GALAXY EVOLUTION OPTICAL AND IR SURVEYS

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GALAXY EVOLUTION OPTICAL AND IR SURVEYS
Lucia Pozzetti INAF Osservatorio Astronomico di
Bologna
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PEOPLE INVOLVED IN BOLOGNA

• INAF-OAB Bardelli, Cappi, Ciliegi, Gruppioni,
  Merighi,
• Mignoli, Pozzetti,
  Zamorani, Zucca,
• Post-doc Lanzoni,
  (McCracken), Pozzi
• INAF-IRA Bondi, Lari, Vettolani, Zanichelli
• UniBo Marano, Gregorini, Post-doc Bolzonella, 2
  students
• Funds (gt2000)
• 2 ASI 3 Cofin Inaf
  CNR
• k 30 9 53 110 87
  15.5 93
• Publications since 1998 (2000)
• 79 (64) Refereed 10 in press
• (5 more than 50 citations, 2 more than
  100)
• 100 (80) Conference Invited

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GALAXY EVOLUTION

• Deep optical to Far-IR surveys
• to trace galaxy evolution and formation
• Star Formation History (SFH)
• Epoch of Mass Assembly
• High-z galaxies (EROs, LBGs)

Stellar Mass Density (Dickinson et al. 2003)
Star Formation History (Madau, Pozzetti,
Dickinson 1998)
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• Expertise
• Data Optical/Far-IR data spectral
• analysis (e.g. Lari Method for ISO)
• Analysis Luminosity Mass Function, SFH
• Spectral evolutionary models and
  
• Photometric redshift (e.g
  HyperZ)
• Modeling Hierarchical, PLE, Fundamental Plane
• International Commitees (OAB) ESO- panel OPC,
  TNG-TAC,
• 
  ESO Survey working group
• Telescopes used ESO (1.5m,2.2m,3.6m,NTT,VLT)
  ISO
• CFHT, 2dF, VLA,
  public HST, Chandra

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MAIN PROJECTS AND SURVEYS

• ELAIS (European Large Area ISO Survey)
• K20 (Large Programme VLT Klt20 redshift survey)
• VVDS (VIMOS-VLT Deep Survey)

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THE ELAIS MID-IR SURVEY
European Large Area ISO Survey (P.I.
Rowan-Robinson) the largest Open Time project
with ISO satellite (375h) 12 deg2 (?8 in the
North and ?4 in the South) observed at 15 90
?m with ISO-CAM PHOT
ITALIAN COLLABORATORS
Gruppioni, Ciliegi, Pozzi, Zamorani (INAF-OAB),
Lari (INAF-IRA), Franceschini (UniPd) LaFranca,
Matute (UniRm3)
OTHER COLLABORATORS
ELAIS Consortium (9 European institutes,
originally, 32 at the moment)
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ELAIS-S1 (4 deg2) Catalogue of 462 source 90
(100) complete at 2 (3) mJy ?320 extragalactic
objects (Lari, Pozzi, Gruppioni et al.,
2001,MNRAS,325,1173)
Source Counts in the range 0.5 - 100 mJy strong
evolution for starburst galaxies (Gruppioni,
Lari, Pozzi et al. 2002, MNRAS, 335,831)
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Photometric IDs (80 Rlt23) 12n
ESO1.5m Spectroscopic IDs (75 Rlt21.5 250
objs) 2dF(2n) ESO (15n) (La Franca, Gruppioni
et al., 2003, AJ, submitt.)
ELAIS-S1
redshift
First derivation of 15-?m Luminosity Function of
Star-forming galaxies strong evolution both
in luminosity (1z)3.5 and density (1z)3.8
(Pozzi, Gruppioni et al., 2003, ApJ, submitted)
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K20 REDSHIFT SURVEYP.I. A. Cimatti
(INAF-OAA)K20 team Pozzetti, Mignoli,
Zamorani (INAF-OAB), Daddi,
Renzini, DOdorico, Gilmozzi, (ESO)
Fontana, Giallongo, Menci, Poli (OARm),
Saracco (OABr), Cristiani (OATs),
Broadhurst (HUJ)

• Large Programme 17 nights VLT
• (MOS with FORS1 FORS2 ISAAC)
• Kslt20 selected sample 550 objects
• Area 52 arcmin2 on 2 fields (CDFSQ0055)
• UBVRIzJKs multi-band imaging public 45h
  NTTVLT
• 92 redshift completeness
• Highest spectroscopic redshift completeness in
  the NIR

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Scientific objectives

• Advantages of a K-selected sample
• Less dust extinction
• More sensitive to stellar mass
• Objectives
• To test galaxy evolution models
• To search massive old high-z (zgt1) ellipticals
  (EROs)
• To probe the near-IR luminosity function and
• stellar mass function up to z2

