Results 71 to 80 of about 184,560 (234)
The Astrophysical Journal, 2023 We present a detailed analysis of the structure of the Local Group flocculent spiral galaxy M33, as measured using the Panchromatic Hubble Andromeda Treasury Triangulum Extended Region (PHATTER) survey. Leveraging the multiwavelength coverage of PHATTER,
Adam Smercina +16 more
doaj +1 more source
The shapes of spiral arms in the S$^4$G survey and their connection with stellar bars [PDF]
A&A 631, A94 (2019), 2019 Spiral galaxies are common in the local Universe, but their formation, evolution, and interplay with bars remain poorly understood. We use a sample of 391 nearby galaxies from the S$^4$G survey to characterise the winding angle and amplitude of spiral arms as a function of disc properties, such as bar strength, in all kinds of spirals (grand-design ...
arxiv +1 more source
Dense Molecular Gas Associated with the Circumnuclear Star-forming Ring in the Barred Spiral Galaxy NGC 6951 [PDF]
, 1998 We present high-resolution (3''-5'') observations of CO (1-0) and HCN (1-0) emission from the circumnuclear star-forming ring in the barred spiral galaxy NGC 6951, a host of a type 2 Seyfert nucleus, using the Nobeyama Millimeter Array and the Nobeyama ...
K. Kohno, R. Kawabe, B. Vila-Vilaro
semanticscholar +1 more source
Diffusion in barred-spiral galaxies
, 2010 We characterize the radial migration of stars in the disk plane by calculating the diffusion coefficient and the diffusion time-scale for a bulge-disk N-body self-consistent system with a marginally-stable Toomre-Q parameter. We find that diffusion is not constant in time, but follows the evolution of the bar, and becomes maximum near the corotation ...
Brunetti, Maura +2 more
openaire +3 more sources
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
Gravitational bar and spiral arm torques from K_s-band observations and implications for the pattern speeds [PDF]
, 2004 We have obtained deep near-infrared K_s-band William Herschel Telescope observations of a sample of 15 nearby spiral galaxies having a range of Hubble types and apparent bar strengths. The near-infrared light distributions are converted into gravitational potentials, and the maximum relative gravitational torques due to the bars and the spirals are ...
arxiv +1 more source
Multiple pattern speeds and the manifold spirals in a simulation of a barred spiral galaxy
Monthly notices of the Royal Astronomical SocietyObservations of real galaxies as well as N-body simulations often indicate the presence of multiple pattern speeds in the disc of a barred spiral galaxy.
K. Zouloumi +2 more
semanticscholar +1 more source
ASTE CO (3-2) Observations of the Barred Spiral Galaxy M 83: I. Correlation between CO (3-2)/ CO (1-0) Ratios and Star Formation Efficiencies [PDF]
, 2007 We present CO (J = 3–2) emission observations with the ASTE toward the 50 50 (or 6.6 kpc 6.6 kpc at the distance D = 4.5 Mpc) region of the nearby barred spiral galaxy M 83.
K. Muraoka +16 more
semanticscholar +1 more source
Spirals and Rings in Barred Galaxies by the ROTASE Model
International Journal of Physics, 2021 This paper extends the application of the ROTASE model for the formation of spiral arms of disc galaxies, questions and confusions from readers about this model are addressed. The optical trail effect behind the spiral arm rotation is the natural consequence of the model.
openaire +4 more sources
The Astrophysical Journal, 2023 We present Atacama Large Millimeter/submillimeter Array (ALMA) imaging of molecular gas across the full star-forming disk of the barred spiral galaxy M83 in CO( J = 1–0).
Jin Koda +25 more
doaj +1 more source