Results 61 to 70 of about 117,029 (345)

The Dark Matter Distribution in Disk Galaxies [PDF]

, 2000
We use high-quality optical rotation curves of 9 low-luminosity disk galaxies to obtain the velocity profile of the surrounding dark matter halos. We find that they increase linearly with radius at least out to the stellar disk edge, implying that, over ...
Borriello, A., Salucci, P.
core   +2 more sources

Time after time – circadian clocks through the lens of oscillator theory

FEBS Letters, EarlyView.
Oscillator theory bridges physics and circadian biology. Damped oscillators require external drivers, while limit cycles emerge from delayed feedback and nonlinearities. Coupling enables tissue‐level coherence, and entrainment aligns internal clocks with environmental cues.
Marta del Olmo, Carolin Ector, Hanspeter Herzel   +2 more
wiley   +1 more source

Study of wormhole stability in the framework of black hole surrounded by the pseudo-isothermal dark matter halo

European Physical Journal C: Particles and Fields
This work is devoted to exploring the formation and stability of thin-shell wormholes developed through the two similar copies of black holes bounded by the pseudo-isothermal dark matter halo. It is found that the horizon radius of a black hole decreases
Faisal Javed, Arfa Waseem, Ghulam Fatima, Bander Almutairi   +3 more
doaj   +1 more source

Dark Matter Subhalos in the Ursa Minor Dwarf Galaxy

, 2012
Through numerical simulations, we study the dissolution timescale of the Ursa Minor cold stellar clump, due to the combination of phase-mixing and gravitational encounters with compact dark substructures in the halo of Ursa Minor.
A. Just, Agnello, Avila-Reese, Battaglia, Binney, Bovill, Carlberg, Carlberg, Carrera, Cen, Chen, de Blok, Dehnen, E. K. Grebel, El-Zant, F. J. Sánchez-Salcedo, Gilmore, Goerdt, Grebel, Green, Jardel, Johnston, Kannan, Kleyna, Kleyna, Klypin, Lora, Macciò, Moore, Odenkirchen, Palma, Peñarrubia, Peñarrubia, Rocha, Romano-Díaz, Romano-Díaz, Somerville, Strigari, Sánchez-Salcedo, Sánchez-Salcedo, Totani, V. Lora, Walker, Walker, Widrow, Wilkinson, Yoon, Young, Young   +48 more
core   +1 more source

Dwarf Dark Matter Halos

The Astrophysical Journal, 2004
We study properties of dark matter halos at high redshifts z=2-10 for a vast range of masses with the emphasis on dwarf halos with masses 10^7-10^9 Msun/h. We find that the density profiles of relaxed dwarf halos are well fitted by the NFW profile and do not have cores. We compute the halo mass function and the halo spin parameter distribution and find
Colin, P., Klypin, A., Valenzuela, O., Gottlober, S.   +3 more
openaire   +2 more sources

Unbound particles in dark matter halos [PDF]

Journal of Cosmology and Astroparticle Physics, 2013
We investigate unbound dark matter particles in halos by tracing particle trajectories in a simulation run to the far future (a = 100). We find that the traditional sum of kinetic and potential energies is a very poor predictor of which dark matter particles will eventually become unbound from halos. We also study the mass fraction of unbound particles,
Behroozi, Peter S., Loeb, Abraham, Wechsler, Risa H.   +2 more
openaire   +2 more sources

Conserved structural motifs in PAS, LOV, and CRY proteins regulate circadian rhythms and are therapeutic targets

FEBS Letters, EarlyView.
Cryptochrome and PAS/LOV proteins play intricate roles in circadian clocks where they act as both sensors and mediators of protein–protein interactions. Their ubiquitous presence in signaling networks has positioned them as targets for small‐molecule therapeutics. This review provides a structural introduction to these protein families.
Eric D. Brinckman, Anna E. Lester, Brian D. Zoltowski   +2 more
wiley   +1 more source

Axion dark matter searches from the standard halo over the tidal stream to the big flow

Journal of High Energy Physics
The sensitivity of axion dark matter searches depends on the signal window that results from the velocity dispersion of axion dark matter. Since the ratio of signal windows is about 6500 between the standard halo and the big flow axion dark matter, each ...
Andrew K. Yi, Byeong Rok Ko
doaj   +1 more source

Estimate of halo ellipticity as a function of radius with flexions [PDF]

, 2000
The cold dark matter theory predicts triaxial dark matter haloes. The radial distribution of halo ellipticity depends on baryonic processes and the nature of dark matter particles (collisionless or collisional).
De Vries, N.K., Feringa, B.L., Hulst, R, Kooijman, H., Smeets, W.J.J., Spek, A.L., Visser, J.M., Zijlstra, R.W J   +7 more
core   +5 more sources

Dark Matter Substructure within Galactic Halos [PDF]

The Astrophysical Journal, 1999
We use numerical simulations to examine the substructure within galactic and cluster mass halos that form within a hierarchical universe. Clusters are easily reproduced with a steep mass spectrum of thousands of substructure clumps that closely matches observations.
Moore, Ben, Ghigna, Sebastiano, Governato, Fabio, Lake, George, Quinn, Tom, Stadel, Joachim, Tozzi, Paolo   +6 more
openaire   +2 more sources