Science Drivers for the Square Kilometre Kilometre Arrayaramis.obspm.fr/SKA/meet/Steve-jun09.pdfSKA...
Transcript of Science Drivers for the Square Kilometre Kilometre Arrayaramis.obspm.fr/SKA/meet/Steve-jun09.pdfSKA...
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S.A. Torchinsky 1SKA Science DriversSKA information day, GEPI, Meudon, 16 juin 2009
Science DriversScience Drivers for thefor the
Square Square KilometreKilometre ArrayArray
Steve Torchinsky USN/GEPI
SKADS Project Scientist
www.skads-eu.org
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S.A. Torchinsky 2SKA Science DriversSKA information day, GEPI, Meudon, 16 juin 2009
SKA Key ScienceSKA Key Science
Tests of gravityEpoch of
Reionisation Cosmic Magnetism
Cradle of Life
Large Scale Structure
Transient Universe
The Unknown
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S.A. Torchinsky 3SKA Science DriversSKA information day, GEPI, Meudon, 16 juin 2009
Chris Carilli & SteveSteve RawlingsRawlings, New Astronomy Reviews, Vol.48, Elsevier, Dec. 2004
SKA Science BookSKA Science Book
http://www.skads-eu.org/p/SKA_SciBook.php
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S.A. Torchinsky 4SKA Science DriversSKA information day, GEPI, Meudon, 16 juin 2009
Strong Field Tests of GravityStrong Field Tests of Gravity
Binary orbit permits determination of masses
Relativistic effects permit (re) determination of masses.
ALL MUST AGREE
http://www.jb.man.ac.uk/~pulsar/
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S.A. Torchinsky 5SKA Science DriversSKA information day, GEPI, Meudon, 16 juin 2009
Strong Field Tests of GravityStrong Field Tests of Gravity
•
Large surveys will find exotic binarys–
~20 000 pulsars in the galaxy
–
Nearly edge-on Pulsar –
Black-hole binary (at least one)•
Probe eg. Frame dragging, cosmic censorship, no hair theorem
•
Pulsar timing array–
Gravitational wave background
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S.A. Torchinsky 6SKA Science DriversSKA information day, GEPI, Meudon, 16 juin 2009
Probing the Dark AgesProbing the Dark Ages•
When did the first luminous objects form?
•
How did they form and over what period of time?•
SKA will detect the Epoch of Reionisation and map
the evolution history of the first luminous objects
Di
Matteo
et al
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S.A. Torchinsky 7SKA Science DriversSKA information day, GEPI, Meudon, 16 juin 2009
Cosmic MagnetismCosmic MagnetismFaraday rotation of > 107
polarised background sources
Origin of magnetic fields–
Dynamo?
–
Primordial?
NGC 891 NGC 891 (Krause)(Krause)
M 51 M 51 VLA+EffVLA+Eff 6cm 6cm (Fletcher & Beck)(Fletcher & Beck)
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S.A. Torchinsky 8SKA Science DriversSKA information day, GEPI, Meudon, 16 juin 2009
Large Scale StructureLarge Scale Structure
Billions of galaxies!
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S.A. Torchinsky 9SKA Science DriversSKA information day, GEPI, Meudon, 16 juin 2009
Baryonic Acoustic OscillationsBaryonic Acoustic Oscillations•
Improve signal confidence by measuring wiggles in separate redshift
bins
•
A catalog of a billion galaxies•
Position and redshift
measured simultaneously
•
There are fluctuations at all scales but there is a preferred scale of around 1 deg.
