Results 41 to 50 of about 247 (167)

A Decade of Linear and Circular Polarimetry with the POLISH2 Polarimeter

The Astrophysical Journal Supplement Series, 2023
The POLISH2 optical polarimeter has been in operation at the Lick Observatory 3 m Shane telescope since 2011, and it was commissioned at the Gemini North 8 m in 2016.
Sloane J. Wiktorowicz, Agnieszka Słowikowska, Larissa A. Nofi, Nicole Rider, Angie Wolfgang, Ninos Hermis, Daniel Jontof-Hutter, Amanda J. Bayless, Gary M. Cole, Kirk B. Crawford, Valeri V. Tsarev, Michael C. Owens, Ernest G. Jaramillo, Geoffrey A. Maul, James R. Graham, Maxwell A. Millar-Blanchaer, Kimberly Bott, Jon C. Mauerhan   +17 more
doaj   +1 more source

At the edge of darkness: A framework for the evolution of visual systems in dim light

Functional Ecology, Volume 39, Issue 10, Page 2626-2636, October 2025.
Read the free Plain Language Summary for this article on the Journal blog. Abstract Light is an important biological cue for all living things. For animals, where many behaviours are driven by sensory input from the eyes, light is also a critical environmental feature shaping animal eye evolution, with the intensity of light (i.e.
Megan L. Porter
wiley   +1 more source

Spinning Dust Emission from Wobbling Grains: Important Physical Effects and Implications

Advances in Astronomy, Volume 2012, Issue 1, 2012., 2012
We review the major progress on the modeling of electric dipole emission from rapidly spinning tiny dust grains, including polycyclic aromatic hydrocarbons (PAHs). We begin by summarizing the original model of spinning dust proposed by Draine and Lazarian and recent theoretical results improving the Draine and Lazarian model.
Thiem Hoang, A. Lazarian, Laurent Verstraete   +2 more
wiley   +1 more source

Three-dimensional B-fields in the Interstellar Medium and Star-forming Regions (3D-BLISS). I. Using Starlight Polarization in the Massive IRDC Filament G11.11-0.12

The Astrophysical Journal
Measuring three-dimensional magnetic fields (3D B -fields) is essential to understanding the formation and evolution of the interstellar medium and multiscale star formation; however, the accurate measurement of 3D B -fields is still challenging.
Bao Truong, Thiem Hoang, Nguyen Bich Ngoc, Nguyen Chau Giang, Le Ngoc Tram, Ngân Lê   +5 more
doaj   +1 more source

Interstellar Polarization of Starlight and the Turbulent Structure of the Galaxy

The Astrophysical Journal, 1969
Polarization fluctuations of starlight indicating turbulent structure of interstellar medium, noting pulsar signal dispersion and Faraday ...
J. R. Jokipii, I. Lerche, R. A. Schommer
openaire   +1 more source

Notional Geological Traverses, Station Activities, and Sample Collection on Mons Malapert, Lunar South Polar Region

Journal of Geophysical Research: Planets, Volume 130, Issue 7, July 2025.
Abstract The geology of a potential Artemis landing site on Mons Malapert is examined using remote sensing techniques and lessons learned from Apollo missions to the lunar surface. Orthomosaics, digital terrain models, illumination models, thermal conditions, crater size‐frequency distribution analyses, geomorphological mapping, spectral and ...
David A. Kring, Amy L. Fagan, Valentin T. Bickel, Ariel N. Deutsch, Lisa R. Gaddis, Juliane Gross, Harald Hiesinger, Therese M. Huning, José M. Hurtado Jr., Wajiha Iqbal, Katherine H. Joy, Laszlo Keszthelyi, Myriam Lemelin, Chris A. Looper, José M. Martínez‐Camacho, Gordon R. Osinski, Eloy Peña‐Asensio, Nico Schmedemann, Matthew A. Siegler, Sonia M. Tikoo, Carolyn H. van der Bogert, Kris Zacny   +21 more
wiley   +1 more source

Foreground Dust Properties toward the Cluster NGC 7380

The Astronomical Journal
Using starlight polarization, we present the properties of foreground dust toward cluster NGC 7380 embedded in H ii region Sh 2-142. Observations of starlight polarization are carried out in four filters using an imaging polarimeter equipped with a 104 ...
Sadhana Singh, Jeewan C. Pandey, Thiem Hoang, Neelam Panwar, Biman J. Medhi, Vishal Joshi, Shashikiran Ganesh   +6 more
doaj   +1 more source

Iron Deficiency Impairs Dendritic Cell Development and Function, Compromising Host Anti‐Infection Capacity

Advanced Science, Volume 12, Issue 20, May 29, 2025.
Iron deficiency reduces monocyte dendritic cell progenitor (MDP) numbers by inhibiting migration and proliferation while promoting apoptosis, subsequently reducing downstream common dendritic cell precursors (CDP) and dendritic cell (DC). Impaired DCs enter the lungs via blood circulation, where reduced antigen presentation impairs T‐cell activation ...
Quanzhong Ren, Xiaotong Xu, Zheng Dong, Jiahuang Qiu, Qing'e Shan, Rui Chen, Yajun Liu, Juan Ma, Sijin Liu   +8 more
wiley   +1 more source

Fluctuation theory of starlight polarization

The Astrophysical Journal, 1980
The average and the variance of absolute polarization of starlight are calculated as a function of distance based on the fluctuation theory of Langevin's scheme. The computed curves from the theory agree with the sample observational data. It estimates a correlation length of 225 pc and a fluctuating angle of 22./sup 0/5 for the fluctuation of ...
openaire   +1 more source

Automatic Detection and Feature Extraction of Equatorial Plasma Bubbles From All‐Sky Airglow Image Based on Machine Learning

Space Weather, Volume 23, Issue 5, May 2025.
Abstract We developed a deep convolutional neural network‐based program code that automatically detects equatorial plasma bubbles (EPBs), segments EPB morphologies, and then extracts their features (including EPBs' northernmost foot latitudes and zonal drift velocities) from OI 630 nm airglow images.
Jia Zhong, Ziming Zou, Kun Wu, Jiyao Xu, Yang Lu, Longchang Sun, Qinzeng Li, Wei Yuan   +7 more
wiley   +1 more source