Resolving the nuclear dust distribution of the Seyfert 2 galaxy NGC 3081
| العنوان: | Resolving the nuclear dust distribution of the Seyfert 2 galaxy NGC 3081 |
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| المؤلفون: | Almeida, C. Ramos, Sanchez-Portal, M., Perez-Garcia, A. M., Acosta-Pulido, J. A., Castillo, M., Ramos, A. Asensio, Gonzalez-Serrano, J. I., Alonso-Herrero, A., Espinosa, J. M. Rodriguez, Hatziminaoglou, E., Coia, D., Valtchanov, I., Povic, M., Esquej, P., Packham, C., Altieri, B. |
| المساهمون: | Universidad de Cantabria, Ministerio de Ciencia e Innovación (España), Junta de Andalucía |
| المصدر: | Monthly Notices of the Royal Astronomical Society: Letters 2011, 417, L46-L50 Digital.CSIC. Repositorio Institucional del CSIC instname |
| بيانات النشر: | Oxford University Press, 2011. |
| سنة النشر: | 2011 |
| مصطلحات موضوعية: | Seyfert [Galaxies], Cosmology and Nongalactic Astrophysics (astro-ph.CO), Galaxies: Seyfert, active [Galaxies], NGC 3081, Astrophysics::High Energy Astrophysical Phenomena, Seyfert – infrared, FOS: Physical sciences, Individual, Galaxies: active, Astrophysics::Cosmology and Extragalactic Astrophysics, Infrared: galaxies, Galaxies, Active – galaxies, galaxies [Infrared], individual: NGC 3081 [Galaxies], nuclei [Galaxies], Galaxies – galaxies, Astrophysics::Solar and Stellar Astrophysics, Galaxies: individual: NGC 3081, Astrophysics::Earth and Planetary Astrophysics, Astrophysics::Galaxy Astrophysics, Nuclei – galaxies, Galaxies: nuclei, Astrophysics - Cosmology and Nongalactic Astrophysics |
| الوصف: | We report far-infrared (FIR) imaging of the Seyfert 2 galaxy NGC 3081 in the range 70–500 μm, obtained with an unprecedented angular resolution, using the Herschel Space Observatory instruments PACS and SPIRE. The 11 kpc (∼70 arcsec) diameter star-forming ring of the galaxy appears resolved up to 250 μm. We extracted IR (1.6–500 μm) nuclear fluxes, that is active nucleus-dominated fluxes, and fitted them with clumpy torus models, which successfully reproduce the FIR emission with small torus sizes. Adding the FIR data to the near- and mid-IR spectral energy distribution (SED) results in a torus radial extent of Ro= 4+2− 1 pc, as well as in a flat radial distribution of the clouds (i.e. the q parameter). At wavelengths beyond 200 μm, cold dust emission at T= 28 ± 1 K from the circumnuclear star-forming ring of 2.3 kpc (∼15 arcsec) in diameter starts making a contribution to the nuclear emission. The dust in the outer parts of the galaxy is heated by the interstellar radiation field (19 ± 3 K). CRA acknowledges financial support from STFC (ST/G001758/1) and from the Spanish Ministry of Science and Innovation (MICINN) through project Consolider-Ingenio 2010 Programme grant CSD2006-00070: First Science with the GTC. AMPG and JIGS acknowledge the Spanish Ministry of Science and Innovation (MICINN) through project AYA2008-06311-C02-01/02. AAR acknowledges the Spanish Ministry of Science and Innovation through projects AYA2010-18029 (Solar Magnetism and Astrophysical Spectropolarimetry). AAH and PE acknowledges support from the Spanish Plan Nacional de Astronomía y Astrofísica under grant AYA2009-05705-E. MP acknowledges Junta de Andalucía and Spanish Ministry of Science and Innovation through projects PO8-TIC-03531 and AYA2010-15169. PACS has been developed by a consortium of institutes led by MPE (Germany) and including UVIE (Austria); KU Leuven, CSL, IMEC (Belgium); CEA, LAM (France); MPIA (Germany); INAF-IFSI/OAA/OAP/OAT, LENS, SISSA (Italy); IAC (Spain). This development has been supported by the funding agencies BMVIT (Austria), ESA-PRODEX (Belgium), CEA/CNES (France), DLR (Germany), ASI/INAF (Italy) and CICYT/MCYT (Spain). SPIRE has been developed by a consortium of institutes led by Cardiff University (UK) and including University of Lethbridge (Canada); NAOC (China); CEA, LAM (France); IFSI, University of Padua (Italy); IAC (Spain); Stockholm Observatory (Sweden); Imperial College London, RAL, UCL-MSSL, UKATC, University of Sussex (UK); and Caltech, JPL, NHSC, University of Colorado (USA). This development has been supported by national funding agencies: CSA (Canada); NAOC (China); CEA, CNES, CNRS (France); ASI (Italy);MCINN (Spain); SNSB (Sweden); STFC (UK) andNASA(USA). |
| اللغة: | English |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::131871bf0787d9fbc873ec61f1431de2 https://hdl.handle.net/10902/27025 |
| Rights: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....131871bf0787d9fbc873ec61f1431de2 |
| قاعدة البيانات: | OpenAIRE |
| الوصف غير متاح. |