How many Twitter accounts are too many (given that my website speaks to multiple audiences)?

OOIR (at https://ooir.org ) lists the current research trends in various scientific disciplines.

Using a specific taxonomy, the research areas -- and thus, my website -- are divided into 17 "fields" (like Chemistry, Philosophy, or Social Sciences) and hundreds of "(sub-)disciplines" (like Zoology, Software Engineering, or Classical Literature).

The coverage of so many scientific disciplines is a very recent move. Before that, OOIR had focused mainly on political science, thus having a single, clearly demarcated audience.

Unsurprisingly, most of my followers on Twitter are social scientists (https://twitter.com/ObserveIR).

Now with the expansion, my audience seems to dissipate. A historian is not interested in chemistry, and a physicist not in linguistics - - so I was wondering whether I should create various Twitter accounts to cater to multiple distinct audiences.

For instance, one Twitter account for psychology, one Twitter account for chemistry, one Twitter account for computer science, etc. But this may become too much of a burden given that I am working on OOIR alone as a side-project (only to generate enough ad-based income for some coffee :-), not interested in profits).

If anyone has any experience or suggestions to share with regards to the social media strategy of websites that speak to multiple distinct audiences, I would be grateful to read about them!