Results 51 to 60 of about 73,052 (295)

Revisiting perfect fluid dark matter: Observational constraints from our galaxy

Physics Letters B, 2016
We revisit certain features of an assumed spherically symmetric perfect fluid dark matter halo in the light of the observed data of our galaxy, the Milky Way (MW). The idea is to apply the Faber–Visser approach of combined observations of rotation curves
Alexander A. Potapov, Guzel M. Garipova, Kamal K. Nandi   +2 more
doaj   +1 more source

Interstellar titanium in the galactic halo [PDF]

The Astrophysical Journal, 1995
We present observations of Ti~II~$ 3384$ absorption towards 15 distant stars in the Galactic halo and the Magellanic Clouds. These new data extend existing surveys of the distribution of Ti$^+$ to larger distances from the plane of the Galaxy than sampled previously, allowing the scale height of titanium to be determined for the first time.
Lipman, Keith, Pettini, Max
openaire   +2 more sources

Infrared Nanocrystals for Space Application: Hardness to Irradiations

Advanced Functional Materials, EarlyView.
This article investigates infrared HgTe nanocrystals under X‐ray and ion irradiation, revealing remarkable radiation hardness. It uncovers distinct degradation mechanisms and shows that the nanomaterial outperforms integrated electronics. The results position colloidal nanocrystals as promising candidates for resilient space and harsh‐environment ...
Alexandre Neyret, Dario Mastrippolito, Bingbing Xia, Adrien Khalili, Maxime Lebreton, Giorgia Strobbia, Albin Colle, Marco Paye, Mariarosa Cavallo, Erwan Bossavit, Claire Abadie, Yoann Prado, Debora Pierucci, Victor Parahyba, Francois Coursaget, David Darson, Emrick Briand, Ian Vickridge, Stephane Demiguel, Sebastien Massenot, Jean‐Marc Belloir, Vincent Goiffon, Emmanuel Lhuillier   +22 more
wiley   +1 more source

On the fraction of dark matter in charged massive particles (CHAMPs)

, 2010
From various cosmological, astrophysical and terrestrial requirements, we derive conservative upper bounds on the present-day fraction of the mass of the Galactic dark matter (DM) halo in charged massive particles (CHAMPs).
, , C. Heiles, D.G. Cerdeño, E Martínez-Gómez, F.J Sánchez-Salcedo, F.J. Sánchez-Salcedo, G. Schmidt, G.K. Parks, J Magaña, J.L. Feng, J.L. Han, J.W. King, L. Chuzhoy, L. Spitzer Jr., L. Spitzer Jr., M. Fellhauer ., M. Markevitch ., M. Taoso, O. Gerhard, P. Natarajan, P.M.W. Kalberla, R. Beck, R. Cen, R.J. Rand, S. Davidson, S. De Lope Amigo, S.L. Dubovsky, V. Belokurov ., W.R. Webber   +29 more
core   +1 more source

Exploring the magnetic field structure of the Milky Way with pulsars in the SKA era

The Open Journal of Astrophysics
The magnetic field structure of the Milky Way can offer critical insights into the origin of galactic magnetic fields. Measurements of magnetic structures of the Milky Way are still sparse in far regions of the Galactic disk and halo.
Jun Xu, JinLin Han, Weicong Jing, SKA Pulsar Science Working Group   +3 more
doaj   +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

Milli-magnetic monopole dark matter and the survival of galactic magnetic fields

Journal of High Energy Physics, 2022
Dark sectors with Abelian gauge symmetries can interact with ordinary matter via kinetic mixing. In such scenarios, magnetic monopoles of a broken dark U(1) will appear in our sector as confined milli-magnetically charged objects under ordinary ...
Michael L. Graesser, Ian M. Shoemaker, Natalia Tapia Arellano   +2 more
doaj   +1 more source

Is the galactic halo baryonic?

, 1995
Recent observations of microlensing events in the Large Magellanic Cloud suggest that a sizeable fraction of the galactic halo is in form of MACHOs with mass less than abou 0.1 M_{\odot}. Here we argue that molecular clouds (mainly H_2) located in the galactic halo can contribute substantially to its total mass.
DE PAOLIS, Francesco, INGROSSO, Gabriele, P. Jetzer, M. Roncadelli   +3 more
openaire   +3 more sources

Galactic Stellar Haloes in the CDM Model [PDF]

AIP Conference Proceedings, 2010
We present six simulations of galactic stellar haloes formed by the tidal disruption of accreted dwarf galaxies in a fully cosmological setting. Our model is based on the Aquarius project, a suite of high resolution N-body simulations of individual dark matter haloes.
A. P. Cooper, S. Cole, C. S. Frenk, S. D. M. White, G. De Lucia, A. Helmi, A. J. Benson, J. Helly, A. Jenkins, J. Navarro, V. Springel, J. Wang, Victor P. Debattista, C. C. Popescu   +13 more
openaire   +7 more sources

Harnessing the Orientation of Columnar Discotic Liquid Crystals for Narrowband Blue Emission with Enhanced Out‐Coupling Efficiency Toward Improvement of SP‐OLEDs Performance

Advanced Functional Materials, EarlyView.
Solution‐processed OLEDs containing discotic liquid‐crystalline MR‐TADF emitters are reported. Supramolecular self‐assembly induces homeotropic columnar alignment, enforcing preferential horizontal orientation of the emitter transition dipole moment in spin‐coated films, which leads to an enhancement in the device light outcoupling efficiency while ...
Joydip De, Abhishek Kumar Gupta, Džiugas Litvinas, Francisco Tenopala‐Carmona, Matthias Lehmann, Malte C. Gather, Eli Zysman‐Colman   +6 more
wiley   +1 more source