Results 41 to 50 of about 891 (131)

SCExAO/CHARIS Near-infrared Scattered-light Imaging and Integral Field Spectropolarimetry of the AB Aurigae Protoplanetary System

The Astrophysical Journal
We analyze near-infrared integral field spectropolarimetry of the AB Aurigae protoplanetary disk and protoplanet (AB Aur b), obtained with SCExAO/CHARIS in 22 wavelength channels covering the J , H , and K passbands ( λ _0 = 1.1–2.4 μ m) over angular ...
Erica Dykes, Thayne Currie, Kellen Lawson, Miles Lucas, Tomoyuki Kudo, Minghan Chen, Olivier Guyon, Tyler D. Groff, Julien Lozi, Jeffrey Chilcote, Timothy D. Brandt, Sebastien Vievard, Nour Skaf, Vincent Deo, Mona El Morsy, Danielle Bovie, Taichi Uyama, Carol Grady, Michael Sitko, Jun Hashimoto, Frantz Martinache, Nemanja Jovanovic, Motohide Tamura, N. Jeremy Kasdin   +23 more
doaj   +1 more source

Spiropyran‐Based Photoisomerizable α‐Amino Acid for Membrane‐Active Peptide Modification

Chemistry – A European Journal, Volume 30, Issue 22, April 16, 2024.
A spiropyran‐derived α‐amino acid was carefully designed for the synthesis of photocontrollable bioactive peptides. Dramatic changes in structure and polarity occurring upon light exposure or dark adaptation of the spiropyran side chain can cause changes in the behavior of peptides in lipid membranes and living cells, as demonstrated on spiropyran ...
Andrii Hrebonkin, Sergii Afonin, Anna Nikitjuka, Oleksandr V. Borysov, Gundars Leitis, Oleg Babii, Serhii Koniev, Theo Lorig, Stephan L. Grage, Peter Nick, Anne S. Ulrich, Aigars Jirgensons, Igor V. Komarov   +12 more
wiley   +1 more source

The CHARA Array Polarization Model and Prospects for Spectropolarimetry

The Astronomical Journal
Polarimetric data provide key insights into infrared emission mechanisms in the inner disks of young stellar objects (YSOs) and the details of dust formation around asymptotic giant branch (AGB) stars. While polarization measurements are well-established
Linling Shuai, John D. Monnier, Benjamin R. Setterholm, Stefan Kraus, Narsireddy Anugu, Tyler Gardner, Jean-Baptiste Le Bouquin, Gail H. Schaefer   +7 more
doaj   +1 more source

Derivation and Application of a Scaling between Hinode/SP and SDO/HMI Vector Magnetic Fields to Improve Magnetic Field Extrapolations

The Astrophysical Journal
Full-disk measurements of the solar magnetic field by the Helioseismic and Magnetic Imager (HMI) are often used for magnetic field extrapolations, but its limited spatial and spectral resolution can lead to significant errors.
C. Beck, A. Prasad, Q. Hu, M. S. Yalim, S. Gosain, D. Prasad Choudhary   +5 more
doaj   +1 more source

Photospheric Pore Rotation Associated with a C-class Flare from Spectropolarimetric Observations with DKIST

The Astrophysical Journal Letters
We present high-resolution observations of a C4.1-class solar flare (SOL2023-05-03T20:53) in AR 13293 from the Visible Spectro-Polarimeter (ViSP) and Visible Broadband Imager (VBI) instruments at the DKIST.
Rahul Yadav, Maria D. Kazachenko, Andrey N. Afanasyev, Gianna Cauzzi, Kevin Reardon   +4 more
doaj   +1 more source

Infrared spectropolarimetry of a C-class solar flare footpoint plasma

Astronomy & Astrophysics
We performed high-spatial-resolution spectropolarimetric observations of the active region NOAA 13363 during a C-class flare with the Gregor Infrared Spectrograph (GRIS) on 16 July 2023.
Vashalomidze Z., Noda C. Quintero, Zaqarashvili T. V., Benko M., Kuridze D., Gömöry P., Rybák J., Lomineishvili S., Collados M., Denker C., Verma M., Kuckein C., Ramos A. Asensio   +12 more
doaj   +1 more source

Spectropolarimetry of Fraunhofer Lines in Local Upper Solar Atmosphere

The Astrophysical Journal
Spectropolarimetric results of Fraunhofer lines between 516.3 and 532.6 nm are presented in local upper solar chromosphere and inner corona below a height of about 0.04 solar radius above the solar limb. The data were acquired on 2013 November 3 during a
Z. Q. Qu, L. Chang, G. T. Dun, X. M. Cheng, C. Fang, Z. Xu, D. Yuan, L. H. Deng, X. Y. Zhang   +8 more
doaj   +1 more source

X-Ray Polarization Study of the Neutron Star Low-mass X-Ray Binary GX 349+2

The Astrophysical Journal
We report the first X-ray polarimetric results of the neutron star (NS) low-mass X-ray binary Z-source GX 349+2 using the Imaging X-ray Polarimetry Explorer (IXPE). We discovered that the X-ray source was polarized at a polarization degree of PD = 1.1% ± 
Unnati Kashyap, Thomas J. Maccarone, Mason Ng, Eliot C. Pattie, Swati Ravi, Herman L. Marshall   +5 more
doaj   +1 more source

Line Polarization of Si ii λ6355 Å in Type Ia Supernovae: A New Statistical Approach to Probe the Explosion Physics and Diversity

The Astrophysical Journal Letters
Spectropolarimetry provides a unique probe of ejecta asphericities, offering direct insights into the underlying explosion physics of Type Ia supernovae (SNe Ia).
Aleksandar Cikota, Peter Hoeflich, Dietrich Baade, Ferdinando Patat, Lifan Wang, J. Craig Wheeler, Yi Yang, Elham Fereidouni, Divya Mishra   +8 more
doaj   +1 more source

Snapshot Mueller spectropolarimeter imager. [PDF]

Microsyst Nanoeng, 2023
Dai T, Phan T, Wang EW, Kwon S, Son J, Lee M, Fan JA.   +6 more
europepmc   +1 more source