英仙座DY型变星是北冕座R型变星 (RCB) 的子分类。它们是在渐近巨星分支 (AGB恒星) 中富含碳，显示出是脉动变星和不规则的北冕座R型变星。
英仙座DY 是这一类型变星的原型。
Alcock, C. and Allsman, R.A. and Alves, D.R. and Axelrod, T.S. and Becker, A. and Bennett, D.P. and Clayton, G.C. and Cook, K.H. and Dalal, N. and Drake, A.J. and Freeman, K.C. and Geha, M. and Gordon, K.D. and Griest, K. and Kilkenny, D. and Lehner, M.J. and Marshall, S.L. and Minniti, D. and Misselt, K.A. and Nelson, C.A. and Peterson, B.A. and Popowski, P. and Pratt, M.R. and Quinn, P.J. and Stubbs, C.W. and Sutherland, W. and Tomaney, A. and Vandehei, T. and Welch, D.L.,. The MACHO Project LMC Variable Star Inventory. X. The R Coronae Borealis Stars. Astrophysical Journal (Provided by the Smithsonian/NASA Astrophysics Data System). June 2001, 554 (1): 298–315,. Bibcode:2001ApJ...554..298A. arXiv:astro-ph/0102262. doi:10.1086/321369.
