Results 51 to 60 of about 247 (167)

Sensitivity of Polarization to Grain Shape. II. Aggregates

The Astrophysical Journal
A previous study (Paper I) investigated the polarization properties of a variety of simple convex grain shapes, some of which were found to be consistent with the observed polarization properties of interstellar dust from far-ultraviolet to far-infrared.
B. T. Draine
doaj   +1 more source

MoonShine: A software‐hardware system for simulating moonlight ground illuminance and re‐creating artificial moonlight cycles in a laboratory environment

Methods in Ecology and Evolution, Volume 15, Issue 4, Page 701-715, April 2024.
Abstract Moonlight exerts profound ecological, behavioural and physiological effects on animals. However, lunar cycles are characterised by complex changes in the illuminance and timing of illumination, making it challenging to re‐create and manipulate moonlight cycles in the laboratory using artificial lights.
Lok Poon, Ian T. Jenks, W. G. R. Crampton   +2 more
wiley   +1 more source

Magnetic Field of a Ring-like Molecular Cloud

The Astronomical Journal
We present a detailed study of the magnetic field structure in the G111 molecular cloud, a ring-like filamentary cloud within the NGC 7538 region. Our analysis combines multiwavelength polarization data and molecular-line observations to investigate the ...
Dana Alina, Adel Umirbayeva, Yasuo Doi, Soichiro Jo, Yue Hu, Alex Lazarian, Janik Karoly, Tie Liu, Koji S. Kawabata, Alua Mukhash, Danial Zhumagayir, Tomori Hori, Tetsuharu Maruta, Ryo Imazawa, Tatsuya Nakaoka, Mahito Sasada   +15 more
doaj   +1 more source

Rotation of Polarization Angle in Gamma-Ray Burst Prompt Phase. III. The Influence of the Magnetic Field Orientation

The Astrophysical Journal
Polarization is very sensitive to the configuration of the magnetic field in the radiation region. In addition to polarization curve and polarization spectrum, studies of the polarization angle (PA) rotation spectrum are also crucial.
Xing-Yao Wang, Jia-Sheng Li, Mi-Xiang Lan   +2 more
doaj   +1 more source

TRIShUL: Technique for Reconstructing magnetic Interstellar Structure Using starLight polarization

Astronomy & Astrophysics
We present a novel technique for the decomposition of line-of-sight (LOS) stellar polarization as a function of distance, aimed at reconstructing 3D plane-of-sky magnetic structures in the interstellar medium.
Uppal Namita, Tassis Konstantinos, Pavlidou Vasiliki, Pelgrims Vincent, Falalaki Myrto   +4 more
doaj   +1 more source

Effect of Multiple Scattering on the Transmission Spectra and the Polarization Phase Curves for Earth-like Exoplanets

The Astrophysical Journal, 2023
It is the most appropriate time to characterize the Earth-like exoplanets in order to detect biosignature beyond the Earth because such exoplanets will be the prime targets of big-budget missions like JWST, Roman Space Telescope, HabEx, LUVOIR, Thirty ...
Manika Singla, Aritra Chakrabarty, Sujan Sengupta   +2 more
doaj   +1 more source

The Detection Prospects of the Polarizations in the Plateau Phase of the Gamma-Ray Burst Afterglow by eXTP

The Astrophysical Journal
Approximately 20%–50% of the gamma-ray burst (GRB) X-ray afterglows exhibit shallow decay features. Two popular energy-injection models have been proposed to interpret such observational phenomena, the relativistic wind bubble (RWB) model with a Poynting-
Shu-Ting Wu, Mi-Xiang Lan, Zelin Ren, Ming-Yu Ge, Xue-Feng Wu, Zi-Gao Dai   +5 more
doaj   +1 more source

Polarization of Circumstellar Debris Disk Light Echoes

The Astronomical Journal
Light echoes of debris disks around active stars can reveal disk structure and composition even when disks are not spatially resolved. Unfortunately, distinguishing reflected light from quiescent starlight and unexpected post-peak flare structure is ...
Austin J. King, Benjamin C. Bromley, Preston W. Harris, Scott J. Kenyon   +3 more
doaj   +1 more source

Spectropolarimetry for Discerning Geometry and Structure in Circumstellar Media of Hot Massive Stars

Galaxies
Spectropolarimetric techniques are a mainstay of astrophysical inquiry, ranging from Solar System objects to the Cosmic Background Radiation. This review highlights applications of stellar polarimetry for massive hot stars, particularly in the context of
Richard Ignace, Kenneth G. Gayley, Roberto Casini, Paul Scowen, Christiana Erba, Jeremy Drake   +5 more
doaj   +1 more source

Sensitivity of Polarization to Grain Shape. I. Convex Shapes

The Astrophysical Journal
Aligned interstellar grains produce polarized extinction (observed at wavelengths from the far-ultraviolet to the mid-infrared) and polarized thermal emission (observed at far-infrared and submm wavelengths).
B. T. Draine
doaj   +1 more source