期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 439, 期 4, 页码 3847-3859出版社
OXFORD UNIV PRESS
DOI: 10.1093/mnras/stu235
关键词
instrumentation: high angular resolution; galaxies: active; galaxies: nuclei; galaxies: Seyfert; infrared: galaxies
资金
- Marie Curie Intra European Fellowship within the 7th European Community Framework Programme [PIEF-GA-2012-327934]
- Instituto de Astrofisica de Canarias
- Spanish Ministry of Science and Innovation (MICINN) [PN AYA2010-21887-C04.04]
- Spanish Plan Nacional de Astronomia y Astrofisica [AYA2009-05705-E]
- Augusto G. Linares Program through the Universidad de Cantabria
- Spanish MICINN [AYA2012-39168-C03-01]
- Spanish Ministry of Economy and Competitiveness [AYA2010-18029]
- Spanish Ministry of Economy and Competitiveness through project Consolider-Ingenio [CSD2009-00038]
- Ramon y Cajal fellowships
- National Aeronautics and Space Administration
- [NSF-0904421]
We present nuclear spectral energy distributions (SEDs) from 1 to 18 mu m of a small sample of nearby, nearly face-on and undisturbed Seyfert galaxies without prominent nuclear dust lanes. These nuclear SEDs probe the central similar to 35 pc of the galaxies, on average, and include photometric and spectroscopic infrared (IR) data. We use these SEDs, the clumpy torus models of Nenkova et al. and a Bayesian approach to study the sensitivity of different IR wavelengths to the torus parameters. We find that high angular resolution 8-13 mu m spectroscopy alone reliably constrains the number of clumps and their optical depth (N-0 and tau(V)). On the other hand, we need a combination of mid- and near-IR subarcsecond resolution photometry to constrain torus width and inclination, as well as the radial distribution of the clouds (Sigma, i and q). For flat radial profiles (q = 0, 1), it is possible to constrain the extent of the mid-IR-emitting dust within the torus (Y) when N-band spectroscopy is available, in addition to near-IR photometry. Finally, by fitting different combinations of average and individual Seyfert 1 and Seyfert 2 data, we find that, in general, for undisturbed, nearly face-on Seyferts without prominent nuclear dust lanes, the minimum combination of data necessary to reliably constrain all the torus parameters is J+K+M-band photometry + N-band spectroscopy.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据