Results 21 to 30 of about 559,591 (386)
Milky Way spiral arms from open clusters in Gaia EDR3 [PDF]
Astronomy & Astrophysics, 2021 Context. The physical processes driving the formation of Galactic spiral arms are still under debate. Studies using open clusters favour the description of the Milky Way spiral arms as long-lived structures following the classical density wave theory ...
A. Castro-Ginard +9 more
semanticscholar +1 more source
Strong spiral arms drive secular growth of pseudo bulges in disk galaxies [PDF]
Astronomy & Astrophysics, 2022 Spiral-driven instabilities may drive gas inflow to enhance central star formation in disk galaxies. We investigate this hypothesis using the Sloan Digital Sky Survey (SDSS) in a sample of 2779 nearby unbarred star-forming main-sequence spiral galaxies ...
Sijie Yu +6 more
semanticscholar +1 more source
Distance and extinction to the Milky Way spiral arms along the Galactic centre line of sight [PDF]
Astronomy & Astrophysics, 2021 Context. The position of the Sun inside the disc of the Milky Way significantly hampers the study of the spiral arm structure given the high amount of dust and gas along the line of sight, and the overall structure of this disc has therefore not yet been
F. Nogueras-Lara +2 more
semanticscholar +1 more source
The bar and spiral arms in the Milky Way: structure and kinematics [PDF]
Research in Astronomy and Astrophysics, 2020 The Milky Way is a spiral galaxy with the Schechter characteristic luminosity L*, thus an important anchor point of the Hubble sequence of all spiral galaxies. Yet the true appearance of the Milky Way has remained elusive for centuries.
Juntai Shen, Xing-wu Zheng
semanticscholar +1 more source
Large-scale CO Spiral Arms and Complex Kinematics Associated with the T Tauri Star RU Lup [PDF]
Astrophysical Journal, 2020 While protoplanetary disks often appear to be compact and well organized in millimeter continuum emission, CO spectral line observations are increasingly revealing complex behavior at large distances from the host star.
Jane Huang +11 more
semanticscholar +1 more source
The Spiral Structure in the Solar Neighborhood
Frontiers in Astronomy and Space Sciences, 2021 The spiral structure in the solar neighborhood is an important issue in astronomy. In the past few years, there has been significant progress in observation. The distances for a large number of good spiral tracers, i.e., giant molecular clouds, high-mass
L. G. Hou
doaj +1 more source
GALACTIC SPIRAL ARMS BY SWING AMPLIFICATION [PDF]
The Astrophysical Journal, 2016 ABSTRACT Based on the swing amplification model of Julian & Toomre, we investigate the formation and structure of stellar spirals in disk galaxies. We calculate the pitch angle, wavelengths, and amplification factor of the most amplified mode.
Michikoshi, Shugo, Kokubo, Eiichiro
openaire +2 more sources
The Identification of a Dusty Multiarm Spiral Galaxy at z = 3.06 with JWST and ALMA
The Astrophysical Journal Letters, 2022 Spiral arms serve crucial purposes in star formation and galaxy evolution. In this paper, we report the identification of “A2744-DSG- z 3,” a dusty, multiarm spiral galaxy at z = 3.059 using the James Webb Space Telescope (JWST) NIRISS imaging and grism ...
Yunjing Wu +15 more
doaj +1 more source
An Updated View of the Milky Way from Maser Astrometry
Universe, 2022 Astrometric observations of maser sources in the Milky Way, using the Very Long Baseline Interferometry (VLBI) technique, have been exploited to determine the spiral structure of our Galaxy. Several major spiral arms have now been pinpointed in the first
Katharina Immer, Kazi L. J. Rygl
doaj +1 more source
PITCH ANGLE OF GALACTIC SPIRAL ARMS [PDF]
The Astrophysical Journal, 2014 17 pages, 8 figures, accepted for publication in ...
Michikoshi, Shugo, Kokubo, Eiichiro
openaire +2 more sources