Results 81 to 90 of about 12,684 (325)
Stellar Motion around Spiral Arms: Gaia Mock Data [PDF]
, 2014 We compare the stellar motion around a spiral arm created in two different scenarios, transient/co-rotating spiral arms and density-wave-like spiral arms.
Hunt, JAS +11 more
core +1 more source
The discovery of the spiral arms of the Milky Way [PDF]
Symposium - International Astronomical Union, 1985 Attempts in the 1930s and 1940s to determine the spiral structure of the Milky Way by star counting methods, essentially the continuation of the work of the Kapteyn Astronomical Laboratory, failed to reach this goal. A new foundation for the search was laid by Walter Baade in his studies of stellar populations. With the recognition that highly luminous
openaire +1 more source
The Warp and Spiral Arms of the Milky Way [PDF]
, 2008 This is a pre-published version which is collected from arXiv link.
Levine, E.S. +3 more
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A New Spiral Arm of the Galaxy: The Far 3 kpc Arm [PDF]
The Astrophysical Journal, 2008 We report the detection in CO of the far-side counterpart of the well-known expanding 3-Kpc Arm in the central region of the Galaxy. In a CO longitude-velocity map at b = 0 deg the Far 3-Kpc Arm can be followed over at least 20 deg of Galactic longitude as a faint lane at positive velocities running parallel to the Near Arm.
Dame, T. M., Thaddeus, P.
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Dependence of the Spiral Arms Pitch Angle on Wavelength as a Test of the Density Wave Theory [PDF]
Astrophysical Journal, 2018 Large-scale galactic shocks, predicted by density wave theory, trigger star formation (SF-arms) downstream from the potential of the oldest stars (P-arms), resulting in a color jump from red to blue across spiral arms in the direction of rotation, while ...
Sijie Yu, L. Ho
semanticscholar +1 more source
Somatic mutational landscape in von Hippel–Lindau familial hemangioblastoma
Molecular Oncology, EarlyView.The causes of central nervous system (CNS) hemangioblastoma in Von Hippel–Lindau (vHL) disease are unclear. We used Whole Exome Sequencing (WES) on familial hemangioblastoma to investigate events that underlie tumor development. Our findings suggest that VHL loss creates a permissive environment for tumor formation, while additional alterations ...
Maja Dembic +5 more
wiley +1 more source
Magnetic and gaseous spiral arms in M83
, 2015 Context. The magnetic field configurations in several nearby spiral galaxies contain magnetic arms that are sometimes located between the material arms.
R. Stepanov +6 more
core +1 more source
Star Formation and Magnetic Field Amplification due to Galactic Spirals
The Astrophysical JournalWe use global MHD galaxy simulations to investigate the effects of spiral arms on the evolution of magnetic fields and star formation within a self-regulated interstellar medium.
Hector Robinson +3 more
doaj +1 more source
Stellar dynamics around transient co-rotating spiral arms
EPJ Web of Conferences, 2012 Spiral density wave theory attempts to describe the spiral pattern in spiral galaxies in terms of a long-lived wave structure with a constant pattern speed in order to avoid the winding dilemma.
Cropper M., Grand R.J.J., Kawata D.
doaj +1 more source
Spiral-arm instability: giant clump formation via fragmentation of a galactic spiral arm [PDF]
Monthly Notices of the Royal Astronomical Society, 2017 Fragmentation of a spiral arm is thought to drive the formation of giant clumps in galaxies. Using linear perturbation analysis for self-gravitating spiral arms, we derive an instability parameter and define the conditions for clump formation. We extend our analysis to multi-component systems that consist of gas and stars in an external potential.
Inoue, Shigeki, Yoshida, Naoki
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