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A Survey of Velocity Features in Perseus

A Survey of Velocity Features in Perseus. Michelle Borkin Senior Thesis Presentation May 12, 2006. A Survey of Velocity Features in Perseus. Visualize 12 CO data cube in 3D Slicer. Mark high velocity points in 3D space, and export to astronomical software.

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A Survey of Velocity Features in Perseus

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  1. A Survey of Velocity Features in Perseus Michelle BorkinSenior Thesis PresentationMay 12, 2006

  2. A Survey of Velocity Features in Perseus Visualize 12CO data cube in 3D Slicer Mark high velocity points in 3D space, and export to astronomical software Identify outflows and calculate statistics

  3. Galaxy Star (and Planet) Formation As We Understand It Molecular Cloud Complex Star Cluster Extrasolar System Disk + Jet Star-Forming “Globule”

  4. What’s an “HH knot”? HH knots far from source mark the ends of bipolar “jets” or “outflows” Stanke, McCaughrean & Zinnecker, 1999

  5. “Giant” Outflows Greyscale shows ambient 1000 ptcl/cc gas Red shows 100 ptcl/cc gas moving away from us Blue shows 100 ptcl/cc gas moving toward us H. Arce’s Thesis 2001

  6. VLSR = 3.4 km/s 3.4 km/s

  7. VLSR = 3.6 km/s

  8. VLSR = 3.8 km/s

  9. VLSR = 4.0 km/s

  10. VLSR = 4.2 km/s

  11. VLSR = 4.4 km/s

  12. VLSR = 4.6 km/s

  13. VLSR = 4.8 km/s

  14. VLSR = 5.0 km/s

  15. VLSR = 5.2 km/s

  16. VLSR = 5.4 km/s

  17. VLSR = 5.6 km/s

  18. VLSR = 5.8 km/s

  19. VLSR = 6.0 km/s

  20. VLSR = 6.2 km/s

  21. VLSR = 6.4 km/s

  22. VLSR = 6.6 km/s

  23. VLSR = 6.8 km/s

  24. VLSR = 7.0 km/s

  25. VLSR = 7.2 km/s

  26. VLSR = 7.4 km/s

  27. VLSR = 7.6 km/s

  28. VLSR = 7.8 km/s

  29. VLSR = 8.0 km/s

  30. VLSR = 8.2 km/s

  31. VLSR = 8.4 km/s

  32. VLSR = 8.6 km/s

  33. VLSR = 8.8 km/s 8.8 km/s

  34. COMPLETE/FCRAO W(13CO) Barnard’s Perseus

  35. “Giant” Outflows Greyscale shows ambient 1000 ptcl/cc gas Red shows 100 ptcl/cc gas moving away from us Blue shows 100 ptcl/cc gas moving toward us H. Arce’s Thesis 2001

  36. Spectral Line Outflow Mapping 1.0 0.8 1.0 1.0 0.6 0.8 0.8 0.4 0.6 0.6 0.4 0.4 0.2 0.2 0.2 0.0 0.0 0.0 0 20 40 60 80 100 120 100 120 80 60 40 20 0 0 20 40 60 80 100 120 120 40 20 60 0 80 100 Usually… In Extreme Cases…

  37. Outflows HH knots HH jet Star forming core Circumstellar envelope Outflow lobes Circumstellar disc Protostar ~ 1pc MolecularCloud Note: not drawn to scale. Based on H. Arce Thesis 2001.

  38. 3D Slicer

  39. 3D Slicer

  40. A Survey of Velocity Features in Perseus Visualize 12CO data cube in 3D Slicer Mark high velocity points in 3D space, and export to astronomical software Identify outflows and calculate statistics

  41. Outflow Identification I III IV V VI II Known outflows or outflow regions New outflows IRAS Sources Red Shifted points HH Objects Known Outflow Sources SCF points Blue Shifted points

  42. Outflow Identification Red Shifted points HH Objects Known Outflow Sources c2d Sources IRAS Sources SCF points Blue Shifted points

  43. B5 DEC RA

  44. B5 DEC Velocity

  45. B5 Results Summation of all the spectra in Region 1 Gaussian fit Summation of the spectra associated with outflows Summation of all the spectra associated with previously known outflows Region 1 (B5)

  46. B5 Results High velocity gas High velocity gas from detected outflows Summation of all the spectra in Region 1 Gaussian fit All outflows previously detected outflows

  47. Results and Conclusions • 216 high velocity points were identified across Perseus • In the three regions cataloged, 20 new outflows were found • 1 new shell was found spanning Regions 5 and 6 (across L1448 and NGC 1333) • Known outflows do not account for all of the observed high velocity gas.

  48. Future Research Finish cataloging Calculate outflow statistics IRAS Sources Red Shifted points HH Objects Known Outflow Sources SCF points Blue Shifted points

  49. Questions? For more information, go to: http://www.cfa.harvard.edu/COMPLETE/ http://www.cfa.harvard.edu/COMPLETE/astromed/ http://iic.harvard.edu

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