Evidence of a starburst within 9 parsecs of the active nucleus of NGC 1097

T. Storchi-Bergmann; R. S. Nemmen; P. F. Spinelli; M. Eracleous; A. S. Wilson; A. V. Filippenko; M. Livio

doi:10.1086/430421

Evidence of a starburst within 9 parsecs of the active nucleus of NGC 1097

T. Storchi-Bergmann, R. S. Nemmen, P. F. Spinelli, M. Eracleous, A. S. Wilson, A. V. Filippenko, M. Livio

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Abstract

We report evidence of a recent burst of star formation located within 9 pc of the active nucleus of NGC 1097. The observational signatures of the starburst include UV absorption lines and continuum emission from young stars observed in a small-aperture Hubble Space Telescope spectrum. The burst is ≤ a few × 10⁶ yr old, has a mass of ∼10⁶ M _⊙, an observed luminosity of 1.5 × 10⁷ L _⊙, and is obscured by A_v ≈ 3 mag. The importance of this finding is twofold: (1) the proximity of the starburst to the active nucleus and thus its possible association with it, and (2) its obscuration by and apparent association with a dusty absorbing medium, while the broad emission lines appear unobscured, suggesting that the starburst could be embedded in a circumnuclear torus as predicted in the unified model of active galactic nuclei.

Original language	English (US)
Pages (from-to)	L13-L16
Journal	Astrophysical Journal
Volume	624
Issue number	1 II
DOIs	https://doi.org/10.1086/430421
State	Published - May 1 2005

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

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10.1086/430421

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title = "Evidence of a starburst within 9 parsecs of the active nucleus of NGC 1097",

abstract = "We report evidence of a recent burst of star formation located within 9 pc of the active nucleus of NGC 1097. The observational signatures of the starburst include UV absorption lines and continuum emission from young stars observed in a small-aperture Hubble Space Telescope spectrum. The burst is ≤ a few × 106 yr old, has a mass of ∼106 M ⊙, an observed luminosity of 1.5 × 107 L ⊙, and is obscured by Av ≈ 3 mag. The importance of this finding is twofold: (1) the proximity of the starburst to the active nucleus and thus its possible association with it, and (2) its obscuration by and apparent association with a dusty absorbing medium, while the broad emission lines appear unobscured, suggesting that the starburst could be embedded in a circumnuclear torus as predicted in the unified model of active galactic nuclei.",

author = "T. Storchi-Bergmann and Nemmen, {R. S.} and Spinelli, {P. F.} and M. Eracleous and Wilson, {A. S.} and Filippenko, {A. V.} and M. Livio",

note = "Funding Information: We acknowledge valuable discussions with E. Bica, C. Bo-natto, G. Kriss, C. Leitherer, and P. Hall. We thank K. Leighly for providing the Fe II spectrum and the referee for valuable suggestions. This work was supported by NASA grant GO-08684 from the Space Telescope Science Institute, which is operated by AURA, Inc., under NASA contract NAS 5-26555, and the Brazilian institutions CNPq, CAPES, and FAPERGS. A. V. Filippenko is grateful for a Miller Research Professorship at UC Berkeley, and M. Eracleous and A. S. Wilson acknowledge support from NASA LTSA grants NAG5-10817 and NAG5-13065, respectively.",

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T1 - Evidence of a starburst within 9 parsecs of the active nucleus of NGC 1097

AU - Storchi-Bergmann, T.

AU - Nemmen, R. S.

AU - Spinelli, P. F.

AU - Eracleous, M.

AU - Wilson, A. S.

AU - Filippenko, A. V.

AU - Livio, M.

N1 - Funding Information: We acknowledge valuable discussions with E. Bica, C. Bo-natto, G. Kriss, C. Leitherer, and P. Hall. We thank K. Leighly for providing the Fe II spectrum and the referee for valuable suggestions. This work was supported by NASA grant GO-08684 from the Space Telescope Science Institute, which is operated by AURA, Inc., under NASA contract NAS 5-26555, and the Brazilian institutions CNPq, CAPES, and FAPERGS. A. V. Filippenko is grateful for a Miller Research Professorship at UC Berkeley, and M. Eracleous and A. S. Wilson acknowledge support from NASA LTSA grants NAG5-10817 and NAG5-13065, respectively.

PY - 2005/5/1

Y1 - 2005/5/1

N2 - We report evidence of a recent burst of star formation located within 9 pc of the active nucleus of NGC 1097. The observational signatures of the starburst include UV absorption lines and continuum emission from young stars observed in a small-aperture Hubble Space Telescope spectrum. The burst is ≤ a few × 106 yr old, has a mass of ∼106 M ⊙, an observed luminosity of 1.5 × 107 L ⊙, and is obscured by Av ≈ 3 mag. The importance of this finding is twofold: (1) the proximity of the starburst to the active nucleus and thus its possible association with it, and (2) its obscuration by and apparent association with a dusty absorbing medium, while the broad emission lines appear unobscured, suggesting that the starburst could be embedded in a circumnuclear torus as predicted in the unified model of active galactic nuclei.

AB - We report evidence of a recent burst of star formation located within 9 pc of the active nucleus of NGC 1097. The observational signatures of the starburst include UV absorption lines and continuum emission from young stars observed in a small-aperture Hubble Space Telescope spectrum. The burst is ≤ a few × 106 yr old, has a mass of ∼106 M ⊙, an observed luminosity of 1.5 × 107 L ⊙, and is obscured by Av ≈ 3 mag. The importance of this finding is twofold: (1) the proximity of the starburst to the active nucleus and thus its possible association with it, and (2) its obscuration by and apparent association with a dusty absorbing medium, while the broad emission lines appear unobscured, suggesting that the starburst could be embedded in a circumnuclear torus as predicted in the unified model of active galactic nuclei.

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Evidence of a starburst within 9 parsecs of the active nucleus of NGC 1097

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