Results 111 to 120 of about 67,210 (214)
Galaxy Classification Using EWGC
UniverseThe Enhanced Wide-field Galaxy Classification Network (EWGC) is a novel architecture designed to classify spiral and elliptical galaxies using Wide-field Infrared Survey Explorer (WISE) images.
Yunyan Nie +6 more
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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. +22 more
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Very large spiral galaxies [PDF]
Monthly Notices of the Royal Astronomical Society, 1983 As a first step in the systematic study of large spirals, which may be useful in cosmological tests and studies of galaxy evolution, a catalog of the 107 largest known spiral galaxies is presented. Catalog galaxies have isophotal diameters greater than 90 kpc, assuming an H(zero) value of 50 km/sec per Mpc.
openaire +1 more source
Identification of Intermediate-mass Black Hole Candidates among a Sample of Sd Galaxies
The Astrophysical JournalWe 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 +6 more
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Study photometric properties of spiral galaxy NGC 4448 using CCD camera with multiband filters
Iraqi Journal of Physics, 2018 The goal of our study is to perform detailed multiband surface photometry of the spiral galaxy NGC 4448 and its brightest star-forming regions. The structure and composition of the stellar population in the surface brightness galaxy NGC 4448 was studied
Sinan H. Ali
doaj +1 more source
A Simple Model for Explaining Galaxy Rotation Curves
Galaxies, 2018 A new simple expression for the circular velocity of spiral galaxies is proposed and tested against HI Nearby Galaxy Survey (THINGS) data set. Its accuracy is compared with the one coming from MOND.
Aneta Wojnar +2 more
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Outskirts of spiral galaxies [PDF]
Proceedings of the International Astronomical Union, 2016 AbstractI present an overview of the recent star formation activity in the outer disks of spiral galaxies, from the observational standpoint, with emphasis on the gas content, the star formation law, the metallicity and the stellar populations.
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Grand Design versus Multiarmed Spiral Galaxies: Dependence on Galaxy Structure
The Astronomical JournalWe 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 +3 more
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Dark Gaps and Resonances in Barred Galaxies
The Astrophysical JournalDark 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 +6 more
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The Astronomical JournalGalaxy 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 +4 more
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