ESO Radio observations of the formation of the first galaxies and supermassive black holes Chris Carilli (NRAO) Keck Institute, August 2010 Current State-of-Art: Quasar host galaxies at z=6. Coeval formation of massive galaxies and SMBH within 1 Gyr of the Big Bang Bright (near!) future: pushing to normal galaxies with the Atacama Large Millimeter Array and Expanded Very Large Array (+ CCAT!) [Quasar near-zones: approaching reionization] Collaborators: R.Wang, D. Riechers, Walter, Fan, Bertoldi, Menten, Cox, Strauss, Neri Carilli et al.

1/3 of z>2 quasars have S 250 > 2mJy L FIR ~ 0.3 to 1.3 x10 13 L o (47K, β = 1.5) M dust ~ 1.5 to 5.5 x10 8 M o MAMBO 250GHz surveys 2.4mJy HyLIRG Massive galaxy formation at z~6: gas, dust, star formation in quasar hosts Why quasar hosts?  Probe massive galaxy formation: L bol ~10 14 L o => M BH ~ 10 9 M o => M bulge ~ M o  Spectroscopic z Wang sample: 33 quasars at z>5.7

Dust formation at t univ <1Gyr? AGB Winds ≥ 1.4e9yr  High mass star formation? (Dwek, Anderson, Cherchneff, Shull, Nozawa)  ‘Smoking quasars’: dust formed in BLR winds (Elvis )  ISM dust formation (Draine) Extinction toward z=6.2 QSO and z~6 GRBs => different mean grain properties at z>4 (Perley, Stratta)  Larger, silicate + amorphous carbon dust grains formed in core collapse SNe vs. eg. graphite Stratta et al. z~6 quasar, GRBs Galactic SMC, z<4 quasars

Dust heating? Radio to near-IR SED T D = 47 K  FIR excess = 47K dust  SED consistent with star forming galaxy: SFR ~ 400 to 2000 M o yr -1 Radio-FIR correlation Low z SED T D ~ 1000K

Fuel for star formation? Molecular gas: 8 CO detections at z ~ 6 with PdBI, VLA M(H 2 ) ~ 0.7 to 3 x10 10 (α/0.8) M o Δv = 200 to 800 km/s

CO excitation: Dense, warm gas, thermally excited to 6-5 LVG model => T k = 50K, n H2 = 2x10 4 cm -3 Giant Molecular Cloud (50pc): n H2 ~ 10 2 to 10 3 cm -3 GMC cores (≤1pc): n H2 ~ 10 4 cm -3 MW M82 nucleus

L FIR vs L’(CO): ‘integrated Kennicutt-Schmidt law’ Index=1.5 1e11 M o 1e3 M o /yr Further evidence for star formation Gas consumption time (M gas /SFR) decreases with SFR FIR ~ L o /yr => t c ~10 8 yr FIR ~ L o /yr => t c ~10 7 yr SFR M gas

 Size ~ 6 kpc, with two peaks ~ 2kpc separation  Dynamical mass (r < 3kpc) ~ 6 x10 10 M o  M(H 2 )/M dyn ~ 0.3 Imaging => dynamics => weighing the first galaxies z= km/s +150 km/s 7kpc 1” ~ 5.5kpc CO3-2 VLA ”

Break-down of M BH -- M bulge relation at very high z High z QSO CO Low z QSO CO Low z galaxies Haaring+Rix; Riechers + = 15 × low z => Black holes form first? or, inclination close to sky plane: i < 20 o

 Dominant ISM gas cooling line: traces CNM and PDRs  [CII] strongest (factor 10!) cm to FIR line in MW ~ 1% L Gal  z>4 => FS lines observed in (sub)mm bands 1” [CII] [NII] [CII] 158um search in z > 6.2 quasars L [CII] = 4x10 9 L o (L [NII] < 0.1L [CII] ) S 250GHz = 5.5mJy S [CII] = 12mJy S [CII] = 3mJy S 250GHz < 1mJy Kundsen, Bertoldi, Walter, Maiolino +

z=6.42:‘Maximal star forming disk’ (Walter ) [CII] size ~ 1.5 kpc => SFR/area ~ 1000 M o yr -1 kpc -2 Maximal starburst (Thompson, Quataert, Murray 2005)  Self-gravitating gas disk  Vertical disk support by radiation pressure on dust grains  ‘Eddington limited’ SFR/area ~ 1000 M o yr -1 kpc -2  eg. Arp 220 on 100pc scale, Orion SF cloud cores < 1pc 1” PdBI 250GHz 0.25”res

[CII] [CII]/FIR decreases with L FIR = lower gas heating efficiency due to charged dust grains in high radiation environments Opacity in FIR may also play role (Papadopoulos) Malhotra

[CII] HyLIRG at z> 4: large scatter, but no worse than low z ULIRG Normal star forming galaxies are not much harder to detect in [CII] (eg. LBG, LAE) [CII]/FIR increases with decreasing metalicity (Israel et al.) Maiolino, Bertoldi, Knudsen, Iono, Wagg z >4 B1335

 11 in mm continuum => M dust ~ 10 8 M o : Dust formation in SNe?  10 at 1.4 GHz continuum: Radio to FIR SED => SFR ~ 1000 M o /yr  8 in CO => M gas ~ M o = Fuel for star formation in galaxies  High excitation ~ starburst nuclei, but on kpc-scales  Follow star formation law (L FIR vs L’ CO ): t c ~ 10 7 yr  3 in [CII] => maximal star forming disk: 1000 M o yr -1 kpc -2  Departure from M BH – M bulge at z~6: BH form first? Summary: cm+mm observations of 33 quasars at z~6 Implications: Coeval formation of giant elliptical galaxies + SMBH at t univ < 1Gyr Rapid enrichment of metals, dust in ISM Rare, extreme mass objects: ~ 100 SDSS z~6 QSOs on entire sky Goal: push to normal galaxies at z > 6

