Results 11 to 20 of about 470,379 (288)
Dark matter cores and cusps in spiral galaxies and their explanations [PDF]
Journal of Cosmology and Astroparticle Physics, 2019 We compare proposed solutions to the core vs cusp issue of spiral galaxies, which has also been framed as a diversity problem, and demonstrate that the cuspiness of dark matter halos is correlated with the stellar surface brightness.
M. Kaplinghat, T. Ren, Hai-Bo Yu
semanticscholar +1 more source
Lopsided spiral galaxies [PDF]
Physics Reports, 2009 The light distribution in the disks of many galaxies is non-axisymmetric or `lopsided' with a spatial extent much larger along one half of a galaxy than the other, as in M101. Recent near-IR observations show that lopsidedness is common. The stellar disks in nearly 30 % of galaxies have significant lopsidedness, greater than 10 % measured as the ...
Jog, Chanda J, Combes, Francoise
openaire +5 more sources
Black Hole Mass Scaling Relations for Spiral Galaxies. I. MBH–M*,sph [PDF]
Astrophysical Journal, 2018 The (supermassive black hole mass, MBH)–(bulge stellar mass, ) relation is, obviously, derived using two quantities. We endeavor to provide accurate values for the latter via detailed multicomponent galaxy decompositions for the current full sample of 43
Benjamin Lee Davis +2 more
semanticscholar +1 more source
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
openaire +7 more sources
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
Reanalysis of the Spin Direction Distribution of Galaxy Zoo SDSS Spiral Galaxies
Advances in Astronomy, 2023 The distribution of the spin directions of spiral galaxies in the Sloan Digital Sky Survey has been a topic of debate in the past two decades, with conflicting conclusions reported even in cases where the same data were used.
Darius Mcadam, Lior Shamir
doaj +1 more source
Spirality: A Novel Way to Measure Spiral Arm Pitch Angle
Galaxies, 2022 We present the MATLAB code Spirality, a novel method for measuring spiral arm pitch angles by fitting galaxy images to spiral templates of known pitch. Computation time is typically on the order of 2 min per galaxy, assuming 8 GB of working memory.
Deanna Shields +9 more
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Discovery of a Planar Black Hole Mass Scaling Relation for Spiral Galaxies
The Astrophysical Journal Letters, 2023 Supermassive black holes (SMBHs) are tiny in comparison to the galaxies they inhabit, yet they manage to influence and coevolve along with their hosts.
Benjamin L. Davis, Zehao Jin
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SDSS-IV MaNGA: global stellar population and gradients for about 2000 early-type and spiral galaxies on the mass-size plane [PDF]
, 2018 We perform full spectrum fitting stellar population analysis and Jeans Anisotropic modelling (JAM) of the stellar kinematics for about 2000 early-type galaxies (ETGs) and spiral galaxies from the MaNGA DR14 sample.
Hongyu Li +14 more
semanticscholar +1 more source
On the plausible origins of the spiral character of galaxies
Open Astronomy, 2021 We here-in demonstrate that the proposed hitherto unknown gravitomagnetic dark-force that hypothetically explains the Flat Rotation Curves of Spiral Galaxies — this same force, explains very well, the logarithmic and as-well, the barred spiral shapes of ...
Nyambuya Golden Gadzirayi
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