On the outbursts of black hole soft X-ray transients

Creative Commons License

Ertan U., Alpar M.

ASTRONOMY & ASTROPHYSICS, cilt.393, sa.1, ss.205-214, 2002 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 393 Sayı: 1
  • Basım Tarihi: 2002
  • Doi Numarası: 10.1051/0004-6361:20020998
  • Dergi Adı: ASTRONOMY & ASTROPHYSICS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.205-214
  • Anahtar Kelimeler: accretion, accretion disks, instabilities, stars : binaries : cose, X-rays : general, IRRADIATED ACCRETION DISKS, LIMIT-CYCLE MECHANISM, LIGHT CURVES, THERMAL-INSTABILITY, SECONDARY MAXIMA, MODEL, EVOLUTION, EVAPORATION, BINARIES, CLUES
  • Orta Doğu Teknik Üniversitesi Adresli: Hayır

Özet

We suggest a new scenario to explain the outburst light curves of black hole soft X-ray transients together with the secondary maximum and the bump seen on their decay phases. Our explanations are based on the disk instability models considering the effect of X-ray irradiation. The scenario is consistent with the observed X-ray delays by a few days with respect to the optical rise for both the main outburst and the later maxima. We test our scenario by numerically solving the disk diffusion equation. The obtained model curve fits well to the observed X-ray outburst photon flux curve of the black hole soft X-ray transient GS/GRS 1124-68, a typical representative of the four BH SXTs with very similar light curves.