Results 71 to 80 of about 84,923 (296)

Spots structure and stratification of helium and silicon in the atmosphere of He-weak star HD 21699

, 2009
The magnetic star HD 21699 possesses a unique magnetic field structure where the magnetic dipole is displaced from the centre by 0.4 +/- 0.1 of the stellar radius (perpendicularly to the magnetic axis), as a result, the magnetic poles are situated close ...
A. V. Shavrina, Abt, Alecian, Brown, Donati, Donati, G. A. Chuntonov, Gerth, Glagolevskij, Glagolevskij, Glagolevskij, Grevesse, J. Silvester, Khan, Kupka, Megessier, Molnar, Monin, Morgan, Osmer, Pavlenko, Pavlenko, Percy, Preston, Roman, Ryabchikova, Shore, Smith, Smith, Stateva, Tsymbal, V. R. Khalack, Vauclair, Vauclair, Vauclair, Wade, Ya. V. Pavlenko, Yu. V. Glagolevskij   +37 more
core   +1 more source

Development of a Prediction Model for Progression Risk in High‐Grade Gliomas Based on Habitat Radiomics and Pathomics

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective To investigate the value of constructing models based on habitat radiomics and pathomics for predicting the risk of progression in high‐grade gliomas. Methods This study conducted a retrospective analysis of preoperative magnetic resonance (MR) images and pathological sections from 72 patients diagnosed with high‐grade gliomas (52 ...
Yuchen Zhu, Yuxi Gong, Weilin Xu, Xingjian Sun, Gefei Jiang, Lei Qiu, Kexin Shi, Mengxing Wu, Yinjiao Fei, Jinling Yuan, Jinyan Luo, Yurong Li, Yuandong Cao, Minhong Pan, Shu Zhou   +14 more
wiley   +1 more source

The direct effect of a toroidal magnetic field on stellar oscillations

Astronomy & Astrophysics
Context. Magnetic fields affect stellar oscillations through eigenmode mixing. If the contribution of a magnetic field to the stellar oscillation frequency is weak, this mode coupling can be determined using perturbation theory.
Lindner Johannes, Roth Markus
doaj   +1 more source

Interactions between exoplanets and the winds of young stars

EPJ Web of Conferences, 2014
The topology of the magnetic field of young stars is important not only for the investigation of magnetospheric accretion, but also responsible in shaping the large-scale structure of stellar winds, which are crucial for regulating the rotation evolution
Vidotto A. A., Opher M., Jatenco-Pereira V., Gombosi T. I.   +3 more
doaj   +1 more source

Relationships Between Solar and Stellar Magnetic Fields [PDF]

Symposium - International Astronomical Union, 1983
Observational and theoretical studies of solar and stellar magnetic fields are reviewed. The discussion draws together several themes that emerged during IAU Symposium 102 on “Solar and Stellar Magnetic Fields: Origins and Coronal Effects,” and identifies a number of areas in which research over the next few years is likely to be fruitful.
openaire   +1 more source

An electrically powered binary star? [PDF]

, 2001
We propose a model for stellar binary systems consisting of a magnetic and a non-magnetic white-dwarf pair which is powered principally by electrical energy.
Alfvén, Clarke, Cropper, Drell, Faulkner, Gavin Ramsay, Goldreich, Kazuhiro Sekiguchi, Kinwah Wu, Li, Mark Cropper, Motch, Neubauer, Paczyn´ski, Paddington, Ramsay, Spitzer   +16 more
core   +2 more sources

Meningovascular Inflammation in Cerebral Amyloid Angiopathy‐Related Cortical Superficial Siderosis

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT The role of inflammation in cortical superficial siderosis (cSS), a marker of cerebral amyloid angiopathy (CAA) linked to high hemorrhage risk, is unclear. We examined 15 patients with cSS using 3 T post‐contrast vessel wall MRI (VWI) and CSF analysis.
Philipp Arndt, Eya Khadhraoui, Sebastian J. Müller, Katja Neumann, Hendrik Mattern, Sven G. Meuth, Valentina Perosa, Andreas Charidimou, Stefanie Schreiber   +8 more
wiley   +1 more source

Modeling YSO Jets in 3D. II. Accretion-fed, Star-anchored Poynting Jets in the Low-density Polar Cavity Powered by Disk–Magnetosphere Interaction

The Astrophysical Journal
The origin of the jets in young stellar objects (YSOs) remains a subject of active investigation. We present a 3D MHD simulation of the jet launching in YSOs, focusing on the interaction between the stellar magnetosphere and the accretion disk.
Yisheng Tu, Zhi-Yun Li, Zhaohuan Zhu, Xiao Hu, Chun-Yen Hsu   +4 more
doaj   +1 more source

Analytic and numerical models of the 3D multipolar magnetospheres of pre-main sequence stars

, 2011
Traditionally models of accretion of gas on to T Tauri stars have assumed a dipole stellar magnetosphere, partly for simplicity, but also due to the lack of information about their true magnetic field topologies.
Altschuler, Aly, Argiroffi, Bagnulo, Bessolaz, Collier Cameron, Donati, Donati, Donati, Donati, Donati, Donati, Donati, Donati, Donati, Donati, Dunstone, Flaccomio, Goodson, Goossens, Gregory, Gregory, Gregory, Gregory, Gregory, Gregory, Hartmann, Hussain, Hussain, Jardine, Jardine, Jardine, Johns-Krull, Johns-Krull, Johnstone, Kurosawa, Königl, Küker, Loinard, Long, Long, Long, Marsden, Matt, Miller, Mohanty, Morin, Morin, Morin, Orlando, Petrov, Preston, Riley, Romanova, Romanova, Romanova, Romanova, Ruan, Safier, Schatten, Schulz, Schwarzschild, Shu, Stibbs, Valenti, von Rekowski, Yang, Zanni   +67 more
core   +1 more source

Value of MRI Outcomes for Preventive and Early‐Stage Trials in Spinocerebellar Ataxias 1 and 3

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective To examine the value of MRI outcomes as endpoints for preventive and early‐stage trials of two polyglutamine spinocerebellar ataxias (SCAs). Methods A cohort of 100 participants (23 SCA1, 63 SCA3, median Scale for the Assessment and Rating of Ataxia (SARA) score = 5, 42% preataxic, and 14 gene‐negative controls) was scanned at 3T up ...
Thiago J. R. Rezende, Emilien Petit, Young Woo Park, Sophie Tezenas du Montcel, James M. Joers, Jonathan M. DuBois, H. Moore Arnold, Michal Povazan, Ipek Özdemir, Guita Banan, Romain Valabregue, Philipp Ehses, Jennifer Faber, Chiadi U. Onyike, Peter B. Barker, Jeremy D. Schmahmann, Eva‐Maria Ratai, Sub H. Subramony, Thomas H. Mareci, Khalaf O. Bushara, Henry Paulson, Thomas Klockgether, Alexandra Durr, Tetsuo Ashizawa, Christophe Lenglet, Gülin Öz, READISCA Investigators   +26 more
wiley   +1 more source