Other discussions are indicating that 'science' may not be the correct tag for this site. What should it be tagged with?
Recreation would be the best place for it. Professionals can easily, and frequently do, join recreational groups related to their profession, but if we labeled it as
Professional then it would cut off a huge potential audience, and I think that would kill the site before it even gets off the ground.
If you can do multiple tags, then I'd do
I run a LinkedIn group called Aviation Professionals. It has over 114,000 members in it at the moment and growing by 150-200 members per day
The word professional attracts people, no question. A lot of the input is generated by people joining the group because they want access to professionals to discuss career changes, ask technicnal questions, etc
A recreational tag will attract some professionals, but it is more likely that a professionals tag will attract a lot of people who are not professional and want access to a professional source of information, thus increasing membership numbers, question quality, etc