## Example

Example 11.1 An interstellar cloud has a mass of one solar mass and density of 1010 hydrogen atoms per cm3. Its rotation period is 1000 years. What is the rotation period after the cloud has condensed into a star of solar size?

Fig. 11.14. Neutron capture paths for the s-process and r-process (from left to right). The s-process follows a path along the line of beta stability. The stable r-process nuclei (small circles) result from beta decay of their neutron rich progenitors on the shaded path shown lower. Beta decay occurs along straight lines A = const. The closed neutron shells in nuclei at N = 50, 82 and 126 correspond to abundance peaks in s-process nuclei at A = 88, 138 and 208, and in r-process nuclei at A = 80, 130 and 195. (Seeger, P.A., Fowler, W.A., Clayton, D.D. (1965): Astrophys. J. Suppl. 11, 121)

Fig. 11.14. Neutron capture paths for the s-process and r-process (from left to right). The s-process follows a path along the line of beta stability. The stable r-process nuclei (small circles) result from beta decay of their neutron rich progenitors on the shaded path shown lower. Beta decay occurs along

The angular momentum is L = Irn, where rn is the angular velocity and I is the moment of inertia. For a homogeneous sphere where M is the mass and R the radius. From the conservation of the angular momentum we get

## Telescopes Mastery

Through this ebook, you are going to learn what you will need to know all about the telescopes that can provide a fun and rewarding hobby for you and your family!

## Post a comment