DISTANCE MODULUS Definition & Meaning

distance modulus

noun

astronomy a measure of the distance, r , of a celestial object too far away to show measurable parallax. It is given by m – M = 5 log( r /10), where m is its apparent magnitude (corrected for interstellar absorption) and M is its absolute magnitude

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For our adopted distance modulus and foreground reddening, this implies that any source at the position of AT 2017gfo must have an absolute magnitude F606W > −5.8.

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distance modulus

noun

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