Results 71 to 80 of about 470,379 (288)

Exploring the evolution of spiral galaxies [PDF]

Monthly Notices of the Royal Astronomical Society, 2002
We have constructed a family of simple models for spiral galaxy evolution to allow us to investigate observational trends in star formation history with galaxy parameters. The models are used to generate broad band colours from which ages and metallicities are derived in the same way as the data.
Eric F. Bell, Eric F. Bell, Richard G. Bower   +2 more
openaire   +3 more sources

Nonlinear Density Wave Theory in a Gaseous Disk

The Astronomical Journal, 2023
A nonlinear solution for the gaseous component of a galactic disk has been derived self-consistently using fluid description and reductive perturbation theory. We show that gas follows a spiral pattern, similarly to the stellar component; but the spirals
Miroslava Vukcevic
doaj   +1 more source

The luminosity function of field galaxies

, 2011
Schmidt's method for construction of luminosity function of galaxies is generalized by taking into account the dependence of density of galaxies from the distance in the near Universe.
A Dressler, A Dressler, A Jr, A Sandage, A Sandage, A. P. Mahtessian, AI Zabludoff, ALB Ribeiro, AP Mahtessian, AP Mahtessian, B Binggeli, B Garilli, B Garilli, BC Bromley, BM Garilli, C Marinoni, CA Valotto, CNA Willmer, D Lynden-Bell, DH Gudehus, E Gaidos, G Efstathiou, H Jerjen, H Lin, H Muriel, HC Ferguson, J Choloniewski, J Huchra, J Loveday, JE Felten, JF Nicol, LF Barrientos, M Paolillo, M Ramella, M Schmidt, MA Arakelyan, MJ Cuesta-Bolao, MM Colless, N Trentham, N Trentham, O Lopez-Cruz, O Lopez-Cruz, P Schechter, PM Lugger, RO Marzke, S Andreon, S Andreon, S Rayzy, SE Zepf, SL Lumsden, SP Driver, T Goto, VYu Terebizh, WR Oegerle, WR Oegerle   +54 more
core   +1 more source

CHARACTERISTICS OF SPIRAL ARMS IN LATE-TYPE GALAXIES [PDF]

, 2014
We have measured the positions of large numbers of H ii regions in four nearly face-on, late-type, spiral galaxies: NGC 628 (M74), NGC 1232, NGC 3184, and NGC 5194 (M51).
Z. N. Honig, M. Reid
semanticscholar   +1 more source

Dark Matter in Spiral Galaxies [PDF]

Symposium - International Astronomical Union, 1995
In this review I will concentrate on three questions concerning the issue of dark matter in spiral galaxies. In the first place (and for the most part) I will discuss the analysis of rotation curves and the question whether the “maximum–disk hypothesis” is valid.
openaire   +5 more sources

ON THE FRACTION OF BARRED SPIRAL GALAXIES [PDF]

The Astrophysical Journal, 2010
We investigate the stellar masses of strongly barred spiral galaxies. Our analysis is based on a sample of ~14000 visually-classified nearby galaxies given in Nair & Abraham 2010(a). The fraction of barred spiral galaxies is found to be a strong function of stellar mass and star formation history, with a minimum near the characteristic mass at ...
Preethi Nair, Roberto Abraham
openaire   +4 more sources

The Identification of a Dusty Multiarm Spiral Galaxy at z = 3.06 with JWST and ALMA

The Astrophysical Journal Letters, 2022
Spiral arms serve crucial purposes in star formation and galaxy evolution. In this paper, we report the identification of “A2744-DSG- z 3,” a dusty, multiarm spiral galaxy at z = 3.059 using the James Webb Space Telescope (JWST) NIRISS imaging and grism ...
Yunjing Wu, Zheng Cai, Fengwu Sun, Fuyan Bian, Xiaojing Lin, Zihao Li, Mingyu Li, Franz E. Bauer, Eiichi Egami, Xiaohui Fan, Jorge González-López, Jianan Li, Feige Wang, Jinyi Yang, Shiwu Zhang, Siwei Zou   +15 more
doaj   +1 more source

The History of Galaxies and Galaxy Number Counts [PDF]

, 1997
(Abridged) A simple quantitative model is presented for the history of galaxies to explain galaxy number counts, redshift distributions and some other related observations. We first infer that irregular galaxies and the disks of spiral galaxies are young,
Abraham R. G., Arimoto N., Arimoto N., Babul A., Broadhurst T. J., Cole S., Colless M., Colless M., Couch W. J., Efstathiou G., Ellis R. S., Glazebrook K., Glazebrook K., Glazebrook K., Guiderdoni B., Jones L. R., K. Shimasaku, Kauffmann G., M. Fukugita, Madau P., Maddox S. J., Metcalfe N., Metcalfe N., Mobasher B., Persic M., Phillipps S., Sandage A., Smith L. F., Storrie-Lombardi L. J., van der Marel R.   +29 more
core   +3 more sources

THE DISCOVERY OF SEVEN EXTREMELY LOW SURFACE BRIGHTNESS GALAXIES IN THE FIELD OF THE NEARBY SPIRAL GALAXY M101 [PDF]

, 2014
Dwarf satellite galaxies are a key probe of dark matter and of galaxy formation on small scales and of the dark matter halo masses of their central galaxies.
A. Merritt, P. V. van Dokkum, R. Abraham
semanticscholar   +1 more source

Magnetic fields in spiral galaxies [PDF]

The Astronomy and Astrophysics Review, 1990
Published in A&ARev (2016) 24 ...
openaire   +5 more sources