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GRB050904 at redshift 6.3: observations of the oldest cosmic explosion after the Big Bang: Observations of the oldest cosmic explosion after the Big Bang

  • G Tagliaferri
  • , LA Antonelli
  • , G Chincarini
  • , A Fernandez-Soto
  • , D Malesani
  • , M Della Valle
  • , P D'Avanzo
  • , A Grazian
  • , V Testa
  • , S Campana
  • , S Covino
  • , F Fiore
  • , L Stella
  • , AJ Castro-Tirado
  • , J Gorosabel
  • , DN Burrows
  • , M Capalbi
  • , G Cusumano
  • , ML Conciatore
  • , V D'Elia
  • P Filliatre, D Fugazza, N Gehrels, D Guetta, S Guziy, EV Held, K Hurley, GL Israel, M Jelinek, D Lazzati, A Lopez-Echarri, A Melandri, IF Mirabel, M Moles, A Moretti, KO Mason, J Nousek, J Osborne, LJ Pellizza, R Perna, S Piranomonte, L Piro, AD Postigo, P Romano

نتاج البحث: نشر في مجلةمقالةمراجعة النظراء

119 اقتباسات (Scopus)

ملخص

We present optical and near-infrared observations of the afterglow of the gamma-ray burst GRB 050904. We derive a photometric redshift z = 6.3, estimated from the presence of the Lyman break falling between the I and J filters. This is by far the most distant GRB known to date. Its isotropic-equivalent energy is 3.4 × 1053 erg in the rest-frame 110-1100 keV energy band. Despite the high redshift, both the prompt and the afterglow emission are not peculiar with respect to other GRBs. We find a break in the J-band light curve at tb = 2.6 ± 1.0 d (observer frame). If we assume this is the jet break, we derive a beaming-corrected energy Eγ ∼ (4 ÷ 12) × 1051 erg. This limit shows that GRB 050904 is consistent with the Amati and Ghirlanda relations. This detection is consistent with the expected number of GRBs at z > 6 and shows that GRBs are a powerful tool to study the star formation history UD to very high redshift.

اللغة الأصليةالإنجليزيّة
الصفحات (من إلى)L1-L5
دوريةAstronomy and Astrophysics
مستوى الصوت443
رقم الإصدار1
المعرِّفات الرقمية للأشياء
حالة النشرنُشِر - نوفمبر 2005
منشور خارجيًانعم

بصمة

أدرس بدقة موضوعات البحث “GRB050904 at redshift 6.3: observations of the oldest cosmic explosion after the Big Bang: Observations of the oldest cosmic explosion after the Big Bang'. فهما يشكلان معًا بصمة فريدة.

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