Results 121 to 130 of about 67,629 (216)

Dark Gaps and Resonances in Barred Galaxies

The Astrophysical Journal
Dark gaps, low surface brightness regions along the bar minor axis, are expected to form as a consequence of secular evolution in barred galaxies. Although several studies have proposed links between dark gap locations and dynamical resonances, the ...
Taehyun Kim, Dimitri A. Gadotti, Myeong-gu Park, Yun Hee Lee, Francesca Fragkoudi, Minjin Kim, Woong-Tae Kim   +6 more
doaj   +1 more source

Identification of Intermediate-mass Black Hole Candidates among a Sample of Sd Galaxies

The Astrophysical Journal
We analyzed images of every northern hemisphere Sd galaxy listed in the Third Reference Catalogue of Bright Galaxies with a relatively face-on inclination ( θ ≤ 30°). Specifically, we measured the spiral arms’ winding angle, ϕ , in 85 galaxies.
Benjamin L. Davis, Alister W. Graham, Roberto Soria, Zehao Jin, Igor D. Karachentsev, Valentina E. Karachentseva, Elena D’Onghia   +6 more
doaj   +1 more source

Dynamically Driven Evolution of the Interstellar Medium in M51 [PDF]

, 2009
Massive star formation occurs in giant molecular clouds (GMCs); an understanding of the evolution of GMCs is a prerequisite to develop theories of star formation and galaxy evolution. We report the highest-fidelity observations of the grand-design spiral
Bock, Douglas C.-J., Carpenter, John M., Corder, Stuartt A., Hawkins, David, Hodges, Mark, Kemball, Athol, Koda, Jin, La Vigne, Misty A., Lamb, James W., Patience, Jenny, Plambeck, Richard L., Potts, Ashley E., Pound, Marc W., Sargent, Anneila I., Sawada, Tsuyoshi, Scott, Stephen L., Scoville, Nick, Teuben, Peter, Voguel, Stuart N., White, Stephen M., Woody, David P., Wright, Melvyn C. H., Zauderer, B. Ashley   +22 more
core  

Polarimetric Observations of Spiral Galaxies

Publications of the Astronomical Society of the Pacific, 1967
The extragalactic systems NCC 3031, NCC 4594, NGC 5194, and NGC 5457 have been observed polarimetrically. Linear polarization between 0.1 and 1.0 percent was detected in the spiral arms of all four galaxies. The planes of vibration indicate that reflection as well as interstellar absorption of starlight by the internal dust clouds of the observed ...
openaire   +1 more source

Grand Design versus Multiarmed Spiral Galaxies: Dependence on Galaxy Structure

The Astronomical Journal
We developed an algorithm to use Galaxy Zoo 3D spiral arm masks produced by citizen scientist volunteers to semiautomatically classify spiral galaxies as either multiarmed or grand design spirals. Our final sample consists of 299 multiarmed and 245 grand
Beverly J. Smith, Matthew Watson, Mark L. Giroux, Curtis Struck   +3 more
doaj   +1 more source

Fine-grained Morphological Study of Galaxy Pairs: A Human-in-the-loop Self-supervised Classification Framework

The Astronomical Journal
Galaxy pairs, as key probes for studying galaxy formation and evolution, provide a unique window for observing galaxy interactions, including the associated exchange of material and related galaxy formation activities.
Yating Li, Jiang-hui Cai, Hai-feng Yang, Jie Wang, Lihua Hu   +4 more
doaj   +1 more source

Radio Jet Feedback on the Inner Disk of Virgo Spiral Galaxy Messier 58

The Astrophysical Journal
Spitzer spectral maps reveal a disk of highly luminous, warm (>150 K) H _2 in the center of the massive spiral galaxy Messier 58, which hosts a radio-loud active galactic nucleus (AGN). The inner 2.6 kpc of the galaxy appears to be overrun by shocks from
Patrick M. Ogle, Iván E. López, Victoria Reynaldi, Aditya Togi, R. Michael Rich, Javier Román, Osmin Caceres, Zhuofu (Chester) Li, Grant Donnelly, J. D. T. Smith, Philip N. Appleton, Lauranne Lanz   +11 more
doaj   +1 more source

Investigating the Complex Ring Morphology in UGC 10168: A Photometric and Structural Analysis of a (R1R2′)SABa(r′l)a Galaxy

Iraqi Journal of Physics
This study provides a comprehensive photometric and structural analysis of the galaxy UGC 10168, which is classified as (R₁R₂′)SABa(r′l)a in the Comprehensive de Vaucouleurs Revised Hubble-Sandage (CVRHS) system.
Zeinab F. Hussein, Abdullah K. Ahmed
doaj   +1 more source

Les galaxies spirales

, 2021
Notre vision des galaxies a beaucoup changé depuis l’ère des grands relevés de galaxies, tels que le Sloan, qui nous apportent une grande statistique avec des millions de galaxies. La classification de la séquence de Hubble est toujours très utilisée, mais elle s’est enrichie de grandes catégories basées sur les couleurs, qui tracent la formation ...
openaire   +1 more source

Can the Dynamo of Spiral-arm Galaxies Be Explained by Anisotropic Conductivity?

The Astrophysical Journal
The possibility of generating a magnetic field by a dynamo effect with anisotropic electrical conductivity rather than turbulent flow has been demonstrated theoretically and experimentally.
Paul Gomez, Franck Plunian, Thierry Alboussière   +2 more
doaj   +1 more source