Results 51 to 60 of about 510,650 (316)
The Manifold of Elliptical Galaxies [PDF]
Symposium - International Astronomical Union, 1983 The significant number of dimensions of the manifold is two. Notwithstanding the contamination of the second dimension by projection effects, there are arguments for an intrinsic variation.
F.-Th. Lentes, P. Brosche
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Simulating galaxy formation with black hole driven thermal and kinetic feedback [PDF]
, 2016 The inefficiency of star formation in massive elliptical galaxies is widely believed to be caused by the interactions of an active galactic nucleus (AGN) with the surrounding gas.
R. Weinberger +10 more
semanticscholar +1 more source
On the Formation of Elliptical Galaxies [PDF]
The Astrophysical Journal, 1975 Simple collapse and violent relaxation models produce sharply cut off envelopes with ϱ(r) ∝ r–4, whereas actual elliptical galaxies have more extended envelopes approximately given by ϱ(r) ∝ r–3 as implied by Hubble's Law. Numerical models are presented, showing that when cosmological infall effects are included, galaxies are produced with more ...
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A Preferred Orientation Angle for Bipolar Planetary Nebulae
Galaxies, 2020 We present preliminary results from measuring Galactic orientation angles of 766 elliptical and bipolar Planetary Nebulae (PNe) in the Hong Kong/Australian Astronomical Observatory/Strasbourg Observatory H-alpha Planetary Nebula research platform and ...
Andreas Ritter, Quentin A. Parker
doaj +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).
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The Outside‐In Formation of Elliptical Galaxies [PDF]
The Astrophysical Journal, 2006 15 pages, 10 figures, ApJ ...
Cristina Chiappini +3 more
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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.
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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
A FUNDAMENTAL LINE FOR ELLIPTICAL GALAXIES [PDF]
The Astrophysical Journal, 2011 6 pages, 2 figures, 1 table. Accepted for publication in ApJL. Higher resolution figures available at http://www.bo.astro.it/~nair/Morphology/
Roberto Abraham +3 more
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