complete the coordinated molecular probe line extinction thermal emission survey alyssa a. goodman,...
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COMPLETEThe COordinated Molecular Probe Line Extinction Thermal Emission Survey
Alyssa A. Goodman, Principal Investigator (CfA)João Alves (ESA, Germany)
Héctor Arce (Caltech)Paola Caselli (Arcetri, Italy)
James DiFrancesco (HIA, Canada)Mark Heyer (UMASS/FCRAO)
Doug Johnstone (HIA, Canada)Scott Schnee (CfA, PhD student)
Mario Tafalla (OAN, Spain)Tom Wilson (MPIfR/SMTO)
2MASS/NICER Extinction Map of Orion
Current, Un-coordinated, State of Affairs
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SCUBA
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R.A. (2000)
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SCUBA
Molecular Line Map
Nagahama et al. 1998 13CO (1-0) Survey
Lombardi & Alves 2001Johnstone et al. 2001 Johnstone et al. 2001
The Rewards of Coordination
C18ODust EmissionOptical Image
NICER Extinction Map
Radial Density Profile, with Critical
Bonnor-Ebert Sphere Fit
Coordinated Molecular-Probe Line, Extinction & Thermal Emission Observations of Barnard 68
This figure highlights the work of Senior Collaborator João Alves and his collaborators. The top left panel shows a deep VLT image (Alves, Lada & Lada 2001). The middle top panel shows the 850 m continuum emission (Visser, Richer & Chandler 2001) from the dust causing the extinction seen optically. The top right panel highlights the extreme depletion seen at high extinctions in C18O emission (Lada et al. 2001). The inset on the bottom right panel shows the extinction map derived from applying the NICER method applied to NTT near-infrared observations of the most extinguished portion of B68. The graph in the bottom right panel shows the incredible radial-density profile derived from the NICER extinction map (Alves, Lada & Lada 2001). Notice that the fit to this profile shows the inner portion of B68 to be essentially a perfect critical Bonner-Ebert sphere
COMPLETE, Part 1
Observations:2002-- NICER/2MASS Extinction Mapping: dust column density maps ~5 degrees mapped with ~5' resolution
2002-- FCRAO/SEQUOIA 12CO and 13CO Observations: gas temperature, density and velocity information ~40" resolution on all AV>1(COMPLETE Awarded Key Project Status, 10/02)
2003-- SCUBA Observations: dust column density maps, finds all "cold" source ~20" resolution on all AV>6 mag (COMPLETE Awarded Time, 12/10/02)
c2d 2003-- Mid- and Far-IR SIRTF c2d Legacy Observations: dust temperature and column density maps ~5 degrees mapped with ~15" resolution (70 m + NICER on point source distribution)
Science:– Combined Thermal Emission data: dust spectral-energy distributions, giving emissivity, Tdust and Ndust
– Extinction/Thermal Emission inter-comparison: unprecedented constraints on dust properties and cloud distances, in addition to high-dynamic range Ndust map
– Spectral-line/Ndust Comparisons Systematic censes of inflow, outflow & turbulent motions enabled
– CO maps in conjunction with SIRTF point sources will comprise YSO outflow census
5 degrees (~tens of pc)
SIRTF Legacy Coverage of Perseus
COMPLETE, Part 2
(2003-5)
Observations, using target list generated from Part 1:NICER/8-m/IR camera OIR Observations: best density profiles for dust associated with "cores". ~10" resolution FCRAO + IRAM N2H+ Observations: gas temperature, density and velocity information for "cores” ~15" resolution, ongoing beginning 2002
Science:Multiplicity/fragmentation studies
Detailed modeling of pressure structure on <0.3 pc scalesSearches for the "loss" of turbulent energy (coherence)
FCRAO N2H+ map with CS spectra superimposed.
(Le
e,
Mye
rs &
Ta
falla
20
01
).
Is this Really Possible Now?
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Time (hours)
20152010200520001995199019851980
Year
1 Hour
1 Minute
1 Day
1 Second
1 Week
SCUBA-2
SEQUOIA+
NICER/8-m
NICER/SIRTFNICER/2MASS
AV~5 mag, Resolution~1'
AV~30 mag, Resolution~10"
13CO Spectra for 32 Positions in a Dark Cloud (S/N~3)
Sub-mm Map of a Dense Core at 450 and 850 m
1 day for a 13CO map then
1 minute for a 13CO map now
Pilot COMPLETE
Observations in Perseus,Spring 2002
The action of multiple outflows in NGC 1333?
SCUBA 850 mm Image shows Ndust (Sandell & Knee
2001)Dotted lines show CO
outflow orientations (Knee & Sandell 2000)
Perseus according
to IRAS (warm dust!)
QuickTime™ and aTIFF (LZW) decompressorare needed to see this picture.
COMPLETE: SCUBA>10 mag AV
2468
Perseus
Ophiuchus
10 pc
10 pc
Johnstone, Goodman & the COMPLETE team, SCUBA
2003(?!)
~100 hours at SCUBA
COMPLETE SCUBA-Prep led to
Discovery of a Heated Dust Ring in Ophiuchus
Goodman, Li & Schnee 2003
2 pc
…and the famous “1RXS J162554.5-233037” is right in the Middle !?
2 pc
The “COMPLETE” + c2d Truth about Star Formation, c.
2005
Statistical Evaluation of Outflows’ RoleEvaluation of Constructive/Destructive Role of
Explosions/Winds
Tracking down progeny (includes USNO-B work)
All data to NVO
Truth?: Part 1
Part II
Complications
Observing Biases
Temporal Behavior
Regional Variations
Temporal Evolution
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Mass
[M
sun]
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12 3 4 5 6 7 8
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Velocity [km s-1]
Power-law Slope of Sum = -2.7(arbitrarily >2)
Slope of Each Outburst = -2as in Matzner & McKee 2000
Example 1: Episodicity changes Energy/Momentum Deposition (time)
Example 2: (Some) Young stars may zoom through
ISM
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Mass
[M
sun]
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Velocity [km s-1]
1. Episodic Outflows: Steep Mass-Velocity Slopes Result from Summed
Bursts
Power-law Slope of Sum = -2.7(arbitrarily >2)
Slope of Each Outburst = -2as in Matzner & McKee 2000
Arce & Goodman 2001b