| Name: | Dipanweeta Bhattacharyya |
| Affiliation: | Tata Institute of Fundamental Research (TIFR) Mumbai |
| Conference ID : | ASI2024_769 |
| Title : | $\chi_{\rm{eff}}$ distribution for binary black holes in star clusters |
| Authors : | Dipanweeta Bhattacharyya, Sourav Chatterjee |
| Authors Affiliation: | Dipanweeta Bhattacharyya, Sourav Chatterjee Affiliation (Eg. Tata Institute of Fundamental Research (TIFR) Mumbai 400005) |
| Mode of Presentation: | Oral |
| Abstract Category : | Stars, Interstellar Medium, and Astrochemistry in Milky Way |
| Abstract : | It is now well known that dense star clusters such as the globular clusters (GCs) are efficient factories of merging binary black holes (BHs) that can be detectable via gravitational wave observations by the LIGO-Virgo-Kagra (LVK) detectors. Using a large grid of GC models, created using one of the most advanced H\'enon-type Monte Carlo code CMC, we investigate the various interaction channels that can affect the spins of the merging BHs and as a result, influence the observable $\chi_{\rm{eff}}$ distribution as a function of pre-merger source-frame BH mass. We further investigate the relative importance of these various channels. For example, some of the mergers may contain BHs that had a previous merger with another BH, the so-called `next-generation.' Another source of pre-merger spin may be related to the detailed history of binary stellar evolution of the BHs including mass transfer and stellar mergers. We investigate the observable differences between the $\chi_{\rm{eff}}$ distributions of the first and next-generation binary BH mergers as a function of the cluster properties. In this presentation I will show our latest results and discuss its implications for LVK. |
