Results 71 to 80 of about 41,478 (242)

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 incompatibilities between the standard theory of interstellar extinction and observations [PDF]

, 2002
In this paper I review a series of observations which do not agree with the standard interpretation of the extinction curve. The consequence is that light we receive from a reddened star must be contaminated by starlight scattered at very small angular ...
Zagury, Frederic
core   +2 more sources

An All-sky 3D Dust Map Based on Gaia and LAMOST

The Astrophysical Journal Supplement Series
We present a comprehensive 3D dust-reddening map covering the entire Milky Way, constructed by combining reddening estimates based on Large Sky Area Multi-Object Fiber Spectroscopy Telescope (LAMOST) low-resolution spectra ( E ( B  −  V ) _LAMOST ) with ...
Tao Wang, Haibo Yuan, Bingqiu Chen, Maosheng Xiang, Ruoyi Zhang, Bowen Huang, Hongrui Gu, Shuaicong Wang, Jiawei Li   +8 more
doaj   +1 more source

Interstellar extinction toward symbiotic stars

, 2020
Using diffuse interstellar bands (DIBs) at 5780 A, 5797 A and 6613 A, visible in the high resolution spectra, and measuring their equivalent widths, we estimate the interstellar extinction toward seven symbiotic stars. We find $E_{B-V}$= $1.28 \pm 0.10$ for AS 289, $E_{B-V}$= $1.55 \pm 0.10$ for BI Cru, $E_{B-V}$= $0.63 \pm 0.10$ for HD330036, $E_{B-V}$
Zamanov, R. K., Marchev, V. D., Stoyanov, K. A.   +2 more
openaire   +2 more sources

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

Probing the Distinct Extinction Law of the Pillars of Creation in M16 with JWST

The Astrophysical Journal Letters
Investigating the extinction law in regions of high dust extinction, such as the Pillars of Creation within the M16 region, is crucial for understanding the densest parts of the interstellar medium (ISM).
Jun Li, Bingqiu Chen, Biwei Jiang, Jian Gao, Xi Chen   +4 more
doaj   +1 more source

Limitations of the modified blackbody fit method for determining molecular cloud properties

Astronomische Nachrichten, Volume 345, Issue 4, May 2024.
Abstract Achieving a comprehensive understanding of the star and planet formation process is one of the fundamental tasks of astrophysics, requiring detailed knowledge of the physical conditions during the different phases of this process. During the earliest stages, that is, concerning physical processes in molecular clouds and filaments, the column ...
Niko Zielinski, Sebastian Wolf
wiley   +1 more source

The Optical Extinction Law Depends on Magnetic Field Orientation: The RV–ψ Relation

The Astrophysical Journal
For aspherical interstellar dust grains aligned with their short axes preferentially parallel to the local magnetic field, the amount of extinction per grain is larger when the magnetic field is along the line of sight and smaller when in the plane of ...
Brandon S. Hensley
doaj   +1 more source

The extinction and dust-to-gas structure of the planetary nebula NGC 7009 observed with MUSE [PDF]

, 2016
The large field and wavelength range of MUSE is well suited to mapping Galactic planetary nebulae (PN). The bright PN NGC 7009 was observed with MUSE on the VLT during the Science Verification of the instrument in seeing of 0.6".
Barlow, M. J., Monreal-Ibero, A., Ueta, T., Walsh, J. R., Wesson, R., Zijlstra, A. A.   +5 more
core   +3 more sources

Chiroptical properties of membrane glycerophospholipids and their chiral backbones

Chirality, Volume 36, Issue 3, March 2024.
Examination of the interaction of glycerophospholipids with circularly polarized light suggests that direct induction of symmetry breaking to membrane lipids by chiral photons is unlikely. However, anisotropy spectra of certain analogs indicate potential alternative mechanisms for the origins of membrane lipid homochirality, providing insights into the
Jana Bocková, Adrien D. Garcia, Nykola C. Jones, Søren V. Hoffmann, Cornelia Meinert   +4 more
wiley   +1 more source