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S.A. Torchinsky 10SKA Science DriversSKA information day, GEPI, Meudon, 16 juin 2009
1%
ComplementarityComplementarity with Planckwith Planck
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S.A. Torchinsky 11SKA Science DriversSKA information day, GEPI, Meudon, 16 juin 2009
G. Bryden
/ NASA
Cradle of LifeCradle of Life•
Protoplanetary
disks resolved to Earth-like orbits
•
Organic molecules–
methanol (834 MHz)
–
acetaldehyde (1.1 GHz)–
acetamide
(9.2 GHz)
–
cyclopropenone
(9.3 GHz)–
propenal
(26 GHz)
•
Extrasolar
planets
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S.A. Torchinsky 12SKA Science DriversSKA information day, GEPI, Meudon, 16 juin 2009
ProjectPhoenix
AllenTelescope
Array
SKA
Jill Tarter
SETI at leakage levels from nearby stars
eg:• planetary radar• Interplanetary
communication• Interstellar
communication
Indicators of Indicators of Extra Terrestrial IntelligenceExtra Terrestrial Intelligence
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S.A. Torchinsky 13SKA Science DriversSKA information day, GEPI, Meudon, 16 juin 2009
TransientsTransients
Start recording…
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S.A. Torchinsky 14SKA Science DriversSKA information day, GEPI, Meudon, 16 juin 2009
Transient signalTransient signal
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S.A. Torchinsky 15SKA Science DriversSKA information day, GEPI, Meudon, 16 juin 2009
TransientsTransients
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S.A. Torchinsky 16SKA Science DriversSKA information day, GEPI, Meudon, 16 juin 2009
Transient signalTransient signal
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S.A. Torchinsky 17SKA Science DriversSKA information day, GEPI, Meudon, 16 juin 2009
TransientsTransients
•
Pulsar is a special case of transient phenomena (periodic)
•
Giant pulses•
Supernova
•
Bursters•
ETI
requires:• fast time constant• memory buffer for post analysis• wide instantaneous, fully-sampled FoV
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S.A. Torchinsky 18SKA Science DriversSKA information day, GEPI, Meudon, 16 juin 2009
Transient signalTransient signal
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S.A. Torchinsky 19SKA Science DriversSKA information day, GEPI, Meudon, 16 juin 2009
The UnknownThe Unknown•
New discoveries always result from observations in new parameter space–
sensitivity
–
spatial resolution–
spectral resolution
–
polarisation–
time domain
–
observing speed (multibeaming)
•
eg. CMB, pulsars, extra solar planets,…
SKA improves all of these
SKA is designed for the Key Projects but with an overriding design philosophy of flexibility to maximise
the likelihood of new discoveries
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S.A. Torchinsky 20SKA Science DriversSKA information day, GEPI, Meudon, 16 juin 2009
Chris Carilli & SteveSteve RawlingsRawlings, New Astronomy Reviews, Vol.48, Elsevier, Dec. 2004
SKA Science BookSKA Science Book
http://www.skads-eu.org/p/SKA_SciBook.php
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S.A. Torchinsky 21SKA Science DriversSKA information day, GEPI, Meudon, 16 juin 2009
Cosmology, Galaxy Formationand Astroparticle
Physics
on the Pathway to the SKA
Hans-Rainer Klöckner, Steve Rawlings,
Matt Jarvis, Angela Taylor (eds.)
Co
smo
log
y, G
ala
xy F
orm
ati
on
an
d A
stro
pa
rtic
leP
hys
ics
on
th
e
Pa
thw
ay
to t
he
SK
A
Available online:
www.skads-eu.org (click “astronomy”
and
“LOSKA2006”)
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S.A. Torchinsky 22SKA Science DriversSKA information day, GEPI, Meudon, 16 juin 2009
Simulations for the SKASimulations for the SKA
image by D. Obreschkow
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S.A. Torchinsky 23SKA Science DriversSKA information day, GEPI, Meudon, 16 juin 2009
Simulations for the SKASimulations for the SKA
Effort in SKADS:•
Catalog of continuum sources (250 Million sources)
•
Epoch of Reionisation
(tomography from z≈15 to z≈6)•
The Cosmic Web
•
Pulsars
•
See SKADS Simulated Skies website–
www.skads-eu.org/p/s-cubed.php
•
See Proceedings of the Pushchino
Meeting–
www.skads-eu.org/p/memos.php
–
And others listed there, available on astro-ph
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S.A. Torchinsky 24SKA Science DriversSKA information day, GEPI, Meudon, 16 juin 2009
SKADS Simulated SkiesSKADS Simulated Skies
s-cubed.physics.ox.ac.uk
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S.A. Torchinsky 25SKA Science DriversSKA information day, GEPI, Meudon, 16 juin 2009
SKADS Simulated SkiesSKADS Simulated Skies
www.skads-eu.org/p/s-cubed.php
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S.A. Torchinsky 26SKA Science DriversSKA information day, GEPI, Meudon, 16 juin 2009
SKADS Publications (1/4)SKADS Publications (1/4)
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S.A. Torchinsky 27SKA Science DriversSKA information day, GEPI, Meudon, 16 juin 2009
SKADS Publications (2/4)SKADS Publications (2/4)
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S.A. Torchinsky 28SKA Science DriversSKA information day, GEPI, Meudon, 16 juin 2009
SKADS Publications (3/4)SKADS Publications (3/4)
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S.A. Torchinsky 29SKA Science DriversSKA information day, GEPI, Meudon, 16 juin 2009
SKADS Publications (4/4)SKADS Publications (4/4)
www.skads-eu.org/p/memos.php
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S.A. Torchinsky 30SKA Science DriversSKA information day, GEPI, Meudon, 16 juin 2009
SKADS Science and Technology SKADS Science and Technology The Universe
Our understanding of the Universe
Sky Simulation (DS2T1)
Convolution with the telescope (DS2T2)
Network simulator (DS3T3)
Technology development
(DS4)
Technology demonstrators
(DS5 & DS6)
observations
brain power
Catalogs, images, EM fields
voltages
mea
sure
men
tsan
dsi
mul
ated
pe
rform
ance
Request spec change
BENCHMARK
Backend data
Data imaging (DS2T2)
Simulated telescope image
Data analysis (DS2)
science goals achievable?
