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Tagged with absolute-magnitude redshift
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E(B-V) , the color excess between B and V bands, for galaxy at redshift 0
Following Mo et al. 2010 (page 479), the quantity $E(B-V)$, called the color excess between B and V bands, is equal to:
$$E(B-V) = A_B - A_V = (B - V) - (B - V)_0 = (m_B - m_V) - (M_B- M_V)$$
where $...
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When calculating absolute magnitudes of distant objects, do you use the light-travel distance or the comoving distance?
I want to calculate the absolute magnitude of GN-z11. Its light-travel distance is 13.4 billion ly (4.1 Gpc), its comoving distance is 32 billion ly (9.8 Gpc), and its apparent magnitude is $25.8$. ...
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