Results 81 to 90 of about 67,210 (214)

Spiral arm crossings inferred from ridges in Gaia stellar velocity distributions

, 2018
The solar neighborhood contains disc stars that have recently crossed spiral arms in the Galaxy. We propose that boundaries in local velocity distributions separate stars that have recently crossed or been perturbed by a particular arm from those that ...
Anders, Friedrich, Carrillo, Ismael, Chiappini, Cristina, Hilmi, Tariq, Khalatyan, Arman, McMillan, Paul, Minchev, Ivan, Monari, Giacomo, Quillen, Alice C., Steinmetz, Matthias   +9 more
core   +1 more source

The Chemical Evolution Carousel of Spiral Galaxies : Azimuthal Variations of Oxygen Abundance in NGC1365 [PDF]

, 2017
19 pages, 13 figures. Accepted to ApJThe spatial distribution of oxygen in the interstellar medium of galaxies is the key to understanding how efficiently metals that are synthesized in massive stars can be redistributed across a galaxy.
Alloin D., Balser D. S., Barry F. Madore, Bigiel F., Blanc G. A., Brent A. Groves, Bresolin F., Bresolin F., Cappellari M., Chiaki Kobayashi, Croxall K. V., de Avillez M. A., de Vaucouleurs G., Dobbs C., Dopita M. A., Edmunds M. G., Elmegreen B. G. ed Friedli D., Eva Schinnerer, Helmboldt J. F., Henry Poetrodjojo, Ho I.-T., I-Ting Ho, Jang I. S., Jarrett T. H., Jeffrey A. Rich, Joshua D’Agostino, Kewley L. J., Kewley L. J., Kobayashi C., Kreckel K., Kudritzki R. P., Leitherer C., Lequeux J., Leroy A. K., Li Y., Lilly S. J., Lindblad P. A. B., Lisa J. Kewley, Mark Seibert, Markwardt C. B. ed Bohlender D. A., Masset F., Muñoz-Mateos J. C., Rolf-Peter Kudritzki, Rosolowsky E., Roy J.-R., Sanders R. L., Sharon E. Meidt, Speights J. C., Sánchez-Menguiano L., Thilker D. A., Thilker D. A., Torrey P., Tremonti C. A., Vera-Villamizar N., Yuan T.-T., Zahid H. J., Zahid H. J., Zurita A., Zánmar Sánchez R.   +58 more
core   +4 more sources

Les galaxies spirales

, 2021
Notre vision des galaxies a beaucoup changé depuis l’ère des grands relevés de galaxies, tels que le Sloan, qui nous apportent une grande statistique avec des millions de galaxies. La classification de la séquence de Hubble est toujours très utilisée, mais elle s’est enrichie de grandes catégories basées sur les couleurs, qui tracent la formation ...
openaire   +1 more source

SECULAR EVOLUTION OF SPIRAL GALAXIES [PDF]

Journal of The Korean Astronomical Society, 2003
15 pages, 8 figures, Invited talk presented at the 2nd APCTP workshop on Astrophysics, Pohang, Korea (June 2002)
openaire   +2 more sources

In perennial Arabis alpina, CONSTANS and FLOWERING LOCUS T have common and distinct effects on flowering and inflorescence architecture

New Phytologist, Volume 250, Issue 2, Page 970-987, April 2026.
Summary Flowering of perennial Arabis alpina is differentially regulated on primary and axillary shoots. Although contributions of vernalization and ageing pathways have been analysed, those of photoperiodic flowering genes CONSTANS (CO), FLOWERING LOCUS T (FT), and TWIN‐SISTER OF FT (TSF) remain unexplored.
Niharika Sashidhar, George Coupland
wiley   +1 more source

JWST Insight into a Lensed HST-dark Galaxy and Its Quiescent Companion at z = 2.58

The Astrophysical Journal Letters, 2023
Using the novel James Webb Space Telescope (JWST)/NIRCam observations in the A2744 field, we present a first spatially resolved overview of a Hubble Space Telescope (HST)-dark galaxy, spectroscopically confirmed at z = 2.58 with magnification μ ≈ 1.9 ...
Vasily Kokorev, Shuowen Jin, Georgios E. Magdis, Karina I. Caputi, Francesco Valentino, Pratika Dayal, Maxime Trebitsch, Gabriel Brammer, Seiji Fujimoto, Franz Bauer, Edoardo Iani, Kotaro Kohno, David Blánquez Sesé, Carlos Gómez-Guijarro, Pierluigi Rinaldi, Rafael Navarro-Carrera   +15 more
doaj   +1 more source

Spiral structure in external galaxies [PDF]

Symposium - International Astronomical Union, 1970
The need for observing at least four different categories of optical objects for a satisfactory definition of optical spiral structure is emphasized. A sequence of optical form-types for the description of spiral structure is outlined. A pronounced difference in the nature of the spiral structure of the outer and inner parts of Messier 33 is ...
openaire   +1 more source

Substituent‐Based Modulation of Self‐Assembly and Immunogenicity of Amphipathic Peptides

Advanced Science, Volume 13, Issue 18, 27 March 2026.
This study systematically investigates how positional and subtle changes, such as substituents on the phenyl ring attached to short amphipathic peptides, influence their self‐assembly, fibril morphology, and immunogenic responses. ABSTRACT Self‐assembled peptide‐based biomaterials provide versatile platforms for biomedical uses, featuring customizable ...
Anirban Das, Ushasi Pramanik, Elise M. Brown, Chih‐Yun Liu, Huan Gong, Jonathan Fascetti, Mark Gibson, Samuel Stealey, Silviya P. Zustiak, Cory Berkland, Piyoosh Sharma, Meredith E. Jackrel, Mark A. White, Jai S. Rudra   +13 more
wiley   +1 more source

A Comprehensive Analysis on the Nature of the Spiral Arms in NGC 3686, NGC 4321, and NGC 2403

Galaxies
In theoretical investigations, various mechanisms have been put forward to explain the emergence of spiral patterns in galaxies. One of the few ways to find out the nature of spirals in a particular galaxy is to consider the so-called corotation radius ...
Valeria Kostiuk, Alexander Marchuk, Alexander Gusev, Ilia V. Chugunov   +3 more
doaj   +1 more source

The Effect of Corotation on the Radial Gradient of Metallicity of Spiral Galaxies

, 2010
The corotation radius in a spiral galaxy is the radius where the spiral pattern speed has the same velocity of the rotation curve. By compiling results from the literature for 20 spiral galaxies we verified a strong correlation between the radius of the ...
Lepine, J. R. D., Scarano Jr., S.
core   +1 more source