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ALMA Presentation

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Epoch of Reionization. last phase of cosmic evolution to be explored ... Coeval formation of SMBH ... Coeval formation SMBH Host Gal. Break-down MBH-Mbulge ... – PowerPoint PPT presentation

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Title: ALMA Presentation


1
ALMA studies of the first galaxies Madrid
2006 Chris Carilli (NRAO)
Epoch of Reionization
  • last phase of cosmic evolution to be explored
  • bench-mark in cosmic
  • structure formation
  • indicating the first
  • luminous structures

2
First observational constraints on cosmic
reionization
Gunn-Peterson Effect (Fan) gt Near edge of
reionization at z 6.
T
3
  • Current observations z_reion 11 to 6 (Fan,
    Carilli, Keating 2006)
  • Not event, but complex process, large
    variance time/space
  • GP gt occurs in twilight zone, opaque ?_obs lt
    0.9 um ??

4
Radio astronomical probes of the Epoch of
Reionization and the 1st luminous objects
  • CMB large scale polarization
  • Neutral IGM HI 21cm emission and absorption
  • Objects within EoR Molecular gas, dust, star
    formation

Collaborators USA Carilli, Wang, Fan,
Strauss Euro Bertoldi, Walter, Riechers, Cox,
Menten, Omont, Beelen
5
Dust at z 6 (see Bertoldi)
  • 30 of z6 QSO host galaxies Hyper-lum. IR
    galaxies LFIR 1e13 Lo
  • Mdust 1e8 Mo
  • tuniv lt 1Gyr gt Dust formation in massive stars?

S250 3mJy
6
Near-IR to Radio SEDs Star formation?
  • Hot (1000K) dust AGN accretion disk
  • Warm (50K) dust starburst?
  • Follow radio-FIR correlation
  • SFR(gt5Mo) 1e3 Mo/yr

7
  • Similarity to IR-selected QSOs, not optical (PG)
    QSOs
  • Coeval formation of SMBH stellar host galaxy?
  • Consistent with downsizing in galaxy/SMBH
    formation.

8
Molecular gas fine structure lines (Walter)
J1148 VLA CO 3-2
z6.42 t_univ0.87 Gyr
CII
IRAM
2.5
CO 6-5
11485251
  • Only direct probe of host galaxy
  • CII luminosity also implies SFR 1e3 Mo/yr
    (Maiolino)
  • 2e10 Mo of molecular gas fuel for star
    formation
  • Early enrichment of heavy elements zsf gt 8

0.3
Tb 40K
9
Breakdown MBH - Mbulge relation at high z SMBH
forms first?
CO gt Mgas 2e10 Mo Mdyn 5e10 Optical
gt MBH 2e9 gt Mbulge 1e12
X
11485251
MBULGE 1000MBH
10
Cosmic Stromgren Spheres
  • 11485251 Accurate z_host from CO
    z6.419/0.001
  • Proximity effect photons leaking from
    6.32ltzlt6.419

White et al. 2003
  • time bounded Stromgren sphere R 4.7 Mpc
  • f(HI) 1e-5 R-3 (t_qso/1e7) yrs
  • ltf(HI)gt 0.1 for sample 19 QSOs at zgt5.7
  • (Fan et al. 06 Wyithe et al. 04)

11
Current limits z5.7 Ly? galaxies in COSMOS
(Murayama/Scoville)
NB850
VLA
99 Ly? emitters at z5.7/-0.05 SUBARU
Ly??????????? 2 Mo/yr MAMBO ltS250gt lt2mJy gt
SFRlt300 VLA ltS1.4gt lt2.5?Jy gt SFRlt125
12
Complementary Panchromatic view of galaxy
formation
SFR10M_sun/yr
cm Star formation, AGN
(sub)mm Dust
Near-IR Stars, Ionized gas, AGN
13
Line sensitivity
High order, fine structure lines
Low order
14
Wootten
CO
HCO
HCN
CCH
z6.55 SFRgt10M_sun/yr
  • Detect dust emission in 1sec (5?) at 250 GHz
  • Detect multiple lines, molecules per band gt
    detailed astrochemistry
  • Image dust and gas at sub-kpc resolution gt gas
    dynamics/dark matter

15
ALMA Probing Cosmic Reionization
  • Twilight zone z6-11 limited to near-IR to
    radio ???
  • First forays z6 QSOs Host
  • HLIRGs early dust/C,O.. formation
  • Coeval formation SMBHHost Gal.
  • Break-down MBH-Mbulge
  • CSS gt f(HI) gt 0.1
  • ALMA dust, gas, dark matter
  • Imaging of normal galaxies
  • Detailed physics and astrochemistry

16
Loeb Rybicki 2000
17
First observational constraints on cosmic
reionization
Large scale polarization of CMB
Gunn-Peterson Effect
TT
TE
EE
T
Page
Fan et al 2003
Fan
18
  • IRAM 30m MAMBO sub-mJy sens at 250 GHz
    wide fields
  • IRAM PdBI sub-mJy sens at 90 and 230 GHz
    arcsec resol.
  • VLA uJy sens at 1.4 GHz
  • VLA lt 0.1 mJy sens at 20-50 GHz 0.2 resol.
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