Mpc
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Cosmos
1.4 deg.
2 million gal.
like SDSS atz = 0.5 -- 5
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COSMOS -- 38 ==> 80 team members -- US, Japan, Europe and Canada
Telescopes :
Hubble -- very fine & sensitive optical images XMM -- xray imaging Galex -- ultraviolet imaging Spitzer -- Mid IR w/ IRAC
Subaru -- multiple color imaging VeryLargeArray -- radio imaging ESO-VLT & Magellan-- opt. spec. ~ 45,000 gal. NIR -- NOAO, UH88, UKIRT …
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Roberto AbrahamMasaru AjikiJustin AlpertHerve AusselJosh BarnesAndrew BlainDaniela CalzettiPeter CapakJohn CarlstromChris CarilliAndrea CimattiAndrea ComastriMarcella CorolloEmannuel DaddiRichard EllisMartin ElvisAmr El ZantShawn EwaldMike FallAlexis FinoguenovAlberto FranceschiniMauro Giavalisco
Richard GriffithsGigi GuzzoGunther HasingerOlivier IlbertChris ImpeyKnud JahnkeJean-Paul KneibKarel NelJeyhan KartaltepeJin KodaAnton KoekemoerLisa KewleyAlexie LeauthaudOlivier LeFevreIngo LehmannSimon LillyCharles LiuRichard MasseyHenry McCrackenYannick MellierSatoshi MiyazakiBahram MobasherTakashi MurayamaColin Norman
COSMOS -- Ludovic Van WaerbekePaolo VettolaniSimon WhiteLin YanMin Yun
Alexandre RefregierAlvio RenziniJason RhodesMike RichDimitra RigopoulouMara SalvatoDave SandersShunji SasakiDave SchminovichEva SchinnererNick ScovilleMarco ScodeggioKartik ShethPatrick ShopbellVernesa SmolcicJason SuraceYoshi TaniguchiJames TaylorDave ThompsonNeil TysonMeg UrryLudovic Van Waerbeke
LSS w/Capak, Finoguenov,Giavalisco, Guzzo,Mobasher, Sanders
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Major features :
• large area -- 1.4 x 1.4 deg => cover largest large scale structures • high sensitivity ( I > 28.6 mag AB , 5) => morphology of L* galaxies at z < 2
• sensitivity + area => 2x106 galaxies , unusual objects at higher z
• equatorial => multi- observations from all tel.
Cosmic Evolution Survey
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1.4 deg
17 orbits10/31/03
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1.4 deg
130 orbits3/31/04
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1.4 deg
270 orbits as of 6/15
ACS 270 orbits5/14/04ACS I
-band
Cycle 12
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1.4 deg
ACS 477 orbits1/14/05
NICMOS-31.6 m -- 24mag~7% of area
ACS I-band
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ACS 590 orbits
NICMOS-31.6 m -- 24mag~7% of area
1.4 deg
NICMOS-31.6 m -- 24mag~7% of area
Cycle 12 & 13
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Enormous area and sensitivity ==> large samples of all objects :
!!
ACS source counts
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COSMOS Photo-z catalog (Subaru, CFHT, NOAO)
Redshift distribution
Redshift uncertainties
LSS from galaxy overdensities in redshift slices ==>
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Test of adaptive smoothing:
~ 50% of gal. w/i structures~ 50% in field
overdensity galaxies
recovered distribution
• recovers all significant structures
• retains power on all scales
• no spurious recoveries
• conserves number counts
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All SED types (not just early types)
redshift slices w/ z = 0.1
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gal
w/ieach LSS
~ 40 major large-scalestructures at z < 1.2
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LSS mass : galaxies w/i each LSS
Prob. of halo mass structures
cosmos
Photometric/luminous mass(DM halo ~ 10+ times larger)
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luminous early-type ==> dense core of LSS
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XMM-Newton COSMOS
Hasinger etal
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X-ray: COSMOS-XMM survey (Hasinger et al.)
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Late (spirals and SB)
Early (S0 & E)
higher z ==> later type SED cores of LSS/halos ==> earlier type SED
Z
Galaxy type
see LSS out to highest z !
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Ly Alpha emission @ z=5.7 in the COSMOS
narrow band subaru imaging at 8150 Ang.Taniguchi & Ajiki etal
58 emission candidates
Survey Volume = 1.5×106 Mpc3
n(LAE) = 3.8×10-5 Mpc-3
Lly alpha > 1042.6 ergs/s
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8”
Examples of LAEs @ z=5.7
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diffuse
compact chain?
diffuse
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COSMOS has gotten to z=5.7 !!!
~ 200Mpc
LSS @ z=5.7 probed by LAEs
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COSMOS field : 1.4x1.4 deg near equator RA = 10:00:28.6 DEC = +02:12:21 (near but shifted from VVDS 10 hr field) EB-V = 0.02 mag ! and very uniform
==> rel. sens. only ~20 - 25% worse than very best fields
!! most important : all instruments can see field e.g. VLA, ALMA future TMT/OWL
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COSMOS multi-
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Selection of LAEsiz-NB816 vs. NB816 ==> 58 candiates
NB816 < 25.1 (5σ)iz – NB816 > 0.7 & 3σNot detected in B, V, & r’ [B > 27.6 V > 27.1, & r’ > 27.1]
58 objects
Survey Volume = 1.5×106 Mpc3
n(LAE) = 3.8×10-5 Mpc-3
Lly alpha > 1042.6 ergs/s
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covers vol ~ SDSS at z ~1Lookback 8-10 Gyr
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Abell class 2 -4