SDSS J083253.18+064316.7: one strange object with double-peaked narrow Hαbut single-peaked narrow Hβ
arXiv:1501.04811 · doi:10.1093/mnrasl/slv014
Abstract
In this letter, we firstly report one unique object SDSS J0832+0643 with particular features of narrow balmer emission lines: double-peaked narrow Hαbut single-peaked narrow Hβ. The particular features can not be expected by currently proposed kinematic models for double-peaked narrow emission lines, because the proposed kinematic models lead to similar line profiles of narrow balmer emission lines. However, due to radiative transfer effects, the non-kinematic model can be naturally applied to well explain the particular features of narrow balmer emission lines: larger optical depth in Hαthan 10 leads to observed double-peaked narrow Hα, but smaller optical depth in Hβaround 2 leads to observed single-peaked narrow Hβ. Therefore, SDSS J0832+0643 can be used as strong evidence to support the non-kinematic model for double-peaked narrow emission lines.
5 pages, 1 table, 4 figures, accepted and to be published in MNRAS Letter