Results 31 to 40 of about 7,580 (161)

Spiral arm amplitude variations and pattern speeds in the grand design galaxies M51, M81, and M100

The Astrophysical Journal, 1989
In the modal theory of galactic spiral structure, the amplitude of a prominent two-arm spiral pattern should oscillate slightly with galactocentric distance because of an interference between the outward and inward propagating waves. In the stellar dynamical theory, the spiral arm amplitudes should oscillate because of differential crowding near and ...
Bruce G. Elmegreen, P. E. Seiden, D. M. Elmegreen   +2 more
openalex   +3 more sources

Synthetic HI observations of a simulated spiral galaxy [PDF]

, 2010
Using the Torus radiative transfer code we produce synthetic observations of the 21 cm neutral hydrogen line from an SPH simulation of a spiral galaxy. The SPH representation of the galaxy is mapped onto an AMR grid, and a ray tracing method is used to ...
Acreman, Adler, Baba, Bergin, Braun, Chakrabarti, Chemin, Corbelli, Cox, De Avillez, Dib, Dib, Dobbs, Dobbs, Dobbs, Dobbs, Dobbs, Douglas, Douglas, Efremov, Engargiola, Gibson, Glover, Gómez, Harries, Heiles, Heyer, Kim, Lucy, Narayanan, Pinte, Price, Putman, Rhode, Roberts, Rohlfs, Rosolowsky, Rots, Rundle, Shetty, Stil, Tamburro, Tasker, Taylor, Visser, Wada, Wada, Wada, Wada, Walter, Wolfire   +50 more
core   +1 more source

Evidence for small halos in grand design spiral galaxies

The Astrophysical Journal, 1990
Les courbes de rotation de 41 galaxies spirales de differents types sont comparees. Il est montre que les galaxies ayant deux bras longs et symetriques tendent a avoir des courbes de rotation exterieures tombantes alors que les galaxies ayant des bras multiples ou des bras floconneux courts ont plutot des courbes de rotation presques plates ou s ...
Debra Meloy Elmegreen, Bruce G. Elmegreen   +1 more
openaire   +2 more sources

A high resolution CO map of the inner region of M51 [PDF]

, 1998
M51, the Whirlpool Galaxy, at a distance of ≈ 9,6 Mpc and a systemic velocity of 465 km s^(−1), is the closest “Grand Design” spiral galaxy. Its low inclination (20°) makes it an excellent target for structural studies, e.g.
Aalto, S., Hüttemeister, S., Scoville, N., Thaddeus, P.   +3 more
core   +1 more source

Uncovering Spiral Structure in Flocculent Galaxies [PDF]

, 1996
We present K'(2.1 micron) observations of four nearby flocculent spirals, which clearly show low-level spiral structure and suggest that kiloparsec-scale spiral structure is more prevalent in flocculent spirals than previously supposed.
Adamson A. J., Block D. L., Braine J., Casali M., Elmegreen B. G., Heckman T. M., Michele D. Thornley   +6 more
core   +2 more sources

Dawes Review 4: Spiral Structures in Disc Galaxies [PDF]

, 2014
The majority of astrophysics involves the study of spiral galaxies, and stars and planets within them, but how spiral arms in galaxies form and evolve is still a fundamental problem. Major progress in this field was made primarily in the 1960s, and early
Baba, Junichi, Dobbs, Clare
core   +1 more source

Simulations of Normal Spiral Galaxies [PDF]

, 2003
Results are presented of numerical simulations of normal isolated late type spiral galaxies. Specifically the galaxy NGC 628 is used as a template. The method employs a TREESPH code including stellar particles, gas particles, cooling and heating of the ...
Bottema, Roelof
core   +5 more sources

THE PdBI ARCSECOND WHIRLPOOL SURVEY (PAWS). I. A CLOUD-SCALE/MULTI-WAVELENGTH VIEW OF THE INTERSTELLAR MEDIUM IN A GRAND-DESIGN SPIRAL GALAXY [PDF]

The Astrophysical Journal, 2013
The PdBI (Plateau de Bure Interferometer) Arcsecond Whirlpool Survey (PAWS) has mapped the molecular gas in the central ~9kpc of M51 in its 12CO(1-0) line emission at cloud-scale resolution of ~40pc using both IRAM telescopes. We utilize this dataset to quantitatively characterize the relation of molecular gas (or CO emission) to other tracers of the ...
E. Schinnerer, Sharon E. Meidt, J. Pety, Annie Hughes, Dario Colombo, S. García‐Burillo, K. Schüster, G. Dumas, Clare L. Dobbs, Adam K. Leroy, C. Krämer, Todd A. Thompson, Michael W. Regan   +12 more
openalex   +7 more sources

HI and CO spectroscopy of the unusual host of GRB 171205A: A grand design spiral galaxy with a distorted HI field [PDF]

GRBs produced by the collapse of massive stars are usually found near the most prominent star-forming regions of star-forming galaxies. GRB 171205A happened in the outskirts of a spiral galaxy, a peculiar location in an atypical GRB host. In this paper we present a highly-resolved study of the molecular gas of this host, with CO(1-0) observations from ...
A. de Ugarte Postigo, M. J. Michałowski, C. C. Thoene, S. Martín, Ashwin Ashok, J. F. Agüí Fernández, M. Bremer, Kuntal Misra, D. A. Perley, K. E. Heintz, S. V. Cherukuri, W. Dimitrov, Tobias Géron, Abhik Ghosh, L. Izzo, Д. А. Канн, M. P. Koprowski, Aleksandra Leśniewska, James K. Leung, A. J. Levan, Amitesh Omar, Dagmara Oszkiewicz, M. Polińska, L. Resmi, S. Schulze   +24 more
openalex   +4 more sources

Simulations of dual morphology in spiral galaxies [PDF]

, 2002
Gas and stars in spiral galaxies are modelled with the DUAL code, using hydrodynamic and N-body techniques. The simulations reveal morphological differences mirroring the dual morphologies seen in B and K' band observations of many spiral galaxies.
Berman, S. L.
core   +3 more sources