EUROVO FC

AVO
SWG
Management
Science
Standards
Technology
Reports&Minutes
Forum
Events
Contacts
Help

EGG

Main

Know

Test

TWiki

Chamaeleon SFR

Chamaeleon SFR near PMS star HD97048

Links in normal type are to Aladin screenshots on wiki page http://www.euro-vo.org/twiki/bin/view/Avo/ChamaeleonWorkflow

• Target HD97048
• Default search radius unless specified
• Load > VOdemo tab
  • SIA server for ISO Images (direct from the ISO Archive)
    • Load ISO CAM01 SE
• Load > Aladin tab, tree view
  • Load 2MASS K image covering central stars
• Main window
  • Select ISO image and make contours (default settings)
• Load > Surveys in Vizier
  • Load 2MASS
• Make sure contours and catalogue are higher in stack, use zoom window to shift 2MASS field of view to select region with ISO contours (2/3 magnification).
  • Note about a dozen ISO sources (YSO, HH objects etc.)
  • Select all 2MASS catalogue sources in view
• Plugins > VOPlot (developed by VO India)
  • Functions menu in VOPlot
    • VOPlot Create Filters (to exclude points if Kmag error > 0.2)
      • Name Kaccurate, expression $19<0.2
    • Create New Columns to make colours
      • Name J-H, expression $3-$4, units mag
      • Name H-K, expression $4-$5
  • Select Y-axis J-H, X-axis H-K, Filter Kaccurate and Plot
• In main Aladin window,
  • Select and/or hover over HD97048 and other 2 central ISO/2MASS objects
  • Note positions in VOPlot
  • Compare with JHK colour-colour regions Haisch et al. 2000 AJ 120 1396 fig 8a: high resolution or page-sized
    • HD97048 probably Class II, other objects II and I or II
  • VOPlot Mode
    • Clear all Selections
    • Select
    • Use cursor (drag from top left) to select various regions in VOPlot colour-colour plot, e.g. Class III have [J-H]<1.6 and [H-K]<0.4
    • Note distribution in Aladin image, e.g. Class III not ISO-bright
• Central 3 objects
  • All bright at K-band and ISO 7 um
  • HD97048 maybe more evolved, later class?
  • Or evolving faster - higher mass?
• Load > VOdemo tab
  • SIA Server for XMM-Newton Archive
  • Load EPN images 0.5-2.0, 2.0-4.5, 4.5-7.5 keV
• Make X-ray RGB image
• Zoom in on central objects
  • HD97048 faint very soft
    • suggests high-mass evolved YSO
  • Two objects above have bluer=harder X-ray colours
    • suggests early, embedded YSO
  • Other objects with redder=softer X-ray colours
    • suggests low-mass T Tauri stars

-- AnitaRichards - 26 Jan 2004

Attachment Action Size Date Uploaded by Comment CHAMAELEON.png manage 10.8 K 26 Jan 2004 - 09:10 AnitaRichards Workflow for AVO investigation of Chamaeleon