Results 31 to 40 of about 85,185 (266)

Surface Photometry of Spiral Galaxy NGC 5005 and Elliptical Galaxy NGC 4278

مجلة بغداد للعلوم, 2018
Two galaxies have been chosen, spiral galaxy NGC 5005 and elliptical galaxy NGC 4278 to study their photometric properties by using surface photometric techniques with griz-Filters. Observations are obtained from the Sloan Digital Sky Survey (SDSS).
Baghdad Science Journal
doaj   +1 more source

JWST Insight into a Lensed HST-dark Galaxy and Its Quiescent Companion at z = 2.58

The Astrophysical Journal Letters, 2023
Using the novel James Webb Space Telescope (JWST)/NIRCam observations in the A2744 field, we present a first spatially resolved overview of a Hubble Space Telescope (HST)-dark galaxy, spectroscopically confirmed at z = 2.58 with magnification μ ≈ 1.9 ...
Vasily Kokorev, Shuowen Jin, Georgios E. Magdis, Karina I. Caputi, Francesco Valentino, Pratika Dayal, Maxime Trebitsch, Gabriel Brammer, Seiji Fujimoto, Franz Bauer, Edoardo Iani, Kotaro Kohno, David Blánquez Sesé, Carlos Gómez-Guijarro, Pierluigi Rinaldi, Rafael Navarro-Carrera   +15 more
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Estimating the Dark Halo Mass from the Relative Thickness of Stellar Disks [PDF]

, 2006
We analyze the relationship between the mass of a spherical component and the minimum possible thickness of stable stellar disks. This relationship for real galaxies allows the lower limit on the dark halo mass to be estimated (the thinner the stable ...
A. Toomre, A. Toomre, A. V. Khoperskov, A. V. Khoperskov, A. V. Khoperskov, A. V. Zasov, A. V. Zasov, A. V. Zasov, D. Merritt, D. Pfenniger, E. A. Mikhaĭlova, E. Athanassoula, F. Combes, F. Combes, J. A. Sellwood, J. A. Sellwood, J. Barnes, J. Dubinski, J. N. Bahcall, J. Navarro, L. Hernquist, L. Spitzer, M. Kregel, N. Ya. Sotnikova, N. Ya. Sotnikova, N. Ya. Sotnikova, N. Ya. Sotnikova, P. A. Patsis, P. C. Kruit van der, P. J. Teuben, R. Bottema, R. M. Kulsrud, S. A. Rodionov, S. A. Rodionov, S. S. McGaugh, T. S. Albada van, V. L. Polyachenko   +36 more
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Outer Rings in Early-type Galaxies: From Vorontsov-Velyaminov to Present

Open Astronomy, 2014
‘Ringed galaxies’, or disk galaxies with prominent outer ring structures, separated visually from the main galactic bodies, were discovered and intensively studied by B. A. Vorontsov-Vel’yaminov whose 110th anniversary is celebrated this year. We discuss
Silchenko O., Ilyina M., Katkov I.
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Star formation in bulgeless late type galaxies: clues to their evolution

, 2012
We present GMRT 1280 MHz radio continuum observations and follow-up optical studies of the disk and nuclear star formation in a sample of low luminosity bulgeless galaxies. The main aim is to understand bulge formation and overall disk evolution in these
Baggett, Banerjee, Bell, Boissier, Boselli, Brook, Brook, Böker, Böker, Böker, Böker, C. Sengupta, Cao, Combes, Daddi, Das, de Blok, D’Onghia, Ferrarese, Filippenko, Filippenko, Ganda, Gebhardt, Gil de Paz, Gil de Paz, Gliozzi, Governato, Gültekin, Heckman, James, K. Misra, Karachentsev, Kautsch, Kennicutt, Kinney, Kormendy, Kormendy, Kormendy, Kormendy, Kormendy, M. Das, Martinez-Valpuesta, Matthews, McAlpine, Neumayer, Oke, Peterson, Phookun, Pilyugin, Popescu, Raha, Ramya, Ravindranath, Roussel, S. Ramya, Salucci, Satyapal, Satyapal, Sellwood, Seth, Shields, Silk, Smith, Smith, Swarup, Walcher, Waller, Watson, White, Young, Zackrisson   +70 more
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The Stability of Some Galaxy Disks is Still Perplexing

