The radial distribution of millisecond pulsars in 47 Tuc

GÜRKAN M. A., Rasio F.

Conference on New Horizons in Globular Cluster Astronomy, Padua, İtalya, 24 - 28 Haziran 2002, cilt.296, ss.300-301 identifier

  • Yayın Türü: Bildiri / Tam Metin Bildiri
  • Cilt numarası: 296
  • Basıldığı Şehir: Padua
  • Basıldığı Ülke: İtalya
  • Sayfa Sayıları: ss.300-301
  • Orta Doğu Teknik Üniversitesi Adresli: Hayır

Özet

Recent observations of 47 Tuc have revealed a large population of compact objects. Spectral analysis suggests that most of the soft X-ray sources observed by Chandra are millisecond pulsars. However, the observed radio millisecond pulsars are much more centrally concentrated, and the probability of this happening by chance is very low. Using our Monte Carlo code "StarFokker" to simulate the dynamical evolution of the cluster, we show that the diffusion time out of the core is very long, and this could explain the observed distribution if the formation of millisecond pulsars took place in the core similar to 10(9) years ago.