spiral arms
Tracing the spiral arms in IP Pegasi
... the spiral pattern is hampered by the azimuthal smearing effect, which is responsible for the “but- terfly” shape of the reconstructed spiral arms (Harlaftis et ...
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Scattered light images of spiral arms in marginally gravitationally unstable discs with an embedded planet
... wide-open spiral arms in addition to their characteristic low-opacity inner gap ...of spiral arms induced by planet–disc ...open spiral arms in the outer ...
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Are Elias 2-27's Spiral Arms Driven by Self-gravity, or by a Companion? A Comparative Spiral Morphology Study
... logarithmic spiral arms of constant pitch f∼ 12 ° ; these are consistent with expectations from density wave theory ( Lin & Shu 1964; Bertin & Lin 1996 ) , which are appropriate as for this case ...
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Are Elias 2 27's spiral arms driven by self gravity, or by a companion? A comparative spiral morphology study
... The spiral waves detected in the protostellar disc surrounding Elias 2-27 have been suggested as evidence of the disc being gravitationally ...the spiral morphology of smoothed particle hydrodynamic ...
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A Synthesis of Fundamental Parameters of Spiral Arms, Based on Recent Observations in the Milky Way
... the spiral structure of the Milky Way ...of spiral arms, thus making a version that better fit their own data—here one talk of “model ...model arms pass through small regions devoid of ...
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Spiral Arms in the Asymmetrically Illuminated Disk of MWC 758 and Constraints on Giant Planets
... the spiral arms, between ...the arms coincide with the brightest 12 μm signal from the MWC 758 disk (Mari˜nas et ...the spiral arms are density features, and not merely distortions of ...
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ALMA reveals potential evidence for spiral arms, bars, and rings in high redshift submillimeter galaxies
... While spiral arms are generally thought to emerge in galaxies only at redshifts of z ...of spiral galaxies have been claimed at higher redshift (a three-armed spiral at z = ...one-armed ...
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Do Near Solar System Supernovae Enhance Volcanic Activities on Earth and Neighbouring Planets on Their Paths through the Spiral Arms of the Milky Way, and What Might Be the Consequences for Estimations of Earth’s History and Predictions for Its Future?
... the spiral arms, the preferred birth and death place for stars in the Milky Way, are one main source of neutrinos, which carry about 98% of the emitted, released gravi- tational ...its spiral arm!) ...
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Spiral arms in the proto-planetary disc HD100453 detected with ALMA: evidence for binary-disc interaction and a vertical temperature gradient
... spirals arms in the disc (Cossins et ...ral arms (Pohl et ...the spiral morphology by self-gravity, this is nevertheless a possibility that cannot be ...for spiral arms, such as for ...
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Circumbinary, not transitional: on the spiral arms, cavity, shadows, fast radial flows, streamers, and horseshoe in the HD 142527 disc
... observe dust grains collecting into azimuthally distinct structures, trapped by the pressure bumps at the locations where spiral arms in the gas cross the dust ring. Although these grains are nominally ...
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Are Elias 2 27's spiral arms driven by self gravity, or by a companion? A comparative spiral morphology study
... comparative spiral morphology study on massive protostellar disk simulations tuned to reproduce the observed spiral structure in the protostellar disk Elias 2-27 ( Pérez et ...individual spiral ...
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Galaxy Zoo: constraining the origin of spiral arms
... istic spiral arms, with two-arm modes quickly leading to the growth of a bar (Miller et ...the spiral structure in ...of spiral structure is that spiral arm patterns may exist as ...
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Photon dominated regions in the spiral arms of M 83 and M 51
... spiral arm positions lie at galacto-centric distances of between 2 kpc and 6 kpc. This data is complemented with maps of CO 1–0, 2–1, and 3–2, and ISO / LWS far-infrared data of [C ] (158 µ m), [O ] (63 µ m), ...
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The MUSE Atlas of Disks (MAD): resolving star formation rates and gas metallicities on < 100 pc scales
... DIG, spiral arms, bars, non-gravitational (inflow/outflow) com- ponents, galactic rings, and other small-scale substructure which stands out in the 2D ...the spiral arms in NGC 289 and NGC ...
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Stellar kinematical signatures of disc non-axisymmetries in the extended solar neighbourhood
... no spiral arms [18] has shown that this effect of increasing |C| with velocity dispersion could be qualitatively reproduced if the Sun is located outside the outer 2 : 1 resonance of the bar with the right ...
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Equiangular Spiral Slot Antenna for C band Applications
... The Spiral Slot antennas have gained a lot of attention in the last few years due to their characteristics like stable impedance, axial ratio, gain and pattern over wideband [1] and their conformal ...the ...
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The formation of molecular clouds in spiral galaxies
... The analysis of Chapter 3 shows that spiral shocks can induce a velocity dispersion size-scale dependence in the ISM. The form of the velocity dispersion relation is interpreted in terms of mass loading, i.e. the ...
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A Spiral Antenna with Integrated Parallel-Plane Feeding Structure
... the spiral arms and feeding structure. So in this paper the two arms of the spiral antenna are printed on different sides of the substrate for planar ...The spiral antenna uses one arm ...
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Mechanisms based on chaotic flows that support structures in barred-spiral systems
... the spirals was less than /2. The velocity dispersion in the initial conditions of the response models plays a role as regards the azimuthal extent of the chaotic spirals. Colder initial conditions favor larger azimuthal ...
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Wideband and Multifrequency Square Spiral Microstrip Patch Antenna
... The time when no path is available to transmit the packet is considered as the network lifetime. In the present paper area of the patch is kept same as that of square patch but the total metal of the patch is reduced by ...
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