The Astrophysical Journal, 2023
The problem of how some disk galaxies avoid forming bars remains unsolved. Many galaxy models having reasonable properties continue to manifest vigorous instabilities that rapidly form strong bars and no widely accepted idea has yet been advanced to ...
J. A. Sellwood, R. G. Carlberg
doaj   +1 more source

Forming Young Bulges within Existing Disks: Statistical Evidence for External Drivers

, 2003
Contrary to traditional models of galaxy formation, recent observations suggest that some bulges form within preexisting disk galaxies. Such late-epoch bulge formation within disks seems to be linked to disk gas inflow and central star formation, caused ...
Abraham R. G., Andredakis Y. C., Becker R. H., Elizabeth J. Barton, Ellis R. S., Friedli D., Kauffmann G., Rolf A. Jansen, Schwarzkopf U., Sheila J. Kannappan, Shioya Y., Tully R. B.   +11 more
core   +1 more source

Astrophysically Motivated Bulge-Disk Decompositions of SDSS Galaxies [PDF]

, 2012
We present a set of bulge-disk decompositions for a sample of 71,825 SDSS main-sample galaxies in the redshift range 0 ...
Abazajian, Aihara, Allen, Athanassoula, Balcells, Baldry, Bamford, Bell, Benson, Bernardi, Bernardi, Blanton, Blanton, Blanton, Blanton, Bundy, Bundy, Burstein, C. N. Lackner, Cameron, Caon, Capaccioli, de Jong, de Souza, de Vaucouleurs, de Vaucouleurs, Driver, Driver, Driver, Drory, Eggen, Elmegreen, Falcón-Barroso, Fathi, Fisher, Fisher, Franx, Freeman, Gadotti, Gadotti, Gonzalez, Graham, Graham, Guo, Hao, Hao, Hubble, J. E. Gunn, Jarrett, Kauffmann, Kent, Kent, Kormendy, Kormendy, Kormendy, Kregel, Lauer, Laurikainen, Lima, Liske, Lupton, MacArthur, Maller, Mandelbaum, Markwardt, Masters, Mendez, Moorthy, Noguchi, Padmanabhan, Peletier, Peletier, Peng, Sandage, Schawinski, Shao, Simard, Simard, Simmons, Strateva, Sérsic, Trujillo, Tully, van den, Weinzirl, Wyse   +85 more
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Dynamical stability and galaxy evolution in LSB disk galaxies [PDF]

AIP Conference Proceedings, 1997
We demonstrate that, due to their low surface mass density and large dark matter content, LSB disks are quite stable against the growth of global bar modes. However, they may be only marginally stable against local disk instabilities. We simulate a collision between an LSB and HSB galaxy and find that, while the HSB galaxy forms a strong bar, the ...
Mihos, C., McGaugh, S. S., Blok, E. de
openaire   +3 more sources

Forming double-barred galaxies from dynamically cool inner disks [PDF]

, 2015
About one-third of early-type barred galaxies host small-scale secondary bars. The formation and evolution of such double-barred (S2B) galaxies remain far from being well understood.
Bertin G., Combes F. ed Shlosman I., Corsini E. M., de Lorenzo-Cáceres A., Debattista V. P., Debattista V. P., Debattista V. P., Dekel A., Elmegreen B. G., Englmaier P., Erwin P., Friedli D., Heller C., Heller C. H., Jenkins A., Juntai Shen, Laine S., Maciejewski W., Min Du, Petitpas G. R., Rautiainen P., Sellwood J. A., Shen J., Shlosman I., Silverman B. W., Toomre A. ed Fall S. M., Victor P. Debattista   +26 more
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