Results 51 to 60 of about 30,446 (206)

A Reanalysis of the Ultraviolet Extinction from Interstellar Dust in the Large Magellanic Cloud [PDF]

The Astrophysical Journal, 1999
29 pages, 10 figures, to be published in ...
Gordon, Karl, Clayton, Geoffrey, Misselt, K., Gordon, Karl, Clayton, Geoffrey, Misselt, K.   +5 more
openaire   +2 more sources

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

Extinction Distributions in Nearby Star-resolved Galaxies. II. M33

The Astronomical Journal
Extinction maps are essential for tracing interstellar dust and enabling accurate stellar population studies in galaxies. Here, a high-resolution extinction distribution of the nearby Triangulum galaxy (M33), is constructed by fitting multiband color ...
Yuxi Wang, Yi Ren, Jian Gao, Bingqiu Chen, Ying Li   +4 more
doaj   +1 more source

Analytic formulas for frequency and size dependence of absorption and scattering efficiencies of astronomical polycyclic aromatic hydrocarbons

, 2012
In a series of two recent papers, the frequency and size distribution dependence of extinction spectra for astronomical silicate and graphite grains was analyzed by us in the context of MRN type interstellar dust models.
Ashim K. Roy, Cardelli, Cecchi-Pestellini, Donn, Draine, Draine, Draine, Fitzpatrick, Klacka, Li, Li, Li, Mathis, Pendorf, Platt, Pritesh Ranadive, Ranjan Gupta, Roy, Roy, Subodh K. Sharma, Weingartner   +20 more
core   +1 more source

Ultraviolet Extinction by Interstellar Dust in External Galaxies: M31

The Astrophysical Journal, 1996
Hubble Space Telescope (HST) Faint Object Spectrograph (FOS) spectra of stars in OB associations of M31 are used to derive the UV extinction by interstellar dust in M31 by three different methods: (1) comparing spectra of M31 star pairs, (2) comparing spectra of M31 stars to those of Galactic standard stars, and (3) comparing M31 star spectra to ...
Luciana Bianchi, Geoffrey C. Clayton, Ralph C. Bohlin, J. B. Hutchings, Philip Massey   +4 more
openaire   +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

Dust models post-Planck: constraining the far-infrared opacity of dust in the diffuse interstellar medium

, 2015
We compare the performance of several dust models in reproducing the dust spectral energy distribution (SED) per unit extinction in the diffuse interstellar medium (ISM).
Aniano, G., Boulanger, F., Fanciullo, L., Guillet, V., Jones, A. P., Köhler, M., Miville-Deschênes, A., Miville-Deschênes, M.-A., Ysard, N.   +8 more
core   +2 more sources

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

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

The Optical to Infrared 0.6–5.3 μm Dust Extinction Law of the Milky Way with JWST NIRSpec: Westerlund 2

The Astrophysical Journal Letters
The interstellar extinction law is important for interpreting observations and inferring the properties of interstellar dust grains. Based on the 993 prism/CLEAR spectra from the James Webb Space Telescope (JWST), we investigate the 0.6–5.3 μ m ...
Shu Wang, Xiaodian Chen
doaj   +1 more source