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S.A. Torchinsky 31SKA Science DriversSKA information day, GEPI, Meudon, 16 juin 2009
SKADS Science and TechnologySKADS Science and TechnologyThe Universe
Our understanding of the Universe
Sky Simulation (DS2T1)
Convolution with the telescope (DS2T2)
Network simulator (DS3T3)
Technology development
(DS4)
Technology demonstrators
(DS5 & DS6)
observations
brain power
voltages
mea
sure
men
tsan
dsi
mul
ated
pe
rform
ance
Backend data
Data imaging (DS2T2)
Simulated telescope image
Request spec change
BENCHMARK
Catalogs, images, EM fields
Data analysis (DS2)
science goals achievable?
Consider trade-offs
NO: not technologically feasible
NO: too expensive
YES: We can do better than that !
SKADS Design & Costing
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S.A. Torchinsky 32SKA Science DriversSKA information day, GEPI, Meudon, 16 juin 2009
SKA Design and CostingSKA Design and Costing
•
SKADS final deliverable “Designed and Costed
SKA”•
First memo: detailed design–
www.skads-eu.org/p/memos.php
–
SKA Memo #93–
~1.5BEuro
•
Development of costing tool: SKACost–
Designed and costed
components and subsystems
–
Data base for costing different SKA implementations–
SKADS in collaboration with International SKA Program Office
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S.A. Torchinsky 33SKA Science DriversSKA information day, GEPI, Meudon, 16 juin 2009
•
1st
MCCT School
Medicina
23-29 Sept 2007
•
Wide field imaging and calibration
Groningen 2-7 March
•
Synergies with the SKA
Bonn 14-18 April 2008
•
Deep Field Imaging with SKA
Cambridge 25-29 Aug
•
Radioastronomy
and the New Instruments
Siguenza
27 Aug –
4 Sept
•
Multifield
and multibeam
science with SKA
Oxford 15-27 March 2009
•
Increasing the evolution rate in radio astronomy
Paris 24-28 August 2009
•
Towards 3rd
generation calibration
Nançay
27 Sept –
10 Oct
Training the next generationTraining the next generation
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S.A. Torchinsky 34SKA Science DriversSKA information day, GEPI, Meudon, 16 juin 2009
EMBRACEEMBRACE
•
Electronic MultiBeam
Radio Astronomy ConcEpt•
Aperture-Plane phased-array
•
500MHz –
1500MHz•
Linear polarisation
•
160m2
at Westerbork
•
90m2
at Nançay
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S.A. Torchinsky 35SKA Science DriversSKA information day, GEPI, Meudon, 16 juin 2009
EMBRACE at EMBRACE at NanNanççayay
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S.A. Torchinsky 36SKA Science DriversSKA information day, GEPI, Meudon, 16 juin 2009
EMBRACE at EMBRACE at NanNanççayay
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S.A. Torchinsky 37SKA Science DriversSKA information day, GEPI, Meudon, 16 juin 2009
EMBRACE at EMBRACE at NanNanççayay
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S.A. Torchinsky 38SKA Science DriversSKA information day, GEPI, Meudon, 16 juin 2009
NanNanççayay BeamformerBeamformer ChipChip
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S.A. Torchinsky 39SKA Science DriversSKA information day, GEPI, Meudon, 16 juin 2009
EMBRACE observations of the SunEMBRACE observations of the Sun
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S.A. Torchinsky 40SKA Science DriversSKA information day, GEPI, Meudon, 16 juin 2009
SKA Key ScienceSKA Key Science
Tests of gravityEpoch of
Reionisation Cosmic Magnetism
Cradle of Life
Large Scale Structure
Transient Universe
The Unknown
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S.A. Torchinsky 41SKA Science DriversSKA information day, GEPI, Meudon, 16 juin 2009
ContactContact
Steve TorchinskySKADS Project ScientistUSN/GEPI, Observatoire de Paris
Phone: +33 1 45 07 75 02Email: [email protected]: http://www.skads-eu.org