Near- to mid-infrared imaging and spectroscopy of two buried AGNs of the nearby merging galaxy NGC 6240 with Subaru/IRCS plus AO and GTC/CanariCam

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dc.contributor.authorMori, Tamami I.
dc.contributor.authorImanishi, Masatoshi
dc.contributor.authorAlonso-Herrero, Almudena
dc.contributor.authorPackham, Chris
dc.contributor.authorAlmeida, Cristina Ramos
dc.contributor.authorNikutta, Robert
dc.contributor.authorGonzalez-Martin, Omaira
dc.contributor.authorPerlman, Eric
dc.contributor.authorSaito, Yuriko
dc.contributor.authorLevenson, Nancy A.
dc.date.accessioned2025-01-23T21:40:53Z
dc.date.available2025-01-23T21:40:53Z
dc.date.issued2014
dc.description.abstractWe report near-infrared K', L', and M' band imaging observations of the nearby merging galaxy NGC 6240 with the Infrared Camera and Spectrograph on the Subaru telescope. The observations were performed with the assistance of the Subaru Adaptive Optics System, and the achieved spatial resolutions were around 0 ''.10-0 ''.20. We also obtained new mid-infrared imaging in the Si-2 filter band (8.7 mu m) and N-band (7.5-13 mu m) spectroscopy of this galaxy with the CanariCam on the Gran Telescopio Canarias with a spatial resolution of 0 ''.4-0 ''.5. In the K' band image the two nuclei of the galaxy each show a double peak suggesting the complex geometry of the source, while the L', M', and Si-2 band images show single compact structures in each of the two nuclei. Assuming that the center core observed at wavelengths longer than 3.8 mu m is associated with dust heated by the buried AGN, we re-evaluated the spectral energy distributions (SEDs) of the southern nucleus from 2 to 30 mu m with additional literature values, and performed the SED+spectroscopy fit using the clumpy torus models of Nenkova et al. (2008a, ApJ, 685, 145; 2008b, ApJ, 685, 160) and a Bayesian fitting approach. The model fit suggests that the high covering factor torus emission in the southern nucleus is also obscured by foreground dust in the host galaxy. The estimated AGN bolometric luminosity of the southern nucleus, L-bol(AGN) similar to 1 x 10(45) erg s(-1), accounts for approximately 40% of the whole luminosity of the system.
dc.fuente.origenWOS
dc.identifier.doi10.1093/pasj/psu068
dc.identifier.eissn2053-051X
dc.identifier.issn0004-6264
dc.identifier.urihttps://doi.org/10.1093/pasj/psu068
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/101631
dc.identifier.wosidWOS:000345780500011
dc.issue.numero5
dc.language.isoen
dc.revistaPublications of the astronomical society of japan
dc.rightsacceso restringido
dc.subjectgalaxies: active
dc.subjectgalaxies: nuclei
dc.subjectgalaxies: starburst
dc.subjectinfrared: galaxies
dc.titleNear- to mid-infrared imaging and spectroscopy of two buried AGNs of the nearby merging galaxy NGC 6240 with Subaru/IRCS plus AO and GTC/CanariCam
dc.typeartículo
dc.volumen66
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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