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

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!

Get My Free Ebook


Post a comment