Results 41 to 50 of about 9,531 (227)

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.
doaj   +1 more source

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

Circumnuclear Keplerian Disks in Galaxies

The Astrophysical Journal, 1998
In this paper we demonstrate the possibility of inferring the presence of Keplerian gaseous disks using optical ground-based telescopes properly equipped. We have modeled the peculiar bidimensional shape of the emission lines in a sample of five S0-Sa galaxies as due to the motion of a gaseous disk rotating in the combined potential of a central point ...
BERTOLA, FRANCESCO, CAPPELLARI, MICHELE, FUNES J. G., CORSINI, ENRICO MARIA, PIZZELLA, ALESSANDRO, VEGA BELTRÁN J. C.   +5 more
openaire   +4 more sources

The ATLAS(3D) project - XXV. Two-dimensional kinematic analysis of simulated galaxies and the cosmological origin of fast and slow rotators [PDF]

, 2014
We present a detailed two-dimensional stellar dynamical analysis of as ample of 44 cosmological hydrodynamical simulations of individual central galaxies with stellar masses of 2 x 1010Msun ∼≤ Mstar ∼≤ 6x 1011Msun.
Bayet, E, Ven, G. v. d., Bureau, M, Davis, T., Davies, RL, Oser, L, Duc, P-A, Morganti, R., Johansson, P., McDermid, R., Johansson, PH, Davis, T. A., Oosterloo, T, Blitz, L., McDermid, R. M., Oser, L., Naab, T, Weijmans, A., Sarzi, Marc, Duc, P. -A., Alatalo, K, Davies, R., Khochfar, S, Sarzi, M, Alatalo, Katherine, Duc, P.A., Davis, Timothy A., van de Ven, G, Weijmans, A, Khochfar, S., Scott, N, Bois, M., Bournaud, Frederic, Bayet, E., Serra, P., Krajnovic, D, Blitz, L, van de Ven, G., Hirschmann, M., Cappellari, M, Kuntschner, H., de Zeeuw, P. T., Cappellari, Michele, Duc, P.-A., Bournaud, F., Scott, N., Kuntschner, H, Bureau, M., Davis, T., L., Hirschmann, M, Naab, T., Young, L., Davies, Roger, Hirschmann, Michaela, Bayet, Estelle, Krajnovi, D., Morganti, R, de Zeeuw, P., Serra, P, Davies, R. L., Alatalo, K., McDermid, Richard M., Bois, M, Emsellem, E, de Zeeuw, PT, Ven, G. van de, Duc, P.- A., Crocker, A., Bournaud, F, McDermid, RM, Crocker, A, Davis, TA, Krajnovic, D., Emsellem, E., Duc, P., Cappellari, M., Johansson, P. H., Oosterloo, T., Young, LM, Young, Lisa M., Davis, T.,, Naab, Thorsten, Sarzi, M., Young, L. M., de Zeeuw, P.T.   +84 more
core   +1 more source

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, Marina Trevisan, Natalia Vale Asari   +2 more
doaj   +1 more source

Tidal Thickening of Galaxy Disks [PDF]

, 1997
3 pages, including two PostScript figures, LaTeX (lamuphys.sty). To be published in the proceedings of the "Galaxy Scaling Relations: Origins, Evolution and Applications" Third ESO-VLT Workshop, November 18-20 ...
Reshetnikov, Vladimir, Combes, Francoise
openaire   +2 more sources

Near-Infrared Surface Photometry of Bulges and Disks of Spiral Galaxies : The Data [PDF]

, 1997
: We present optical and near-infrared (NIR) surface brightness and colour profiles,in bands ranging from U to K, for the disk and bulge components of a complete sample of 30 nearby S0 to Sbc galaxies with inclinations larger than 50 degrees. We describe
Balcells, M.,, Balcells, M, Peletier, R. F., Balcells, M., Peletier, R. F.,, Peletier, RF   +5 more
core   +1 more source

Finding Massive Double-exponential Disk Galaxies with Extended Low Surface Brightness Stellar Disk: An IllustrisTNG Exploration

The Astrophysical Journal
We study massive disk galaxies (stellar mass > = 10 ^11 M _⊙ ) at z = 0 from IllustrisTNG simulation to detect galaxies that contain two exponential stellar disks—a central high surface brightness (HSB) disk surrounded by an extended low surface ...
Suchira Sarkar, Kanak Saha
doaj   +1 more source

Composite Bulges. III. A Study of Nuclear Star Clusters in Nearby Spiral Galaxies

The Astrophysical Journal, 2023
We present photometric and morphological analyses of nuclear star clusters (NSCs)—very dense, massive star clusters present in the central regions of most galaxies—in a sample of 33 massive disk galaxies within 20 Mpc, part of the “Composite Bulges ...
Aishwarya Ashok, Anil Seth, Peter Erwin, Victor P. Debattista, Adriana de Lorenzo-Cáceres, Dmitri A. Gadotti, Jairo Méndez-Abreu, John E. Beckman, Ralf Bender, Niv Drory, Deanne Fisher, Ulrich Hopp, Matthias Kluge, Tutku Kolcu, Witold Maciejewski, Kianusch Mehrgan, Taniya Parikh, Roberto Saglia, Marja Seidel, Jens Thomas   +19 more
doaj   +1 more source

The ORCA‐TWIN qCMOS Experiment I. Science Case and Commissioning at Calar Alto Observatory

Astronomische Nachrichten, EarlyView.
ABSTRACT We describe a pilot study to explore a new generation of fast and low noise CMOS image sensors for time domain astronomy, using two remote telescopes with a baseline of 1635 km. The experiment involves direct imaging with novel qCMOS image sensor technology that combines fast readout with sub‐electron readout noise.
Martin M. Roth, Paško Roje, Stella Vješnica, Stefan Cikota, Alex J. Brown, Mike Kretlow, Marco Azzaro, Santiago Reinhart, Jesús Aceituno, Harry Dawson, Carsten Denker, Torsten Enßlin, Stephan Geier, Thomas Granzer, Thomas Kupfer, Gianluca Li Causi, Samaya Nissanke, José Luis Ortiz, Fernando Pedichini, Katja Poppenhäger, Axel Schwope   +20 more
wiley   +1 more source