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arXiv 1202.0741astro-ph.HE
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超新星的逆康普顿X射线辐射:对SN2011fe的应用

Inverse Compton X-ray Emission from Supernovae with Compact Progenitors: Application to SN2011fe

R. Margutti, A. M. Soderberg, L. Chomiuk, R. Chevalier, K. Hurley, D. Milisavljevic, R. J. Foley, J. P. Hughes, P. Slane, C. Fransson, M. Moe, S. Barthelmy, W. … 展开作者

R. Margutti, A. M. Soderberg, L. Chomiuk, R. Chevalier, K. Hurley, D. Milisavljevic, R. J. Foley, J. P. Hughes, P. Slane, C. Fransson, M. Moe, S. Barthelmy, W. Boynton, M. Briggs, V. Connaughton, E. Costa, J. Cummings, E. Del Monte, H. Enos, C. Fellows, M. Feroci, Y. Fukazawa, N. Gehrels, J. Goldsten, D. Golovin, Y. Hanabata, K. Harshman, H. Krimm, M. L. Litvak, K. Makishima, M. Marisaldi, I. G. Mitrofanov, T. Murakami, M. Ohno, D. M. Palmer, A. B. Sanin, R. Starr, D. Svinkin

摘要:

本文提出了贫氢超新星逆康普顿X射线辐射的广义解析形式,并将其应用于SN 2011 fe的Swift-XRT、UVOT和Chandra观测。我们描述了SN 2011 fe在Swift波段的光学性质,发现它们与“正常”SN Ia大致一致,但是,XRT或Chandra都没有检测到X射线源。我们将前体系统的质量损失率限制在低于2 × 10 ^-9 M_sun/yr(3 σ c.l.)风速v_w=100 km/s。我们的结果排除了SN 2011 fe的共生双星祖先,并反对罗氏瓣溢出亚巨星和主序星,如果>1%的转移质量在拉格朗日点丢失。无论密度分布如何,X射线未检测表明祖细胞部位周围(2 × 10^15 <R<5 × 10^16)cm处的环境清洁(颗粒密度< 150 cm-3)。这要么与大部分物质被限制在双星系统内相一致,要么与质量损失和超新星爆炸之间的显着延迟相一致。此外,我们结合了Chomiuk等人2012年的X射线和无线电极限,以约束磁场中的冲击后能量密度。最后,我们使用来自行星际网络的伽马射线观测来搜索冲击爆发脉冲,没有发现与超新星相关的爆发的令人信服的证据。根据原始恒星的紧凑半径,我们估计冲击波爆发脉冲可能无法被当前的卫星探测到。

英文摘要:

We present a generalized analytic formalism for the inverse Compton X-ray emission from hydrogen-poor supernovae and apply this framework to SN2011fe using Swift-XRT, UVOT and Chandra observations. We characterize the optical properties of SN2011fe in the Swift bands and find them to be broadly consistent with a "normal" SN Ia, however, no X-ray source is detected by either XRT or Chandra. We constrain the progenitor system mass loss rate to be lower than 2x10^-9 M_sun/yr (3sigma c.l.) for wind velocity v_w=100 km/s. Our result rules out symbiotic binary progenitors for SN2011fe and argues against Roche-lobe overflowing subgiants and main sequence secondary stars if >1% of the transferred mass is lost at the Lagrangian points. Regardless of the density profile, the X-ray non-detections are suggestive of a clean environment (particle density < 150 cm-3) for (2x10^15<R<5x10^16) cm around the progenitor site. This is either consistent with the bulk of material being confined within the binary system or with a significant delay between mass loss and supernova explosion. We furthermore combine X-ray and radio limits from Chomiuk et al. 2012 to constrain the post shock energy density in magnetic fields. Finally, we searched for the shock breakout pulse using gamma-ray observations from the Interplanetary Network and find no compelling evidence for a supernova-associated burst. Based on the compact radius of the progenitor star we estimate that the shock break out pulse was likely not detectable by current satellites.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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