Transient and highly polarized double-peaked hα emission in the seyfert 2 nucleus of NGC 2110

Edward C. Moran, Aaron J. Barth, Michael Eracleous, Laura E. Kay

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Abstract

We have discovered an extremely broad, double-peaked Ha emission line in the polarized flux spectrum of NGC 2110, establishing that this well-studied Seyfert 2 galaxy contains a disk-like hidden broad-line region (BLR). Several properties of NGC 2110 suggest that it is an obscured twin of Arp 102B, the prototypical double-peaked emission-line active galactic nucleus (AGN). A comparison between our data and previous spectra of NGC 2110 indicates that the double-peaked Ha feature is transient. The presence of a disk-like BLR in NGC 2110 has important implications for AGNs: it expands the range of properties exhibited by Seyfert 2 galaxies, and the fact that the BLR is obscured by a torus-like structure provides the first evidence that double-peaked emitters and classical Seyfert nuclei may have the same basic parsec-scale geometry.

Original languageEnglish (US)
Pages (from-to)L31-L34
JournalAstrophysical Journal
Volume668
Issue number1 PART 2
DOIs
StatePublished - 2007

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

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