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Analysis of a Blowout in Galaxy NGC 3628 Using Infrared Polarization. By Megan Teckman 2002 - 2003. Introduction. The question addressed in this project was whether a blowout exists in galaxy NGC 3628. M 82. Spiral galaxy Edge on Dust belt Radio and X-ray emissions Magnetic field - PowerPoint PPT Presentation
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Analysis of a Blowout in Galaxy Analysis of a Blowout in Galaxy NGC 3628 Using Infrared NGC 3628 Using Infrared
PolarizationPolarizationBy Megan Teckman
2002 - 2003
Introduction
• The question addressed in this project was whether a blowout exists in galaxy NGC 3628.
• M 82
• Spiral galaxy • Edge on • Dust belt • Radio and X-ray emissions• Magnetic field• Dust• IR • Blowout
Purpose
• The purpose of this project was to ratify the existence of a blowout by mapping the magnetic field using images taken in polarized IR.
Image from http://www.ifa.hawaii.edu/mko/maunakea.htm
NASA Infrared Telescope Research Facility
Mauna Kea, Hawaii
Methods
• Infrared Reduction and Analysis Facility (IRAF).
• Cropping & sorting.
• Sky Subtraction
Original Galaxy Image
Surrounding Sky
Sky-subtracted Image
- =
• Creating Flat Fields • Averaging
“Lights On” “Lights Off” “Flat”- =
• Fixing Pixels (fixpix)• Normalizing
• Flat Fielding• Centering• Shifting
• Smoothing• Masking• Translating
• Axum vector plotting
Results
Discussion
• The magnetic field skewed perpendicularly • Suggests blowout• The practical applications
– expanded knowledge– effectiveness of analyses
Further Study
• 3 x 3 pixel box• Observation of the brighter regions
Acknowledgments
• Dr. Terry Jay Jones
• April Homich and Garret Kuchta
• Mrs. Lois Fruen and Ms. Chelen Johnson
• Dr. Dave Thomas and Dr. Ian Armitage
• Team Research