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Environmental effects on the structure of the Dwarf Spheroidal Galaxies

M. Bellazzini·F. Fusi Pecci·F. R. Ferraro
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Abstract

The central surface brightness ($μ_V(0)$) of the dwarf spheroidal satellites of our own Galaxy is found to correlate with their distance from the Galactic Center ($R_{GC}$). This observational evidence suggests that environmental effects could strongly influence their structure. This suggestion is further supported by a clear-cut bivariate correlation linking $μ_V(0)$ to a linear combination of $M_V$, the absolute integrated magnitude, and $R_{GC}$, which seems to be shared also by the M31 spheroidals. Possible implications for the Fundamental Plane of elliptical galaxies and Dark Matter content of dwarf spheroidals are also briefly discussed.

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M. Bellazzini, F. Fusi Pecci, F. R. Ferraro. 1995-09-15. Environmental effects on the structure of the Dwarf Spheroidal Galaxies. https://doi.org/10.1093/mnras%2F278.4.947

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