Results 51 to 60 of about 86,451 (281)

Improved Measurements of the IXPE Crab Polarization

The Astrophysical Journal, 2023
X-ray polarization from the Imaging X-ray Polarimetry Explorer (IXPE) provides an important new probe of the geometry of the pulsar emission zone and of particle acceleration in the surrounding pulsar wind nebula.
Josephine Wong, Roger W. Romani, Jack T. Dinsmore   +2 more
doaj   +1 more source

Spitzer Space Telescope Infrared Imaging and Spectroscopy of the Crab Nebula [PDF]

, 2006
We present 3.6, 4.5, 5.8, 8.0, 24, and 70 micron images of the Crab Nebula obtained with the Spitzer Space Telescope IRAC and MIPS cameras, Low- and High-resolution Spitzer IRS spectra of selected positions within the nebula, and a near-infrared ground ...
Bandiera R., Charles E. Woodward, Clayton D. D., Elisha F. Polomski, Gehrz R. D., Jaffe W. J., Kardashev N. S., Kris Davidson, Lawrence Rudnick, Lunming Yuen, Nathan Smith, Oliva E., Robert D. Gehrz, Swinbank E., Takashi Onaka, Tea Temim, Thomas L. Roellig, Veron-Cetty M. P.   +17 more
core   +4 more sources

Expert‐led priorities for a response diversity research agenda in ecology

Oikos, EarlyView.
Response diversity describes variation in ecological responses to environmental change. Response diversity is expected to drive ecological stability since a wider variety of responses to one or more environmental factors should stabilise fluctuations of ecosystem functions. However, uptake of empirical response diversity research has been slow. Here we
Samuel R. P.‐J. Ross, Ceres Barros, Laura E. Dee, Mike S. Fowler, Owen L. Petchey, Takehiro Sasaki, Hannah J. White, Anna LoPresti   +7 more
wiley   +1 more source

VLT observations of the asymmetric Etched Hourglass Nebula, MyCn 18 [PDF]

, 2014
Context. The mechanisms that form extreme bipolar planetary nebulae remain unclear. Aims. The physical properties, structure, and dynamics of the bipolar planetary nebula, MyCn 18, are investigated in detail with the aim of understanding the shaping ...
Clyne, N., Lloyd, M., Matsuura, M., Meaburn, J., Redman, M. P., Singh, N.   +5 more
core   +2 more sources

Correlation‐Driven d‐Band Modifications Promote Chemical Bonding at 3d‐Ferromagnetic Surfaces

Small, EarlyView.
Electron correlation at the oxygen‐passivated Fe(100) surface renormalizes and narrows the Fe d‐bands, enhancing their energetic overlap with the frontier orbitals of adsorbed pentacene. This strengthens hybridization and converts a weakly bound interface into a chemisorbed hybrid system, illustrating how correlation‐tuned d‐bands can be used to ...
David Maximilian Janas, Andreas Windischbacher, Alessandro Sala, Vitaliy Feyer, Iulia Cojocariu, Manuel Gruber, Mehdi Bouatou, Andrea Droghetti, Peter Puschnig, Giovanni Zamborlini, Mirko Cinchetti   +10 more
wiley   +1 more source

Modeling the X-Ray Emission of the Boomerang Nebula and Implication for Its Potential Ultrahigh-energy Gamma-Ray Emission

The Astrophysical Journal
The Boomerang Nebula is a bright radio and X-ray pulsar wind nebula (PWN) powered by an energetic pulsar, PSR J2229+6114. It is spatially coincident with one of the brightest ultrahigh-energy (UHE; ≥100 TeV) gamma-ray sources, LHAASO J2226+6057.
Xiao-Bin Chen, Xuan-Han Liang, Ruo-Yu Liu, Xiang-Yu Wang   +3 more
doaj   +1 more source

Panchromatic HST/WFC3 Imaging Studies of Young, Rapidly Evolving Planetary Nebulae. II. NGC 7027

The Astrophysical Journal, 2022
The iconic planetary nebula (PN) NGC 7027 is bright, nearby ( D ∼ 1 kpc), highly ionized, intricately structured, and well observed. This nebula is hence an ideal case study for understanding PN shaping and evolution processes.
Paula Moraga Baez, Joel H. Kastner, Bruce Balick, Rodolfo Montez Jr., Jesse Bublitz   +4 more
doaj   +1 more source

A self-consistent stellar and 3D nebular model for Planetary Nebula IC418

, 2009
We present a coherent stellar and nebular model reproducing the observations of the Planetary Nebula IC418. We want to test whether a stellar model obtained by fitting the stellar observations is able to satisfactory ionize the nebula and reproduce the ...
Aller, Aller, Beck, Bloecker, Buerger, C. Morisset, Cristallo, Ercolano, Escalante, Ferland, Fitzpatrick, García-Segura, Gesicki, Gesicki, Gutíerrez-Moreno, Guzmán, Handler, Henry, Hillier, Hillier, Hyung, Karakas, Keenan, Krueger, L. Georgiev, Macfarlane, Marigo, Mendez, Mendez, Monteiro, Patriarchi, Pauldrach, Pottasch, Prinja, Richer, Schmutz, Schönberner, Sharpee, Sharpee, Sterling, Tayal, Tayal, Vassiliadis, Wilson   +43 more
core   +1 more source

Who Is the System? On the Externalisation and Depersonalisation of Responsibility for Abuse

Systems Research and Behavioral Science, EarlyView.
ABSTRACT This article examines the externalisation and depersonalisation of responsibility in the institutional communication of the Roman Catholic Church in the context of sexualised violence. Niklas Luhmann's theory of social systems is used to show how semantic constructions such as ‘systemic causes’ rhetorically blur responsibility and contribute ...
Thomas Kron
wiley   +1 more source

Magnetic Fields in the Horsehead Nebula

The Astronomical Journal, 2023
We present the first polarized dust emission measurements of the Horsehead Nebula, obtained using the POL-2 polarimeter on the Submillimetre Common-User Bolometer Array 2 (SCUBA-2) camera on the James Clerk Maxwell Telescope.
Jihye Hwang, Kate Pattle, Harriet Parsons, Mallory Go, Jongsoo Kim   +4 more
doaj   +1 more source