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GALACTIC PLANE

Canadian Galactic Plane Survey (datacubes)

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

• Default search radius unless specified
• Load > VOtest
  • IDHA tree CGPS MF2 (region close to S140 SFR)
  • CO Slice click to get info frame and use slider to select and load planes at Vlsr 3.5 and -3.1 km/s (planes 69 and 77)
    • Make 'rgb' with more red-shifted plane red, blue-shifted blue
  • Move field of view in Zoom window to examine NW part of image, see CO jets likely to be from high-mass YSO

• Follow-up with other data - not part of Demo
  • Add CO slice at 0.2 km/s (73) and make RGB with new plane green
• Load > Vizier Catalogue Server
  • Grab Coordinates and select Wavelength Radio.
  • Select and load *J/A+AS/134/115 Slysh et al. 1999 CH3OH (methanol is only common maser exclusively associated with star-forming regions)
    • J/ApJ/51/852 Heyer et al. 2001 CO properties
• Note that CH3OH velocity is 0.0 km/s so probably associated with region or with core (?disc?) rather than jets
• Turn off CH3OH catalogue and select CO points around jets. Note a wide spread of Vlsr - some are back/foreground sources.
  • Use Aladin filter to select sources with Vlsr >-3.5 and <+3.5 kms/s
  • Apply filter and select in Aladin window
• Plugins > VOPlot
  • Plot Tpeak against Vlsr
  • Notice relatively warm CO source (11.5 K) at -1 km/s close to CH3OH source - core?
    • but NB resolution is very coarse - arcmin...
• Other CGPS data include HI datacubes and IRAS 4-band data (useful for searching for hot cores)
• Also see Load > SSS
  • Select region in S Galactic plane
  • SuperCosmos Halpha Survey, load
    • UKST Halpha
    • UKST Short Red
  • Make 'rgb' image with Halpha red, Short Red green, to see Halpha-only in red.
• Could compare with e.g. ISOGAL survey (Vizier) to look for YSO (see Omont 2003, and Felli et al. 2002 A&A 392 971 for interpretation of ISOGAL data in Galactic plane.
• Radio continuum images e.g NVSS and catalogues from several maser surveys are accessible, the detection/not of excited OH and/or Methanol are SFR indicators and are useful in these very crowded and obscured regions.

These data and tools are useful in preparation for the Spitzer Glimpse

-- AnitaRichards - 26 Jan 2004

Attachment Action Size Date Uploaded by Comment GALACTICPLANE.png manage 6.9 K 26 Jan 2004 - 09:12 AnitaRichards Galactic Plane workflow diagram