1 / 29

SMA [CII] 158um 334GHz, 20hrs

BRI1202-0725 z=4.7 HyLIRG (10 13 L o ) pair: Quasar host Obscured SMG SFR ~ 10 3 ; M H2 ~ 10 11. SMG. QSO. +. 4 ”. +. Salome ea. 2012. SMA [CII] 158um 334GHz, 20hrs. HST 814 Hu ea 96. Iono ea 2007. Wagg ea. [CII] in 1202-0725. ALMA SV 20min, 16 ants. 334GHz.

rian
Download Presentation

SMA [CII] 158um 334GHz, 20hrs

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. BRI1202-0725 z=4.7 • HyLIRG (1013Lo) pair: • Quasar host • Obscured SMG • SFR ~ 103; MH2 ~ 1011 SMG QSO + 4” + Salome ea. 2012 SMA [CII] 158um 334GHz, 20hrs HST 814 Hu ea 96 Iono ea 2007

  2. Wagg ea [CII] in 1202-0725 ALMA SV 20min, 16 ants 334GHz SMA 20hrs

  3. ALMA/JVLA revolution: Cool gas in distant galaxies • 54x12m, 12x7m • Frequencies = 80 GHz to 900 GHz • Resolution = 20mas at 800 GHz • Sensitivity > 100x submm sensitivity • 80x Bandwidth (8 GHz), with 4000 chans • 5x freq coverage (1 to 50 GHz, continuous) • 10x continuum sensitivity • Spatial resolution ~ 40mas at 43 GHz • Order of magnitude, or more, improvement from 1 GHz to 1 THz! • 2013: Fully operational

  4. cm to submm diagnostics of galaxy formation 100 Mo yr-1 at z=5 • Low J CO emission: total gas mass, dynamics • High density gas tracers (HCN, HCO+) • Synch. + Free-Free = star formation • High J molecular lines: gas excitation, physical conditions • Dust continuum = star form. • Atomic FIR fine structure lines: ISM gas coolant

  5. ARAA: Cool gas in high redshift galaxies Carilli & Walter 2013 arXiv1301.0371 mm cm • 200 galaxies detected in CO at z>1 • 40 detected in [CII] or [CI] FSL, other molecules • Gas dynamical imaging in multiple species/transitions

  6. Cool gas detections at z>1 over time • Color-selected (FIR≤1012 Lo) • ‘main sequence’: • SFR ≤ 102 Mo/yr, • ρ ≥ 10-4 Mpc-3 • HyLIRG (FIR~1013 Lo) • ‘starburst’ (SMG/QSO): • SFR ≥ 103 Mo/yr • ρ ≤ 10-5 Mpc-3 • Rapid rise in last 3 years: • New instrumentation (Bure, VLA, GBT) • New population: ‘normal’ color-selected SF galaxies (sBzK/BX/BM…)

  7. JVLA CO 2-1 BRI 1335-04 z=4.4 Hyper-starbursts (SMG/QSOs): Early formation of elliptical galaxies in dense environments in major starburst events at tuniv< 2Gyr • M(H2) ~ 1010-11(α/0.8) Mo = ‘fuel for star formation’ • CO gas kinematics: strong gravitational interaction (tidal bridges/tails) => merging gas rich galaxies • Some cases of large, clumpy, rotating disks ~ 10kpc, vrot ~ 300 km/s 1” Riechers ea TB = 30 to 60K Li ea

  8. SMG GN20 z=4.0 ‘protocluster’ JVLA CO 2-1 imaging 0.3mJy 0.7mJy GN20 z=4.055 + + + + 5” GN20.2b 4.056 + + + + GN20.2a 4.051 + + 0.4mJy • 6x over-density: 19 LBGs at zph ~ 4 within ~ 1’ • JVLA 45GHz, BW=256MHz: CO2-1 from 3 SMGs

