超新星宿主星系的金属丰度、星族和恒星形成历史

Supernova (SN) explosion is the end of life of some stars, and will release large amount of matter and energy.This process is very important to stellar struncture and evolution, galactic chemical evolution, and cosmological studies. However, it is still not clear about their explosion environments and progeninors, and the relations between the properties of SN and its hosts should be studied further. Up to now, about 5800 SN events have been observed in galaxies, which makes it be important to study the properties of the SN host galaxies. This can help to beter understand the progenitors and environments of SN explosion. We have made cross-matching between the Asiago SN catalog and the SDSS-DR8 main galaxy catalog (north sky), as well with the 6dFGS-DR3 catalog (south sky), and then obtained more than 700 SN host galaxies (SNIa, II, Ib/c) with their optical observations. These data can help to study the metallicities and stellar populations of SN hosts etc. Among this sample, there are about 600 having 2MASS NIR observations, which benefit to estimate their stellar masses properly. Furthermore, the cross-matching with GALEX FUV/NUV and infarred by IRAS and WISE have produced several hundred host galaxies further. Their multi-wavelength spectral energy distribution (SED) from UV to IR allow us to study their ages and star formation history carefully. Moreover, about 2000 SN host galaxies could be observed by using our LAMOST in the future, which can help to study the properties on sites of the SN events in detail.

超新星爆发是恒星演化到最后阶段的爆发性过程，释放出大量物质和能量，对恒星结构和演化、星系化学演化及宇宙学研究都有重要意义。但其爆发环境及前身星特征还不十分清楚，超新星本身的特征与宿主星系的关系也还需进一步研究。目前已观测到5800多个超新星爆发事件，对其宿主星系的研究将非常重要，可以更好地理解其爆发环境及前身星性质。我们将Asiago超新星表与SDSS-DR8主星系表(北天)及6dFGS-DR3(南天)进行交叉，获得了700多个不同类型超新星(SNIa,II,Ib/c)的宿主星系的光学资料，可以研究其金属丰度及星族，其中近600个有2MASS观测，可以较准确地估计其恒星质量。与GALEX紫外及IRAS、WISE红外交叉也获得几百个宿主星系的资料,可以由紫外到红外的多波段SED来研究其星族及恒星形成历史。其中约两千个宿主星系将来可用LAMOST观测到，希望能由此详细研究超新星爆发局地的特征。

超新星爆发是恒星演化到最后阶段的爆发性过程，释放出大量物质和能量，对恒星结构和演化、星系化学演化及宇宙学研究都有重要意义。但其爆发环境及前身星特征还不十分清楚，超新星本身的特征与寄主星系的关系也还需进一步研究。目前已观测到6000多个超新星爆发事件，对其宿主星系特征的研究将非常重要，可以更好地理解其爆发环境及前身星性质。我们将Asiago超新星表与SDSS-DR7主星系表进行交叉，获得了900多个不同类型超新星(SNIa,II,Ib/c)寄主星系的光学资料，可以研究其金属丰度及星族等。与SDSS四期IFU二维光谱观测MaNGA的数据进行交叉后，获得10多个超新星寄主星系的二维光谱资料，可以详细研究其超新星爆发局地的性质，并与星系整体的性质进行比较。通过进一步多波段观测资料交叉，获得了上百个超新星寄主星系的从GALEX紫外到2MASS近红外，再到IRAS红外波段的多波段资料，可以由从紫外到红外的多波段SED来研究其星族及恒星形成历史等。随着MaNGA数据的进一步释放，更多的超新星寄主星系样本被获得二维光谱观测资料，可进一步分析其二维特征。