A remarkable ruby: Absorption in dense gas, rather than evolved stars, drives the extreme Balmer break of a little red dot at z = 3.5
A. De Graaff, H.W. Rix, R.P. Naidu, I. Labbé, B. Wang, J. Leja, J.J. Matthee, H. Katz, J.E. Greene, R.E. Hviding, J. Baggen, R. Bezanson, L.A. Boogaard, G. Brammer, P. Dayal, P. Van Dokkum, A.D. Goulding, M. Hirschmann, M.V. Maseda, I. Mcconachie, T.B. Miller, E. Nelson, P.A. Oesch, D.J. Setton, I. Shivaei, A. Weibel, K.E. Whitaker, C.C. Williams, Astronomy and Astrophysics 701 (2025).