| Name: | Broja G Dutta |
| Affiliation: | RBC College, WB State University |
| Conference ID : | ASI2023_403 |
| Title : | The origin of X-ray time lag in Black Hole Transients and AGN: an implication on to accretion dynamics |
| Authors : | Broja G Dutta,
Department of Physics, RBC College (WB State University), Kolkata, India;
Soumen Mondal,
S N Bose National Centre for Basic Sciences, Kolkata, India;
|
| Mode of Presentation: | Poster |
| Abstract Category : | Stars, ISM and Galaxy |
| Abstract : | The time lag properties are important because it gives a model-independent view of accretion dynamics. The time lag properties are inclination dependent, and the origin of time lag is difficult due to the presence of non-linear physical processes contributing to the time lag. We attempted various Galactic black hole transients (high and low inclination sources) and bare-type AGN. We have calculated the X-ray time delay/lag between the different energy bands. We have studied the various spectral parameters such as the size of the Compton cloud, accretion rate, temperature of the electron cloud, and optical depth using various phenomenological and physical models. We find that the time lag changes sign for both types of sources when the accretion rate varies, and a similar variation of comptonizing region is observed from delay/lag for both types of source. We concluded that the origin of time lag/delay delays could be satisfactorily explained by considering the Comptonization, reflection, light-crossing time (i,e., an inclination of the source and focusing), and the effect of outflows/Jets mechanisms for both the transients and AGN sources. |
