SPSite currentSite = SPContext.Current.Site;
SearchQueryAndSiteSettingsServiceProxy settingsProxy = SPFarm.Local.ServiceProxies.GetValue<SearchQueryAndSiteSettingsServiceProxy>();
SearchServiceApplicationProxy searchProxy = settingsProxy.ApplicationProxies.GetValue<SearchServiceApplicationProxy>("SEARCH SERVICE NAME");
SearchObjectOwner serviceApplicationOwner = new SearchObjectOwner(SearchObjectLevel.Ssa);
SourceRecord serviceApplicationResultSourceMedia = searchProxy.GetResultSourceByName("SEARCH RESULT SOURCE NAME", serviceApplicationOwner);

KeywordQuery query = new KeywordQuery("CURRENT SITE OBJECT");