University of Illinios, Jesus Rivera Caltech, Rutgers...
Transcript of University of Illinios, Jesus Rivera Caltech, Rutgers...
Detection of 12CO and 13CO of NGC6764
Yixian Cao1
Gina Duggan2
Jesus Rivera3
CARMA Summer School 2013
1University of Illinios, 2Caltech, 3Rutgers University
● Observed spriral barred galaxy NGC6764● Detect 13CO and 12CO lines ● 12CO/13CO ratio can give us insight into the
physics of the galaxy● Used MIRIAD to reduce and analyze data
Introduction and Motivation
NGC6764
http://www2011.mpe.mpg.de/ir/ALFA/ngc6764.html
Zero and First Moment Maps 12CO(1-0)
Zero and First Moment Maps 13CO(1-0)
12CO and 13CO mom0 maps
R(12CO/13CO) map
Zero Moment for 12CO(1-0)
Position Velocity Map 12CO(1-0)
Spectra 12CO(1-0)
Zero Moment for 13CO(1-0)
Spectra 13CO(1-0)
12CO(1-0) 13CO(1-0)
12CO(1-0) 13CO(1-0)
12CO(1-0) and 13CO(1-0)
it’s scaled, so technically 12CO/average(12CO) and 13CO/average(13CO)
A B C
D E
Spectra Ratio of 12CO(1-0)/13CO(1-0)
for 5 Spectral Windows
Conclusion● Integrated spectral line ratio of 12CO/13CO
calculated was ~19.13 (compared to 18+-4)
Eckart, A., Cameron, M., Jackson, J. M., Genzel, R., Harris, A. I., Wild, W., Zinnecker, H. 1991, ApJ, 372, 67
Thanks CARMA Summer School staff and students!