Results 31 to 40 of about 59,557 (297)

LAMOST Reveals Long-lived Protoplanetary Disks

The Astronomical Journal
While both observations and theories demonstrate that protoplanetary disks are not expected to live much longer than ∼10 Myr, several examples of prolonged disks have been observed in the past.
Xiao-Long Wang, Min Fang, Yao Liu, Miao-Miao Zhang, Wen-Yuan Cui   +4 more
doaj   +1 more source

Transitional disks and their origins: an infrared spectroscopic survey of Orion A

, 2013
Transitional disks are protoplanetary disks around young stars, with inner holes or gaps which are surrounded by optically thick outer, and often inner, disks.
Arnold, Laura, Calvet, Nuria, Espaillat, Catherine, Forrest, W. J., Furlan, Elise, Green, Joel D., Kim, K. H., Manoj, P., Megeath, Tom, Muzerolle, James, Najita, Joan, Sargent, Benjamin, Watson, Dan M.   +12 more
core   +1 more source

Naked cuticle is essential for Drosophila wing development beyond Wingless signaling

FEBS Open Bio, EarlyView.
Naked cuticle (Nkd), a Wnt signaling inhibitor, assumes extensive roles in Drosophila wing development. Overexpressing Nkd causes smaller, crumpled wings, while also perturbing multiple signaling pathways and developmental genes. A specific region (R1S) is critical for Nkd's function as a signaling integrator, offering new insights for studying its ...
Rui Wang, Ping Wang
wiley   +1 more source

Accretion Disks around Young Stars: Lifetimes, Disk Locking and Variability [PDF]

, 2006
We report the findings of a comprehensive study of disk accretion and related phenomena in four of the nearest young stellar associations spanning 6-30 million years in age, an epoch that may coincide with the late stages of planet formation.
Alexander Scholz, Alexis Brandeker, Camenzind O., Jaime Coffey, Marten H. van Kerkwijk, Ray Jayawardhana, Rebull L. M.   +6 more
core   +3 more sources

Evaluation of the Efficacy and Safety of Satralizumab in a Pregnant NMOSD Patient With AQP4/MOG‐IgG Dual Seropositive: A Case Report

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Neuromyelitis Optica Spectrum Disorder (NMOSD) is a chronic autoimmune neuroinflammatory disease, typically characterized by antibodies against aquaporin 4 (AQP4‐IgG) or myelin oligodendrocyte glycoprotein (MOG‐IgG). Simultaneous seropositivity for both antibodies in a single patient is exceedingly rare.
Yeting Luo, Shuhua Xie, Xianghong Liu
wiley   +1 more source

Radiation and Magnetic Pressure Support in Accretion Disks Around Supermassive Black Holes and the Physical Origin of the Extreme-ultraviolet to Soft X-Ray Spectrum

The Astrophysical Journal
We present the results of four 3D radiation magnetohydrodynamic simulations of accretion disks around a 10 ^8 solar mass black hole, which produce the far-ultraviolet spectrum peak and demonstrate a robust physical mechanism for producing the extreme ...
Yan-Fei Jiang, Omer Blaes, Ish Kaul, Lizhong Zhang   +3 more
doaj   +1 more source

Lyα Scattering Models Trace Accretion and Outflow Kinematics in T Tauri Systems

The Astrophysical Journal, 2023
T Tauri stars produce broad Ly α emission lines that contribute ∼88% of the total UV flux incident on the inner circumstellar disks. Ly α photons are generated at the accretion shocks and in the protostellar chromospheres and must travel through ...
Nicole Arulanantham, Max Gronke, Eleonora Fiorellino, Jorge Filipe Gameiro, Antonio Frasca, Joel Green, Seok-Jun Chang, Rik A. B. Claes, Catherine C. Espaillat, Kevin France, Gregory J. Herczeg, Carlo F. Manara, Laura Venuti, Péter Ábrahám, Richard Alexander, Jerome Bouvier, Justyn Campbell-White, Jochen Eislöffel, William J. Fischer, Ágnes Kóspál, Miguel Vioque   +20 more
doaj   +1 more source

On the structure of Accretion Disks with Outflows

, 2011
In order to study the outflows from accretion disks, we solve the set of hydrodynamic equations for accretion disks in the spherical coordinates ($r\theta\phi$) to obtain the explicit structure along the $\theta$ direction. Using self-similar assumptions
Blandford, Chartas, Cheng-Liang Jiao, Fukue, Fukue, Gu, Hirose, Igumenshchev, Jiao, Jiao, Kato, Kawabata, Kluzniak, Loeb, Marrone, Misra, Ohsuga, Ohsuga, Ohsuga, Shakura, Takeuchi, Xie, Xu, Xue, Xue-Bing Wu   +24 more
core   +1 more source

Is Young's Modulus a Critical Coating Property Determining Fouling‐Release Performance of Marine Coatings?

Advanced Engineering Materials, EarlyView.
The release of foulers from protective marine coatings is determined by several interrelated material properties, including the strength of Young's modulus, the flexibility of chain segments, the surface free energy, and the magnitude of hydrodynamic stress.
Johann C. Schaal, Andreas Brinkmann, Andreas Hartwig   +2 more
wiley   +1 more source

Planetary formation and early phases

Comptes Rendus. Physique, 2023
Planets form in proto-planetary disks. In this review, we describe the structure and properties of such disks, and the various phenomenons that lead to the final product: a planetary system. First, micrometre dust settles and coagulates.
Crida, Aurélien
doaj   +1 more source