A Cosmological Framework for the Co-Evolution of Quasars, Supermassive Black Holes, and Elliptical Galaxies. I. Galaxy Mergers and Quasar Activity [PDF]
, 2007 We develop a model for the cosmological role of mergers in the evolution of starbursts, quasars, and spheroidal galaxies. By combining theoretically well-constrained halo and subhalo mass functions as a function of redshift and environment with empirical
P. Hopkins +3 more
semanticscholar +1 more source
A Potential Galaxy Threshing System in the Cosmos Field [PDF]
, 2006 We report on the discovery of a new potential galaxy threshing system in the COSMOS 2 square degree field using the prime-focus camera, Suprime-Cam, on the 8.2 m Subaru Telescope. This system consists of a giant elliptical galaxy with $M_V \approx -21.6$
A. Koekemoer +38 more
core +2 more sources
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
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
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
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
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
The (galaxy-wide) IMF in giant elliptical galaxies: From top to bottom [PDF]
, 2013 Recent evidence based independently on spectral line strengths and dynamical modelling point towards a non-universal stellar Initial Mass Function (IMF), probably implying an excess of low-mass stars in elliptical galaxies with a high velocity dispersion.
C. Weidner +3 more
semanticscholar +1 more source
The Hubble Sequence in Groups: The Birth of the Early-Type Galaxies [PDF]
, 2010 The physical mechanisms and timescales that determine the morphological signatures and the quenching of star formation of typical (~L*) elliptical galaxies are not well understood.
Carollo, C. M., Feldmann, R., Mayer, L.
core +2 more sources
The PN.S Elliptical Galaxy Survey: Data Reduction, Planetary Nebula Catalog, and Basic Dynamics for NGC 3379 [PDF]
, 2007 We present results from Planetary Nebula Spectrograph (PN.S) observations of the elliptical galaxy NGC 3379 and a description of the data reduction pipeline. We detected 214 planetary nebulae, of which 191 are ascribed to NGC 3379 and 23 to the companion
N. Douglas +14 more
semanticscholar +1 more source