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dc.rights.license© ESO 2020-
dc.contributor.authorAlonso Herrero, A.-
dc.contributor.authorPereira Santaella, M.-
dc.contributor.authorRigopoulou, D.-
dc.contributor.authorGarcía Bernete, I.-
dc.contributor.authorGarcía Burillo, S.-
dc.contributor.authorDomínguez Fernández, A. J.-
dc.contributor.authorCombes, F.-
dc.contributor.authorDavies, R. I.-
dc.contributor.authorDíaz Santos, T.-
dc.contributor.authorEsparza Borges, E.-
dc.contributor.authorGonzález Martín, O.-
dc.contributor.authorHernán Caballero, A.-
dc.contributor.authorHicks, E. K. S.-
dc.contributor.authorHönig, S. F.-
dc.contributor.authorLevenson, N. A.-
dc.contributor.authorRamos Almeida, C.-
dc.contributor.authorRoche, P. F.-
dc.contributor.authorRosario, D.-
dc.date.accessioned2021-04-09T10:24:24Z-
dc.date.available2021-04-09T10:24:24Z-
dc.date.issued2020-07-07-
dc.identifier.citationAstronomy and Astrophysics 639: A43 (2020)es
dc.identifier.issn0004-6361-
dc.identifier.otherhttps://www.aanda.org/articles/aa/abs/2020/07/aa37642-20/aa37642-20.html-
dc.identifier.urihttp://hdl.handle.net/20.500.12666/187-
dc.description.abstractWe investigate the relation between the detection of the 11.3 mu m polycyclic aromatic hydrocarbon (PAH) feature in the nuclear (similar to 24-230 pc) regions of 22 nearby Seyfert galaxies and the properties of the cold molecular gas. For the former we use ground-based (0.3-0.6 '' resolution) mid-infrared (mid-IR) spectroscopy. The cold molecular gas is traced by ALMA and NOEMA high (0.2-1.1 '') angular resolution observations of the CO(2-1) transition. Galaxies with a nuclear detection of the 11.3 mu m PAH feature contain more cold molecular gas (median 1.6x10(7) M-circle dot) and have higher column densities (N(H-2) = 2x10(23) cm(-2)) over the regions sampled by the mid-IR slits than those without a detection. This suggests that molecular gas plays a role in shielding the PAH molecules in the harsh environments of Seyfert nuclei. Choosing the PAH molecule naphthalene as an illustration, we compute its half-life in the nuclear regions of our sample when exposed to 2.5 keV hard X-ray photons. We estimate shorter half-lives for naphthalene in nuclei without a 11.3 mu m PAH detection than in those with a detection. The Spitzer/IRS PAH ratios on circumnuclear scales (similar to 4 ''similar to 0.25-1.3 kpc) are in between model predictions for neutral and partly ionized PAHs. However, Seyfert galaxies in our sample with the highest nuclear H-2 column densities are not generally closer to the neutral PAH tracks. This is because in the majority of our sample galaxies, the CO(2-1) emission in the inner similar to 4 '' is not centrally peaked and in some galaxies traces circumnuclear sites of strong star formation activity. Spatially resolved observations with the MIRI medium-resolution spectrograph on the James Webb Space Telescope will be able to distinguish the effects of an active galactic nucleus (AGN) and star formation on the PAH emission in nearby AGN.es
dc.description.sponsorshipWe thank an anonymous referee for providing comments that helped improve the paper. We are grateful to J. A. Fernandez Ontiveros for providing us with ALMA measurements for two galaxies in our sample prior to publication. AA-H and SG-B acknowledge support through grant PGC2018094671-B-I00 (MCIU/AEI/FEDER,UE). AA-H and MP-S work was done under project No. MDM-2017-0737 Unidad de Excelencia "Maria de Maeztu"Centro de Astrobiologia (INTA-CSIC). MPS acknowledges support from the Comunidad de Madrid, Spain, through Atraccion de Talento Investigador Grant 2018-T1/TIC-11035. DRi acknowledges support from the University of