Results 61 to 70 of about 20,710 (214)

Lactea: Web‐Based Spectrum‐Preserving Multi‐Resolution Visualization of the GAIA Star Catalog

Computer Graphics Forum, Volume 44, Issue 3, June 2025.
Abstract The explosion of data in astronomy has resulted in an era of unprecedented opportunities for discovery. The GAIA mission's catalog, containing a large number of light sources (mostly stars) with several parameters such as sky position and proper motion, is playing a significant role in advancing astronomy research and has been crucial in ...
Reem Alghamdi, Markus Hadwiger, Guido Reina, Alberto Jaspe‐Villanueva   +3 more
wiley   +1 more source

Recent progress in theory and observational study of dust grain alignment and rotational disruption in star-forming regions

Frontiers in Astronomy and Space Sciences, 2022
Modern understanding of dust astrophysics reveals that radiative torques (RATs) arising from the radiation–dust interaction can induce two fundamental effects: grain alignment and rotational disruption.
Le Ngoc Tram, Thiem Hoang, Thiem Hoang
doaj   +1 more source

Infrared Emission from Interstellar Dust. IV. The Silicate-Graphite-PAH Model in the Post-Spitzer Era [PDF]

, 2006
IR emission spectra are calculated for dust heated by starlight, for mixtures of amorphous silicate and graphitic grains, including varying amounts of PAH particles. The models are constrained to reproduce the average Milky Way extinction curve.
B. Draine, Aigen Li
semanticscholar   +1 more source

Interstellar dust along the line of sight of GX 3+1 [PDF]

Astronomy & Astrophysics, 2019
Context.Studying absorption and scattering of X-ray radiation by interstellar dust grains allows us to access the physical and chemical properties of cosmic grains even in the densest regions of the Galaxy.Aims.We aim at characterising the dust silicate ...
D. Rogantini, E. Costantini, S. Zeegers, C. Vries, M. Mehdipour, F. D. Groot, H. Mutschke, I. Psaradaki, L.B.F.M. Waters Sron Netherlands Institute for Space Research, The Netherlands., Anton Pannekoek Institute, U. Amsterdam   +11 more
semanticscholar   +1 more source

Emergence of Optical Activity and Surface Morphology Changes in Racemic Amino Acid Films Under Circularly Polarized Lyman‐α Light Irradiation

Chirality, Volume 36, Issue 11, November 2024.
The photoreaction induced by Lyman‐α circularly polarized light (CPL) irradiation in racemic alanine film is more complex than simple preferential photolysis of enantiopure alanine molecules, and formation of larger molecules is observed. Circular networks of order of 100 nm scale are introduced in the alanine film surface by the irradiation.
Masahiro Kobayashi, Jun‐ichi Takahashi, Hiroshi Ota, Koichi Matsuo, Mohamed I. A. Ibrahim, Taketoshi Minato, Gen Fujimori, Masahiro Katoh, Kensei Kobayashi, Yoko Kebukawa, Hiroaki Nakamura   +10 more
wiley   +1 more source

On the Origin of the North Celestial Pole Loop

The Astrophysical Journal, 2023
The North Celestial Pole Loop (NCPL) provides a unique laboratory for studying the early-stage precursors of star formation. Uncovering its origin is key to understanding the dynamical mechanisms that control the evolution of its contents. In this study,
Antoine Marchal, Peter G. Martin
doaj   +1 more source

Analyzing dust particle size and size distribution on extracted particles by SEM and comparing with light scattering techniques

Plasma Processes and Polymers, Volume 21, Issue 8, August 2024.
A comparison is presented between Kinetic Mie Polarimetry and Scanning Electron Microscopy of plasma‐grown amorphous hydrogenated carbon (a‐C:H) particles. The analysis includes particle size distributions, which show that the standard deviation grows linearly, resulting in a constant shape.
Andreas Petersen, Jakob Wötzel, Christiane Zamponi, Julia Kobus, Sebastian Wolf, Franko Greiner   +5 more
wiley   +1 more source

The Flattest Infrared Extinction Curve in Four Isolated Dense Molecular Cloud Cores

The Astrophysical Journal Letters
The extinction curve of interstellar dust in the dense molecular cloud cores is crucial for understanding dust properties, particularly size distribution and composition.
Jun Li, Bingqiu Chen, Biwei Jiang, He Zhao, Botao Jiang, Xi Chen   +5 more
doaj   +1 more source

The Chocolate Chip Cookie Model: Dust-to-metal Ratio of H ii Regions

The Astrophysical Journal Letters, 2023
Using a sample of face-on star-forming galaxies selected from the Sloan Digital Sky Survey, we statistically derive the typical optical depth τ _cl of individual H ii regions based on the “Chocolate Chip Cookie” model of Lu et al. (2022).
Jiafeng Lu, Shiyin Shen, Fang-Ting Yuan, Qi Zeng   +3 more
doaj   +1 more source

The deep eclipses of RW Aur revisited by long‐term photometric and spectroscopic monitoring

Astronomische Nachrichten, Volume 345, Issue 4, May 2024.
Abstract RW Aurigae is a young stellar system containing a classical T Tauri star as the primary component. It shows deep, irregular dimmings, first detected in 2010. At the University Observatory Jena, we carried out optical follow‐up observations. We performed multiband (BVRI) photometry of the system with the Cassegrain‐Teleskop‐Kamera II and the ...
Oliver Lux, Markus Mugrauer, Richard Bischoff   +2 more
wiley   +1 more source