B/PS bulges in DESI Legacy edge-on galaxies I: Sample building
Alexander A. Marchuk, Anton A. Smirnov, Natalia Y. Sotnikova, Dmitriy A. Bunakalya, Vladimir P. Reshetnikov, Pavel A. Usachev, Iliya S. Tikhonenko, Viktor D. Zo… 展开作者
Alexander A. Marchuk, Anton A. Smirnov, Natalia Y. Sotnikova, Dmitriy A. Bunakalya, Vladimir P. Reshetnikov, Pavel A. Usachev, Iliya S. Tikhonenko, Viktor D. Zozulia, Daria A. Zakharova
We present the biggest up-to-date sample of edge-on galaxies with B/PS bulges and X-structures. The sample was prepared using images from the DESI Legacy catalogue and contains about 2000 galaxies. To find suitable candidates in catalogue, we made the assumption that the residues (original images minus model) of galaxies with B/PS bulges should exhibit a characteristic X-shape. Galaxies with such features were selected by eye and then used as input data for a neural network training, which was applied to a bigger sample of edge-on galaxies. Using the available data and the photometric models from the literature, we investigated the observational and statistical properties of the sample created. Comparing the $B/D$ ratios for galaxies with and without B/PS bulges, we found that the $B/D$ ratio for galaxies from our sample is statistically higher, with typical values in the range $\approx 0.2-0.5$ depending on the decomposition procedure. We studied how the opening angles $φ$ of the X-structure and the length of its rays are distributed in the formed sample and found them to be consistent with previous measurements and predictions from $N$-body models, e.g. $φ\gtrsim 25~°$, but measured here for a much larger number of galaxies. We found a sharp increase in the B/PS bulge fraction for stellar masses $\log M_{\star} \gtrsim 10.4$, but for edge-on galaxies, which complements the results of previous works. The sample can be used in future work to test various bar models and their relationship with B/PS bulges, as well as to study their stability and evolution.
Bulge plus disc and Sérsic decomposition catalogues for 16,908 galaxies in the SDSS Stripe 82 co-adds: A detailed study of the $ugriz$ structural measurements
The Hubble Space Telescope UV Legacy Survey of Galactic Globular Clusters. XX. Ages of single and multiple stellar populations in seven bulge globular clusters
Morphologies of SAGAbg low-mass galaxies in Legacy Survey multi-band imaging: dependence on stellar masses, star-formation rates and low-redshift evolution
Amherst College（阿默斯特学院）；The Ohio State University（俄亥俄州立大学）；Dartmouth College（达特茅斯学院）；Yale University（耶鲁大学）；Princeton University（普林斯顿大学）；University of Utah（犹他大学）
Exploring the origin of cold gas and star formation in a rare population of strongly bulge-dominated early-type Galaxies
University of Science and Technology of China（中国科学技术大学）；National Astronomical Observatories, Chinese Academy of Sciences（中国科学院国家天文台）；Guizhou University（贵州大学）；Kavli Institute for Astronomy and Astrophysics, Peking University（北京大学科维理天文与天体物理研究所）；Department of Astronomy, School of Physics, Peking University（北京大学物理学院天文学系）
Photometric stellar masses for galaxies in DESI Legacy Imaging Surveys
FZU – Institute of Physics of the Czech Academy of Sciences（捷克科学院物理研究所）；Astronomical Observatory of Belgrade（贝尔格莱德天文台）；Observatoire de Paris, LERMA, Collège de France, CNRS, PSL University, Sorbonne University（巴黎天文台、LERMA、法兰西学院、法国国家科学研究中心、PSL大学、索邦大学）
Finding Strong Gravitational Lenses in the DESI DECam Legacy Survey
我们在9,000度$^2$暗能量相机遗产调查（DECaLS）中执行强引力透镜系统的半自动搜索，这是DESI遗产成像调查（Dey等人）的一部分。这些调查的深度和广度的结合在这个时候是无与伦比的，使它们特别适合于发现新的强引力透镜系统。我们采用深度残差神经网络架构（He et al.）Lanusse等人为了在光度测量中找到强透镜而开发的。我们编译了一个训练集，该训练集由Legacy Surveys和DES中的已知透镜系统以及DECaLS足迹中的非透镜组成。在本文中，我们展示了将我们训练的神经网络应用于以椭圆星系为中心的剪切图像的结果（Lang等人）。在DecaLS。获得最高分数（概率）的图像将进行视觉检查和排名。在这里，我们提出了335个首次确定的候选强透镜系统。
A Value-added Physical Properties Catalog for Low-redshift Galaxies from DESI Legacy Imaging Surveys DR10
