The Outer Halos of Elliptical Galaxies

@article{Gerhard2010TheOH,
  title={The Outer Halos of Elliptical Galaxies},
  author={Ortwin Gerhard},
  journal={arXiv: Astrophysics of Galaxies},
  year={2010},
  pages={339-345}
}
  • O. Gerhard
  • Published 17 September 2010
  • Physics
  • arXiv: Astrophysics of Galaxies
Recent progress is summarized on the determination of the density distributions of stars and dark matter, stellar kinematics,and stellar population properties in the extended, low-surface brightness halo regions of elliptical galaxies. With integral field absorption spectroscopy and with planetary nebulae as tracers,velocity dispersion and rotation profiles have been followed to ~ 4 and ~ 5–8 effective radii, respectively, and in M87 to the outer edge at ~ 150 kpc. The results are generally… Expand
Magnetic fields in elliptical galaxies: using the Laing–Garrington effect in radio galaxies and polarized emission from background radio sources
  • Hilay Shah, A. Seta
  • Physics
  • Monthly Notices of the Royal Astronomical Society
  • 2021
Magnetic fields in elliptical galaxies are poorly constrained because of a lack of significant synchrotron emission from them. In this paper, we explore the properties of magnetic fields inExpand

References

SHOWING 1-10 OF 51 REFERENCES
Steepening mass profiles, dark matter and environment of X-ray bright elliptical galaxies
We use a new non-parametric Bayesian approach to obtain the most probable mass distributions and circular velocity curves along with their confidence ranges, given deprojected density and temperatureExpand
Dark Matter Scaling Relations and the Assembly Epoch of Coma Early-Type Galaxies
Axisymmetric, orbit-based dynamical models are used to derive dark matter scaling relations for Coma early-type galaxies. From faint to bright galaxies, halo core radii and asymptotic circularExpand
Kinematics and line strength indices in the halos of the Coma brightest cluster galaxies NGC 4874 and NGC 4889
Aims. We investigate the stellar kinematics and line strength indices in the outer halos of brightest cluster galaxies (BCGs) in the Coma cluster to obtain the outer halo V rot and σ profiles and toExpand
Scaling Mass Profiles around Elliptical Galaxies Observed with Chandra and XMM-Newton
We investigated the dynamical structure of 53 elliptical galaxies using the Chandra archival X-ray data. In X-ray-luminous galaxies, temperature increases with radius and gas density isExpand
Stars beyond galaxies: the origin of extended luminous haloes around galaxies
We use numerical simulations to investigate the origin and structure of the luminous haloes that surround isolated galaxies. These stellar structures extend out to several hundred kpc away from aExpand
Dissipation and Extra Light in Galactic Nuclei. III.
We investigate how 'extra' or 'excess' central light in the surface brightness profiles of cusp or power-law elliptical galaxies relates to the profiles of ellipticals with cores. The envelopes ofExpand
The Planetary Nebula System and Dynamics in the Outer Halo of NGC 5128
The halos of elliptical galaxies are faint and difficult to explore, but they contain vital clues to both structure and formation. We present the results of an imaging and spectroscopic survey forExpand
The Planetary Nebula Spectrograph elliptical galaxy survey: the dark matter in NGC 4494
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 (25Expand
A chandra view of dark matter in early-type galaxies
We present a Chandra study of mass profiles in seven elliptical galaxies, of which three have galaxy-scale and four have group-scale halos, demarcated at 1013 M☉. These represent the best availableExpand
DISSIPATION AND EXTRA LIGHT IN GALACTIC NUCLEI. II. “CUSP” ELLIPTICALS
We study the origin and properties of "extra" or "excess" central light in the surface brightness profiles of cusp or power-law elliptical galaxies. Dissipational mergers give rise to two-componentExpand
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