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The existence of high galactic latitude molecular clouds has been known for several decades, and studies of their dust and gas distributions reveal complicated morphological structures. Their dynamics involve turbulence even in the absence…

星系天体物理 · 物理学 2025-08-20 Marco Monaci , Loris Magnani , Steven N. Shore

We leverage the 1 pc spatial resolution of the Leike et al. 2020 3D dust map to characterize the three-dimensional structure of nearby molecular clouds ($d \lesssim 400$ pc). We start by "skeletonizing" the clouds in 3D volume density space…

We apply two machine learning methods, a CNN deep-leaning model and a gradient-boosting decision tree, to estimate individual cluster optical depths from observed properties derived from multiple complementary datasets. The models are…

宇宙学与河外天体物理 · 物理学 2025-07-28 Yulin Gong , Rachel Bean

We present a new algorithm to detect inter-cluster galaxy filaments based upon the assumption that the orientations of constituent galaxies along such filaments are non-isotropic. We apply the algorithm to the 2dF Galaxy Redshift Survey…

天体物理学 · 物理学 2009-11-10 Kevin A. Pimbblet

We combine the GALFORM semi-analytical model of galaxy formation, which predicts the star formation and merger histories of galaxies, the GRASIL spectro-photometric code, which calculates the spectral energy distributions (SEDs) of galaxies…

宇宙学与河外天体物理 · 物理学 2015-05-20 C. Almeida , C. M. Baugh , C. G. Lacey

Context: Aligned dust grains are commonly exploited to probe the magnetic field orientation. However, the exact physical processes that result in a coherent large-scale grain alignment are far from being constrained. Aims: In this work, we…

星系天体物理 · 物理学 2023-07-05 Stefan Reissl , Paul Meehan , Ralf S. Klessen

Filaments are ubiquitous in the universe. Recent observations have revealed that stars and star clusters form preferentially along dense filaments. Understanding the formation and properties of filaments is therefore a crucial step in…

太阳与恒星天体物理 · 物理学 2016-01-22 Christoph Federrath

Millimeter wave (mmWave) radars have attracted significant attention from both academia and industry due to their capability to operate in extreme weather conditions. However, they face challenges in terms of sparsity and noise…

计算机视觉与模式识别 · 计算机科学 2024-03-20 Ruibin Zhang , Donglai Xue , Yuhan Wang , Ruixu Geng , Fei Gao

The Planck survey has quantified polarized Galactic foregrounds and established that they are a main limiting factor in the quest for the cosmic microwave background (CMB) B-mode signal induced by primordial gravitational waves during…

Accurate local fiber orientation distribution (FOD) modeling based on diffusion magnetic resonance imaging (dMRI) capable of resolving complex fiber configurations benefits from specific acquisition protocols that sample a high number of…

图像与视频处理 · 电气工程与系统科学 2020-12-18 Oeslle Lucena , Sjoerd B. Vos , Vejay Vakharia , John Duncan , Keyoumars Ashkan , Rachel Sparks , Sebastien Ourselin

Filamentary structures are ubiquitous in observations of real molecular clouds, and also in simulations of turbulent, self-gravitating gas. However, making comparisons between observations and simulations is complicated by the difficulty of…

星系天体物理 · 物理学 2020-10-14 F. D. Priestley , A. P. Whitworth

We present synthetic dust polarisation maps of 3D magneto-hydrodynamical simulations of molecular clouds before the onset of stellar feedback. The clouds are modelled within the SILCC-Zoom project and are embedded in their galactic…

星系天体物理 · 物理学 2018-10-31 D. Seifried , S. Walch , S. Reissl , J. C. Ibáñez-Mejía

Aims: We examine the recoverability and completeness limits of the dense core mass functions (CMFs) derived for a molecular cloud using extinction data and a core identification scheme based on two-dimensional thresholding. Methods: We…

星系天体物理 · 物理学 2009-11-13 J. Kainulainen , C. J. Lada , J. M. Rathborne , J. F. Alves

Polarization carries information about the magnetic fields in interstellar clouds. The observations of polarized dust emission are used to study the role of magnetic fields in the evolution of molecular clouds and the initial phases of…

星系天体物理 · 物理学 2015-05-13 V. -M. Pelkonen , M. Juvela , P. Padoan

3D object detection is a core component of automated driving systems. State-of-the-art methods fuse RGB imagery and LiDAR point cloud data frame-by-frame for 3D bounding box regression. However, frame-by-frame 3D object detection suffers…

计算机视觉与模式识别 · 计算机科学 2021-05-24 Emeç Erçelik , Ekim Yurtsever , Alois Knoll

Based on recent advancements in using machine learning for classical density functional theory for systems with one-dimensional, planar inhomogeneities, we propose a machine learning model for application in two dimensions (2D) akin to…

统计力学 · 物理学 2025-05-22 Felix Glitsch , Jens Weimar , Martin Oettel

Cloud detection is essential for atmospheric retrievals, climate studies, and weather forecasting. We analyze infrared radiances from the Infrared Atmospheric Sounding Interferometer (IASI) onboard Meteorological Operational (MetOp)…

大气与海洋物理 · 物理学 2025-08-15 Chiara Zugarini , Cristina Sgattoni , Luca Sgheri

Dust modeling is crucial to infer dust properties and budget for galaxy studies. However, there are systematic disparities between dust grain models that result in corresponding systematic differences in the inferred dust properties of…

Context. Molecular Clouds (MCs) are the place where stars are formed and their feedback starts to take place, regulating the evolution of galaxies. Therefore, MCs represent the critical scale at which to study how ultra-violet (UV) photons…

星系天体物理 · 物理学 2025-03-12 Fabio Di Mascia , Andrea Pallottini , Laura Sommovigo , Davide Decataldo

Filaments play a crucial role in providing the necessary environmental conditions for star formation, actively participating in the process. To facilitate the identification and analysis of filaments, we introduce DPConCFil (Directional and…

星系天体物理 · 物理学 2025-01-10 Yu Jiang