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Afterglow Plateau and Energy Injection from Magnetar: A Clue to Cosmological Standard Candles

Afterglow Plateau and Energy Injection from Magnetar: A Clue to Cosmological Standard Candles. M. Xu and Y. F. Huang Department of Astronomy, Nanjing University, China 2011.03.07. The Prompt Activity of Gamma-Ray Bursts: their Progenitors, Engines, and Radiation Mechanisms. Raleigh, NC.

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Afterglow Plateau and Energy Injection from Magnetar: A Clue to Cosmological Standard Candles

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  1. Afterglow Plateau and Energy Injection from Magnetar: A Clue to Cosmological Standard Candles M. Xu and Y. F. Huang Department of Astronomy, Nanjing University, China 2011.03.07 The Prompt Activity of Gamma-Ray Bursts: their Progenitors, Engines, and Radiation Mechanisms Raleigh, NC

  2. Outline Afterglow Plateau Energy Injection (EI) from Magnetar LT correlation LTE correlation Cosmological Standard Candles

  3. Canonical X-ray afterglow light curve Zhang et al. 2006; Nousek et al. 2006

  4. Energy Injection from Magnetar Energy Injection Kaspi et al. 2006 Fireball

  5. Afterglow and EI EI Xu et al. 2008, 2009

  6. Phenomenological model Willingale et al. 2007

  7. LX*∝Ta*-1.06 LT correlation Ta*=Ta/(1+z) Dainotti et al. 2010

  8. LX*∝Ta*-1.06 EI from Magnetar Assumptions： ∝ ~ ~ constant ~ constant Same parameters for new born magnetars---Cosmological standard candles -1 ∝

  9. Energy Injection from Magnetar e+e- EI Fireball Dai 2004

  10. Relativistic wind bubble Dai 2004

  11. Einjection < EFireball Einjection ~ EFireball Yu & Dai, 2007

  12. Dai 2004 EFireball ~ Einjection~ LW T LX* is related to fireball’s energy LX*-T*-Eγ,iso correlation

  13. LTE correlation LX*∝Ta*-0.82Eγ,iso0.78 Xu & Huang 2011

  14. LT vs LTE H=69.7, ΩM=0.291 LT: Log[L/1047erg/s]=0.77[±0.14] -1.16 [±0.16] Log[T/103s] r=-0.73, P=5.6×10-8 σint=0.85±0.097 LTE correlation is much more tight than LT correlation. LTE: Log[L/1047erg/s]=0.73[±0.07] -0.82 [±0.08] Log[T/103s] +0.78[±0.06] Log[Eiso/1053erg] r=0.92, P=1.84×10-20 σint=0.38±0.05

  15. Intermediate class GRBs LT correlation LTE correlation Long IC Dainotti et al. 2010 Xu & Huang 2011

  16. Constrain the Cosmological parameters ΩM=0.42±0.26 Xu & Huang 2011

  17. Summary Afterglow plateau might be resulted from EI from Magnetar LTE-correlation is much more tight than LT-correlation Candidates of Cosmological Standard Candles Thank you!

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