National Astronomical Observatories, Chinese Academy of Sciences（中国科学院国家天文台）；University of Chinese Academy of Sciences（中国科学院大学）；National Astronomical Data Center（国家天文科学数据中心）
Galaxy clusters from the DESI Legacy Imaging Surveys -- III. Star-forming fraction of brightest cluster galaxies
National Astronomical Observatories, Chinese Academy of Sciences（中国科学院国家天文台）；School of Astronomy and Space Science, University of Chinese Academy of Sciences（中国科学院大学天文与空间科学学院）
Searching for Galaxy Cluster-Scale Strong lenses from the DESI Legacy Imaging Surveys
Tsinghua University（清华大学）；National Astronomical Observatories, Chinese Academy of Sciences（中国科学院国家天文台）；Department of Astronomy, School of Science, Westlake University（西湖大学理学院天文学系）；Nanchang University（南昌大学）；Center for Relativistic Astrophysics and High Energy Physics, Nanchang University（南昌大学相对论天体物理与高能物理中心）；Purple Mountain Observatory, Chinese Academy of Sciences（中国科学院紫金山天文台）；School of Astronomy and Space Science, University of Chinese Academy of Sciences（中国科学院大学天文与空间科学学院）
Disentangling Stellar Mass and Environmental Effects on eROSITA AGN Activity using multi-wavelength data from GAMA, WISE, GALEX, and DESI Legacy Survey
IIT Hyderabad（印度理工学院海德拉巴分校）；Tata Institute of Fundamental Research（塔塔基础研究所）
Exploring Reionization-Era Quasars III: Discovery of 16 Quasars at $6.4\lesssim z \lesssim 6.9$ with DESI Legacy Imaging Surveys and UKIRT Hemisphere Survey and Quasar Luminosity Function at $z\sim6.7$
这是一个系列中的第三篇论文，旨在通过DESI遗产成像巡天（DELS）和近红外成像巡天（如UKIRT半球巡天（UHS））以及宽场红外巡天探索（$WISE$）中红外巡天的组合来寻找再电离时代的类星体。本文描述了更新的类星体候选者选择程序，报告了在$6.4\lesssim z \lesssim6.9$上从$\sim$ 13，020 deg $^2$区域发现的16个类星体，并给出了$z\sim6.7$上的类星体光度函数（QLF）。测量的QLF在幅度范围$27.6<M_{1450}<-25.5$中跟随$Φ(L_{1450})\propto L_{1450}^{-2.35}$。我们确定了$\langle z \rangle$ =6.7和$M_{1450}<-26.0$处的类星体共动空间密度为$\rm 0.39\pm0.11 Gpc^{-3}$，并发现从$z\sim6$到$z\sim6.7$的指数密度演化参数为$k=-0.78\pm0.18$，对应于向早期每单位红移迅速下降一个$\sim 6$的因子，其速度明显快于$z\sim 3- 5$处。$z\sim6$和$z\sim6.7$之间的宇宙时间只有1.21亿年。类星体密度在如此短的时间内下降了三倍以上，这要求SMBH必须迅速增长，否则它们在更高的红移下辐射效率较低。我们在$z\sim6.7$上测量了类星体的共动发射率，这表明高红移类星体不太可能对…
Cluster properties as a function of dynamical state in the DESI Legacy x UNIONS surveys
University of Waterloo（滑铁卢大学）；Independent University, Bangladesh（孟加拉独立大学）；NASA Goddard Space Flight Center（美国宇航局戈达德太空飞行中心）；Ruhr University Bochum（波鸿鲁尔大学）；Perimeter Institute for Theoretical Physics（基础物理研究所）；University of Hawaii（夏威夷大学）；Carnegie Mellon University（卡内基梅隆大学）；National Research Council Herzberg Astronomy and Astrophysics（国家研究委员会赫茨伯格天文学和天体物理学研究所）；University of British Columbia（不列颠哥伦比亚大学）
Galaxy-SMBH co-evolution in 2,435 DESI disk galaxies and merger-free BH growth in bulgeless disks
University of Oxford（牛津大学）；Lancaster University（兰卡斯特大学）；University of Edinburgh（爱丁堡大学）；Masaryk University（马萨里克大学）；University of Toronto（多伦多大学）；University of Louisville（路易斯维尔大学）；Haverford College（哈弗福德学院）；University of Utah（犹他大学）
Galaxy Clusters from the DESI Legacy Imaging Surveys. IV. Alignment of Member Galaxy Orientations at z < 0.5
Nanjing Normal University（南京师范大学）；National Astronomical Observatories, Chinese Academy of Sciences（中国科学院国家天文台）；Tsung-Dao Lee Institute, Shanghai Jiao Tong University（上海交通大学李政道研究所）；University of Chinese Academy of Sciences（中国科学院大学）
Tracing satellite planes in the Sculptor group: II. Discovery of five faint dwarf galaxies in the DESI Legacy Survey
ARAID Foundation（ARAID基金会）；Ruhr University Bochum（波鸿鲁尔大学）；University of Surrey（萨里大学）；Special Astrophysical Observatory of the Russian Academy of Sciences（俄罗斯科学院特别天体物理观测站）；UAI -- Unione Astrofili Italiani（意大利天文爱好者联合会）；Perimeter Institute for Theoretical Physics（理论物理珀塞尔研究所）
Photometric Redshift PDFs via Neural Network Classification for DESI Legacy Imaging Surveys and Pan-STARRS
Institute for Frontiers in Astronomy and Astrophysics, Beijing Normal University（北京师范大学前沿天文与天体物理研究所）；School of Physics and Astronomy, Beijing Normal University（北京师范大学物理与天文学院）；National Astronomical Observatories, Chinese Academy of Sciences（中国科学院国家天文台）
