Results 41 to 50 of about 33,866 (165)

Environmental effect on the subhalo abundance -- a solution to the missing dwarf problem

, 2008
Recent high-resolution simulations of the formation of dark-matter halos have shown that the distribution of subhalos is scale-free, in the sense that if scaled by the velocity dispersion of the parent halo, the velocity distribution function of galaxy ...
Fukushige, Toshiyuki, Ishiyama, Tomoaki, Makino, Junichiro   +2 more
core   +1 more source

Understanding Dwarf Galaxies in order to Understand Dark Matter

, 2018
Much progress has been made in recent years by the galaxy simulation community in making realistic galaxies, mostly by more accurately capturing the effects of baryons on the structural evolution of dark matter halos at high resolutions.
A. Bastidas Fry, A. Pallottini, Adi Zolotov, Alice Chau, Alyson Brooks, Alyson M. Brooks, Alyson M. Brooks, Anatoly Klypin, Andrea V. Macciò, Andrei Mesinger, Andrew Pontzen, Andrew R. Wetzel, Anne A. Thoul, Annika H. G. Peter, Arianna Di Cintio, Ben Moore, C. B. Brook, C. R. Christensen, C. Trachternach, D. T. F. Weldrake, David N. Spergel, Donnino Anderhalden, Esra Bulbul, F. Governato, Fabio Pacucci, Frank C. van den Bosch, G. Gentile, Gregory A. Dooley, Isabel M. Santos-Santos, J. I. Read, John Kormendy, Jordi Miralda‐Escude, Joshua D. Simon, Julio F. Navarro, Julio F. Navarro, Juntai Shen, Kareem El-Badry, M. Spano, MA Breddels, Mark Vogelsberger, Mark Vogelsberger, Matthew G. Walker, Michael Aumer, Michael Aumer, Naoki Yoshida, Nickolay Y. Gnedin, Oliver D. Elbert, Oscar Agertz, Philip F. Hopkins, Philip F. Hopkins, R. A. Swaters, R. S. de Souza, R. S. de Souza, Rachel Kuzio de Naray, Rennan Barkana, Rennan Barkana, Renée Hlozek, Romain Teyssier, S. M. Benincasa, Se-Heon Oh, Shea Garrison-Kimmel, T. K. Chan, Takashi Okamoto, Till Sawala, V. Springel, Vadim A. Semenov, Vadim A. Semenov, W. J. G. de Blok, W. J. G. de Blok, W. J. G. de Blok   +69 more
core   +1 more source

The dark matter halos of spheroidal galaxies and clusters of galaxies [PDF]

Symposium - International Astronomical Union, 2004
We describe the first results from two observational projects aimed at measuring the amount and spatial distribution of dark matter in distant early-type galaxies (E/S0s) and clusters of galaxies. At the galaxy scale, the Lenses Structure and Dynamics (LSD) Survey is gathering kinematic data for distant (up to z ⋐ 1) E/S0s that are gravitational lenses.
Treu, T., Koopmans, L. V. E., Sand, D. J., Smith, G. P., Ellis, R. S.   +4 more
openaire   +2 more sources

Seedless One‐Pot Synthesis of Colloidal InAs Quantum Dots Enabling a High‐Accuracy Photoplethysmography Oximeter

Advanced Science, EarlyView.
A real‐time, non‐contact photoplethysmography (PPG) system based on InAs colloidal quantum dots (CQDs) synthesized via a seedless injection synthesis is demonstrated. The measured oxygen saturation shows considerable agreement with commercial PPG devices.
Beom Kwan Kim, Seungin Jee, Yongnam Ahn, In‐Suh Lee, Dongeon Kim, Seongchong Park, Yujin Jung, In‐Ho Bae, Se‐Woong Baek   +8 more
wiley   +1 more source

The Influence of Large-Scale Structure on Halo Shapes and Alignments [PDF]

