UseCase: ActiveStarID

PrimaryActor:

Astronomer

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EndResult:

A list of active stars for correlation with other parameters e.g. likely to exhibit radio emission and hence have proper motions measurable with VLBI, or for correlation with transient high-energy emission.

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OtherActors:

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PreConditions:

Astronomer defines active star.

1. This could be as simple as:
   1. Stellar classes containing active stars e.g. dMe
   2. Listing in catalogues of active stars
   3. Exclusion of unwanted types eg novae
2. or more complex, e.g.:
   1. Existing radio detections
   2. Further diagnostics for activity linked to radio emission (e.g. high energy emission, optical spectra).

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BasicAssumptions:

If using criteria involving comparing data from more than one catalogue or observation, these can be astrometrically aligned (see AstrometryBootstrap, SelectAstrometricStandards, SetImageWCS).

AlternativeFlows:

Find active stars not catalogued as such e.g.

1. Compare catalogues of appropriate spectra with stellar magnitude and broadly defined type (e.g. all M and K stars in spectral atlases, not classified as giants, above a certain magnitude) and analyse their spectra according to user-defined criteria.
2. Find stars also appearing in radio or high-energy catalogues

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KeyReferences:

Helfand, David J., Schnee, Scott, Becker, Robert H., White, Richard L., & McMahon, Richard G. 1999, The Astronomical Journal, Volume 117, Issue 3, pp. 1568-1577. The FIRST Unbiased Survey for Radio Stars

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GoodStyle: Please add comments below. This area should be used for refinement of the above document. If you want to ask questions or start a dialogue with the author, please use (or create) a topic in the Use Cases Forum.
Author: Once the refinements here and comments in the forum die down, perhaps you could rewrite the problem, incorporating the comments and refinements.

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-- AnitaRichards - 02 Mar 2002