Post Your Answer
3 years ago in Astrophysics , StellarDynamics By Shabana
Is there a difference between the merging of two stars and the coalescence of two stars?
I'm writing a literature review on binary star evolution and I see both terms used, sometimes seemingly interchangeably. However, in fluid dynamics, 'coalescence' implies a gentler union. In our field, does 'merging' specifically imply a more violent, dynamical event with mass ejection, while 'coalescence' suggests a slower, stable mass transfer?
Â
All Answers (1 Answers In All)
By Nitin Answered 3 years ago
This is an excellent point of terminology. In my experience with simulation papers, a distinction is often implied, though it's not always strict. 'Merging' typically describes a rapid, dynamical event driven by orbital instability, often leading to dramatic outcomes like a luminous red nova or a Thorne-?ytkow object. 'Coalescence,' meanwhile, frequently describes the slower, stable phase of contact binary evolution or the final inspiral due to gravitational radiation. Think of merging as a collision and coalescence as a gradual blending. However, I've seen many authors use them interchangeably, so always check the paper's specific context.
Â
Reply to Nitin
Related Questions