Supernova host galaxies in the dark energy survey: I. Deep coadds, photometry, and stellar masses-猫眼课题宝

DOI：

10.1093/mnras/staa1302

发表时间：

2020-01

期刊：

Monthly Notices of the Royal Astronomical Society

影响因子：

4.8

通讯作者：

中科院分区：

物理与天体物理2区

文献类型：

作者：

P. Wiseman;M. Smith;M. Childress;L. Kelsey;A. Moller;R. Gupta;E. Swann;C. Angus;D. Brout;T. Davis;R. Foley;C. Frohmaier;L. Galbany;C. Guti'errez;R. Kessler;G. Lewis;C. Lidman;E. MacAulay;R. Nichol;M. Pursiainen;M. Sako;D. Scolnic;N. E. Sommer;M. Sullivan;B. Tucker;T. Abbott;M. Aguena;S. Allam;S. Ávila;E. Bertin;D. Brooks;E. Buckley-Geer;D. Burke;A. Rosell;M. Kind;L. Costa;J. Vicente;S. Desai;H. Diehl;P. Doel;T. Eifler;S. Everett;P. Fosalba;J. Frieman;J. Garc'ia-Bellido;E. Gaztañaga;D. Gerdes;R. Gruendl;J. Gschwend;W. Hartley;S. Hinton;D. Hollowood;D. James;K. Kuehn;N. Kuropatkin;M. Lima;M. Maia;M. March;P. Martini;Peter Melchior;F. Menanteau;R. Miquel;R. Ogando;F. Paz-Chinch'on;A. Plazas;A. Romer;A. Roodman;E. Sánchez;V. Scarpine;S. Serrano;E. Suchyta;M. Swanson;G. Tarlé;D. Thomas;D. Tucker;T. Varga;A. Walker;R. Wilkinson

就超新星的数量和数量而言，5年暗能量调查超新星计划(DES-SN)是迄今为止规模最大、最深入的瞬变调查之一。识别和刻画瞬变的宿主星系在它们的分类、形成机制的研究和宇宙学分析中起着关键作用。为了得出准确的宿主星系属性，我们使用基于天空和大气条件选择的单历元DES-SN图像来创建深度优化的COADD。对于五个DES-SN季节中的每一个，从其他四个季节中分离出一个COADD，使得每个SN具有对应的深度COADD，而没有污染SN的排放。CoAdd在g波段达到∼27量级的极限幅度，并且具有比以前的DES-SN主机模板小得多的幅度不确定性，特别是对于微弱对象。我们给出了光谱确认的Ia型(SNE Ia)、核心塌缩(CCSNe)和超光速(SLSNe)以及DES-SN发现的快速演化瞬变(RET)样本的宿主星系的多波段光度测量结果。我们得出了宿主星系的恒星质量，并概率地将恒星质量分布与其他调查的样本进行了比较。我们发现，DES光谱确认的SNE Ia样品在高红移时优先选择较少的大质量主机，而在低红移时分布是一致的。DES CCSNe和SLSNe宿主与其他样本相似，而RET宿主不同于任何其他瞬变宿主，尽管这些差异尚未从选择效应中解脱出来。

The 5-yr Dark Energy Survey Supernova Programme (DES-SN) is one of the largest and deepest transient surveys to date in terms of volume and number of supernovae. Identifying and characterizing the host galaxies of transients plays a key role in their classification, the study of their formation mechanisms, and the cosmological analyses. To derive accurate host galaxy properties, we create depth-optimized coadds using single-epoch DES-SN images that are selected based on sky and atmospheric conditions. For each of the five DES-SN seasons, a separate coadd is made from the other four seasons such that each SN has a corresponding deep coadd with no contaminating SN emission. The coadds reach limiting magnitudes of order ∼27 in g band, and have a much smaller magnitude uncertainty than the previous DES-SN host templates, particularly for faint objects. We present the resulting multiband photometry of host galaxies for samples of spectroscopically confirmed type Ia (SNe Ia), core-collapse (CCSNe), and superluminous (SLSNe) as well as rapidly evolving transients (RETs) discovered by DES-SN. We derive host galaxy stellar masses and probabilistically compare stellar-mass distributions to samples from other surveys. We find that the DES spectroscopically confirmed sample of SNe Ia selects preferentially fewer high-mass hosts at high-redshift compared to other surveys, while at low redshift the distributions are consistent. DES CCSNe and SLSNe hosts are similar to other samples, while RET hosts are unlike the hosts of any other transients, although these differences have not been disentangled from selection effects.

Supernova host galaxies in the dark energy survey: I. Deep coadds, photometry, and stellar masses

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