Far‐Ultraviolet and Visible Imaging of the Nucleus of M32

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Abstract
We have imaged the nucleus of M32 at 1600 Å (FUV) and 5500 Å (V) using the Wide-Field/Planetary Camera 2 (WFPC2) aboard the Hubble Space Telescope. We detected the nucleus at 1600 Å using the redleak-free Woods filter on WFPC2. The far-ultraviolet (FUV) light profile can be fitted with a Gaussian of FWHM 046 (4.6 pixels) but cannot be resolved into individual stars; no UV-bright nuclear structure was detected. The (FUV - V) color of the nucleus is 4.9 ± 0.3, which is consistent with earlier observations. We are unable to confirm any radial variation in (FUV - V) within 08 of the nucleus; beyond that radius the FUV surface brightness drops below our detection threshold. We also performed surface photometry in V and found our results to be in excellent agreement with deconvolved WFPC1 results. M32's light profile continues to rise in a nuclear cusp even within 01 of its center. No intermediate-age stellar population is required by evolutionary population synthesis models to reproduce the (FUV - V) color of the nucleus, although these data and current models are insufficient to resolve this issue.
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