Results 11 to 20 of about 417,027 (232)
Annual Review of Astronomy and Astrophysics, 2021 Spirals in galaxies have long been thought to be caused by gravitational instability in the stellar component of the disk, but discerning the precise mechanism had proved elusive.
J. Sellwood, K. Masters
semanticscholar +3 more sources
A Model of a Spiral Galaxy [PDF]
Monthly Notices of the Royal Astronomical Society, 1951 G. C. Mevittie, C. Payne-Gaposchkin
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Chemie Ingenieur Technik, EarlyView., 2023 Let us consider an alternative perspective on climate change: The sum of solar radiation and heat generated by human activity result in a net energy input of 1.96 times that of the Sun on the Earth's surface. The expanding global population is expected to exacerbate this issue. Potential solutions are proposed, including replacement and heat recycling.
Martin Bertau, Gerald Steiner
wiley +1 more source
SUPERLUMINOUS SPIRAL GALAXIES [PDF]
The Astrophysical Journal, 2016 ABSTRACT We report the discovery of spiral galaxies that are as optically luminous as elliptical brightest cluster galaxies, with r-band monochromatic luminosity L r = 8–14L* (4.3–7.5 × 1044 erg s−1).
Lauranne Lanz +4 more
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Galaxy Zoo: dust in spiral galaxies★ [PDF]
Monthly Notices of the Royal Astronomical Society, 2010 We investigate the effect of dust on spiral galaxies by measuring the inclination-dependence of optical colours for 24,276 well-resolved SDSS galaxies visually classified in Galaxy Zoo. We find clear trends of reddening with inclination which imply a total extinction from face-on to edge-on of 0.7, 0.6, 0.5 and 0.4 magnitudes for the ugri passbands. We
Robert C. Nichol +15 more
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Celestial Mechanics and Dynamical Astronomy, 2011 We study the role of asymptotic curves in supporting the spiral structure of a N-body model simulating a barred spiral galaxy. Chaotic orbits with initial conditions on the unstable asymptotic curves of the main unstable periodic orbits follow the shape of the periodic orbits for an initial interval of time and then they are diffused outwards ...
M. Harsoula, George Contopoulos
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Rotation and Mass in the Milky Way and Spiral Galaxies [PDF]
, 2016 [PASJ Review Paper] Rotation curves are the basic tool for deriving the distribution of mass in spiral galaxies. In this review, we describe various methods to measure rotation curves in the Milky Way and spiral galaxies.
Y. Sofue
semanticscholar +1 more source
The Circum-Galactic Medium of Massive Spirals. II. Probing the Nature of Hot Gaseous Halo around the Most Massive Isolated Spiral Galaxies [PDF]
, 2017 We present the analysis of the XMM-Newton data of the Circum-Galactic Medium of MASsive Spirals (CGM-MASS) sample of six extremely massive spiral galaxies in the local universe.
Jiangtao Li +5 more
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Measuring the Spin of Spiral Galaxies [PDF]
The Astrophysical Journal, 2006 We compute the angular momentum, the spin parameter and the related distribution function for Dark Matter halos hosting a spiral galaxy. We base on scaling laws, inferred from observations, that link the properties of the galaxy to those of the host halo; we further assume that the Dark Matter has the same total specific angular momentum of the baryons.
Tonini, C. +3 more
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