Spiral Arm

Spiral Arm

 

a structural formation characteristic of spiral galaxies.

References in periodicals archive ?
This indicates that Cepheids located there must have formed around the same time in one of the spiral arms. However, Cepheids that were formed in a spiral arm do not currently follow the exact location of that arm, because rotation velocities of spiral arms and stars are slightly different,' explains Dr.
Off the southwestern end of the central bar there's a short and bright spiral arm that arcs north to south and is studded with three H II regions: EKS 033, 037, and 038.
Reasonable matching is achieved throughout the band by keeping the microstrip width of the spiral arm (W) and spacing between spiral arms (S) almost equal, as shown in Figure 1.
3, in which [r.sub.s] = 50 mm and [h.sub.s] = 1mm are, respectively, the radius and thickness of the substrate; [r.sub.g] = 12 mm is the radius of the ground; [w.sub.s] = 2 mm denotes the width of spacing; and [w.sub.m] = 2 mm stands for the width of the spiral arm. The proposed SASA is composed by the metal spiral arm, a small ground, a dielectric substrate, and the SMA connector.
The technique, which is called 'trigonometric parallax', was then applied to measure the distance between Earth and a star in the Scutum-Centaurus spiral arm - a length of about 66,000 light-years.
Rather than being stuck in a backwater galactic community, our solar system sits along a major spiral arm of the Milky Way, researchers say September 28 in Science Advances.
The Sun is located in the Orion spiral arm, about 30,000 light years from the galactic centre.
They identified the pattern of stars towards the center of the photo as our galaxy's Milky Way, while the dark patches are the dense dust clouds in an inner spiral arm of our galaxy.
Mel Hughes, prosecuting, said the infant suffered a spiral arm fracture during an incident on November 3, 2014.
Since the luminosities of these stars are well known, the newly discovered ones could be shown to lie at a distance appropriate to an outer spiral arm. However, they lie somewhat above the Galactic Plane, leading to the conclusion that the arm must be a warped one.
Scientists captured images just 11 hours after the explosion in an outer spiral arm of the Pinwheel Galaxy, in the Great Bear constellation.