EXPLORATION OF X-RAY SCALING METHOD IN ACTIVE GALACTIC NUCLEI WITH HIGH ACCRETION RATE MRK 766 USING NUSTAR DATA

• Main Author: J. N., Jonathan
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/72679
• Institution: Institut Teknologi Bandung

Name/NIM: Jonathan J. Nandaputra/10318021 Final Project’s Title: Exploration of X-Ray Scaling Method in Active Galactic Nuclei with high accretion rate Mrk 766 using NuSTAR data The determination of the mass of a black hole in an Active Galactic Nuclei (AGN) is very important in providing basic characteristic constraints on the energy generation mechanism and growth of AGN, as well as the evolution of the galaxy in which the object is located. The method that is commonly used and considered accurate is the reverberation mapping method (RM method), a dynamic method that is highly dependent on the broad-line region component of an AGN. As a result of this limitation, it is important to explore other methods. This Final Project aims to explore an alternative mass determination method, namely the X-ray Scaling Method, for class NLS1 objects, an AGN subclass with a low black hole mass and high accretion rate. The object used is Mrk 766 which has two Xray data from the NuSTAR satellite with a black hole mass value (MBH) that has been determined using the RM method. NuSTAR data is processed based on the type of detector (FPMA and FPMB) so that it becomes four pieces of data. These four data are reduced to give an energy spectrum and then modeled with a simple model of (Tbabs(zTBabs(BMC+gaussian))). The BMC model is used to obtain NBMC and ? parameters from Mrk 766, the target object. The two parameter values from each of the four data points are then scaled to the S-curve (NBMC to ? diagram) of each reference object to obtain a comparison of the NBMC values between the target object and the reference. The reference objects used are GRO J1655- 40 R05, GRO J1655-40 D05, GX 339-4 D03, GX 339-4 R04, and XTE J1550-564 R98. The comparison value obtained is then multiplied by the mass value of the reference object and the square of the ratio of the distance (to the observer) of the target object to the reference. The resulting value is the MBH value of Mrk 766 based on the X-ray scaling method. The MBH value of the X-ray scaling method for Mrk 766 in this Final Project is (9.01?0.73 +0.73) × 106 M?. This value is within the range of RM method values for Mrk 766. Therefore, the X-ray scaling method has the potential as an alternative method to determine the black hole mass value of a high accretion rate AGN.