Results 71 to 80 of about 31,858 (173)

Modeling Solitonic Cores, Stabilization of Bar, and Suppression of Bar Dissolution in DDO 168 via GPP Formalism: A Detailed Analysis of Bose–Einstein Condensate/Fuzzy Dark Matter Halo Structure and Bar Dynamics in the Dwarf Galaxy DDO 168

The Astrophysical Journal
The cusp–core problem remains a challenge to the ΛCDM model, since dwarf galaxies often exhibit flat central density cores rather than the steep cusps ( ρ  ∝  r ^−1 ) predicted by collisionless N -body simulations.
Saroj Khanal, Sanjay Kumar Sah, Kiran Khanal, Sapana Khanal   +3 more
doaj   +1 more source

Dark matter dominated dwarf disc galaxy Segue 1

, 2009
Several observations reveal that dwarf galaxy Segue 1 has a dark matter (DM) halo at least ~ 200 times more massive than its visible baryon mass of only ~ 103 solar masses.
Babul, Belokurov, Benson, Blasi, Bullock, Einstein, Fan, Geha, Illingworth, Kauffmann, Klypin, Lou, Lou, Lou, Lou, Lou, Maraston, Martin, Mateo, Mateo, Meng Xiang-Gruess, Moore, Moore, Navarro, Niederste-Ostholt, Piatek, Putman, Quinn, Ricotti, Riehm, Simon, Somerville, Strigari, Walker, Walsh, Weinberg, Willman, Wolfgang J. Duschl, Wu, Xiang-Gruess, Yu-Qing Lou, Zackrisson, Zwicky, Zwicky   +43 more
core   +1 more source

The First Galaxies and the Likely Discovery of their Fossils in the Local Group [PDF]

, 2009
In cold dark matter cosmologies, small mass halos outnumber larger mass halos at any redshift. However, the lower bound for the mass of a galaxy is unknown, as are the typical luminosity of the smallest galaxies and their numbers in the universe.
Ricotti, Massimo
core   +3 more sources

Maximum Mass Limit of Generalized MIT Compact Star: A Theoretical Study of Thin Shell Dynamics and Gravitational Lensing

Fortschritte der Physik, Volume 73, Issue 8, August 2025.
Abstract In this study, the properties, equilibrium, and stability of compact objects within the framework of teleparallel gravity with the generalized MIT bag model are investigated. By incorporating the modified field equations, the influence of the generalized bag constant on the structure and physical characteristics of quark stars and neutron ...
Sayantan Ghosh, Sneha Pradhan, Pradyumn Kumar Sahoo   +2 more
wiley   +1 more source

Lactea: Web‐Based Spectrum‐Preserving Multi‐Resolution Visualization of the GAIA Star Catalog

Computer Graphics Forum, Volume 44, Issue 3, June 2025.
Abstract The explosion of data in astronomy has resulted in an era of unprecedented opportunities for discovery. The GAIA mission's catalog, containing a large number of light sources (mostly stars) with several parameters such as sky position and proper motion, is playing a significant role in advancing astronomy research and has been crucial in ...
Reem Alghamdi, Markus Hadwiger, Guido Reina, Alberto Jaspe‐Villanueva   +3 more
wiley   +1 more source

The sizes of mini-voids in the local universe: an argument in favor of a warm dark matter model?

, 2009
Using high-resolution simulations within the Cold and Warm Dark Matter models we study the evolution of small scale structure in the Local Volume, a sphere of 8 Mpc radius around the Local Group.
A. V. Tikhonov, Abazajian, Abazajian, Avila-Reese, Baugh, Begum, Begum, Bode, Bryan, Colberg, Colín, Crain, El-Ad, G. Yepes, Gottlöber, Hoeft, Hoffman, Hoffman, Karachentsev, Kazantzidis, Kirshner, Klypin, Knebe, Knollmann, Koposov, Macciò, Martinez-Vaquero, Miranda, Moore, Neto, Okamoto, Peebles, Peebles, Peñarrubia, S. Gottlöber, Spergel, Spergel, Springel, Steffen, Stoehr, Tikhonov, Tikhonov, van den Bosch, Viel, Viel, Viel, Wang, Y. Hoffman, Zavala   +48 more
core   +1 more source

An extensive study of dynamical friction in dwarf galaxies: the role of stars, dark matter, halo profiles and MOND

, 2006
We investigate the in-spiraling timescales of globular clusters in dwarf spheroidal (dSph) and dwarf elliptical (dE) galaxies, due to dynamical friction. We address the problem of these timescales having been variously estimated in the literature as much
Begeman, Bekenstein, Binney, Binney, Binney, Blais-Ouellette, Bottema, Brada, Buonanno, Ciotti, Coleman, Colpi, De Blok, De Blok, Dubath, F. J. Sánchez-Salcedo, Fall, Fuchs, Gentile, Gentile, Goerdt, Gunn, Hashimoto, Hayashi, Held, Hernandez, Hernandez, Hodge, Hubble, Jin, Jorge Reyes-Iturbide, Just, Kazantzidis, King, Kleyna, Kleyna, Kleyna, Kregel, Lacey, Lake, Lotz, Mackey, Magorrian, Mateo, Mayer, McGaugh, Milgrom, Milgrom, Navarro, Navarro, Oh, Pointecouteau, Pryor, Read, Read, Sanders, Sanders, Spekkens, Stoehr, Sánchez-Salcedo, Sánchez-Salcedo, Sánchez-Salcedo, Taffoni, The, Tremaine, Van Den Bosch, Walcher, Walker, Walker, Wang, White, X. Hernandez, Łokas, Łokas, Łokas, Łokas   +75 more
core   +1 more source

Deciphering the role of epistemic injustice in school‐based citizen science: Sources, implications, and possible ways for mitigation

Journal of Research in Science Teaching, Volume 62, Issue 5, Page 1350-1387, May 2025.
Abstract Participation in citizen science, a research approach in which nonscientists take part in performing research, is a growing practice in schools. A main premise in school‐based citizen science is that through their participation, students and teachers make meaningful contributions to the advancement of science.
Osnat Atias, Ayelet Shavit, Yael Kali, Ayelet Baram‐Tsabari   +3 more
wiley   +1 more source

Hindu Avatāra and Christian Kenosis: A New Approach in Comparative Theology1

The Heythrop Journal, Volume 66, Issue 3, Page 223-237, May 2025.
Abstract Within comparative theology, the Hindu doctrine of avatāra has traditionally been compared to the Christian doctrine of the incarnation, both of which are expressions of divine embodiment in creaturely form. This article, however, contrasts the doctrine of avatāra with a reading of the incarnation that frames the latter within the broader ...
Christian J. Ivandić
wiley   +1 more source

The cosmological Lithium problem outside the Galaxy: the Sagittarius globular cluster M54

, 2014
The cosmological Li problem is the observed discrepancy between Li abundance, A(Li), measured in Galactic dwarf, old and metal-poor stars (traditionally assumed to be equal to the initial value A(Li)_0), and that predicted by standard Big Bang ...
Bonifacio, P., Monaco, L., Mucciarelli, A., Salaris, M., Villanova, S.   +4 more
core   +3 more sources