On the Nature of Fossil Galaxy Groups

Bibcode
2010ASPC..421..225L
La Barbera, F.; de Carvalho, R. R.; de La Rosa, I. G.; Sorrentino, G.; Gal, R. R.; Kohl-Moreira, J. L.
Referencia bibliográfica

Galaxies in Isolation: Exploring Nature Versus Nurture, proceedings of a conference held 12 to 15 May 2009 in Granada, Spain. Edited by Lourdes Verdes-Montenegro, Ascencíon del Olmo, and Jack Sulentic. San Francisco: Astronomical Society of the Pacific, 2010., p.225

Fecha de publicación:
10
2010
Número de autores
6
Número de autores del IAC
0
Número de citas
2
Número de citas referidas
2
Descripción
We present a new sample of 25 fossil groups (FGs) at z<0.1. Both the global properties of FGs (e.g. X-ray luminosity) as well as the photometric properties (i.e. isophotal shape parameter, a4) and spectroscopic parameters (e.g. the α-enhancement) of their first-ranked ellipticals are consistent with those of bright ellipticals located in non-fossil systems. This result favors a scenario where FGs are not a distinct class of systems, but rather a common phase in the life of galaxy groups. We also find no evidence for an evolutionary sequence explaining the formation of galaxies in fossil systems through the merging of galaxies in compact groups.
Tipo
Sin árbitro

Te puede interesar

  • Sin árbitro
    KIC 9163796 - Age determination by asteroseismic grid modelling for an oscillating red giant binary
    The age of a star cannot be measured but only inferred from observational quantities related to age. A wellknown stellar age greatly impacts our understanding of evolution on much larger scales, such as exoplanetary systems or the history of the Milky Way. For stars in the red-giant phase, comparison of observations with evolutionary models
    Grossmann, D. H. et al.

    Fecha de publicación:

    3
    2024
    Bibcode
    2024aecc.conf....7G
    Número de citas
    0
  • Sin árbitro
    Application of Bayesian Inference to disentangle CMB foregrounds
    Both Galactic dust emission and Cosmic infrared background anisotropies (CIB) act as a dominant foreground contaminant for the measurements of the CMB anisotropies (intensity and polarization) at the frequency range above 217 GHz. The Galactic dust and CIB share a similar form of spectral energy distribution, which makes it harder to disentangle
    Adak, Debabrata et al.

    Fecha de publicación:

    1
    2024
    Bibcode
    2024asi..confP..71A
    Número de citas
    0
  • Sin árbitro
    Constraining stellar and orbital co-evolution through ensemble seismology of solar-like oscillators in binary systems
    The evolution of stars and their hosting binary systems is a highly interactive process and cannot be investigated in a segregated manner. Due to the constraints drawn by stellar binarity, oscillating red-giant stars in binary systems represent a unique opportunity to study the details of the structure and evolution of stars in the advanced phases
    Beck, P. G. et al.

    Fecha de publicación:

    3
    2024
    Bibcode
    2024aecc.conf...24B
    Número de citas
    0