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ISO Use Cases
- using ISOCAM images
- IR can indicate warm dust from young YSO (taken with other diagnostics)
- AVO method - direct access to ISO archive using SIA
- using LWS spectra, Pezzuto et al. 2002 MNRAS 330 1034
- 2-colour [60-100] v. [100 - 170] Pezzuto et al.'s YSO colour classification
- Distinguishes Class 0, I, II
- AVO Method
- Use SSA (VOdemo tab) to discover spectra from ISO Archive
- Selected spectra are automatically loaded into SpecView
- Measure flux density in Jy at 60, 100, 170 um
- Load SpecView log file, VOPlot is started automatically
- Make colours e.g. [60-100] = log(F_100/F_60)
- using LWS low res Nisini et al. ApJ 2002 574 246
- Class 0 - water (also see Ceccarelli et al. 1999 A&A 342 L21 and Caux et al. 1999 USIS ESA SP-427 643 - H2O and CO in excitation states detected by LWS probably comes from warm regions closer to protostar than SiO and maser transitions from high-mass YSO outflows)
- NHC1333 IRAS4 Spectrum of Class 0 source with transitions labelled kindly supplied by ISO scientists.
- Class I - no water (upper limit [H2O]<10E-5) but CO still seen
- AVO method
- Use SSA (VOdemo tab) to discover spectra from ISO Archive
- Selected spectra are automatically loaded into SpecView
- Inspect 160-190 um region
- ISOGAL survey
- Galactic Plane:Felli et al. 2002 A&A 392 971 [15]<4.5 [7]-[15]>1.8 [7] < 6 (and K - [7] > 4) (3"-6")
- See Felli et al. 2000 A&A 362 199 for high glat criteria FELLI et al.'s YSO colour selection
- AVO method
- ISOGAL catalogue is available in Vizier (Omont+ 2003)
- Use VOPlot
- [7-15] colour is expression 1.65-(log(F_7/F_15))/0.4
- Filter to select candidates
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