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  1. Home
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Browsing by Author "Ribbeck Valenzuela, Karen X."

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    Characterization of the dwarf galaxy population in the Centaurus A environment
    (2020) Ribbeck Valenzuela, Karen X.; Puzia, Thomas H.; Pontificia Universidad Católica de Chile. Instituto de Astrofísica
    We report photometric properties of the dwarf galaxy population in the Centaurus A group, along with 51 new dwarf candidates based on the optical u’g’r’i’z’ imaging of 22 deg^2 centered on the nearby giant elliptical galaxy NGC 5128 as part of The Survey of Centaurus A’s Baryonic Structures (SCABS) program. Morphological analysis of the new candidates shows surface brightness profiles are well represented by a single component Sérsic models with an average Sérsic index of = 0.85 ± 0.05. The candidates present luminosities of -12 ≤ Mv ≤ -7 mag, corresponding to stellar masses of 7.5 ≥ log M/M☉ ≥ 4.5, which extend the size-luminosity relation toward fainter luminosities and smaller sizes for known dwarf galaxies outside the Local Group (LG), and are consistent with properties of nearby dwarf spheroidal galaxies. I will discuss the stellar population properties of the newly discovered galaxy sample and compare their properties to other dwarf galaxy samples in the nearby Universe.

Bibliotecas - Pontificia Universidad Católica de Chile- Dirección oficinas centrales: Av. Vicuña Mackenna 4860. Santiago de Chile.

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