论文标题
探索本地体积卫星(精灵)调查:附近矮人卫星系统的几乎量有限的样本
The Exploration of Local VolumE Satellites (ELVES) Survey: A Nearly Volume-Limited Sample of Nearby Dwarf Satellite Systems
论文作者
论文摘要
我们介绍了探索本地体积卫星(精灵)调查的最终结果,该调查是对银河系的矮卫星的调查(MW)样本(MW)样本中的局部体积中的宿主。仅通过削减光度($ M_ {k_s} <-22.1 $ mag)和距离($ d <12 $ mpc)选择主机。我们已经对31个这样的主机中的25个卫星进行了分类,另外五个是从文献中获取的。将所有主机调查至至少150个投影KPC($ \ sim r_ \ m atrm {vir}/2 $),其中大多数调查为300 kpc($ \ sim r_ \ sim r_ \ sim r_ \ mathrm {vir} $)。使用专门用于低表面亮度矮的一致的半自动化算法检测卫星。如注射星系的广泛测试所示,目录完整为$ m_v \ sim-9 $ mag和$μ__{0,v} \ sim26.5 $ mag arcsec $^{ - 2} $。通过距离测量值,包括红移,红色巨型分支的尖端和表面亮度波动,确认候选物为真实的卫星。在所有30名被调查的主机中,有338个确认的卫星,另外105名候选人正在等待距离测量。对于绝大多数,我们提供一致的多波段Sérsic光度法。我们表明,卫星丰度与宿主质量相关,而MW在可比较的系统中非常典型,并且卫星淬灭的分数随卫星质量的减少而陡峭地升高,反映了MW和M31的猝灭分数。精灵调查代表了已知完整性的调查系统统计数据的大量增加,而所提供的目录是探索小规模结构和矮星系进化的各个方面的独特数据集。
We present the final results of the Exploration of Local VolumE Satellites (ELVES) Survey, a survey of the dwarf satellites of a nearly volume-limited sample of Milky Way (MW)-like hosts in the Local Volume. Hosts are selected simply via a cut in luminosity ($M_{K_s}<-22.1$ mag) and distance ($D<12$ Mpc). We have cataloged the satellites of 25 of the 31 such hosts, with another five taken from the literature. All hosts are surveyed out to at least 150 projected kpc ($\sim R_\mathrm{vir}/2$) with the majority surveyed to 300 kpc ($\sim R_\mathrm{vir}$). Satellites are detected using a consistent semi-automated algorithm specialized for low surface brightness dwarfs. As shown through extensive tests with injected galaxies, the catalogs are complete to $M_V\sim-9$ mag and $μ_{0,V}\sim26.5$ mag arcsec$^{-2}$. Candidates are confirmed to be real satellites through distance measurements including redshift, tip of the red giant branch, and surface brightness fluctuations. Across all 30 surveyed hosts, there are 338 confirmed satellites with a further 105 candidates awaiting distance measurement. For the vast majority of these, we provide consistent multi-band Sérsic photometry. We show that satellite abundance correlates with host mass, with the MW being quite typical amongst comparable systems, and that satellite quenched fraction rises steeply with decreasing satellite mass, mirroring the quenched fraction for the MW and M31. The ELVES survey represents a massive increase in the statistics of surveyed systems with known completeness, and the provided catalogs are a unique dataset to explore various aspects of small-scale structure and dwarf galaxy evolution.