@article{10902/38454,
year = {2025},
month = {9},
url = {https://hdl.handle.net/10902/38454},
abstract = {We present the first optical-UV spectral systematic analysis of 30 Type 1 active galactic nuclei selected in the far-infrared and X-ray in the Lockman-SpReSO Survey. The sample of faint objects (mB = 19.6-21.8) covers a large redshift range of 0.33 >z > 4.97 with a high signal-to-noise ratio (-21 on average). A detailed spectral analysis based on the quasar main-sequence phenomenology prescription was applied to deblend the principal optical-UV emitting regions. Our sample spans a bolometric luminosity range of 44.85 < logLbol < 47.87, absolute B-magnitude of 20.46 >MB > -26.14, BH mass of 7.59 < logMBH < 9.80, and Eddington ratio of -1.70 < logREdd < 0.56. The analysis shows that 18 high-z objects correspond to Population (Pop) B, whereas three low-z fall in Pop A2, B1, and B1+. The remaining eight are candidates to be Pop B and one Pop A object. None of them is an extreme accretor. We looked for tendencies in our sample and compared them with other samples with different selection criteria. Evidence for winds was explored using the C ivL1549 line half-height centroid c(1/2), finding wind velocities between 941 and -1587 km s-1. This result is consistent with samples with similar ranges of z and MB. The Baldwin effect showed a slope of ?0.23 ± 0.03 dex consistent with previous studies. Spectra from 12 objects in our sample were found in the Sloan Digital Sky Survey Data Release 17 database. We applied the same methodology to compare them to our spectra, finding no evidence of variability.},
organization = {C.A.N. and H.J.I.M. thank the support of the CONAHCyT projects 2022–320020, CBF2023-2024-1418, and the DGAPA-UNAM grants IA104325 and IN111422. H.J.I.M. thanks the support from the CONAHCyT project CF-2023-G543. I.C.G. and E.B. acknowledge financial support from DGAPA-UNAM grant IN-119123 and CONAHCYT grant CF-2023-G-100. M.H.E. acknowledges support from CONAHCYT program Estancias Posdoctorales por México, Coordinación de apoyos a becarios e investigadores. M.C. acknowledges funds by grant PID2022-136598NB-C33 funded by MCIN/AEI/10.13039/501100011033 and by “ERDF A way of making Europe”. T.M., M.E.C., and M.H. E. thank the support from UNAM DGAPA PAPIIT IN 114423. H.M.H.T. acknowledges support from grants CF-G543 CONAHCYT and CF-2023-G-1052 CONAHCYT. M.S.P. acknowledges the support of the Spanish Ministry of Science, Innovation and Universities through the project PID-2021- 122544NB-C43. This work was supported by the Evolution of Galaxies project, of reference PID-2021-122544NB-C41 within the Programa estatal de fomento de la investigación científica y técnica de excelencia del Plan Estatal de Investigación Científica y Técnica y de Innovación of the Spanish Ministry of Science and Innovation/State Agency of Research MCIN/AEI. J.N. acknowledges the support of the National Science Centre, Poland through the SONATA BIS grant 2018/30/E/ST9/00208 and the support of the Polish National Agency for Academic Exchange (NAWA) Bekker grant BPN/BEK/2023/1/00271. This article is based on observations made with the Gran Telescopio Canarias at Roque de los Muchachos Observatory on the island of La Palma. Funding for SDSS IV has been provided by the Alfred P. Sloan Foundation, the Heising-Simons Foundation, the National Science Foundation, and the Participating Institutions. SDSS acknowledges support and resources from the Center for High-Performance Computing at the University of Utah. SDSS telescopes are located at Apache Point Observatory, funded by the Astrophysical Research Consortium and operated by New Mexico State University, and at Las Campanas Observatory, operated by the Carnegie Institution for Science. SDSS19 is managed by the Astrophysical Research Consortium for the Participating Institutions of the SDSS Collaboration, including Caltech, The Carnegie Institution for Science, Chilean National Time Allocation Committee (CNTAC) ratified researchers, The Flatiron Institute, the Gotham Participation Group, Harvard University, Heidelberg University, The Johns Hopkins University, L’Ecole polytechnique fédérale de Lausanne (EPFL), Leibniz-Institut für 19 https://www.sdss.org/ 11 The Astrophysical Journal, 990:216 (23pp), 2025 September 10 Negrete et al. Astrophysik Potsdam (AIP), Max-Planck-Institut für Astronomie (MPIA Heidelberg), Max-Planck-Institut für Extraterrestrische Physik (MPE), Nanjing University, National Astronomical Observatories of China (NAOC), New Mexico State University, The Ohio State University, Pennsylvania State University, Smithsonian Astrophysical Observatory, Space Telescope Science Institute (STScI), the Stellar Astrophysics Participation Group, Universidad Nacional Autónoma de México, University of Arizona, University of Colorado Boulder, University of Illinois at Urbana-Champaign, University of Toronto, University of Utah, University of Virginia, Yale University, and Yunnan University.},
publisher = {Institute of Physics Publishing},
publisher = {Astrophysical Journal, 2025, 990(2), 216},
title = {The Lockman-SpReSo project. Spectroscopic analysis of type 1 active galactic nuclei},
author = {Negrete, Castalia Alenka and Ibarra-Medel, Héctor J. and Benítez, Erika and Cruz-González, Irene and Krongold, Yair and González, J. Jesús and Cepa, Jordi and Padilla-Torres, Carmen and Cerviño, Miguel and Povic, Mirjana and Herrera-Endoqui, Martín and Jenaro-Ballesteros, Nancy and Miyaji, Takamitsu and Elías-Chávez, Mauricio and Sánchez-Portal, Miguel and Cedrés, Bernabé and Nadolny, Jakub and González-Otero, Mauro and Assefa, Bereket and González Serrano, José Ignacio},
}