2024-03-29T07:22:07Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/1105432016-12-19T11:37:42Zcom_10261_37com_10261_4col_10261_290
Investigating the sensitivity of observed spectral energy distributions to clumpy torus properties in Seyfert galaxies
Alonso-Herrero, A.
Levenson, N.
Asensio Ramos, A.
Rodríguez-Espinosa, J. M.
González-Martín, Omaira
Packham, Christopher
Martínez, M.
Ramos-Almeida, Cristina
European Commission
Ministerio de Ciencia e Innovación (España)
Instituto de Astrofísica de Canarias
Universidad de Cantabria
Ministerio de Economía y Competitividad (España)
Consejo Superior de Investigaciones Científicas (España)
National Aeronautics and Space Administration (US)
We present nuclear spectral energy distributions (SEDs) from 1 to 18 μm of a small sample of nearby, nearly face-on and undisturbed Seyfert galaxies without prominent nuclear dust lanes. These nuclear SEDs probe the central ~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 aBayesian approach to study the sensitivity of different IRwavelengths to the torus parameters.We find that high angular resolution 8-13 μm spectroscopy alone reliably constrains the number of clumps and their optical depth (N0 and Τ 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 (σ, 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. © 2014 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society.
2015-02-12T10:25:11Z
2015-02-12T10:25:11Z
2014
2015-02-12T10:25:12Z
artículo
Monthly Notices of the Royal Astronomical Society 439(4): 3847-3859 (2014)
http://hdl.handle.net/10261/110543
10.1093/mnras/stu235
http://dx.doi.org/10.13039/501100000780
http://dx.doi.org/10.13039/501100004837
http://dx.doi.org/10.13039/501100006365
http://dx.doi.org/10.13039/501100003329
http://dx.doi.org/10.13039/501100003339
http://dx.doi.org/10.13039/100000104
eng
Publisher's version
http://dx.doi.org/10.1093/mnras/stu235
info:eu-repo/grantAgreement/EC/FP7/327934
openAccess
Oxford University Press
Royal Astronomical Society