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• First spectroscopic sample of EROs
• (Cimatti, Daddi et al. 02, Daddi et al. 02)
• 31 old ellipticals _at_ z1
• ? agegt3 Gyrs, zformgt2
• 33 dusty starbursts
• ? 20 of SFD _at_ z1

excess

• Redshift distribution
• (Cimatti, Mignoli et al. 02, Cimatti, Pozzetti et
  al. 02)
• Substantial population at high-z (32 at zgt1)
• ? Underpredicted by hierarchical models

deficit
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• Near-IR Luminosity Function up to z2
• (Pozzetti, Cimatti, al. 03)
• Mild luminosity evolution up to z1.5
• Luminous red ellipticals fully
• in place up to z1.5

excess ?
deficit

• Stellar Mass Function up to z2
• (Fontana, Pozzetti, al. 03, submitted)
• Slow decrease (50) of mass
• density up to z2

deficit ?
mild evolution ?
Most of current hierarchical merging models do
not match the above results
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K20 Follow-up K20 team Lanzoni
(INAF-OAB), Vernet,
diSerego Alighieri (OAA),
Fasano, Pignatelli (OAPd), Cassata,
Franceschini (UniPd),
Fomalont, Kellerman (NRAO)

• Spectral analysis and evolution (Mignoli et al.,
  Pozzetti et al., in prep.)
• X-ray analysis (public Chandra data)
• ? EROs (Brusa et al. 02), clustering (Gilli
  et al. 03)
• Morphological analysis from GOODS-ACS images
• ? Luminous starbursts/mergers _at_z2-2.5
  building blocks of massive
• spheroids ? (Daddi et al. 03)
• ? Morphologies of EROs (Cimatti et al. 03 )
  40 early, 30spiral, 30 Irr.
• High resolution spectroscopy (4 nights VLTFORS2)
• ? Tully-Fisher (Vernet et al., in prep.),
• ? Fundamental-Plane (Cimatti et al. ,
  Lanzoni et al. in prep),
• ? spectral population analysis (Pozzetti et
  al., in prep)
• Radio observations (VLA-1.4 GHz) (Fomalont et
  al., in prep)

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VVDS SURVEYP.I. Le Fevre (LAM) Co P.I.
Vettolani (INAF-IRA)consortium Bardelli, Cappi,
Ciliegi, Merighi, Pozzetti,
Zamorani, Zucca,(McCracken) (INAF-OAB),
Bondi, Vettolani, Zanichelli (INAF-IRA),
Marano,Gregorini,Bolzonella,Bongi
orno 2 students (UniBo),
INAF-OABr, INAF-IASF, INAF-OANa,
LAM (Marsiglia), OMP (Tolosa)

• Area 4 fields 2x2 deg2
• deep BVRI (CFHT) U (ESO2.2m) JK (ESONTT)
  imaging
• ? Multicolor catalog 106 objects (McCracken
  et al. 03)
• GTO Programme 50 nights VLTVIMOS
• deep survey IABlt24 25,000 z, wide IABlt22.5
  50,000 z
• 29 nights (21 clear) in 2002 ? 21,000 spectra
• 5 half nights in december 2003
• deep VLA (60h at 1.4Ghz) on 1 deg2 (Bondi,
  Ciliegi et al. 03)

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VVDS is the deepest and largest optical redshift
survey to date to study galaxy evolution up to
z1.5
Complementary to wide local survey, like SDSS and
2dF in competition with DEIMOS-DEEP2 (P.I. M.
Davis) at Keck

• Evolution of the optical luminosity function and
  star formation rate of various types of galaxies
  (ellipticals, star-forming galaxies etc.) in
  various density environments
• Evolution of the clustering properties
• High-z galaxies (LBGs, EROs)

Scientific results from the spectroscopic
survey are still a few months ahead
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Future Projects

• Legacy Programs in which we are involved
• SWIRE (Sirtf Wide-area Infrared Extragalactic
  Survey
• 851h SIRTF P.I. Lonsdale)
• ESO (WFI VIMOS 150h SOFI)
  ATCA (120h)
• GOODS (The Great Observatories Origins Deep
  Survey
• 647h SIRTF P.I. Dickinson)
  HST VLT
• COSMOS (590 orbits HST) CFHT Subaru KPNO
• VLT-VIMOS XMM
  VLA SIRTF GALEX IRAM
• Other programs
• Massive Galaxies at z2 (4n VIMOS Subaru, P.I.
  Renzini)
• GMASS (Galaxy Mass Assembly ESO-LP 145h FORS2,
  P.I. Cimatti)

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GRAZIE
Provided by Lara