Results 71 to 80 of about 144,718 (240)
The Dynamics of the Spiral Galaxy M81 [PDF]
Symposium - International Astronomical Union, 1978 The spiral galaxy M81 is a challenging object for testing a density-wave theory. It is of large angular size and favourably inclined to the line of sight; radio observations of neutral atomic hydrogen showing well defined spiral arms with noncircular motions are available (Rots and Shane 1975), and there is evidence from surface photometry for density ...
openaire +3 more sources
Gravitational orbits in the expanding Universe revisited
Frontiers in Astronomy and Space Sciences, 2023 Modified Newtonian equations for gravitational orbits in the expanding Universe indicate that local gravitationally bounded systems like galaxies and planetary systems are unaffected by the expansion of the Universe.
Václav Vavryčuk
doaj +1 more source
Less Wound and More Asymmetric: JWST Confirms the Evolution of Spiral Structure in Galaxies at $z \lesssim 3$ [PDF]
Publ. Astron. Soc. Aust. 42 (2025) e029Spiral galaxies are ubiquitous in the local Universe. However the properties of spiral arms in them are still not well studied, and there is even less information concerning spiral structure in distant galaxies. We aim to measure the most general parameters of spiral arms in remote galaxies and trace their changes with redshift.
arxiv +1 more source
The Study of Nebular Emission on Nearby Spiral Galaxies in the IFU Era
Advances in Astronomy, 2013 A new generation of wide-field emission-line surveys based on integral field units (IFU) is allowing us to obtain spatially resolved information of the gas-phase emission in nearby late-type galaxies, based on large samples of HII regions and full two ...
Fernando Fabián Rosales-Ortega
doaj +1 more source
The Open Journal of Astrophysics, 2021 Countless low-surface brightness objects - including spiral galaxies, dwarf galaxies, and noise patterns - have been detected in recent large surveys.
Oliver Müller, Eva Schnider
doaj +1 more source
Photometry and kinematics of extragalactic star-forming complexes
Open Astronomy, 2022 We investigate spectral and photometric properties of extragalactic star-forming complexes (SFCs). The SFCs were selected in 17 nearby galaxies of a spiral or irregular type, having inclinations less than 45° and distances less than 15 Mpc.
Kuzin Aleksey, Lisitsin Danil
doaj +1 more source
JWST Reveals a Surprisingly High Fraction of Galaxies Being Spiral-like at $0.5\leq z\leq4$ [PDF]
arXiv, 2023 Spiral arms are one of the most important features used to classify the morphology of local galaxies. The cosmic epoch when spiral arms first appeared contains essential clues to the evolution of disk galaxies. In this letter, we used James Webb Space Telescope (JWST) images from the Cosmic Evolution Early Release Science Survey to visually identify ...
arxiv
Towards an Understanding of the Massive Red Spiral Galaxy Formation [PDF]
, 2020 To understand the formation and quenching processes of local massive red spiral galaxies with $M_{\ast} > 10^{10.5}M_{\odot}$, we perform a statistical analysis of their spectroscopic and structural properties, and compare them with elliptical and blue spiral galaxies of similar mass. The sample was selected from the stellar mass catalog of galaxies in
arxiv +1 more source
The present-day galaxy population in spiral galaxies [PDF]
AIP Conference Proceedings, 2009 Although there are many more stellar population studies of elliptical and lenticular galaxies, studies of spiral galaxies are catching up, due to higher signal to noise data on one hand, and better analysis methods on the other. Here I start by discussing some modern methods of analyzing integrated spectra of spiral galaxies, and comparing them with ...
Reynier Peletier +7 more
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The stellar populations of spiral galaxies [PDF]
Monthly Notices of the Royal Astronomical Society, 2000 25 pages; 17 figures; re-submitted to MNRAS after replying to referee's ...
Roelof S. de Jong +2 more
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