Results 91 to 100 of about 1,342 (185)
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
Galaxy Spiral Arm Count versus Concentration and Mass: A First Look with Euclid
The Astrophysical JournalUsing catalogued information from Euclid Quick Data Release 1, we compare two-armed and three-armed spiral galaxies as classified by the Euclid Zoobot software.
Beverly J. Smith +3 more
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The Astrophysical JournalThe Whirlpool Galaxy is a well-studied grand design galaxy with two major spiral arms, and a large satellite NGC 5195. The arms both show long uniform sections with perturbations (“kinks” or sharp turns) in specific regions.
Joan Font +4 more
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The Impacts of Bars, Spirals, and Bulge Size on Gas-phase Metallicity Gradients in MaNGA Galaxies
The Astrophysical JournalAs galaxies evolve over time, the orbits of their constituent stars are expected to change in size and shape, moving stars away from their birth radius. Radial gas flows are also expected. Spiral arms and bars in galaxies are predicted to help drive this
M. E. Wisz +4 more
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Spiral Arms across Cosmic Time: JWST Measurements of the Pitch Angles of Spiral Galaxies at z < 3.5
The Astrophysical JournalThe properties of spiral galaxies in the early Universe remain poorly studied, and as such, little is known about their nature and evolution. We use JWST data to measure the pitch angles of spiral galaxies across cosmic time.
Vicki Kuhn +6 more
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Extended universal rotational curve of spiral galaxies
Discover SpaceIn this work, we aim to advance the Universal Rotation Curve (URC) paradigm by leveraging new data and extending its observational domain. Building on previous studies that established the URC using optical rotation curves reaching the galaxy optical ...
Esha Bhatia +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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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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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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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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