  9. CO 2-1 Mom0 1” 1” 0.25” Mom1 • GN20 z=4.05 • SFR = 2000 Mo/yr • Highly obscured at I band • CO: large, rotating, disk ~ 14 kpc • Mdyn = 5.4 1011 Mo • Mgas = 1.3 1011 (α/0.8) Mo HST/CO/SUBMM -250 km/s + +250 km/s Hodge ea 2012

  10. State of art: CO at z=4 at HST-resolution 0.15” ~ 1kpc 0.5” • Tb ~ 20K, σv ~ 100 km/s • Self-gravitating super-GMCs? • Mdyn ~ Mgas ~ 109 (α/0.8) Mo Hodge ea 2012

  11. JVLA 60” field, 256MHz band: CO 1-0 from ‘color selected’ galaxy at z=1.5 CO1-0 z=1.5 CO2-1 z=4.0 • Serendipity becomes the norm! • Every observation with JVLA at ≥ 20GHz will detect CO in distant galaxies

  12. Deep fields: thousands SF color selected galaxies z ~ 1 to 3 SMGs Elbaz ea SFR Main Sequence 10kpc sBzK/BX/BM – ‘main sequence’ Mstar • SFR ~ 10 – 100 Mo/yr: ‘typical z~2 SF galaxies’ • HST => clumpy disk ~ 1”, punctuated by massive SF regions • Define a ‘main sequence’ in Mstar – SFR (vs. ‘starburst’) • Common ~ 5 arcmin-2 ~ 100x SMG

  13. Daddi ea (2010): Bure detected CO 2-1 z~1.5 (massive) MS galaxies • 6 of 6 sBzK detected in CO • CO luminosities approaching SMGs but, • FIR (SFR) ≤ 10% SMGs • Massive gas reservoirs without hyper-starbursts • Mgas ≥ 1010 (α/4) Mo

  14. MS galaxies: Baryon fraction dominated by cool gas, not stars Daddi ea 2010 Tacconi ea 2013 z~1.5 MW α=4 0.5 0.5 Narayanan α z~0 spirals fgas increases with decreasing Mstar ?

  15. Conversion factor: M(H2) = α L’CO -300 km/s • Mdyn: using CO imaging, w. norm. factors from simulations • Subtract M*, MDM , assume rest is Mgas => • MS ~ MW: α CO ~ 4 Mo/(K km/s pc2) • SMG ~ nuc. SB: αCO ~ 0.8 7kpc SB +300 km/s • Consistent with: • Analysis based on SF laws (Genzel) • Analysis of dust-to-gas ratio vs. metallicity (Magdis ea) • Radiative transfer modeling (Ivison) Mdyn = 2 1011 Mo GN20 z=4.0 Mdyn = 5.4 1011 Mo MS z=1.1 Tacconi ea. 2010

  16. CO excitation Quasars SMGs MS • quasars ~ constant Tb to high order ~ nuc. SB • => n ≥ 104 cm-3, T ≥ 50K • SMGs: intermediate between nuc. SB and MW • Often large, cooler gas reservoirs • MS/CSG: lowest MW ν2 M82 . . . . MW

  17. Star formation ‘laws’: relating gas to star formation α=4 SB SFR α=0.8 MS Mgas • Overall, PL index = 1.4 • Possibly 2 sequences (Genzel, Daddi) • starburst: td ~ few (α/0.8) x 107 yrs • disk: td ~ few (α/4) x 108 yrs • Both: td << thubble

  18. Evolution of gas fraction: epoch of peak cosmic SF rate density (z~2) = epoch of gas-dominated disks ~ L’CO/R (1+z)2 • All star forming disk galaxies w. M* ≥ 1010 Mo • All points assume α~ 4 => empirical ratio ~ L’CO/R • Good news for blind CO searches!

