乌鲁木齐观测揭示的M82中SN 2008 iz的射电光变曲线
The radio lightcurve of SN 2008iz in M82 revealed by Urumqi observations
摘要：
我们报告一组5 GHz乌鲁木齐观测星系M82，2005年8月至2009年5月。从由此产生的通量密度，我们检测到一个强大的耀斑，在2008年3月或4月开始，并在6月达到峰值。我们将此耀斑与超新星SN 2008iz相鉴别。射电光变曲线的时间取样使我们能够获得有关前兆质量损失率、辐射区磁场强度、爆炸日期和膨胀激波减速的信息。我们还检查了同步加速器自吸收（SSA）的射电光曲线的可能贡献，并比较我们的模型与其他观测的超新星在22 GHz。
英文摘要：
We report on a set of 5 GHz Urumqi observations of the galaxy M82, made between August 2005 and May 2009. From the resulting flux densities, we detect a strong flare, starting in March or April and peaking in June 2008. We identify this flare with supernova SN 2008iz. The time sampling of the radio light curve allows us to obtain information on the precursor mass-loss rate, the strength of the magnetic field in the radiating region, the explosion date, and the deceleration of the expanding shock. We also check the possible contribution of Synchrotron Self Absorption (SSA) to the radio light curve and compare our model with other observations of the supernova at 22 GHz.
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