Results 41 to 50 of about 559,591 (386)
The shapes of spiral arms in the S4G survey and their connection with stellar bars [PDF]
Astronomy & Astrophysics, 2019 Context. Spiral galaxies are very common in the local Universe, but their formation, evolution, and interplay with bars remain poorly understood after more than a century of astronomical research on the topic. Aims. We use a sample of 391 nearby galaxies
S. D'iaz-Garc'ia +3 more
semanticscholar +1 more source
The dynamics of long-lived spiral arms
EPJ Web of Conferences, 2012 It has been believed that spiral arms in pure stellar disks decay in several galactic rotations due to the heating by the spiral arms. However, it might be caused by a numerical heating.
Wada K. +5 more
doaj +1 more source
Thermal Infrared Imaging of MWC 758 with the Large Binocular Telescope: Planetary-driven Spiral Arms? [PDF]
Astrophysical Journal, 2019 Theoretical studies suggest that a giant planet around the young star MWC 758 could be responsible for driving the spiral features in its circumstellar disk.
K. Wagner +7 more
semanticscholar +1 more source
CHARACTERIZING SPIRAL ARM AND INTERARM STAR FORMATION [PDF]
The Astrophysical Journal, 2016 ABSTRACT Interarm star formation contributes significantly to a galaxy’s star formation budget and provides an opportunity to study stellar birthplaces unperturbed by spiral arm dynamics. Using optical integral field spectroscopy of the nearby galaxy NGC 628 with VLT/MUSE, we construct Hα maps including detailed corrections for dust ...
Kreckel, K. +6 more
openaire +5 more sources
Galaxies decomposition with spiral arms -- II: A multiwavelength case study of M 51 [PDF]
Spiral structure can contribute significantly to a galaxy's luminosity. However, only rarely are proper photometric models of spiral arms used in decompositions.
A. A. Marchuk +9 more
semanticscholar +1 more source
The Imprint of Spiral Arms on the Galactic Rotation Curve [PDF]
Astrophysical Journal, 2019 We discuss a model for the Milky Way obtained by fitting the observed terminal velocities with the radial acceleration relation. The resulting stellar surface density profile departs from a smooth exponential disk, having bumps and wiggles that ...
S. McGaugh
semanticscholar +1 more source
Measuring Spiral Arm Torques: Results for M100 [PDF]
The Astronomical Journal, 1995 Uuencoded compressed PostScript (300k) - 26 pages, figs. 3-9; submitted to AJ. Full PostScript version (with all figures) is available through anonymous ftp at ftp://astro.princeton.edu/ognedin/Torque/paper.ps or ftp://astro.princeton.edu/library/preprints/pop613.ps.Z or through WWW http://www.astro.princeton.edu/~library/prep ...
GNEDIN, OY, GOODMAN, J, FREI, Z
openaire +3 more sources
Hic sunt dracones: Cartography of the Milky Way spiral arms and bar resonances with Gaia Data Release 2 [PDF]
Astronomy & Astrophysics, 2019 In this paper we introduce a new method for analysing Milky Way phase-space which allows us to reveal the imprint left by the Milky Way bar and spiral arms on the stars with full phase-space data in Gaia Data Release 2.
S. Khoperskov +7 more
semanticscholar +1 more source
Super Multi-Armed and Segmented Spiral Pattern in a Reaction-Diffusion Model
IEEE Access, 2019 The super multi-armed and segmented (SMAS) spiral pattern has been observed in nature, such as sunflower inflorescence, spiral aloe, pine cone, ball cactus and Roman broccoli, which is characterized by several segmented spiral arms sharing the same ...
Jian Gao, Changgui Gu
doaj +1 more source
Gas Dynamics in the Milky Way: Second Pattern Speed and Large-Scale Morphology [PDF]
, 2002 We present new gas flow models for the Milky Way inside the solar circle. To this end we use SPH simulations in gravitational potentials determined from the NIR luminosity distribution (including spiral arms) which are based on the COBE/DIRBE maps.
Bissantz, Nicolai +2 more
core +3 more sources