Supernovae and the Ap phenomenon

Journal of Astrophysics and Astronomy - Tập 1 - Trang 155-164 - 1980
R. Rajamohan1, Ashok K. Pati1
1Indian institute of Astrophysics, Bangalore

Tóm tắt

We put forward evidence that relates the phenomenon of the chemically peculiar stars of the upper main sequence to Supernovae explosions in young clusters. In the Upper Scorpius region we find that a supernova shell has interacted with dense clouds and that the peculiar stars lie close to or along the edges of interaction. We argue that the stars at or near the cloud faces are capable of acquiring this enriched material which is sufficiently slowed down. The magnetic accretion process of Havnes and Conti provides the mechanism of acquisition. This process with the associated magnetic braking accounts for the build-up in abundance anomalies and the slowing down of rotation with age.

Tài liệu tham khảo

Abt, H. A. 1979,Astrophys. J.,230, 485. Adelman, S. J. 1973,Astrophys. J.,183, 95. Bertiau, F. C. 1958,Astrophys. J.,128, 533. Blaauw, A. 1964,A. Rev. Astr. Astrophys.,2, 213. Blake, J. A., Schramm, D. N., Kuchowicz, A. 1974,Bull. Am. astr. Soc,6, 282. Catalano, F. A. 1975, inIAU Coll. 32: Physics of Ap-Stars, Eds W. W. Weiss, H. Jenkner and H. J. Wood, Universitatssternwarte Wien, p. 63. Chevalier, R. A. 1974,Astrophys. J.,188, 501. Cowley, C. R. 1975,in IAU Coll. 32: Physics of Ap-Stars, Eds W. W. Weiss, H. Jenkner and H. J., Wood, Universitatssternwarte Wien, p. 275. Dolginov, A. Z. 1975, inIAU Coll. 32: Physics of Ap-Stars, Eds W. W. Weiss, H. Jenkner and H. J. Wood, Universitatssternwarte Wien, p. 43. Garrison, R. F. 1967, Astrophys. J.,147, 1003. Guthrie, B. N. G. 1968,Publ R. Obs. Edinburgh,6, 145. Havnes, O. 1974,Astr. Astrophys.,32, 161. Havnes, O. 1975, inIAU Coll. 32: Physics of Ap-Stars, Eds W. W. Weiss, H. Jenkner and H. J. Wood, Universitatssternwarte Wien, p. 135. Havnes, O., Conti, P. S. 1971,Astr. Astrophys.,14, 1. Herbst, W., Assousa, G. E. 1977,Astrophys. J.,217, 473. Hobbs, L. M. 1969,Astrophys. J.,157, 135. Johnson, H. M. 1966,Astrophys. J.,144, 635. Johnson, H. M. 1970,Astrophys. J.,160, 193. Johnson, H. M. 1971,Astrophys. J.,164, 67. Kerr, F. J. 1976, inIAU in Symp. 75: Star Formation, Eds T. De Jong and A. Maeder, D. Reidel, Dordrecht, p. 3. Kuchowicz, B. 1975, inIAU Coll. 32: Physics of Ap-Stars, Eds W. W. Weiss, H. Jenkner and H. J. Wood, Universitatssternwarte Wien, p. 169. Kutner, M. L., Tucker, K. D., Chin, G., Thaddeus, P. 1977,Astrophys. J.,215, 521. Maeder, A. 1972, inIAU Coll. 17: Age des Etoiles, Eds G. Cayrel and A. M. Delplace, Paris-Meudon Observatory, p. XXIV-1. McGee, R. X., Murray, J. D., Milton, J. A. 1963,Austr. J. Phys.,16, 136. Mestel, L. 1975, inIAU Coll. 32: Physics of Ap-Stars, Eds W. W. Weiss, H. Jenkner and H. J. Wood, Universitatssternwarte Wien, p. 1. Michaud, G. 1970,Astrophys. J.,160, 641. Michaud, G. 1975, inIAU Coll. 32: Physics of Ap-Stars, Eds W. W. Weiss, H. Jenkner and H. J. Wood, Universitatssternwarte Wien, p. 81. Pendl, E. S., Seggeswiss, W. 1975, inIAU Coll. 32: Physics of Ap-Stars, Eds W. W. Weiss, H. Jenkner and H. J. Wood, Universitatssternwarte Wien, p. 357. Rajamohan, R. 1976,Pramana,7, 160. Rajamohan, R. 1978,Mon. Not. R. astr. Soc.,184, 743. Rajamohan, R., Venkatakrishnan, P. 1979, inIAUSymp. 88: Close Binary Stars, Eds M. J. Plavec, D. M. Popper and R. K. Ulrich, D. Reidel, Dordrecht, p. 27. Rajamohan, R., Venkatakrishnan, P. 1980, In preparation. Reeves, H. 1972,Astr. Astrophys.,19, 215. Reynolds, R. J., Ogden, P. M. 1978,Wisconsin Astrophys, No. 81. Sancisi, R. 1974, inIAU Symp. 60: Galactic Radio Astronomy, Eds F. J. Kerr and S. C. Simonson, D. Reidel, Dordrecht, p. 115. Sancisi, R., Van Woerden, H. 1970,Astr. Astrophys.,5, 135. Schramm, D. N. 1973, inExplosive Nucleosynthesis, Eds D. N. Schramm and W. D. Arnett, University Texas Press, p. 84. Schramm, D. N. 1978, inProtostars and Planets, Ed. T. Gehrels, Univ. of Arizona Press, p. 384. Sivan, J. P. 1974,Astr. Astrophys. Suppl. Ser.,16, 163. Slettebak, A. 1968,Astrophys. J.,151, 1043. Swings, J. P., Preston, G. W. 1978,Astrophys. J.,220, 883. Thaddeus, P. 1976, inIAU Symp. 75: Star Formation, Eds T. De Jong and A. Maeder, D. Reidel, Dordrecht, p. 37. Truran, J. W. 1967, inSupernovae and their Remnants, Eds P. J. Brancazio and A. G. W. Cameron, Gordon and Breach, New York, p. 111. van Rensbergen, W., Hammerschlag-Hensberge, G., van den Heuvel, E.P.J. 1978,Astr. Astrophys.,64, 131. Wallerstein, G. 1967,Astrophys. Lett.,1, 31. Weaver, T. A., Zimmerman, G. B., Woosley, S. E. 1978,Astrophys. J.,225, 1021. Wolff, S. C., Wolff, R. J. 1975, inIAU Coll. 32: Physics of Ap-Stars, Eds W. W. Weiss, H. Jenkner and H. J. Wood, Universitatssternwarte Wien, p. 503.