Spectroscopy monitoring of active galactic nuclei from CTIO. I. NGC 3227
dc.contributor.author | Winge, Claudia | pt_BR |
dc.contributor.author | Peterson, Bradley M. | pt_BR |
dc.contributor.author | Horne, Keith | pt_BR |
dc.contributor.author | Pogge, Richard William | pt_BR |
dc.contributor.author | Pastoriza, Miriani Griselda | pt_BR |
dc.contributor.author | Storchi-Bergmann, Thaisa | pt_BR |
dc.date.accessioned | 2015-01-08T02:13:10Z | pt_BR |
dc.date.issued | 1995 | pt_BR |
dc.identifier.issn | 0004-637X | pt_BR |
dc.identifier.uri | http://hdl.handle.net/10183/108845 | pt_BR |
dc.description.abstract | The results of a five-month monitoring campaign on the Seyfert 1.5 galaxy NGC 3227 are presented. Variability was detected in the continuum and in the broad emission lines. Cross correlations of the 4200 Å continuum light curve with the Hβ and He II λ4686 emission-line light curves indicate delays of 18 ± 5 and 16 ± 2 days, respectively, between the continuum variations and the response of the lines. We apply a maximum entropy method to solve for the transfer function that relates the Hβ and He II λ4686 lines and 4200 Å continuum variability and the result of this analysis suggests that there is a deficit of emission-line response due to gas along the line of sight to the continuum source for both lines. Using a composite off-nuclear spectrum, we synthesize the bulge stellar population, which is found to be mainly old (77% with age > 10 Gyr) with a metallicity twice the solar value. The synthesis also yields an internal color excess E(B−V) ≈0.04. The mean contribution of the stellar population to the inner 5" x 10" spectra during the campaign was ~40% . | pt_BR |
dc.format.mimetype | application/pdf | pt_BR |
dc.language.iso | eng | pt_BR |
dc.relation.ispartof | The astrophysical journal. Chicago. Vol. 445, no. 2, pt. 1 (June 1995), p. 680-690 | pt_BR |
dc.rights | Open Access | en |
dc.subject | Galaxies: individual (NGC 3227) | en |
dc.subject | Galaxias seyfert | pt_BR |
dc.subject | Galaxies: seyfert | en |
dc.subject | Espectros astronômicos | pt_BR |
dc.subject | Galaxies : stellar content | en |
dc.subject | Galáxia NGC 3227 | pt_BR |
dc.subject | Interior estelar | pt_BR |
dc.title | Spectroscopy monitoring of active galactic nuclei from CTIO. I. NGC 3227 | pt_BR |
dc.type | Artigo de periódico | pt_BR |
dc.identifier.nrb | 000262671 | pt_BR |
dc.type.origin | Estrangeiro | pt_BR |
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