Candidates for Intracluster Planetary Nebulae in the Virgo Cluster Based on the Suprime-Cam Narrow-Band Imaging in [O III] and $\mathrm{H}\alpha$

Abstract

Abstract We have identified 38 candidates of intracluster planetary nebulae (ICPNe) in a $34^\prime\times27^\prime$ field in the core of the Virgo cluster based on Suprime-Cam imaging through two narrow-band filters centered at redshifted wavelengths of the [O III] $\lambda=5007 \,$$\,{Å}$ and the $\mathrm{H}\alpha \lambda = 6563 \,$$\,{Å}$ lines. Broad-band images in the $V$ and $R$ bands are used to check for any emissions in the adjacent continuum. We describe the method briefly and present a list of the intracluster planetary nebula candidates, together with their finding charts. The ICPN candidates show a highly inhomogeneous distribution, which may suggest an association with the M 86–M 84 subcluster. The fraction of diffuse intracluster light with respect to the total light in galaxies is estimated to be about 10%, leading to an estimate of about 20% for the baryon fraction. A spectroscopic follow up and a wider survey are critical to reveal the nature of the intracluster stellar population.