Results 91 to 100 of about 233,279 (344)

Malin 1: interacting galaxy pair?

, 2010
Malin 1 is a unique, extraordinarily large low surface brightness galaxy. The structure and the origins of the galaxy are poorly understood. The reason for such a situation is an absence of detailed observational data, especially, of high-resolution ...
A. V. Moiseev, Afanasiev, Athanassoula, Barth, Bothun, Hernquist, Horellou, Impey, Kormendy, Lelli, Lynds, Mapelli, Matthews, Moore, N. Ya. Sotnikova, Pickering, Pierani, Rosenbaum, Rosenbaum, Sanchez-Blazquez, Sancisi, Seigar, Simien, V. P. Reshetnikov, Zasov   +24 more
core   +1 more source

Quasi-Stationary Spiral Structure in Galaxies [PDF]

Symposium - International Astronomical Union, 1983
The hypothesis of quasi-stationary spiral structure in galaxies was explicitly formulated in the early 1960's in papers of Bertil Lindblad and of Lin and Shu. It asserts that the grand design observed in spiral galaxies may be described by the superposition (and interaction) of a small number of spiral modes.
openaire   +1 more source

Orientation of galaxies in structures [PDF]

Astrophysics, 2013
Preliminary version of the paper from Astrophysics 56, p.322 send to Astrofizika ...
Panko, Elena, Piwowarska, Paulina, Godlowska, Jolanta, Godlowski, Wlodzimierz, Flin, Piotr   +4 more
openaire   +2 more sources

Form flows function: Learner‐centered game Re‐design in a STEM classroom

British Educational Research Journal, EarlyView.
Abstract Re‐designing games facilitates interest‐driven learning and immerses learners in systems thinking. However, there are limited studies exploring how the form and function of tabletop games influence learners' design decisions and learning experiences. To address this gap, we conducted a mixed‐methods study in a STEM classroom in western Canada.
Farzan Baradaran Rahimi, Beaumie Kim, Shima Dadkhahfard   +2 more
wiley   +1 more source

THE ROLE OF POOR GALAXY CLUSTERS FOR STUDYING SUPERCLUSTER STRUCTURE

Odessa Astronomical Publications, 2008
The distribution of galaxy clusters is analyzed in regions of 6 galaxy superclusters with both measured and estimated redshifts. The positions of ACO and APM galaxy clusters in the regions are compared with the positions of galaxy clusters and groups ...
E. A. Panko
doaj   +1 more source

The Origin of Star-forming Rings in S0 Galaxies

The Astrophysical Journal, 2023
Spatially resolved integral field spectroscopic maps in a sample of 532 S0 galaxies from the MaNGA survey have unveiled the existence of inner rings (〈 R 〉 ∼ 1 R _e ) betraying ongoing star formation in a number of these objects.
J. L. Tous, H. Domínguez-Sánchez, J. M. Solanes, J. D. Perea   +3 more
doaj   +1 more source

Dynamical Evolution of Elliptical Galaxies with Central Singularities

, 1997
We study the effect of a massive central singularity on the structure of a triaxial galaxy using N-body simulations. Starting from a single initial model, we grow black holes with various final masses Mh and at various rates, ranging from impulsive to ...
Allen A. J., Bender R., Binney J. J., David Merritt, Dehnen W., Eckart A., Friedli D., Gerald D. Quinlan, Gerhard O. E., Goodman J., Kaufmann D. E., Kormendy J., Lynden-Bell D., May A., Noguchi M., Pfenniger D., Pfenniger D., Soltan A., Udry S., Udry S.   +19 more
core   +2 more sources

Subterranean environments contribute to three‐quarters of classified ecosystem services

Biological Reviews, EarlyView.
ABSTRACT Beneath the Earth's surface lies a network of interconnected caves, voids, and systems of fissures forming in rocks of sedimentary, igneous, or metamorphic origin. Although largely inaccessible to humans, this hidden realm supports and regulates services critical to ecological health and human well‐being.
Stefano Mammola, David Brankovits, Tiziana Di Lorenzo, Isabel R. Amorim, Raluca Ioana Bancila, Adrià Bellvert, Enrico Bernard, Anna Blomberg, Paulo A.V. Borges, Martina Cappelletti, Rodrigo Lopes Ferreira, Rosalina Gabriel, Diana M. P. Galassi, Laura Garzoli, Vasilis Gerovasileiou, Grant C. Hose, Kathryn L. Korbel, Simone Martino, Ana Z Miller, Nataša Mori, Veronica Nanni, Giuseppe Nicolosi, Mattia Saccò, Troy S. Sakihara, Marconi Souza Silva, Anne E. Tamalavage, Maja Zagmajster, Efraín Chávez, Christian Griebler, Pedro Cardoso, Alejandro Martínez   +30 more
wiley   +1 more source

VMC galaxy structures

, 2019
Formation and evolution of galaxies are mainly driven by mergers/interactions. In low red shift, minor mergers play a significant role. It is believed that they are the fundamental components in the formation of the halo of galaxies like Milky Way and in building the outskirts of massive elliptical galaxies. The signatures of these mergers/interactions
openaire   +1 more source

Chlorinated Paracyclophanes: Composition Analysis and Direct Metal‐Free Alkylation with n‐BuLi

European Journal of Organic Chemistry, EarlyView.
A transition‐metal‐free alkylation of pseudo‐para dichloro[2.2]paracyclophane (Cl2‐PCP) is reported, utilizing the purified pseudo‐para isomer and n‐butyllithium (BuLi). Optimization with the chelating agent TMEDA and refluxing n‐heptane significantly boosted selectivity and reaction rate, providing the dialkylated product in 22% isolated yield.
Davide Frigatti, Alessandro Scarso, Stefan Bräse, Fabrizio Fabris   +3 more
wiley   +1 more source