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http://inaoe.repositorioinstitucional.mx/jspui/handle/1009/2444| Variability study of the Hβ emission line in the blazar PKS 1510-089 | |
| Alfredo Amador-Portes | |
| Vahram Chavushyan Víctor Manuel Patiño-Álvarez | |
| Acceso Abierto | |
| Atribución-NoComercial-SinDerivadas | |
| Active Galactic Nuclei Blazars Jet Flat-Spectrum Radio Quasars Multi-wavelength Monitoring | |
| Blazars are a type of active galactic nucleus (AGN) characterized by their intense and variable emissions across the electromagnetic spec- trum, from radio to -rays. Blazars distinguish themselves from other types of AGNs by their jet orientation, which is close to the observer’s line of sight. Their emission is usually dominated by non-thermal ra- diation and rapid variability. Blazars are divided into two sub-types: flat spectrum radio quasars (FSRQs) and BL Lacertae objects (BL Lacs), based on the presence or absence of strong emission lines in their spectra. The -ray emission in blazars is traditionally attributed to Inverse Compton scattering (IC), with FSRQs being dominated by external inverse Compton (EC) while BL Lacs are dominated by syn- chrotron self-Compton (SSC). The source of interest in this work is the FSRQ, PKS 1510-089, located at z = 0.36, this blazar is one of the most active blazar in -rays, showing regular flare-like events across sev- eral wavelengths. This work studies this variability for over 10 years of -rays, X-rays, H emission line, continuum at 5100 Å, V-band, J-band, 1 mm, 15 GHz, and the Non-Thermal Dominance (NTD) pa- rameter. In this period, correlations and delays were found between these bands with the help of 3 different cross-correlations methods. The results were in general agreement with previous works, and unlike this work, none of those carried out such a detailed correlation analysis. The delays paint a general scenario where the jet is the dom- inant emission region through the flare-like events, while the high en- ergy emission is due to IC. The delays between the radio and millime- ter light curves are consistent with synchrotron emission from the jet, indicating synchrotron cooling. The delays between the optical and NIR light curves (continuum, V-band, J-band, and NTD) are found to be consistent with zero, suggesting quasi-simultaneous emission and co-spatiallity of the emitting regions. The dominant emission from the jet contributes to the variability and higher values of NTD and then the optical emission regions are inferred to be located within the jet and produced by synchrotron emission. The delay between optical and -rays emissions is approximately 7 days, this small delay points toward SSC as the dominant -ray emission mechanism. The delay between the continuum and the H emission line provides an esti- mate of the broad-line region (BLR) size. | |
| Instituto Nacional de Astrofísica, Óptica y Electrónica | |
| 2023-08 | |
| Tesis de maestría | |
| Inglés | |
| Estudiantes Investigadores Público en general | |
| Amador Portes, A., (2023),Variability study of the Hβ emission line in the blazar PKS 1510-089, Tesis de Maestría, Instituto Nacional de Astrofísica, Óptica y Electrónica. | |
| ASTRONOMÍA Y ASTROFÍSICA | |
| Versión aceptada | |
| acceptedVersion - Versión aceptada | |
| Aparece en las colecciones: | Maestría en Astrofísica |
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| AMADORPA_MA.pdf | 12.03 MB | Adobe PDF | Visualizar/Abrir |