Results 51 to 60 of about 74,154 (347)

Traversable wormholes supported by dark matter and monopoles with semiclassical effects

European Physical Journal C: Particles and Fields, 2023
We present a new traversable wormhole explication of Einstein’s field equations supported by the profile of Einasto Dark Matter densities (Einasto in Trudy Inst Astrofiz Alma-Ata 51:87, 1965; PTarO 36:414, 1968; Astron Nachr 291:97, 1969) and global ...
Farook Rahaman, Bidisha Samanta, Nayan Sarkar, Biplab Raychaudhuri, Banashree Sen   +4 more
doaj   +1 more source

AXIONS AND THEIR DISTRIBUTION IN GALACTIC HALOS [PDF]

The Identification of Dark Matter, 2003
10 pages, 1 figure, invited talk at the IDM2002 conference, September 2-6, 2002 in York ...
openaire   +3 more sources

CMB as a possible new tool to study the dark baryons in galaxies [PDF]

, 2012
Baryons constitute about 4% of our universe, but most of them are missing and we do not know where and in what form they are hidden. This constitute the so-called missing baryon problem.
A A Nucita, A L Kashin, A Qadir, Ade P A R (Planck Collaboration), Alcock C, Anderson M E, Ansari R, Ashman K M, Aurière M, Bennett C L, Binney J, Binney J, Bregman J N, Calchi Novati, Calchi Novati S, Ceccarelli C, Cen R, Cen R, Chemin L, Chiappini C, Cooray A, Courteau S, D Vetrugno, Dai X, De Paolis F, De Paolis F, De Paolis F, De Paolis F, Draine B, Drake A J, F De Paolis, G Ingrosso, Gerhard O, Grenacher L, Gurzadyan V G, H G Khachatryan, Hoekstra H, Jarosik N, Larson R B, Lin C Y, Oort J H, Pfenniger D, Pfenniger D, Pfenniger D Combes F, Ph Jetzer, Richter P, Riffeser A, S Mirzoyan, Sommer-Larsen J, V G Gurzadyan, Wakker B P, Walker M   +51 more
core   +1 more source

Estimation of Galactic Model Parameters and Metalicity Distribution in Intermediate Latitudes with SDSS [PDF]

, 2009
We estimated the galactic model parameters for a set of 20 intermediate-latitude fields with galactic longitudes ...
Adelman-McCarthy, Ak, Ak, Alves, Belokurov, Bertin, Bilir, Bilir, Bilir, Bilir, Bilir, Bilir, Brosche, Buser, Buser, Cabrera-Lavers, Carollo, Chen, de Vaucouleurs, Debattista, Drimmel, Du, Du, E. Yaz, Fan, Fukugita, Gilmore, Gilmore, Griffin, Halbwachs, Helmi, Hernquist, Jurić, Karaali, Karaali, Karaali, Kent, Kroupa, Kroupa, Kroupa, López-Corredoira, López-Corredoira, Malmquist, Marshall, Momany, Narayan, Newberg, Odenkirchen, Phleps, Phleps, Reid, Reid, S. Karaali, Schlegel, Siegel, Xu, Young   +56 more
core   +2 more sources

A Different Perspective on the Solid Lubrication Performance of Black Phosphorous: Friend or Foe?

Advanced Engineering Materials, EarlyView.
Researchers investigate black phosphorous (BP) as a standalone solid lubricant coating through ball‐on‐disc linear‐reciprocating sliding experiments in dry conditions. Testing on different metals shows BP doesn't universally reduce friction and wear. However, it achieves 33% friction reduction on rougher iron surfaces and 23% wear reduction on aluminum.
Matteo Vezzelli, Manel Rodríguez Ripoll, Sabine Schwarz, Ali Erdemir, Maria Clelia Righi, Carsten Gachot   +5 more
wiley   +1 more source

Impact of dark matter galactic halo models on wormhole geometry within f(Q,T) gravity

Nuclear Physics B
This study investigates the possible existence of wormhole solutions with dark matter galactic halo profiles in the background of f(Q,T) gravity. The primary focus of the current study is to find the significance of dark matter (DM) in the search for ...
Moreshwar Tayde, Zinnat Hassan, P.K. Sahoo   +2 more
doaj   +1 more source

DESI Observations of the Andromeda Galaxy: Revealing the Immigration History of Our Nearest Neighbor

The Astrophysical Journal, 2023
We present Dark Energy Spectroscopic Instrument (DESI) observations of the inner halo of M31, which reveal the kinematics of a recent merger—a galactic immigration event—in exquisite detail.
Arjun Dey, Joan R. Najita, Sergey E. Koposov, J. Josephy-Zack, Gabriel Maxemin, Eric F. Bell, C. Poppett, E. Patel, L. Beraldo e Silva, A. Raichoor, D. Schlegel, D. Lang, A. Meisner, Adam D. Myers, J. Aguilar, S. Ahlen, C. Allende Prieto, D. Brooks, A. P. Cooper, K. S. Dawson, A. de la Macorra, P. Doel, A. Font-Ribera, Juan García-Bellido, S. Gontcho A Gontcho, J. Guy, K. Honscheid, R. Kehoe, T. Kisner, A. Kremin, M. Landriau, L. Le Guillou, Michael E. Levi, T. S. Li, Paul Martini, R. Miquel, J. Moustakas, Jundan Nie, N. Palanque-Delabrouille, F. Prada, E. F. Schlafly, Ray M. Sharples, Gregory Tarlé, Yuan-Sen Ting, L. Tyas, M. Valluri, Risa H. Wechsler, H. Zou   +47 more
doaj   +1 more source

Microlensing in Galactic Halos

arXiv: Astrophysics, 2007
10 pages, to appear in the proceedings of the I Italian-Pakistan Workshop on Relativistic Astrophysics, which will be published in the Journal Nuovo ...
openaire   +3 more sources

The Magellanic Stream in Modified Newtonian Dynamics

, 2006
The dynamics of the Magellanic Stream (MS) as a series of clouds extending from the Magellanic Clouds (MCs) to the south Galactic pole is affected by the distribution and the amount of matter in the Milky Way. We calculate the gravitational effect of the
Haghi, Hossein, Hasani-Zonooz, Akram, Rahvar, Sohrab   +2 more
core   +1 more source

Subgrain and Cavity Development during Creep of Al‐3.85%Mg

Advanced Engineering Materials, EarlyView.
Al‐3.85%Mg does form subgrains if crept at very high strains. This fact allows the unification of the creep description in two different alloys such as pure Al and Al–Mg alloys. It is classically considered that the creep mechanisms for type M (e.g., pure Al) and type A alloys (e.g., Al–Mg alloys) are different.
Augusta Isaac, Itziar Serrano‐Munoz, Aleksander Kostka, Martinus Putra Widjaja, Gaspar González‐Doncel, Giovanni Bruno, Ricardo Fernández   +6 more
wiley   +1 more source