Results 161 to 170 of about 482,012 (314)

Comparison of physical characteristics of mass and luminosity function of disk systems in barred and unbarred spiral galaxies

مجلة بغداد للعلوم
Among the most important ways to investigate galaxies' distribution over cosmic time is the luminosity function LF in terms of baryonic disc mass ψS(Mb), magnitude  .
Al Najm M.N., Y. E. Rashed , H. H. AL-Dahlaki   +2 more
doaj   +1 more source

Polar-bulge galaxies

, 2015
Based on SDSS data, we have selected a sample of nine edge-on spiral galaxies with bulges whose major axes show a high inclination to the disk plane. Such objects are called polar-bulge galaxies.
Bizyaev, D. V., Mosenkov, A. V., Reshetnikov, V. P., Savchenko, S. S., Sotnikova, N. Ya.   +4 more
core   +1 more source

Very large spiral galaxies [PDF]

Monthly Notices of the Royal Astronomical Society, 1983
As a first step in the systematic study of large spirals, which may be useful in cosmological tests and studies of galaxy evolution, a catalog of the 107 largest known spiral galaxies is presented. Catalog galaxies have isophotal diameters greater than 90 kpc, assuming an H(zero) value of 50 km/sec per Mpc.
openaire   +1 more source

Soft band X/K luminosity ratios in late-type galaxies and constraints on the population of supersoft X-ray sources

, 2010
We study X-ray to K-band luminosity ratios (L_X/L_K) of late-type galaxies in the 0.3-0.7 keV energy range. From the Chandra archive, we selected nine spiral and three irregular galaxies with point source detection sensitivity better than 5 x 10^36 erg/s
Bavouzet, Bell, Bogdán, Bogdán, Di Stefano, Di Stefano, Dickey, Freedman, Gilfanov, Gilfanov, Grimm, Hachisu, Hachisu, Iben, Irwin, Jarrett, Kahabka, Karachentsev, Leonard, M. Gilfanov, Mannucci, Mannucci, Nomoto, Perlmutter, Riess, Sazonov, Scannapieco, Shtykovskiy, Sullivan, Walter, Á. Bogdán   +30 more
core   +1 more source

HI in the Barred Spiral Galaxies NGC 1365 and NGC 1097. [PDF]

, 1983
J. M. van der Hulst, M. P. Ondrechen, J. H. van Gorkom, E. Hummel   +3 more
openalex   +1 more source

The Schmidt Law at High Molecular Densities

, 2005
We have combined Halpha and recent high resolution CO(J=1-0) data to consider the quantitative relation between gas mass and star formation rate, or the so-called Schmidt law in nearby spiral galaxies at regions of high molecular density.
Egusa, Fumi, Komugi, Shinya, Nakanishi, Hiroyuki, Onodera, Sachiko, Sofue, Yoshiaki   +4 more
core   +1 more source

The vertical structure and kinematics of HI in spiral galaxies [PDF]

, 2000
R. Sancisi, Filippo Fraternali, Tom Oosterloo, G. van Moorsel   +3 more
openalex   +1 more source

Outskirts of spiral galaxies [PDF]

Proceedings of the International Astronomical Union, 2016
AbstractI present an overview of the recent star formation activity in the outer disks of spiral galaxies, from the observational standpoint, with emphasis on the gas content, the star formation law, the metallicity and the stellar populations.
openaire   +1 more source

Conditions for Bar Formation in Bulgeless Disk Galaxies

The Astrophysical Journal
While bars are commonly observed in disk galaxies, the precise conditions governing their formation remain incompletely understood. To investigate these conditions, we perform a suite of N -body simulations of bulgeless disk galaxies with stellar masses ...
Dajeong Jang, Woong-Tae Kim, Yun Hee Lee
doaj   +1 more source

Luminous Infrared Galaxies in the Local Universe

, 2006
We study the morphology and star formation properties of 159 local luminous infrared galaxy (LIRG) using multi-color images from Data Release 2 (DR2) of the Sloan Digital Sky Survey (SDSS). The LIRGs are selected from a cross-correlation analysis between
Cao, C., Deng, Z. G., Mao, S., Wang, J. L., Wu, Hong, Xia, X. Y.   +5 more
core   +1 more source