, 2006
Alignments of galaxy clusters (the Binggeli effect), as well as of galaxies themselves have long been studied both observationally and theoretically. Here we test the influence of large-scales structures and tidal fields on the shapes and alignments of ...
Agustsson, Allgood, Bailin, Basilakos, Binggeli, Bond, Chambers, Chambers, Colberg, Colberg, Colless, Croft, Faltenbacher, Flin, Gabriel Altay, Heavens, Hopkins, Jenkins, Jing, Jörg M. Colberg, Kasun, Lee, Lee, Mandelbaum, Maughan, Moore, Navarro, Onuora, Paz, Pimbblet, Plionis, Plionis, Rhee, Rhee, Rupert A. C. Croft, Seljak, Spergel, Splinter, Springel, Struble, Tanaka, Ulmer, Van Haarlem, Warren, West, West, York   +46 more
core   +2 more sources

Feasibility Study for Application of Digitized Henize Mt. Wilson Michigan Southern Sky Hα$$ \boldsymbol{\alpha} $$ Survey Low‐Dispersive Spectral Plates for Searches for Anomalous and Highly Redshifted Objects

Astronomische Nachrichten, EarlyView.
ABSTRACT The goal of this study is to confirm the feasibility of the use of digitized low dispersive MtWilson Michigan Southern Sky Hα$$ \alpha $$ survey astronomical photographic plates for modern astrophysical research. The detection of highly redshifted objects, such as early galaxies and quasars, is fundamental to understanding the universe's ...
Tauseef Ahmad Zafar, René Hudec, Marta Mara Merono Vidagany, Fehmi Mejri   +3 more
wiley   +1 more source

Self-similar Decomposition of the Hierarchical Merger Tree of Dark Matter Halos

The Astrophysical Journal
In the ΛCDM universe, structure formation is generally not a self-similar process, while some self-similarity remains in certain statistics, which can greatly simplify our description and understanding of the cosmic structures. In this work, we show that
Wenkang Jiang, Jiaxin Han, Fuyu Dong, Feihong He   +3 more
doaj   +1 more source

Dissipative dark matter and the rotation curves of dwarf galaxies

, 2016
There is ample evidence from rotation curves that dark matter halos around disk galaxies have nontrivial dynamics. Of particular significance are: a) the cored dark matter profile of disk galaxies, b) correlations of the shape of rotation curves with ...
Foot, R.
core   +1 more source

Red Halos of Galaxies – Reservoirs of Baryonic Dark Matter? [PDF]

Proceedings of the International Astronomical Union, 2007
AbstractDeep optical/near-IR surface photometry of galaxies outside the Local Group have revealed faint and very red halos around objects as diverse as disk galaxies and starbursting dwarf galaxies. The colours of these structures are too extreme to be reconciled with stellar populations similar to those seen in the stellar halos of the Milky Way or ...
Zackrisson, E., Bergvall, N., Flynn, C., Ostlin, G., Micheva, G., Caldwell, B.   +5 more
openaire   +2 more sources

Ginseng polysaccharides prevent mastitis through Lactobacillus murinus‐derived deoxycholic acid and TGR5 signaling

iMetaOmics, EarlyView.
Prebiotic Ginseng polysaccharides (GP) alleviate mastitis through selective enrichment of gut L. murinus, which elevates its anti‐inflammatory metabolite deoxycholic acid (DCA). Circulating DCA engages mammary epithelial TGR5 receptors, triggering the cAMP–PKA pathway to suppress NF‐κB/NLRP3‐mediated inflammation.
Zhijie Zheng, Huiying Liu, Sizhe Chen, Jianhui Gu, Sisi Cai, Xiang Liu, Raphaela I. Lau, Yao Zhang, Sunjae Lee, Xiaoyan Wang, Kewei Fan, Xiaole Yin, Hein Min Tun, Renyou Gan, Haichong Wu, Qi Su   +15 more
wiley   +1 more source