Results 51 to 60 of about 662,658 (321)
Dynamical Models of Spherical Galaxies with Massive Halo [PDF]
Journal of Astronomy and Space Sciences, 2003 Using the Schwarzschild's linear programming technique, we obtained the general solutions of the collisionless Bolzmann equation describing the spherical galaxy in dynamical equilibrium.
Mun-Suk Chun +2 more
doaj +1 more source
Decoding NGC 7252 as a blue elliptical galaxy [PDF]
A&A 671, A166 (2023), 2023 Elliptical galaxies with blue optical colours and significant star formation are hypothesised to be major merger remnants of gas-rich spiral galaxies or normal elliptical galaxies with a sudden burst of star formation. We present here a scenario in which blue elliptical galaxies identified in shallow imaging surveys may fail to recover faint features ...
arxiv +1 more source
Elliptical Galaxies with Shells [PDF]
International Astronomical Union Colloquium, 1984 A considerable number of otherwise normal elliptical galaxies show sharp edged, low surface brightness concentric features, often at very large radii from the parent galaxy. Features like this are visible in some of the photographs presented by Arp (1966).
openaire +2 more sources
The Outside‐In Formation of Elliptical Galaxies [PDF]
The Astrophysical Journal, 2006 15 pages, 10 figures, ApJ ...
Cristina Chiappini +3 more
openaire +4 more sources
The Planetary Nebula Spectrograph elliptical galaxy survey: the dark matter in NGC 4494 [PDF]
, 2008 We present new Planetary Nebula Spectrograph observations of the ordinary elliptical galaxy NGC 4494, resulting in positions and velocities of 255 planetary nebulae out to seven effective radii (25 kpc).
N. Napolitano +14 more
semanticscholar +1 more source
Dearth of dark matter or massive dark halo? Mass-shape-anisotropy degeneracies revealed by nmagic dynamical models of the elliptical galaxy NGC 3379 [PDF]
, 2008 Recent results from the Planetary Nebula Spectrograph (PNS) survey have revealed a rapidly falling velocity dispersion profile in the nearby elliptical galaxy NGC 3379, casting doubts on whether this intermediate-luminosity galaxy has the kind of dark ...
F. Lorenzi +12 more
semanticscholar +1 more source
Elliptical Galaxy Dynamics [PDF]
Publications of the Astronomical Society of the Pacific, 1999 97 Latex pages, 14 Postscript figures, uses aastex.
openaire +3 more sources
The Astrophysical Journal Supplement Series, 2023 We investigate the roles of major and minor mergers during brightest cluster galaxy (BCG) assembly using surface brightness profiles, line indices, and fundamental plane relations.
Matthias Kluge, Ralf Bender
doaj +1 more source
Galaxies, 2023 In April 2019, the Event Horizon Telescope (EHT) Collaboration successfully imaged a supermassive black hole (SMBH) for the first time, revealing the apparent “shadow” cast by the dark compact object M87* in the center of the elliptical galaxy Virgo A [..
Michael D. Johnson +3 more
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On the Origin of Isophotal Shapes in Elliptical Galaxies [PDF]
Mon.Not.Roy.Astron.Soc. 359 (2005) 1379-1385, 2004 Using semi-analytical models of galaxy formation, the origin of boxy and disky elliptical galaxies is investigated. We find that the simple scenario, motivated by N-body simulations, in which the isophotal shape is only dependent on the mass ratio of the last major merger, is not able to reproduce the observation that the fraction of boxy and disky ...
arxiv +1 more source