Testing tidal-torque theory - I. Spin amplitude and direction
نویسندگان
چکیده
منابع مشابه
Testing Tidal-Torque Theory: I. Spin Amplitude and Direction
We evaluate the success of linear tidal-torque theory (TTT) in predicting galactichalo spin using a cosmological N -body simulation with thousands of well-resolved haloes. The proto-haloes are identified by tracing today’s haloes back to the initial conditions. The TTT predictions for the proto-haloes match, on average, the spin amplitudes of today’s virialized haloes if linear growth is assume...
متن کاملTesting Tidal-Torque Theory: II. Alignment of Inertia and Shear and the Characteristics of Proto-haloes
We investigate the cross-talk between the two key components of tidal-torque theory, the inertia (I) and shear (T ) tensors, using a cosmological N -body simulation with thousands of well-resolved haloes. We find that the principal axes of I and T are strongly aligned, even though I characterizes the proto-halo locally while T is determined by the large-scale structure. Thus, the resultant gala...
متن کاملTidal Friction and Tidal Lagging. Applicability Limitations of a Popular Formula for the Tidal Torque
Tidal torques play a key role in rotational dynamics of celestial bodies. They govern these bodies’ tidal despinning and also participate in the subtle process of entrapment of these bodies into spin–orbit resonances. This makes tidal torques directly relevant to the studies of habitability of planets and their moons. Our work begins with an explanation of how friction and lagging should be bui...
متن کاملSurface spin-transfer torque and spin-injection effective field in ferromagnetic junctions: Unified theory
We consider theoretically a current flowing perpendicular to interfaces of a spin-valve type ferromagnetic metallic junction. For the first time an effective approach is investigated to calculate a simultaneous action of the two current effects, namely, the nonequilibrium longitudinal spin injection and the transversal spin-transfer surface torque. Dispersion relation for fluctuations is derive...
متن کاملSpin-torque building blocks.
The discovery of the spin-torque effect has made magnetic nanodevices realistic candidates for active elements of memory devices and applications. Magnetoresistive effects allow the read-out of increasingly small magnetic bits, and the spin torque provides an efficient tool to manipulate - precisely, rapidly and at low energy cost - the magnetic state, which is in turn the central information m...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 2002
ISSN: 0035-8711,1365-2966
DOI: 10.1046/j.1365-8711.2002.05305.x