@Article{PandaSant:2022:ReSpEn,
               author = "Panda, Swayamtrupta and Santos, Denimara Dias dos",
          affiliation = "{Polish Academy of Sciences} and {Instituto Nacional de Pesquisas 
                         Espaciais (INPE)}",
                title = "Revisiting the spectral energy distribution of I Zw 1 under the 
                         CaFe Project",
              journal = "Acta Astrophysica Taurica",
                 year = "2022",
               volume = "3",
               number = "1",
                pages = "27--34",
             keywords = "galaxies: active, (galaxies:) quasars: emission lines, galaxies: 
                         abundances, accretion, accretion disks,radiative transfer, 
                         methods: data analysis.",
             abstract = "The CaFe Project involves the study of the properties of the low 
                         ionization emission lines (LILs) pertaining to the broad-line 
                         region (BLR) in active galaxies. These emission lines, especially 
                         the singly-ionized iron (Fe ii) in the optical and the 
                         corresponding singly-ionized calcium (Ca ii) in the near infrared 
                         (NIR) are found to show a strong correlation in their emission 
                         strengths, i.e. with respect to the broad H\𝛽 emission 
                         line, the latter also belonging to the same category of LILs. The 
                         origin of this correlation is attributed to the similarity in the 
                         physical conditions necessary to emit these lines especially in 
                         terms of the strength of the ionization from the central continuum 
                         source and the local number density of available matter in these 
                         regions. In this paper, we focus on the issue of the spectral 
                         energy distribution (SED) characteristic to a prototypical Type-1 
                         Narrow-line Seyfert galaxy (NLS1) I Zw 1. We extract the continuum 
                         from quasi-simultaneous spectroscopic measurements ranging from 
                         the near-UV (\∼1200 Å) to the near infrared (\∼24000 
                         Å) to construct the SED and supplement it with archival X-ray 
                         measurements available for this source. Using the photoionization 
                         code CLOUDY, we assess and compare the contribution of the 
                         prominent Big Blue Bump seen in our SED versus the SED used in our 
                         previous work, wherein the latter was constructed from archival, 
                         multi-epoch photometric measurements. Following the prescription 
                         from our previous work, we constrain the physical parameter space 
                         to optimize the emission from these LILs and discuss the 
                         implication of the use of a better SED.",
                  doi = "10.31059/aat.vol3.iss1.pp27-34",
                  url = "http://dx.doi.org/10.31059/aat.vol3.iss1.pp27-34",
                 issn = "2712-925X",
                label = "lattes: 9302802998462635 2 PandaDias:2022:ReSpEn",
             language = "pt",
           targetfile = "28-Article Text-106-2-10-20220315.pdf",
        urlaccessdate = "05 jun. 2024"
}