Results 71 to 80 of about 102,930 (210)

The Dynamics of the Spiral Galaxy M81 [PDF]

Symposium - International Astronomical Union, 1978
The spiral galaxy M81 is a challenging object for testing a density-wave theory. It is of large angular size and favourably inclined to the line of sight; radio observations of neutral atomic hydrogen showing well defined spiral arms with noncircular motions are available (Rots and Shane 1975), and there is evidence from surface photometry for density ...
openaire   +3 more sources

The cosmological constant derived via galaxy groups and clusters

, 2019
The common nature of dark matter and dark energy is argued in [1] based on the approach that the cosmological constant \Lambda enters the weak-field General Relativity following from Newton theorem on the "sphere-point mass" equivalency [2].
Gurzadyan, V. G., Stepanian, A.
core   +1 more source

Learning by helping: Evidence from Chinese brokerages' community CSR

Strategic Management Journal, EarlyView.
Abstract Research Summary We propose that firms engaging in community corporate social responsibility (CSR) can acquire valuable local knowledge that improves their core operations. We test our proposition leveraging a unique context‐the Securities Association of China's pairing assistance scheme under the country's targeted poverty alleviation program.
Jingyuan Li, Yong H. Kim, Jose Uribe
wiley   +1 more source

The Relation Between Halo Shape, Velocity Dispersion and Formation Time

, 2010
We use dark matter haloes identified in the MareNostrum Universe and galaxy groups identified in the Sloan Data Release 7 galaxy catalogue, to study the relation between halo shape and halo dynamics, parametrizing out the mass of the systems.
Allgood, Avila-Reese, Bailin, Basilakos, Berlind, Bett, Binney, Bullock, C. Ragone-Figueroa, Coziol, Crook, Eke, Faltenbacher, Faltenbacher, Faltenbacher, Finoguenov, Frederic, G. Yepes, Gal, Gerke, Gottlöber, Gottlöber, Gottlöber, Hickson, Hopkins, Hou, Huchra, Jing, Kasun, Kelm, Klypin, Lee, Lopes, M. Merchán, M. Plionis, Macció, Malykh, Merchán, Merchán, Nolthenius, Orlov, Paz, Plionis, Plionis, Ragone-Figueroa, Ramella, Robotham, S. Gottlöber, Sharma, Springel, Tago, Tago, Tovmassian, Tully, Van Haarlem, Wang, Wechsler, Yang, Yepes   +58 more
core   +1 more source

The Extremely Low Mechanical Force Generated by Nano‐Pulling Induces Global Changes in the Microtubule Network, Nuclear Morphology, and Chromatin Transcription in Neurons

Small, EarlyView.
Nano‐pulling induces stabilization, reorganization, and reorientation of the microtubule network. The nucleus of stretched cells experiences increased lateral tension, becomes more spherical, and develops surface grooves. At the level of gene expression regulation, changes in nuclear morphology induce global chromatin remodeling, leading to reduced ...
Alessandro Falconieri, Lorenzo Da Palmata, Valentina Cappello, Tiziana Julia Nadjeschda Schmidt, Pietro Folino, Barbara Storti, Ranieri Bizzarri, Vittoria Raffa   +7 more
wiley   +1 more source

Lopsidedness of cluster galaxies in modified gravity

, 2010
We point out an interesting theoretical prediction for elliptical galaxies residing inside galaxy clusters in the framework of modified Newtonian dynamics (MOND), that could be used to test this paradigm.
A. Knebe, Benoit Famaey, C. Llinares, F. Combes, F. Donato ., G. Gentile, G.W. Angus, H. Zhao, HongSheng Zhao, L. Ciotti, P. Londrillo, P.J.E. Peebles, S.S. McGaugh, Xufen Wu   +13 more
core   +2 more sources

Science Triggers and Situational Interest in Everyday Family Life

Journal of Research in Science Teaching, EarlyView.
ABSTRACT Interest in science is critical for science learning. The family plays a major role in supporting the development of children's interest in science by eliciting and fostering interest and engagement with science content and practice. This study characterizes triggers for interest in science in everyday family life and measures the duration of ...
Irit Vivante, Dana Vedder‐Weiss
wiley   +1 more source

Internal dynamics of the galaxy cluster Abell 959

, 2008
The connection of cluster mergers with the presence of extended, diffuse radio sources in galaxy clusters is still being debated. In this paper we aim to obtain new insights into the internal dynamics of Abell 959, showing evidence of a diffuse radio ...
Barrena, R., Boschin, W., Girardi, M.
core   +1 more source

Dynamical resonances in PHANGS galaxies

Astronomy & Astrophysics
Bars are remarkable stellar structures that can transport gas toward centers and drive the secular evolution of galaxies. In this context, it is important to locate dynamical resonances associated with bars. For this study, we used Spitzer near-infrared images as a proxy for the stellar gravitational potential and the ALMA CO(J = 2–1) gas distribution ...
Marina Ruiz-García, Miguel Querejeta, Santiago García-Burillo, Eric Emsellem, Sharon E. Meidt, Mattia C. Sormani, Eva Schinnerer, Thomas G. Williams, Zein Bazzi, Dario Colombo, Damian R. Gleis, Oleg Y. Gnedin, Ralf S. Klessen, Adam K. Leroy, Patricia Sánchez-Blázquez, Sophia K. Stuber   +15 more
openaire   +3 more sources

Dynamical Models of Elliptical Galaxies [PDF]

Symposium - International Astronomical Union, 1975
Self-consistent dynamical models of elliptical galaxies have been constructed using a modification of the Prendergast-Tomer algorithm. They reproduce many of the observed properties of elliptical galaxies.
openaire   +3 more sources