Blue stragglers and friends: Stellar interactions in star clusters скачать в хорошем качестве

Blue stragglers and friends: Stellar interactions in star clusters

Talk by Dr. Vikrant Jadhav Interacting binary evolutionary products are ubiquitous in cluster environments. This talk presents an overview of recent observational progress on blue stragglers and related post-interaction systems, including blue lurkers, yellow stragglers, and extremely low-mass white dwarfs. These objects trace alternative evolutionary pathways and occupy regions of the Hertzsprung–Russell diagram that are inaccessible to single stars, reflecting a diversity of mass-transfer histories and evolutionary states in cluster environments. Multiwavelength observations, particularly in the ultraviolet, have proven to be powerful tools for identifying compact companions and constraining the present-day binarity and origins of these systems. In combination, time-series photometry and spectroscopic follow-up provide the most direct means of measuring their fundamental parameters and extending insights from cluster populations to analogous systems in the field.