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The sub-kpc scale gas structure encodes key information of giant molecular cloud (GMC) formation. Therefore, we aim for a quantitative description of molecular gas structure across 150-1000 pc using a sample of 8984 GMCs from 40 galaxies…

Weak lensing of galaxies by large scale structure can potentially measure cosmological quantities as accurately as the cosmic microwave background (CMB). However, the relation between observables and fundamental parameters is more complex…

天体物理学 · 物理学 2009-10-31 Wayne Hu , Max Tegmark

Weak-lensing mass-mapping algorithms, which reconstruct the convergence field from galaxy shear measurements, are crucial for extracting higher-order statistics to constrain cosmological parameters. However, only limited research has…

宇宙学与河外天体物理 · 物理学 2025-05-28 Andreas Tersenov , Lucie Baumont , Jean-Luc Starck , Martin Kilbinger

In many biological systems, the curvature of the surfaces cells live on influence their collective properties. Curvature should likewise influence the behavior of active colloidal particles. We show using molecular simulation of…

软凝聚态物质 · 物理学 2022-02-25 Philipp W. A. Schönhöfer , Sharon C. Glotzer

Upcoming weak lensing surveys will survey large cosmological volumes to measure the growth of cosmological structure with time and thereby constrain dark energy. One major systematic uncertainty in this process is the calibration of the…

宇宙学与河外天体物理 · 物理学 2015-06-23 Arun Kannawadi , Rachel Mandelbaum , Claire Lackner

Gravitational lensing is a powerful tool for studying the distribution of mass in the Universe. Understanding the magnification bias effect in gravitational lensing and its impact on the flux of sub-millimetre galaxies (SMGs) is crucial for…

星系天体物理 · 物理学 2024-03-05 D. Crespo , J. González-Nuevo , L. Bonavera , M. M. Cueli , J. M. Casas

New micro-satellite constellations enable unprecedented systematic monitoring applications thanks to their wide coverage and short revisit capabilities. However, the large volumes of images that they produce have uneven qualities, creating…

计算机视觉与模式识别 · 计算机科学 2019-04-22 Jérémy Anger , Carlo de Franchis , Gabriele Facciolo

It has been long recognised that, besides being a formidable experiment to observe the primordial CMB anisotropies, Planck will also have the capability to detect galaxy clusters via their SZ imprint. In this paper constraints on…

天体物理学 · 物理学 2009-11-11 Joern Geisbuesch , Michael Hobson

We introduce an unsupervised clustering algorithm to improve training efficiency and accuracy in predicting energies using molecular-orbital-based machine learning (MOB-ML). This work determines clusters via the Gaussian mixture model (GMM)…

化学物理 · 物理学 2023-03-28 Lixue Cheng , Jiace Sun , Thomas F. Miller

The main goal of this work, the second in a three-paper series, is to test the impact of a methodological improvement in measuring the magnification bias signal on a sample of submillimeter galaxies and its implications for constraining…

宇宙学与河外天体物理 · 物理学 2024-05-09 Marcos M. Cueli , Joaquín González-Nuevo , Laura Bonavera , Andrea Lapi , David Crespo , José Manuel Casas

We present distances to 76 medium-sized molecular clouds and an extra large-scale one in the second Galactic quadrant ($104.75^\circ <l<150.25^\circ $ and $|b|<5.25^\circ$), 73 of which are accurately measured for the first time. Molecular…

星系天体物理 · 物理学 2021-02-03 Qing-Zeng Yan , Ji Yang , Yan Sun , Yang Su , Ye Xu , Hongchi Wang , Xin Zhou , Chen Wang

It is important to understand the origin of molecular line intensities and chemical composition in the molecular-cloud scale in the Galactic sources because it serves as a benchmark to compare with the chemical compositions of extragalactic…

Structures in molecular ISM are observed to follow a power-law relation between the velocity dispersion and spatial size, known as Larson's first relation, which is often attributed to the turbulent nature of molecular ISM and imprints the…

Galaxy clusters are an essential tool to understand and constrain the cosmological parameters of our Universe. Thanks to its multi-band design, J-PAS offers a unique group and cluster detection window using precise photometric redshifts and…

Upcoming deep optical surveys, such as the Vera C. Rubin Observatory Legacy Survey of Space and Time (LSST), will scan the sky to unprecedented depths, detecting billions of galaxies. However, this amount of detections will lead to the…

宇宙学与河外天体物理 · 物理学 2024-12-04 Manon Ramel , Cyrille Doux , Marine Kuna

We describe the construction of catalogues of galaxy clusters from the APM Galaxy survey using an automated algorithm based on Abell-like selection criteria. We investigate the effects of varying several parameters in our selection…

天体物理学 · 物理学 2015-06-24 Gavin Dalton , Steve Maddox , Will Sutherland , George Efstathiou

NGC~613 is a nearby barred spiral galaxy with a nuclear ring. Exploiting high spatial resolution ($\approx20$ pc) Atacama Large Millimeter/sub-millimeter Array $^{12}$CO(1-0) observations, we study the giant molecular clouds (GMCs) in the…

The Northern Sky Optical Cluster Survey is a project to create an objective catalog of galaxy clusters over the entire high-galactic-latitude Northern sky, with well understood selection criteria. We use the object catalogs generated from…

天体物理学 · 物理学 2016-08-30 R. R. Gal , R. R. DeCarvalho , S. C. Odewahn , S. G. Djorgovski , V. E. Margoniner

We introduce a new method to determine galaxy cluster membership based solely on photometric properties. We adopt a machine learning approach to recover a cluster membership probability from galaxy photometric parameters and finally derive…

宇宙学与河外天体物理 · 物理学 2020-02-26 P. A. A. Lopes , A. L. B. Ribeiro

Polarimeric maps have been used on the characterization of the magnetic field in molecular clouds. However, it is difficult to determine the 3-dimensional properties of these regions from the projected maps. In that case, numerical…

天体物理学 · 物理学 2008-12-23 D. Falceta-Goncalves , A. Lazarian , G. Kowal