A Survey of Velocity Features in Perseus Michelle Borkin Senior Thesis Presentation May 12, 2006.

A Survey of Velocity Features in Perseus

Michelle BorkinSenior Thesis Presentation

May 12, 2006

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

Star (and Planet) Formation As We Understand It

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Galaxy

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Star Cluster

Molecular Cloud Complex

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Star-Forming “Globule”

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Extrasolar SystemDisk + Jet

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Stanke, McCaughrean & Zinnecker, 1999

What’s an “HH knot”?HH knots far from sourcemark the ends of bipolar

“jets” or “outflows”

“Giant” Outflows

H. Arce’s Thesis 2001

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

VLSR = 3.4 km/s

3.4 km/s

VLSR = 3.6 km/s

VLSR = 3.8 km/s

VLSR = 4.0 km/s

VLSR = 4.2 km/s

VLSR = 4.4 km/s

VLSR = 4.6 km/s

VLSR = 4.8 km/s

VLSR = 5.0 km/s

VLSR = 5.2 km/s

VLSR = 5.4 km/s

VLSR = 5.6 km/s

VLSR = 5.8 km/s

VLSR = 6.0 km/s

VLSR = 6.2 km/s

VLSR = 6.4 km/s

VLSR = 6.6 km/s

VLSR = 6.8 km/s

VLSR = 7.0 km/s

VLSR = 7.2 km/s

VLSR = 7.4 km/s

VLSR = 7.6 km/s

VLSR = 7.8 km/s

VLSR = 8.0 km/s

VLSR = 8.2 km/s

VLSR = 8.4 km/s

VLSR = 8.6 km/s

VLSR = 8.8 km/s

8.8 km/s

Barnard’s Perseus

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COMPLETE/FCRAO W(13CO)

“Giant” Outflows

H. Arce’s Thesis 2001

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

Spectral Line Outflow Mapping

Usually…

In Extreme Cases… 1.0

0.8

0.6

0.4

0.2

0.0 120100806040200

1.0

0.8

0.6

0.4

0.2

0.0120100806040200 120 100 80 60 40200

1.0

0.8

0.6

0.4

0.2

0.0120 100806040200

Molecular Cloud

Outflows

Note: not drawn to scale.

Star forming core

~ 1pc

HH knots

Outflow lobes

Circumstellar envelope

Circumstellar disc

Protostar

HH jet

Based on H. Arce Thesis 2001.

3D Slicer

3D Slicer

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

Outflow Identification

Red Shifted points

Blue Shifted points

HH Objects

SCF points

IRAS Sources

Known Outflow Sources

I

II

III IV V

VI

New outflows Known outflows or outflow regions

Outflow Identification

Red Shifted points

Blue Shifted points

HH Objects

SCF points IRAS Sources

Known Outflow Sourcesc2d Sources

B5

RA

DE

C

B5

Velocity

DE

C

B5 Results

Summation of all the spectra in Region 1

Summation of the spectra associated with outflows

Summation of all the spectra associated with previously known outflows

Gaussian fit

Region 1 (B5)

B5 ResultsSummation of all the spectra in Region 1

All outflows

previously detected outflows

Gaussian fit

High velocity gasHigh velocity gas from detected outflows

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.

Future Research

Red Shifted points

Blue Shifted points

HH Objects

SCF points

IRAS Sources

Known Outflow Sources

Finish cataloging

Calculate outflow statistics

Questions?

For more information, go to:

http://www.cfa.harvard.edu/COMPLETE/

http://www.cfa.harvard.edu/COMPLETE/astromed/

http://iic.harvard.edu