Results 1 to 10 of about 470,360 (269)
Galaxies, 2023 Our vision of galaxies has changed significantly since the era of large galaxy surveys like the Sloan, which gave us extensive statistics with millions of galaxies.
F. Combes
semanticscholar +3 more sources
SUPERLUMINOUS SPIRAL GALAXIES [PDF]
The Astrophysical Journal, 2015 We report the discovery of spiral galaxies that are as optically luminous as elliptical brightest cluster galaxies, with r-band monochromatic luminosity Lr = 8–14L* (4.3–7.5 × 1044 erg s−1).
P. Ogle, L. Lanz, Cyril Nader, G. Helou
semanticscholar +8 more sources
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 ...
Contopoulos, George, Harsoula, Mirella
core +4 more sources
A photometrically and spectroscopically confirmed population of passive spiral galaxies [PDF]
, 2016 We have identified a population of passive spiral galaxies from photometry and integral field spectroscopy. We selected z < 0.035 spiral galaxies that have WISE colours consistent with little mid-infrared emission from warm dust.
Bonne, Nicolas J. +5 more
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Six spiral galaxies lacking dark matter [PDF]
Scientific ReportsDark matter is believed to be the essential building blocks of galaxy formation. While instances of galaxies lacking dark matter have been observed, these occurrences are typically linked to specific formation mechanisms, making them stand out as unique ...
Cheng-Yu Chen, Chorng-Yuan Hwang
doaj +2 more sources
Dawes Review 4: Spiral Structures in Disc Galaxies [PDF]
Publications Astronomical Society of Australia, 2014 The majority of astrophysics involves the study of spiral galaxies, and stars and planets within them, but how spiral arms in galaxies form and evolve is still a fundamental problem. Major progress in this field was made primarily in the 1960s, and early
Baba, Junichi, Dobbs, Clare
core +3 more sources
Updating the (Supermassive Black Hole Mass) - (Spiral Arm Pitch Angle) Relation: A Strong Correlation for Galaxies with Pseudobulges [PDF]
, 2017 We have conducted an image analysis of the (current) full sample of 44 spiral galaxies with directly measured supermassive black hole (SMBH) masses, $M_{\rm BH}$, to determine each galaxy's logarithmic spiral arm pitch angle, $\phi$. For predicting black
Davis, Benjamin L. +2 more
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Rotation Curves of Spiral Galaxies [PDF]
, 2000 Rotation curves of spiral galaxies are the major tool for determining the distribution of mass in spiral galaxies. They provide fundamental information for understanding the dynamics, evolution and formation of spiral galaxies.
Amram P +67 more
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Annual Review of Astronomy and Astrophysics, 2022 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. Tidal interactions, and perhaps bars, may provoke some spiral responses, but spirals in many galaxies must be self-excited.
Sellwood, Jerry A., Masters, Karen
openaire +2 more sources
Planetary Nebulae and the Ionization of the Interstellar Medium in Galaxies
Frontiers in Astronomy and Space Sciences, 2022 We discuss the role of planetary nebulae and their progeny in galaxy context in terms of ionization of the galaxy interstellar medium. This regards ionized gas outside the disk of spiral galaxies, the diffuse ionized medium in spiral galaxies, and the ...
Grażyna Stasińska +2 more
doaj +1 more source