Science and the NVO Overview and Discussion

1
Science and the NVO Overview and Discussion

• Dave De Young
• NVO Project Scientist
• NOAO

NVOSS Aspen September 2006
2
NVO Enters Its Operational Phase

• The First Five Years Develop Infrastructure
• Basic Organizational Structure
• Establish Collaborations
• Develop Software Infrastructure (A Very Large
  Task)
• Expose Astronomers to the Concept
• Develop Some Astronomical Tools
• Goal Simple, Readily Used

3
NVO and The Two Cultures Problem
4
NVO and The Two Cultures Problem

• First Five Years Infrastructure
• Strong Emphasis on Software Development
• Strong Emphasis on IT Approach
• NVO as a Software Sandbox
• Do It Because Its Cool
• But The Goal of the NVO Is Enabling Science Not
  Developing Software
• First Step Acceptance by Community

5
Some Requirements for Community Acceptance

• Most Astronomers DO NOT
• Understand Java
• Understand HTML/XML
• Care About Elegant Code
• Often Use SQL
• Most Astronomers DO
• Want the Fastest, Easiest Way to Do Their Science

6
Some Requirements for Community Acceptance

• Ease of Access
• No Jargon, No TLAs
• Whats a Registry?
• Data
• Ease of Access
• Multi-Wavelength
• Catalogs, Images, Spectra, Time Series
• Ability to Combine and Analyse

7
Some Requirements for Community Acceptance

• Tools
• Simple, Useful
• 90-10 Rule
• Majority of Astronomers Observers, Optical,
  Stellar Astronomy
• Role of Power Users
• Small Numbers, Big Projects, High Visibility
• Services
• Easy to Use, Relevant, Reliable

8
NVO Science New Capabilities

• Large Scale Surveys 1 10 Tb
• New Facilities 10 Tb/day
• High Bandwidth Data Transmission
• All Imply a New Paradigm for Research
• Cross Match of 1 10 Million Objects
• New Patterns in Statistics
• New Relations Unseen Physical Processes
• Serendipity

9
NVO Science Some Examples

• Radio-Loud AGN in the SDSS
• Best et al. 2005
• Cross Match SDSS DR2, NVSS, FIRST
• SDSS Spectral Data
• 2712 Radio Galaxies
• Radio Emission Due to
• AGN vs Star Bursts

10
NVO Science Some Examples

• Is There an AGN Starburst Connection?
• (Heckman et al.2006)
• Does a Common Accretion Torus Produce Both?
• Both Phenomena Produce X-rays
• Cross Correlate 80,000 X-ray Sources with gt
  500,000 Galaxies (with z) From SDSS DR4
• Look for Common Hosts
• Look for Evolution with Redshift

11
NVO Science Some Examples

• Detecting Embedded Intermediate Mass Stars
• (Kerton et al. 2006)
• Star of 5-10 Mo At Boundary Between Solar Type
  and Very Massive Stars
• Hence Crossover of Different Physical Processes
• Young B Stars Buried in Molecular Clouds
• Radio mm Spectral Line Surveys 2MASS, IRAS
• Data Cube Analysis (x-y-?)

12
NVO Science Some Examples

• Merging Galaxies
• (Allam et al. 2006)
• Galaxy Mergers Create Starbursts, Form Central
  CDs in Clusters, Feed AGN, Produce ULIRGS.
• Optical (SDSS) Surveys Bias toward High SFR
• IR Traces Mass Distribution (Red Stars)
• Search 2MASS XSC (1.6M Galaxies)
• Expect 30,000 Merging Pairs
• Do Multi Wavelength Followup

13
NVO Science Integration of Theory and
Observations

• Why Theory
• Basic to Scientific Inquiry
• Why NVO Theory
• Large Scale Theory Simulations 10s of TB and
  Rising
• Virtual Telescope/Instrument Projects

14
NVO Science Integration of Theory and
Observations

• Goal Translate Theory Results to Observational
  Parameters
• Cross Match Theory Surveys and Observational
  Surveys
• Interaction Direct New Observations
• Direct New Theory Work

15
N Body Simulations of Globular Cluster Evolution

16
N Body Simulations of Globular Cluster Evolution

17
Collimated Outflows from AGN

• M 87

18
Collimated Outflows from AGN

• 3C 405 Cyg A

19
Collimated Outflows from AGN

• 3C 175

20
Collimated Outflows from AGN

• 3C 31

21
MHD Simulations of Collimated Outflows from AGN
Virtual Telescope Observations
Radio
Electrons
Compare with Radio Archives
VLA
22
MHD Simulations of Collimated Outflows from AGN
Virtual Telescope Observations
IC-CMB
SSC
Compare with Chandra Archives
Chandra
23
Clusters of Galaxies and Cooling Flows

• A 1689

24
Clusters of Galaxies and Cooling Flows

• Perseus Cluster

25
Clusters of Galaxies and the Cooling Flow
Problem

• N1275

Fabian et al. 2000
26
Clusters of Galaxies and the Cooling Flow
Problem

• Can Reheating of the Intracluster Medium
• by AGN Solve the
• Cooling Flow
• Problem?

27
Models of Buoyant Radio Source Bubbles
Density

• 2-D Hydrodynamic
• Abundant
• Mixing!

X-Y High Resolution
Brueggen Kaiser 2002
28
Non-Linear R-T Instability

• t 0

Beta 1.3 M
Beta 1.3 K
Beta 130
1 kpc slices T 10M K t 15 Myr
29
Evolution of Cluster Bubbles Including MHD
Beta 120
30
Three Dimensional MHD Calculations

• ? 3000

31
Relic Radio Bubbles in Galaxy Clusters

• N1275

Compare with Chandra Archives
Fabian et al. 2000
32
Summary

• To Date VO Establishes Infrastructure
• Almost Done
• Tomorrow VO Enables New Science
• The Transition is Now
• Carry Forward Infrastructure Development
• Change Culture to Science Implementation
• Engage Astronomical Community
• What Science do YOU Want to Do?