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Astronomical Journal, ISSN 0004-6256, 03/2016, Volume 151, Issue 3, p. 55
Here, we fitted a four-arm spiral model to the more accurate data on global arm pitch angle and arm longitude tangents to get the start of each spiral arm near the galactic nucleus... 
methods: statistical | Galaxy: disk | ISM: general | Galaxy: structure | galaxies: spiral | ISM: structure | Origins | Galactic structure | Tangents | Spirals | Galaxies | Pitch angle | Longitude | Tracers
Journal Article
Astrophysical journal. Letters, ISSN 2041-8213, 2012, Volume 748, Issue 2, pp. L22 - 7
Journal Article
Monthly Notices of the Royal Astronomical Society, ISSN 0035-8711, 11/2012, Volume 426, Issue 3, pp. 2089 - 2106
Journal Article
Astrophysical Journal, ISSN 0004-637X, 02/2016, Volume 817, Issue 2, p. 109
Journal Article
Astrophysical Journal, ISSN 0004-637X, 03/2013, Volume 766, Issue 1, pp. 34 - 14
Journal Article
Astrophysical Journal, ISSN 0004-637X, 09/2016, Volume 829, Issue 1, p. 13
We present results from a suite of three-dimensional global hydrodynamic simulations that shows that spiral density waves propagating in circumstellar disks are unstable to the growth of a parametric... 
waves | hydrodynamics | accretion, accretion disks | instabilities | DIFFERENTIALLY ROTATING-DISKS | DENSITY WAVES | PROTOSTELLAR DISKS | PROTOPLANETARY DISKS | VERTICAL-SHEAR INSTABILITY | NONLINEAR EVOLUTION | FREE ECCENTRICITY | accretion | ASTRONOMY & ASTROPHYSICS | ASTROPHYSICAL DISCS | accretion disks | HYDRODYNAMIC INSTABILITY | LOCAL INSTABILITY | Viscosity | Turbulent flow | Growth rate | Gravitational waves | Protoplanetary disk | Accretion disks | Wave propagation | Planet formation | Solar system | Kinematic viscosity | Gravity waves | Turbulence | Accretion | Momentum transport | Computer simulation | Computational fluid dynamics | Resonant interactions | Vertical mixing | Angular momentum transport | Binary systems | Stability analysis | Flow stability | Adiabatic equations | Embedded systems | Jupiter | Equations of state | Protoplanets | Angular momentum | Instability | Physics - Earth and Planetary Astrophysics | VELOCITY | DISTURBANCES | HYDRODYNAMIC MODEL | JUPITER PLANET | PROTOPLANETS | VISCOSITY | SIMULATION | THREE-DIMENSIONAL CALCULATIONS | ACCRETION DISKS | DENSITY | ANGULAR MOMENTUM | ASTROPHYSICS, COSMOLOGY AND ASTRONOMY | ASTROPHYSICS | PERTURBATION THEORY | GRAVITATION | GRAVITY WAVES | EQUATIONS OF STATE | TURBULENCE | SPECTRA | SOLAR SYSTEM | PARAMETRIC INSTABILITIES
Journal Article
Monthly notices of the Royal Astronomical Society, ISSN 0035-8711, 10/2019, Volume 489, Issue 1, pp. 116 - 131
We argue that self-excited instabilities are the cause of spiral patterns in simulations of unperturbed stellar discs... 
DENSITY WAVES | DISC GALAXIES | VELOCITY | galaxies: evolution | DYNAMICAL EVOLUTION | ARMS | instabilities | galaxies: structure | MODES | PHASE | ASTRONOMY & ASTROPHYSICS | STARS | galaxies: kinematics and dynamics | galaxies: spiral
Journal Article
Science (American Association for the Advancement of Science), ISSN 1095-9203, 2016, Volume 353, Issue 6307, pp. 1519 - 1521
Gravitational forces are expected to excite spiral density waves in protoplanetary disks, disks of gas and dust orbiting young stars... 
EVOLUTION | SIGNATURES | IMAGES | MULTIDISCIPLINARY SCIENCES | MASS | ARMS | ACCRETION | OPHIUCHUS | GRAVITATING CIRCUMSTELLAR DISCS | EMISSION | Analysis | Planetary nebulae | Gravity | Protoplanetary disks | Star & galaxy formation | Gravitational waves | Protostars | Spirals | Protoplanets | Planet formation | Stars | Planetary probes | Arrays | Accretion disks | Density
Journal Article