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

doi:10.1086/522697

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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23 Scopus citations

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 language	English (US)
Pages (from-to)	L31-L34
Journal	Astrophysical Journal
Volume	668
Issue number	1 PART 2
DOIs	https://doi.org/10.1086/522697
State	Published - 2007

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

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10.1086/522697

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

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.",

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T1 - Transient and highly polarized double-peaked hα emission in the seyfert 2 nucleus of NGC 2110

AU - Moran, Edward C.

AU - Barth, Aaron J.

AU - Eracleous, Michael

AU - Kay, Laura E.

PY - 2007

Y1 - 2007

N2 - 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.

AB - 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.

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

Abstract

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