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The Efficiency of Grain Alignment in Dense Interstellar Clouds: a Reassessment of Constraints from Near-Infrared Polarization
We present the results of a detailed study of interstellar polarization efficiency (as measured by the ratio -->pλ/τλ) toward molecular clouds, with the aim of discriminating between grain alignmentExpand
Radiative torques: analytical model and basic properties
We attempt to get a physical insight into grain alignment processes by studying basic properties of radiative torques (RATs). For this purpose we consider a simple toy model of a helical grain thatExpand
Properties and alignment of interstellar dust grains toward Type Ia Supernovae with anomalous polarization curves
Recent photometric and polarimetric observations of type Ia supernovae (SNe Ia) show unusually low total-to-selective extinction ratio ($R_{V}<2$) and wavelength of maximum polarizationExpand
GRAIN ALIGNMENT INDUCED BY RADIATIVE TORQUES: EFFECTS OF INTERNAL RELAXATION OF ENERGY AND COMPLEX RADIATION FIELD
Earlier studies of grain alignment dealt mostly with interstellar grains that have strong internal relaxation of energy which aligns the grain axis of maximum moment of inertia (the axis of majorExpand
Subsonic mechanical alignment of irregular grains
We show that grains can be efficiently aligned by interacting with a subsonic gaseous flow. The alignment arises from grains having irregularities that scatter atoms with different efficiency in theExpand
The interaction of relativistic spacecrafts with the interstellar medium
The Breakthrough Starshot initiative aims to launch a gram-scale spacecraft to a speed of $v\sim 0.2$c, capable of reaching the nearest star system, $\alpha$ Centauri, in about 20 years. However, aExpand
Grain alignment by radiative torques in special conditions and implications
Grain alignment by radiative torques (RATs) has been extensively studied for various environment conditions, including interstellar medium, dense molecular clouds, and accretion disks, thanks toExpand
On origin and destruction of relativistic dust and its implication for ultrahigh energy cosmic rays
Dust grains may be accelerated to relativistic speeds by radiation pressure, diffusive shocks, and other acceleration mechanisms. Such relativistic grains have been suggested as primary particles ofExpand
EVIDENCE FOR H2 FORMATION DRIVEN DUST GRAIN ALIGNMENT IN IC 63
In the interstellar medium (ISM), molecular hydrogen is expected to form almost exclusively on the surfaces of dust grains. Due to that molecule's large formation energy (–4.5 eV), several dynamicalExpand
A unified model of grain alignment: radiative alignment of interstellar grains with magnetic inclusions
The radiative torque (RAT) alignment of interstellar grains with ordinary paramagnetic susceptibilities has been supported by earlier studies. The alignment of such grains depends on the so-calledExpand
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