Application of Radiation Transfer Model to Simulated Molecular Clouds Chuang,Hui-Wen Supervisor: Allen,Anthony Helper:Minho Choi Date:Aug27, 2002

Outline: Fortran Model of cloud core by Li and Shu Discuss column density My simulation How to compare with observors Conclusion

Magnetized singular isothermal toroids ZHI-YUN LI AND FRANK H.SHU 1996

column density= dl

H 0 =0 Theta=0 o H 0 =0 Theta=30 o H 0 =0 Theta=60 o H 0 =0 Theta=90 o

What’s n / H o ? N=4H o H o is a nondimensional parameter,which characterizes the proportion of support provided against self-gravity by poloidal magnetic fields relative to that of gas pressure.

H 0 =0.25 Theta=0 o H 0 =0.25 Theta=30 o H 0 =0.25 Theta=60 o H 0 =0.25 Theta=90 o

H 0 =0.5 Theta=0 o H 0 =0.5 Theta=30 o H 0 =0.5 Theta=60 o H 0 =0.5 Theta=90 o

H 0 =1 Theta=0 o H 0 =1 Theta=30 o H 0 =1 Theta=60 o H 0 =1 Theta=90 o

H 0 =1.5 Theta=0 o H 0 =1.5 Theta=30 o H 0 =1.5 Theta=60 o H 0 =1.5 Theta=90 o

n H o Column density at center *10 23 (cm -2 ) *10 23 (cm -2 ) *10 23 (cm -2 ) *10 23 (cm -2 ) *10 23 (cm -2 ) The column density of the cloud core’s center

H o =0 a/b= H o =0.25 a/b=

H o =0.5 a/b= H o =1 a/b=

H o =1.5 a/b= H o a/b

Average: =10 o,20 o,30 o,40 o, 50 o,60 o,70 o,80 o,90 o WRONG

A=r 2 =2r2r2 =cos -1 q q is between 0 and 1.0 cos 1 2

Conclusion: What I did *familiar with fortran *how to calculate the ratio of a/b (using q) Future work *how to compare with observations

Appreciation: Tony Minho Jeremy NaOMi Takakuwa Pin Gao Summer students ^____^ All my friend here