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Título:
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Are dry mergers dry, moist or wet ?
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Autores:
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Sánchez Blázquez, P. ;
Gibson, B. K. ;
Kawata, D. ;
Cardiel López, Nicolás ;
Balcells, M.
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Tipo de documento:
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texto impreso
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Editorial:
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Wiley-Blackwell publishing Inc, 2009-12-11
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Dimensiones:
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application/pdf
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Nota general:
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info:eu-repo/semantics/openAccess
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Idiomas:
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Palabras clave:
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Estado = Publicado
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Materia = Ciencias: Física: Astrofísica
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Tipo = Artículo
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Resumen:
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We present a spectral analysis of a sample of red-sequence galaxies identified by van Dokkum as dry merger remnants and ongoing dry mergers. Kinematics, stellar population absorption features and ionization from emission lines are derived. We find that approximately half of the sample showing strong tidal features have younger stellar populations than a control sample at a given velocity dispersion. Conversely, galaxies with weak tidal tails and/or ongoing mergers – with the exception of one galaxy – do not show this young component. This seems to indicate that the young stellar populations observed in a significant fraction of ellipticals is the consequence of star formation triggered by mergers. This young component is consistent with a light ‘frosting’ of young stars (
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En línea:
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https://eprints.ucm.es/60063/1/cardiel21libre.pdf
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