Results 61 to 70 of about 7,649 (143)

Updating the (Supermassive Black Hole Mass) - (Spiral Arm Pitch Angle) Relation: A Strong Correlation for Galaxies with Pseudobulges

, 2017
We have conducted an image analysis of the (current) full sample of 44 spiral galaxies with directly measured supermassive black hole (SMBH) masses, $M_{\rm BH}$, to determine each galaxy's logarithmic spiral arm pitch angle, $\phi$. For predicting black
Davis, Benjamin L., Graham, Alister W., Seigar, Marc S.   +2 more
core   +1 more source

Spiral inflow feeding the nuclear starburst in M83, observed in H-alpha emission with the GHAFAS Fabry-Perot interferometer

, 2007
We present observations of the nearby barred starburst galaxy, M83 (NGC5236), with the new Fabry-Perot interferometer GHAFAS mounted on the 4.2 meter William Herschel Telescope on La Palma.
Andreas A. Lundgren, Carranza G. J., Claude Carignan, Huchtmeier W. K., Jacques Boulesteix, Jean-Luc Gach, Johan H. Knapen, John E. Beckman, Kambiz Fathi, Krajnovic D., Monica Relaño, Muraoka K., Olivier Hernandez, Philippe Amram, Philippe Balard, Schoenmakers R. H. M., Thatte N.   +16 more
core   +1 more source

On the chains of star complexes and superclouds in spiral arms

, 2010
The relation is studied between occurrence of a regular chain of star complexes and superclouds in a spiral arm, and other properties of the latter. A regular string of star complexes is located in the north-western arm of M31; they have about the same ...
Alfaro, Baade, Baba, Bastian, Beck, Beck, Berdnikov, Boeshaar, Braun, Chemin, Chernin, Chernin, Churchwell, Chyzy, Clarke, De La Fuente Marcos, Dobbs, Dobbs, Dobbs, Efremov, Efremov, Efremov, Efremov, Efremov, Efremov, Efremov, Efremov, Efremov, Efremov, Efremov, Efremov, Efremov, Efremov, Egusa, Elmegreen, Elmegreen, Elmegreen, Elmegreen, Elmegreen, Elmegreen, Elmegreen, Elmegreen, Franco, Gittins, Grabelsky, Grabelsky, Grosbøl, Hou, Kang, Kaplan, Lee, Lee, Levine, Loinard, Martínez-García, McGee, Mouschovias, Nakanishi, Neininger, Odekon, Pellet, Roberts, Stock, Tamburro, Vallée, Vallée, Van Den Bergh, Walter, Yu. N. Efremov   +68 more
core   +1 more source

NGC 1300 Dynamics: III. Orbital analysis

, 2010
We present the orbital analysis of four response models, that succeed in reproducing morphological features of NGC 1300. Two of them assume a planar (2D) geometry with $\Omega_p$=22 and 16 \ksk respectively.
Athanassoula, C. Kalapotharakos, Contopoulos, Contopoulos, Contopoulos, Contopoulos, Contopoulos, England, Grosbøl, Grosbøl, Harsoula, Hénon, Kalapotharakos, Kalapotharakos, Kaufmann, Kaufmann, Laurikainen, Lindblad, P. A. Patsis, P. Grosbøl, Patsis, Patsis, Patsis, Patsis, Romero-Gomez, Tsoutsis, Tsoutsis, Voglis, Voglis   +28 more
core   +1 more source

Cloud and Star Formation in Spiral Arms

, 2014
We present the results from simulations of GMC formation in spiral galaxies. First we discuss cloud formation by cloud-cloud collisions, and gravitational instabilities, arguing that the former is prevalent at lower galactic surface densities and the ...
Dobbs, Clare, Pettitt, Alex
core   +1 more source

Spiral Galaxies as Enantiomers: Chirality, an Underlying Feature in Chemistry and Astrophysics

, 2005
Spiral galaxies are axi-symmetric objects showing 2D-chirality when projected onto a plane. Features in common with tetrahedral molecules are pointed out, in particular the existence of a preferred chiral modality for genetic galaxies as in aminoacids ...
Aryal, Aryal, Avalos, Barron, Binney, Binney, Busarello, Capozziello, Capozziello, Capozziello, Capozziello, Eidelman, Eliel, Elmegreen, Elmegreen, Gerin, Hu, Iye, Kashikawa, King, Kondepudi, Liddle, Lin, Lin, Mislow, Peacock, Rayner, Ruch, Sandage, Sparke, Sugai, Vorontsov-Vel'yaminov   +31 more
core   +1 more source

Blue and near-infrared surface photometry of spiral structure in 34 nonbarred grand design and flocculent galaxies

The Astrophysical Journal Supplement Series, 1984
On a examine les profils radiaux du disque et la structure des bras spiraux des 34 galaxies. On donne les profils azimutaux et les diagrammes couleur-amplitude des bras spiraux. On discute des modeles d'evolution de la couleur. Ces modeles sont utilises pour determiner l'amplitude des spirales de densite stellaire sous jacentes et le renforcement ...
D. M. Elmegreen, B. G. Elmegreen
openaire   +1 more source

Cosmic ray feedback in galaxies and galaxy clusters: A pedagogical introduction and a topical review of the acceleration, transport, observables, and dynamical impact of cosmic rays. [PDF]

Astron Astrophys Rev, 2023
Ruszkowski M, Pfrommer C.
europepmc   +1 more source

Soft band X/K luminosity ratios in late-type galaxies and constraints on the population of supersoft X-ray sources

, 2010
We study X-ray to K-band luminosity ratios (L_X/L_K) of late-type galaxies in the 0.3-0.7 keV energy range. From the Chandra archive, we selected nine spiral and three irregular galaxies with point source detection sensitivity better than 5 x 10^36 erg/s
Bavouzet, Bell, Bogdán, Bogdán, Di Stefano, Di Stefano, Dickey, Freedman, Gilfanov, Gilfanov, Grimm, Hachisu, Hachisu, Iben, Irwin, Jarrett, Kahabka, Karachentsev, Leonard, M. Gilfanov, Mannucci, Mannucci, Nomoto, Perlmutter, Riess, Sazonov, Scannapieco, Shtykovskiy, Sullivan, Walter, Á. Bogdán   +30 more
core   +1 more source

Physical Properties of Tidal Features in Interacting Disk Galaxies

, 2008
We explore tidal interactions of a galactic disk with Toomre parameter Q ~ 2 embedded in rigid halo/bulge with a point mass companion moving in a prescribed parabolic orbit.
Donner K. J., Elmegreen B. G., Elmegreen D. M., Elmegreen D. M., Garcia-Burillo S., Gerin M., Goldreich P., Hyung Mok Lee, Jongsoo Kim, Kuijken K., Noguchi M., Pfleiderer J., Sang Hoon Oh, Sellwood J. A., Sellwood J. A., Woong‐Tae Kim   +15 more
core   +1 more source