The Role of the Most Luminous Obscured AGNs in Galaxy Assembly at z similar to 2

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dc.contributor.authorFarrah, Duncan
dc.contributor.authorPetty, Sara
dc.contributor.authorBlain, Andrew
dc.contributor.authorEfstathiou, Andreas
dc.contributor.authorLacy, Mark
dc.contributor.authorStern, Daniel
dc.contributor.authorLake, Sean
dc.contributor.authorJarrett, Tom
dc.contributor.authorBenford, Dominic
dc.contributor.authorTsai, Chao-Wei
dc.contributor.authorAssef, Roberto
dc.contributor.authorMoustakas, Leonidas
dc.date.accessioned2021-10-08T07:20:41Z
dc.date.available2021-10-08T07:20:41Z
dc.date.issued2017
dc.description.abstractWe present Hubble Space Telescope WFC3 F160W imaging and infrared spectral energy distributions for 12 extremely luminous, obscured active galactic nuclei (AGNs) at 1.8 < z < 2.7. selected via "hot, dust-obscured" mid-infrared colors. Their infrared luminosities span (2-15) x 10(13) L-circle dot, making them among the most luminous objects in the universe at z similar to 2. In all cases, the infrared emission is consistent with arising at least for the. most part from AGN activity. The AGN fractional luminosities are higher than those in either submillimeter galaxies. or AGNs selected via other mid-infrared criteria. Adopting the G, M-20, and A morphological parameters, together with traditional classification boundaries, infers that three-quarters of the sample are mergers. Our sample does not, however, show any correlation between the considered morphological parameters and either infrared luminosity or AGN fractional luminosity. Moreover, the asymmetries and effective radii of our sample are distributed identically to those of massive galaxies at z similar to 2. We conclude that our sample is not preferentially associated with mergers, though a significant merger fraction is still plausible. Instead, we propose that our sample includes. examples of the massive galaxy population at z similar to 2 that harbor a briefly luminous, "flickering" AGN. and in which the G and M-20 values have been perturbed. due to either the AGN. and/or the earliest formation stages of a bulge in an inside-out manner. Furthermore, we find that the mass assembly of the central black holes in our sample leads the mass assembly of any bulge component. Finally, we speculate that our sample represents. a small fraction of the immediate antecedents of compact star-forming galaxies at z similar to 2.
dc.identifier.apacitationFarrah, D., Petty, S., Blain, A., Efstathiou, A., Lacy, M., Stern, D., ... Moustakas, L. (2017). The Role of the Most Luminous Obscured AGNs in Galaxy Assembly at z similar to 2. <i>The Astrophysical Journal</i>, 844(2), 174 - 177. http://hdl.handle.net/11427/34982en_ZA
dc.identifier.chicagocitationFarrah, Duncan, Sara Petty, Andrew Blain, Andreas Efstathiou, Mark Lacy, Daniel Stern, Sean Lake, et al "The Role of the Most Luminous Obscured AGNs in Galaxy Assembly at z similar to 2." <i>The Astrophysical Journal</i> 844, 2. (2017): 174 - 177. http://hdl.handle.net/11427/34982en_ZA
dc.identifier.citationFarrah, D., Petty, S., Blain, A., Efstathiou, A., Lacy, M., Stern, D., Lake, S. & Jarrett, T. et al. 2017. The Role of the Most Luminous Obscured AGNs in Galaxy Assembly at z similar to 2. <i>The Astrophysical Journal.</i> 844(2):174 - 177. http://hdl.handle.net/11427/34982en_ZA
dc.identifier.issn0004-637X
dc.identifier.issn1538-4357
dc.identifier.ris TY - Journal Article AU - Farrah, Duncan AU - Petty, Sara AU - Blain, Andrew AU - Efstathiou, Andreas AU - Lacy, Mark AU - Stern, Daniel AU - Lake, Sean AU - Jarrett, Tom AU - Benford, Dominic AU - Tsai, Chao-Wei AU - Assef, Roberto AU - Moustakas, Leonidas AB - We present Hubble Space Telescope WFC3 F160W imaging and infrared spectral energy distributions for 12 extremely luminous, obscured active galactic nuclei (AGNs) at 1.8 < z < 2.7. selected via "hot, dust-obscured" mid-infrared colors. Their infrared luminosities span (2-15) x 10(13) L-circle dot, making them among the most luminous objects in the universe at z similar to 2. In all cases, the infrared emission is consistent with arising at least for the. most part from AGN activity. The AGN fractional luminosities are higher than those in either submillimeter galaxies. or AGNs selected via other mid-infrared criteria. Adopting the G, M-20, and A morphological parameters, together with traditional classification boundaries, infers that three-quarters of the sample are mergers. Our sample does not, however, show any correlation between the considered morphological parameters and either infrared luminosity or AGN fractional luminosity. Moreover, the asymmetries and effective radii of our sample are distributed identically to those of massive galaxies at z similar to 2. We conclude that our sample is not preferentially associated with mergers, though a significant merger fraction is still plausible. Instead, we propose that our sample includes. examples of the massive galaxy population at z similar to 2 that harbor a briefly luminous, "flickering" AGN. and in which the G and M-20 values have been perturbed. due to either the AGN. and/or the earliest formation stages of a bulge in an inside-out manner. Furthermore, we find that the mass assembly of the central black holes in our sample leads the mass assembly of any bulge component. Finally, we speculate that our sample represents. a small fraction of the immediate antecedents of compact star-forming galaxies at z similar to 2. DA - 2017 DB - OpenUCT DP - University of Cape Town IS - 2 J1 - The Astrophysical Journal LK - https://open.uct.ac.za PY - 2017 SM - 0004-637X SM - 1538-4357 T1 - The Role of the Most Luminous Obscured AGNs in Galaxy Assembly at z similar to 2 TI - The Role of the Most Luminous Obscured AGNs in Galaxy Assembly at z similar to 2 UR - http://hdl.handle.net/11427/34982 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/34982
dc.identifier.vancouvercitationFarrah D, Petty S, Blain A, Efstathiou A, Lacy M, Stern D, et al. The Role of the Most Luminous Obscured AGNs in Galaxy Assembly at z similar to 2. The Astrophysical Journal. 2017;844(2):174 - 177. http://hdl.handle.net/11427/34982.en_ZA
dc.language.isoeng
dc.publisher.departmentDepartment of Astronomy
dc.publisher.facultyFaculty of Science
dc.sourceThe Astrophysical Journal
dc.source.journalissue2
dc.source.journalvolume844
dc.source.pagination174 - 177
dc.source.urihttps://dx.doi.org/10.3847/1538-4357/aa78f2
dc.subject.othergalaxies: evolution
dc.subject.othergalaxies: high-redshift
dc.subject.othergalaxies: starburst
dc.subject.otherquasars: general
dc.titleThe Role of the Most Luminous Obscured AGNs in Galaxy Assembly at z similar to 2
dc.typeJournal Article
uct.type.publicationResearch
uct.type.resourceJournal Article
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