What is the EVLA? similar ten-fold improvement in most areas of cm astronomy frequencies = 1 to 50 GHz 8 GHz BW => 80x old res = 40mas res at 43GHz rms = 6uJy in 1hr at 30GHz What is ALMA? Tenfold improvement (or more), in all areas of (sub)mm astronomy, including resolution, sensitivity, and frequency coverage. antennas: 54x12m, 12x7m antennas frequencies: 80 GHz to 720 GHz res = 20mas res at 700 GHz rms = 13uJy in 1hr at 230GHz ALMA Control Building ALMA+EVLA = Order magnitude improvements from 1GHz to 1 THz!

(sub)mm: dust, high order molecular lines, fine structure lines -- ISM physics, dynamics cm telescopes: star formation, low order molecular transitions -- total gas mass, dense gas tracers Pushing to normal galaxies at high z 100 M o yr -1 at z=5

ALMA and first galaxies: [CII] and Dust 100M o /yr 10M o /yr Exciting prospect: redshifts for z>7 galaxies using [CII]

Wide bandwidth spectroscopy ALMA: Detect multiple lines, molecules per 8GHz band EVLA at 32GHz (CO2-1 at z=6): Δz =1.8 => large cosmic volume searches J at z=6.4 in 24hrs with ALMA

ALMA Status Antennas, receivers, correlator in production: best submm receivers and antennas ever! Site construction well under way: Observation Support Facility, Array Operations Site, 5 Antenna interferometry at high site! Early science call Q EVLA Status Antenna retrofits 70% complete (100% at ν ≥ 18GHz). Early science in March 2010 using new correlator (2GHz) Full receiver complement completed GHz 5 antennas on high site

EVLA: GN20 molecule-rich proto-cluster at z=4 CO 2-1 in 3 submm galaxies, all in 256 MHz band z= mJy CO2-1 46GHz 0.4mJy 1000 km/s 0.3mJy SFR ~ 10 3 M o /year M gas ~ M o Early, clustered massive galaxy formation

ESO Intensity mapping: large scale structure in CO or [CII]

Quasar Near Zones: J Accurate host galaxy redshift from CO: z=6.419 Quasar spectrum => photons leaking down to z=6.32 White et al ‘time bounded’ Stromgren sphere ionized by quasar Difference in z host and z GP => R NZ = 4.7Mpc [f HI L γ t Q ] 1/3 (1+z) -1

HI Loeb & Barkana HII

Quasar Near-Zones: sample of 25 quasars at z=5.7 to 6.5 (Carilli et al. 2010) I.Host galaxy redshifts: CO (6), MgII (11), UV (8) I.GP on-set redshift: Adopt fixed resolution of 20A Find 1 st point when transmission drops below 10% (of extrapolated) = well above typical GP level. Wyithe et al z = 6.1

Quasar Near-Zones: Correlation of R NZ with UV luminosity N γ 1/3 L UV

decreases by factor 2.3 from z=5.7 to 6.5 => f HI increases by factor 9 (eg to ) Pushing into tail-end of reionization? R NZ = 7.3 – 6.5(z-6) Quasar Near-Zones: R NZ vs redshift z>6.15

Alternative hypothesis to Stromgren sphere: Quasar Proximity Zones (Bolton & Wyithe) R NZ measures where density of ionizing photon from quasar > background photons (IGRF) => R NZ [L γ ] 1/2 (1+z) -9/4 Increase in R NZ from z=6.5 to 5.7 is then due to rapid increase in mfp during overlap or ‘percolation’ stage of reionization Either case (CSS or PZ) => rapid evolution of IGM from z ~ 5.7 to 6.5

cm: Star formation, AGN (sub)mm Dust, FSL, mol. gas Near-IR: Stars, ionized gas, AGN Pushing to normal galaxies: continuum A Panchromatic view of 1 st galaxy formation 100 M o yr -1 at z=5

Comparison to low z quasar hosts IRAS selected PG quasars z=6 quasars Stacked mm non-detections Hao et al. 2005

HST / OVRO CO Wilson et al. cm lines: low order molecular lines => gas mass, dynamics cm continuum: synchrotron emission => star formation, AGN mm continuum: thermal emission from warm dust => star formation mm lines: high order molecular lines, atomic fine structure lines => ISM physics Carilli, Wang, Riechers, Walter, Wagg, Bertoldi, Menten, Cox, Fan 1 st galaxies: cm/mm observations

Malhotra: Fundamental correlation is with dust temperature, not FIR

Building a giant elliptical galaxy + SMBH at t univ < 1Gyr  Multi-scale simulation isolating most massive halo in 3 Gpc 3  Stellar mass ~ 1e12 M o forms in series (7) of major, gas rich mergers from z~14, with SFR  1e3 M o /yr  SMBH of ~ 2e9 M o forms via Eddington-limited accretion + mergers  Evolves into giant elliptical galaxy in massive cluster (3e15 M o ) by z= Rapid enrichment of metals, dust in ISM Rare, extreme mass objects: ~ 100 SDSS z~6 QSOs on entire sky Goal: push to normal galaxies at z > 6 Li, Hernquist et al.