Oxford John Fell Fund. DRi and IGB acknowledge support from STFC through grant ST/S000488/1. CRA and SGB acknowledge support from grant AYA201676682-C3-2-P (MCIU/AEI/FEDER,UE). TDS acknowledges support from the CASSACA and CONICYT fund CAS-CONICYT Call 2018. DE-A acknowledges support from a CONACYT scholarship. DE-A and OG-M acknowledge support from UNAM PAPIIT project IA103118. OG-M acknowledge financial support of the UNAM PAPIIT project IN105720. SFH was supported by the EU Horizon 2020 framework program via the ERC Starting Grant DUST-INTHE-WIND (ERC-2015-StG-677117). CRA also acknowledges support from the Spanish Ministry of Science, Innovation and Universities under grant with reference RYC-2014-15779. DRo acknowledges the support of the UK Science and Technology Facilities Council (STFC) through grant ST/L00075X/1. This paper makes use of the following ALMA data: listed in Table 3. ALMA is a partnership of ESO (representing its member states), NSF (USA) and NINS (Japan), together with NRC (Canada), MOST and ASIAA (Taiwan), and KASI (Republic of Korea), in cooperation with the Republic of Chile. The Joint ALMA Observatory is operated by ESO, AUI/NRAO and NAOJ. This work is based on observations carried out under project numbers listed in Table 3 with the IRAM NOEMA Interferometer. IRAM is supported by INSU/CNRS (France), MPG (Germany) and IGN (Spain). This work is based [in part] on archival data obtained with the Spitzer Space Telescope, which is operated by the Jet Propulsion Laboratory, California Institute of Technology under a contract with NASA. Support for this work was provided by NASA. This research has made use of the NASA/IPAC Extragalactic Database (NED), which is operated by the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration.es
dc.language.isoenges
dc.publisherEDP Scienceses
dc.relationinfo:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PGC2018-094671-B-I00/ES/EVOLUCION DE GALAXIAS Y SUS AGUJEROS NEGROS CON ALTA RESOLUCION ESPACIAL: FEEDBACK, EL TORO Y FORMACION ESTELAR/-
dc.relationinfo:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/AYA2016-76682-C3-2-P/ES/ALIMENTACION, RETROALIMENTACION Y OSCURECIMIENTO EN GALAXIAS ACTIVAS/-
dc.relationinfo:eu-repo/grantAgreement/MINECO//RYC-2014-15779/ES/RYC-2014-15779/-
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International*
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.subjectGalaxies: seyfertes
dc.subjectGalaxies: nucleies
dc.subjectGalaxies: ISMes
dc.subjectRadio lines: galaxieses
dc.titleCold molecular gas and PAH emission in the nuclear and circumnuclear regions of Seyfert galaxieses
dc.typeinfo:eu-repo/semantics/articlees
dc.contributor.orcid0000-0001-8353-649X-
dc.contributor.orcid0000-0003-0699-6083-
dc.contributor.orcid0000-0002-0001-3587-
dc.contributor.orcid0000-0002-8524-8413-
dc.contributor.orcid0000-0003-4949-7217-
dc.contributor.orcid0000-0002-6353-1111-
dc.identifier.doi10.1051/0004-6361/202037642-
dc.identifier.e-issn1432-0746-
dc.contributor.funderAgencia Estatal de Investigación (AEI)-
dc.contributor.funderComunidad de Madrid-
dc.contributor.funderScience and Technology Facilities Council (STFC)-
dc.contributor.funderUniversidad Nacional Autónoma de México (UNAM)-
dc.contributor.funderEuropean Research Council (ERC)-
dc.contributor.funderNational Aeronautics and Space Administration (NASA)-
dc.description.peerreviewedPeer reviewes
dc.type.hasVersioninfo:eu-repo/semantics/publishedVersion-
dc.rights.accessRightsinfo:eu-repo/semantics/openAccess-
dc.type.coarhttp://purl.org/coar/resource_type/c_6501-
dc.relation.projectIDinfo:eu-repo/grantAgreement/EC/H2020/677117-
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