Results 51 to 60 of about 1,814 (268)

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

A new flow chip in combination with multiphoton microscopy as a protocol for longitudinal 3D imaging of tissue calcification under shear stress

FEBS Open Bio, EarlyView.
Miniaturized flow chip platform enabling continuous perfusion and longitudinal multiphoton 3D imaging of vascular smooth muscle cell constructs under physiological flow. Brightfield imaging guides region selection, while CellTracker Green and mRuby‐labeled fetuin‐A visualize cells and mineral deposition, respectively. Magnesium supplementation markedly
Vytautas Kučikas, Aaron D. Morgan, Ignas Čiurlionis, Christian Böhm, Stefan Jockenhövel, Willi Jahnen‐Dechent, Marc A. M. J. van Zandvoort   +6 more
wiley   +1 more source

Secret of Longevity: Protoplanetary Disks as a Source of Gas in Debris Disks

The Astrophysical Journal
While protoplanetary disks (PPDs) are generally thought to disperse within several million years, recent observations have revealed gas in their older counterparts, debris disks.
Wataru Ooyama, Riouhei Nakatani, Takashi Hosokawa, Hiroto Mitani, Neal J. Turner   +4 more
doaj   +1 more source

Dynamo–Action in Accretion Disks [PDF]

Symposium - International Astronomical Union, 1993
Accretion disks are approximated by thin tori and the generation of magnetic fields by torus–dynamos is investigated. Solutions for the general α2ω–dynamo embedded into vacuum and into an ideally conducting medium are presented. Whereas the former solutions are qualitatively similar to those obtained for thin disks, there is a mode for the latter ...
openaire   +1 more source

Upper Cervical Cord Area as a Biomarker of Conversion to Secondary Progressive Multiple Sclerosis

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective This study assessed whether upper cervical cord area (UCCA) measured on routine brain MRI can serve as a biomarker of conversion to SPMS. Methods This is a single‐center retrospective cohort study of RRMS patients with cross‐sectional and longitudinal analyses of clinical and MRI data. Future SPMS converters were matched by age, sex,
Nabil K. El Ayoubi, Sola Al Ghazal, Salem Hannoun, Medhat A. Siddik, Nour M. Najjar, Jim Dagher, Joseph Abboud, Myriam G. Semaan, Samia J. Khoury   +8 more
wiley   +1 more source

Using the Ca ii Lines in T Tauri Stars to Infer the Abundance of Refractory Elements in the Innermost Disk Region

The Astrophysical Journal
We present a study of the abundance of calcium in the innermost disk of 70 T Tauri stars in the star-forming regions of Chamaeleon I, Lupus, and Orion OB1b. We use calcium as a proxy for the refractory material that reaches the inner disk.
Marbely Micolta, Nuria Calvet, Thanawuth Thanathibodee, Gladis Magris C., Carlo F. Manara, Laura Venuti, Juan Manuel Alcalá, Gregory J. Herczeg   +7 more
doaj   +1 more source

PROPERTIES OF GRAVITOTURBULENT ACCRETION DISKS [PDF]

The Astrophysical Journal, 2009
We explore the properties of cold gravitoturbulent accretion disks - non-fragmenting disks hovering on the verge of gravitational instability - using a realistic prescription for the effective viscosity caused by gravitational torques. This prescription is based on a direct relationship between the angular momentum transport in a thin accretion disk ...
openaire   +2 more sources

PASTA‐ELN: Simplifying Research Data Management for Experimental Materials Science

Advanced Engineering Materials, EarlyView.
Research data management faces ongoing hurdles as many ELNs remain complex and restrictive. PASTA‐ELN offers an open‐source, cross‐platform solution that prioritizes simplicity, offline access, and user control. Its in tuitive folder structure, modular Python add‐ons, and open formats enable seamless documentation, FAIR data practices, and easy ...
S. Brinckmann, G. Winkens, R. Schwaiger
wiley   +1 more source

Luminosity of accretion disks around rotating regular black holes

European Physical Journal C: Particles and Fields
We study thin accretion disks in the gravitational field of a class of rotating regular black holes. Our objective is to determine the key parameters governing these accretion disks: the radius of the innermost stable circular orbit $$(r_{\textrm{ISCO}})$
Kuantay Boshkayev, Talgar Konysbayev, Yergali Kurmanov, Orlando Luongo, Marco Muccino, Aliya Taukenova, Ainur Urazalina   +6 more
doaj   +1 more source

Radiatively Inefficient Accretion Disks [PDF]

, 2001
To appear in: The neutron star black hole connection (NATO ASI ELOUNDA 1999) ed. C. Kouveliotou et al.
openaire   +2 more sources