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arXiv 1311.2525astro-ph.SR
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SN 2009 N:连接正常和次发光型II-P SNe

SN 2009N: Linking normal and subluminous type II-P SNe

K. Takáts, M. L. Pumo, N. Elias-Rosa, A. Pastorello, G. Pignata, E. Paillas, L. Zampieri, J. P. Anderson, J. Vinkó, S. Benetti, M-T. Botticella, F. Bufano, A. C… 展开作者

K. Takáts, M. L. Pumo, N. Elias-Rosa, A. Pastorello, G. Pignata, E. Paillas, L. Zampieri, J. P. Anderson, J. Vinkó, S. Benetti, M-T. Botticella, F. Bufano, A. Campillay, R. Cartier, M. Ergon, G. Folatelli, R. J. Foley, F. Förster, M. Hamuy, V-P. Hentunen, E. Kankare, G. Leloudas, N. Morrell, M. Nissinen, M. M. Phillips, S. J. Smartt, M. Stritzinger, S. Taubenberger, S. Valenti, S. D. Van Dyk, J. B. Haislip, A. P. LaCluyze, J. P. Moore, D. Reichart

摘要:

本文介绍了NGC 4487中SN 2009 N的紫外、光学、近红外光度学和光谱学。该天体是一颗II-P型超新星,光谱类似于亚发光的II-P型超新星,但其热光度类似于中等光度的SN 2008in。我们创建SYNOW模型的平台相谱线识别和测量的膨胀速度。在近红外光谱中,我们发现迹象表明,超新星喷出物和预先存在的拱星物质之间可能存在弱相互作用。这些迹象也出现在SN 2008的近红外光谱中。用膨胀光球法和标准烛光法测定了SN 2009 N的距离为$D= 21.6 \pm 1.1\,{\mathrm {Mpc}}$。生成的镍块估计为$\sim 0.020 \pm 0.004\,{\mathrm M_\odot}$。我们推断的物理性质的祖在爆炸通过流体动力学模型的观测。我们发现总能量值为$\sim 0.48 \times 10^{51}\, {\mathrm {erg}}$,喷射质量为$\sim 11.5\,{\mathrm M_\odot}$,初始半径为$\sim 287\,{\mathrm R_\odot}$。

英文摘要:

We present ultraviolet, optical, near-infrared photometry and spectroscopy of SN 2009N in NGC 4487. This object is a type II-P supernova with spectra resembling those of subluminous II-P supernovae, while its bolometric luminosity is similar to that of the intermediate luminosity SN 2008in. We created SYNOW models of the plateau phase spectra for line identification and to measure the expansion velocity. In the near-infrared spectra we find signs indicating possible weak interaction between the supernova ejecta and the pre-existing circumstellar material. These signs are also present in the previously unpublished near-infrared spectra of SN 2008in. The distance to SN 2009N is determined via the expanding photosphere method and the standard candle method as $D= 21.6 \pm 1.1\,{\mathrm {Mpc}}$. The produced nickel-mass is estimated to be $\sim 0.020 \pm 0.004\,{\mathrm M_\odot}$. We infer the physical properties of the progenitor at the explosion through hydrodynamical modelling of the observables. We find the values of the total energy as $\sim 0.48 \times 10^{51}\, {\mathrm {erg}}$, the ejected mass as $\sim 11.5\,{\mathrm M_\odot}$, and the initial radius as $\sim 287\,{\mathrm R_\odot}$.

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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