Results 41 to 50 of about 2,487 (263)

Are galaxy discs optically thick? [PDF]

Monthly Notices of the Royal Astronomical Society, 1989
The classical optical evidence for the low optical depths traditionally assigned to spiral disks is reexamined, suggesting that it is highly model-dependent and unconvincing. In particular, layered models with a physically thin but optically thick dust layer behave like optically thin disks.
Michael Disney, Jonathan Davies, Steven Phillipps   +2 more
openaire   +1 more source

Modeling disc non-axisymmetries: Multiple patterns, radial migration, and thick disks

EPJ Web of Conferences, 2012
Disc non-axisymmetric components, such as spirals and central bars, are nowadays known to play an important role in shaping galactic discs. Here we use Tree-SPH N-body simulations to examine the effect of these perturbers on two aspects: the occurrence ...
Dehnen W., Quillen A.C., Minchev I., Famaey B.   +3 more
doaj   +1 more source

MEGADES: MEGARA galaxy disc evolution survey

Astronomy & Astrophysics
We present the ionised gas properties and metallicity gradients of the central area of a sample of 43 galaxies using observations obtained by the MEGADES survey.
Chamorro-Cazorla M., Gil de Paz A., Castillo-Morales A., Camps-Fariña A., Gallego J., Carrasco E., Iglesias-Páramo J., Cedazo R., García-Vargas M. L., Pascual S., Cardiel N., Pérez-Calpena A., Gómez-Álvarez P., Martínez-Delgado I., Catalán-Torrecilla C., Zamorano J.   +15 more
doaj   +1 more source

Cosmological formation of disc galaxies [PDF]

Proceedings of the International Astronomical Union, 2006
AbstractWe review the current status of cosmological simulations of the formation and evolution of disc galaxies, discussing in particular the Tully-Fisher relation and its redshift evolution.
Laura Portinari, Jesper Sommer–Larsen
openaire   +1 more source

Triazine‐Trione Thermosets with High Processability for Scaffold Applications in Bone Tissue Engineering

Advanced Healthcare Materials, EarlyView.
Novel photo‐clickable triazine‐trione thermosets can be shaped and cured under mild conditions, including room and physiological temperatures. These materials are biocompatible and support osteogenic differentiation of bone marrow–derived mesenchymal stem cells on their surface.
Åshild Johansen, Shuntaro Yamada, Daniel J. Hutchinson, Mohammed A. Yassin, Samih Mohamed‐Ahmed, Cecilie Gjerde, Michael Malkoch, Kamal Mustafa   +7 more
wiley   +1 more source

The GECKOS survey: The formation history of a barred galaxy via structural decomposition and spatially resolved spectroscopy

Astronomy & Astrophysics
Disentangling the (co-)evolution of individual galaxy structural components remains a difficult task, owing to the inability to cleanly isolate light from spatially overlapping components. In this pilot study of PGC 044931, observed as part of the GECKOS
Fraser-McKelvie A., Gadotti D. A., Fragkoudi F., de Sá-Freitas C., Martig M., Bureau M., Davis T., Emsellem E., Elliott R., Fisher D., Hayden M., van de Sande J., Watts A. B.   +12 more
doaj   +1 more source

End‐to‐End Sensing Systems for Breast Cancer: From Wearables for Early Detection to Lab‐Based Diagnosis Chips

Advanced Materials Technologies, EarlyView.
This review explores advances in wearable and lab‐on‐chip technologies for breast cancer detection. Covering tactile, thermal, ultrasound, microwave, electrical impedance tomography, electrochemical, microelectromechanical, and optical systems, it highlights innovations in flexible electronics, nanomaterials, and machine learning.
Neshika Wijewardhane, Lyn I. Jones, Richard M. Martin, Helen Winter, Faezeh Arab Hassani   +4 more
wiley   +1 more source

Galaxy disc scaling relations: A tight linear galaxy–halo connection challenges abundance matching [PDF]

Astronomy & Astrophysics, 2019
In ΛCDM cosmology, to first order, galaxies form out of the cooling of baryons within the virial radius of their dark matter halo. The fractions of mass and angular momentum retained in the baryonic and stellar components of disc galaxies put strong constraints on our understanding of galaxy formation.
Posti, Lorenzo, Marasco, Antonino, Fraternali, Filippo, Famaey, Benoit   +3 more
openaire   +3 more sources

Versatile Gasochromic Hydrogen Detection via Supraparticle‐Based Applied Composite Materials

Advanced Optical Materials, EarlyView.
Silica‐platinum‐resazurin supraparticles are embedded into PMMA to form suprabeads and thin films. The thereby obtained indicators change color from purple to pink to colorless on hydrogen exposure. The indicator systems are tested under various environmental conditions, and their performance is related to their microscopically visualized structure ...
Sarah Wenderoth, Maximilian Oppmann, Daniel Dzoic, Thomas Zimmermann, Mickaël Lejoyeux, Andreas Graff, Benedikt Schug, Susanne Wintzheimer   +7 more
wiley   +1 more source

Active galactic nucleus outflows in galaxy discs [PDF]

Monthly Notices of the Royal Astronomical Society, 2018
22 pages, 22 figures, published in ...
Hartwig, Tilman, Volonteri, Marta, Dashyan, Gohar   +2 more
openaire   +3 more sources