  19. [CII] 158um FSL line Mag. Clouds • Brightest line from cool gas in star forming galaxies: ~0.3% of FIR for MW-type galaxies • FIR > 1011: large scatter (~ 20dB) • AGN-dominated: low • SF dominated: ‘MW’ • [CII] powerful tool for: • Gas dynamics (CNM – WIM) • Redshift determinations z>6 • Low metallicity: enhanced [CII]/FIR (lower dust attenuation => large UV heating zone) MW 11 Carilli & Walter 2013

  20. Aztec 3: massive cluster formation at z=5.3 ALMA 1hr, 17ant Riechers ea rms = 70uJy Capak ea 2012 • Most distant SMG: SFR ~ 1800, Mgas ~ 5e10 (α/0.8) Mo • Most distant proto-cluster: 11 LBGs in ~ 1’; 5 w. zspec ~ 5.30 • Discover 2nd dust obscured star forming galaxy (450 Mo/yr)

  21. ALMA early science: [CII] imaging, 2hrs, 17ant • Easily detect SMG • Detect ‘dark CII emitter’ • [CII]/FIR ≤ 0.001 ~ ‘starburst/AGN’ • SMG tidal tail or outflow ~ 10kpc Detect LBG group in [CII] • No continuum => SFR < 80 Mo/yr • [CII]/FIR > 0.0023 ~ MW • Possible second DCE?

  22. 1” • Imaging gas dyn: interacting LBG group ~ 7kpc, FWHM< 200 km/s • Serendipity: discover DCE1 & 2 • LBGs easily detected w. ALMA-17 • Don’t select on dust for [CII] search!

  23. Pushing back to first light and cosmic reionization: z ≥ 6 quasar host galaxies z=6.13 • ALMA Cycle 0: 5/5 detected [CII] • Sizes ~ 2-3kpc • Vel grad. => Mdyn ~ few e10 Mo • <MBH/Mbulge> ~ 15 x value at low z • CO profiles differ from [CII] Gas Dust Wang ea -200 km/s +300 km/s 300GHz, 0.5” res 1hr, 17ant

  24. J1120+0641: z=7.084 Most distant zspec Simcoe; Mortlock;Venemans • GP effect: damped profile of neutral IGM wipes-out Lya line: τIGM> 5 • [CII] and dust detected with Bure => SFR ~ 300 Mo/yr

  25. Pushing further into reionization: z~9 near-IR dropouts Bouwens et al. 2012 • Drop-out technique: z~9 galaxies? • SFR ≤ 10 Mo/yr: reionize the Universe? • Difficulty: zspec (no Lya!) • ALMA: [CII] from 5Mo/yr at z=7 in 1hr; 8GHz; BW => Δz ~ 0.3 • Low Metalicities => [CII]/FIR increases! • Band 5 (z=8 to 11) under development z=7.1 quasar

  26. Cool Gas History of the Universe SF Law SFR Mgas • SFHU[environment, luminosity, stellar mass] delineated back to reionization • SF laws => SFHU is reflection of CGHU: study of galaxy evolution is shifting to CGHU (source vs sink) w. JVLA/ALMA • Epoch of galaxy assembly = epoch of gas dominated disks • [CII] detected in LBG/LAE: key gas dynamical tracer and ‘redshift machine’

  27. Hyper-starbursts: gas in QSO hosts JVLA CO 2-1 z=4.4 • 30% quasar hosts are HyLIRG: SFR > 103 Mo/yr => coeval form. of SMBH and massive host gal. 1” Riechers ea z=6.42 0.15” TB ~ 25K Walter ea CO3-2 VLA 1” + 1” ~ 5.5kpc

  28. Hyper-starbursts (SMG/QSOs): Early formation of large elliptical galaxies in dense environments in major starburst events at tuniv< 2Gyr • Clear gas kinematic signs of strong gravitational interaction (tidal bridges/tails) => merging gas rich galaxies • Also cases of large, clumpy, rotating disks ~ 10kpc, vrot ~ 300 km/s • Sub-kpc-resolution => self gravitating super-GMCs? • Possible evidence for AGN outflows Li ea

More Related