Abstract Details
| Name: KM Hiremath Affiliation: Formerly Indian Institute of Astrophysics Conference ID: ASI2019_32 Title : Spin angular momentum of sun like stars that harbor planets: Inference of sun's core rotation Authors and Co-Authors : Hiremath, K. M and Shashanka Gurumath Abstract Type : Poster Abstract Category : Sun and the Solar System Abstract : Recent ground and space based precise photometric and radial velocity observations discovered many stars that harbor planets. In the present study, sun like stars that harbor planets are considered, with the following three cases, spin angular momenta are estimated: (i) whole star rotates rigidly, (ii) convective envelope rotates differentially, core rotates independent of latitude but its radial rotation rate decreases from surface to core and, (iii) convective envelope rotates differentially, core rotates independent of latitude but its radial rotation rate increases from surface to core. With these three cases, spin angular momenta of host stars (that harbor) planets are computed and inferences regarding low surface spin of the sun and magnitude of solar core rotation rate are obtained. It is confirmed that: (i) during the early history of the solar system, sun might have transferred its spin angular momentum (simultaneously mass accretion on to the sun) to the proto planets and, (ii) sun's core rotates nearly 4 times faster compared to the surface rotation. |