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A New Reservoir of Dwarf Galaxy Candidates in the Centaurus A Group

  • Matthew A. Taylor (a1), Paul Eigenthaler (a2), Thomas H. Puzia (a2), Roberto P. Muñoz (a2), Karen X. Ribbeck (a2), Hong-Xin Zhang (a3), Yasna Ordenes-Briceño (a2) and Mia Sauda Bovill (a4)...

Abstract

We have searched optical u′g′r′i′z′ imaging of 22 deg2 centred on the nearby giant elliptical galaxy NGC 5128 for new dwarf galaxies in the Centaurus A group. We report 45 promising new candidates, which are broadly consistent with the properties of nearby dwarf spheroidal galaxies and extend the size-luminosity relation toward fainter total luminosities and smaller sizes for known dwarf galaxies outside the Local Group (LG). Altogether, these new results show NGC 5128 to be the host of a large reservoir of low-mass dwarf galaxies that is at least as rich as that of the LG and is ripe for detailed follow-up observations.

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A New Reservoir of Dwarf Galaxy Candidates in the Centaurus A Group

  • Matthew A. Taylor (a1), Paul Eigenthaler (a2), Thomas H. Puzia (a2), Roberto P. Muñoz (a2), Karen X. Ribbeck (a2), Hong-Xin Zhang (a3), Yasna Ordenes-Briceño (a2) and Mia Sauda Bovill (a4)...

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