Science Synergies with NRAO Telescopes

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Science Synergies with NRAO Telescopes
National Radio Astronomy Observatory Town Hall
AAS 211th Meeting Austin, Texas

• Chris Carill
• NRAO

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First light Pushing into Cosmic Reionization
(tuniv lt 1Gyr)
CO3-2 VLA
SDSS J11485251 z6.42
1 5.5kpc

• z gt6 gt Low order molecular transitions redshift
  to the short cm bands
• LBH 1e14 Lo
• Black hole mass 3 x 109 Mo
• Gas mass 2e10 Mo
• Dust mass 7e8 Mo
• Dyn. Mass 2e10/(sin?)2 Mo

GP absorption gt Universe is opaque at ?obs lt
0.9um
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Continuum SED and CO excitation ladder
Elvis QSO SED
50K
Radio-FIR correlation

• FIR excess in 30 of z6 QSO host galaxies LFIR
  1e13 Lo
• Follows Radio-FIR correlation SFR 3000
  Mo/yr
• CO excitation starburst nucleus Tkin 100K,
  nH2 1e5 cm-3

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CII 158um ISM gas cooling line at z6.4
30m 256GHz Maiolino etal

• FS lines redshift to mm wavelengths at zgt6
• Structure identical to CO 3-2 ( 6 kpc) gt
  distributed gas heating star formation?
• SFR 6.5e-6 LCII 3000 Mo/yr
• gt coeval formation of giant elliptical galaxy
  SMBH within 870 Myr of Big Bang

CII PdBI Walter et al.
CII CO 3-2
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Prediction Fine structure lines will be the
work-horse lines for studies of the first
galaxies with ALMA.
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Cold gas at high redshift QSO host galaxy at
z5.85
GBT CO2-1
PdBI CO5-4
J0840
Sub-thermal excitation of CO 5-4 gt Super-massive
molecular gas reservoir 9e10Mo, of cooler
(lt40K), lower density (lt1e4cm-3), molecular gas
Wagg, Wang, et al. 2008
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Median stacking of 6500 U-dropouts (z3) from
Cosmos field

• SFR(radio) 73 Mo/yr
• SFR(UV) 14 Mo/yr (w/o dust correction)
• UV dust attenuation factor for LBGs 5.2 /-
  1.2
• EVLA will detect synchrotron from individual LBGs
  in 10hr with FoV 30arcmin
• ALMA will detect dust, CO in 1 hr (although
  smaller FoV 20arcsec)

VLA 1.4GHz S1.4 0.9 /- 0.21 uJy
See poster by N. Lee
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Synergy spectral line studies of normal galaxies
into reionization
cm telescopes low order molecular transitions
total gas mass, dense gas tracers, dynamics
(sub)mm high order molecular lines fine
structure lines ISM physics and star formation
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Synergy continuum A Panchromatic view of galaxy
formation
Arp 220 vs z
cm Star formation, AGN
(sub)mm Dust, molecular gas
Near-IR Stars, ionized gas, AGN
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NRAO One Observatory serving all astronomers

• Time allocation
• Single proposal tool, serving all NRAO
  telescopes
• Joint programs single proposal using multiple
  telescopes, as dictated by science goals
• Panel review(s?) with broad range of
  representation
• NRAO Archive one stop shopping
• Single archive with raw data and standard data
  products pipeline processed images, spectra
• Single interface

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NRAO and the community moving together into the
21st Century

• Example ALMA development budget
• 10M/year (globally) gt leverage 1.2G
  investment to remain state-of-art for 20 years
• Hardware and software projects can be proposed
  and carried out by the NRAO, other institutions
  within North America, or as collaborative
  efforts.
• ALMA Board resolution The ALMA Board has
  charged the project to develop a long term ALMA
  Development Plan in consultation with the
  international astronomy community. The plan
  should set out the scientific context for
  transformational science with ALMA in 2020, in
  the era of, for example, JWST, ELTs and SKA, and
  the developments necessary to achieve this
  vision. The ALMA Board views this plan as having
  the utmost strategic priority, and is
  coordinating its development across the entire
  ALMA partnership.
• Guiding principle This should be a pan-chromatic
  perspective, incorporating ALMA's appeal to
  non-sub-mm/mm specialists

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The Process

• Stage I
• The JAO Project Scientist and the ASAC identify
  the scientific themes for sub-groups (for
  example star formation, galaxy formation,),
  with input from regional science advisory
  committees (ANASAC in NA)
• International ALMA Workshop organized by JAO,
  with broad community involvement, following the
  sub-group theme
• Sub-group Chairs, the ASAC and JAO produce the
  preliminary report
• Stage II
• Preliminary report distributed to Executives and
  used for any necessary regional activities,
  coordinated by ANASAC in NA
• Presented in appropriate forums in each region
  for further feedback, eg. ANASAC meetings, NAASC
  workshops, AAS townhall(s)
• Sub-group Chairs, the ASAC and JAO produce the
  final report based on feedback

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