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An M2 III RSG has an absolute visual magnitude (MV ) of approximately −0.6. (a) If...

An M2 III RSG has an absolute visual magnitude (MV ) of approximately −0.6.

(a) If this star were located in the globular cluster Omega Centauri what would be its apparent V magnitude? You will need to look up the distance of Omega Centauri.

(b) What would be the expected parallax of the star in Omega Centauri?

(c) Assuminga relativetangential velocity of 100kms−1, what is theexpected proper motion (in arcseconds/year) of the star in Omega Centauri?

Science   Advanced-Physics   
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Answer #1

I have not done the MKS to Astronomical Unit transformation explicitly. You can derive the relation in part c very easily.

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