AI 中文总结
对Ic型超新星SN 2020akf和SN 2021mxx进行光学测光和中分辨率光谱综合分析，涵盖其在B波段最大值前后的演化，给出光度、速度、动能等参数，分析表明SN 2020akf是过渡型，SN 2021mxx是正常型。
AI 中文摘要
我们对Ic型超新星（SNe）SN 2020akf和SN 2021mxx进行了光学测光和中分辨率光谱的综合分析。我们的研究涵盖了SN 2020akf从相对于其B波段最大值的-5天到109天以及SN 2021mxx从-3天到115天的演化。它们的峰值准热光度分别估计为logL_bol = 42.37±0.02和42.21±
英文摘要
We present a comprehensive analysis of optical photometry and medium-resolution spectroscopy for Type Ic supernovae (SNe) SN 2020akf and SN 2021mxx. Our study covers the evolution of SN 2020akf from -5 to 109 days and SN 2021mxx from -3 to 115 days relative to their B-band maximum. Their peak quasi-bolometric luminosities are estimated at logL_bol = 42.37 +- 0.02 and 42.21 +- 0.02 erg/s, respectively. The velocities of the ejecta, derived from the Fe II 5169 A line at maximum light, are approximately 15000 km/s for SN~2020akf and about 10000 km/s for SN~2021mxx, which are consistent with those observed in other Type~Ic SNe. Using the semianalytical Arnett model, we estimate that SN 2020akf has a kinetic energy of E_k = 6.33 (+0.68)(-0.62) x 10^51 erg and an ejected mass of M_ej = 4.71 (+0.50)(-0.46) M_sun, while for SN 2021mxx, we get E_k = 0.54 (+0.08)(-0.12) x 10^51 erg and M_ej = 0.90 (+0.14)(-0.18),M_sun. The mass of Ni56 synthesized in the explosion is estimated at 0.10 +- 0.02 M_sun for SN 2020akf and 0.05 +- 0.01 M_sun for SN 2021mxx. The metallicities of the host galaxies near the SN regions are ~0.81 Z_sun for SN 2020akf and ~0.76 Z_sun for SN 2021mxx, where Z_sun indicates solar metallicity. Our detailed analysis suggests that SN 2020akf falls into the category of a transitional Type Ic SN, having spectral properties between normal and broad-line Type Ic SNe, while SN 2021mxx is a normal Type Ic SN with an extremely low value of the M_ej / E_k ratio.
CommentsAccepted for publication in ApJ. 28 Pages, 21 Figures, 7 Tables
