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Distance moduli are most commonly used when expressing the distance to other galaxies in the relatively nearby universe.For example, the Large Magellanic Cloud (LMC) is at a distance modulus of 18.5, [2] the Andromeda Galaxy's distance modulus is 24.4, [3] and the galaxy NGC 4548 in the Virgo Cluster has a DM of 31.0. [4]
NGC 1427A, also known as ESO 358-49 [3], or ESO 358- G 049 [4], is an irregular galaxy in the constellation Fornax.Its distance modulus has been estimated using the globular cluster luminosity function to be 31.01 ± 0.21 which is about 52 Mly. [2]
The observed group is then shifted in the vertical direction, until the two main sequences overlap. The difference in magnitude that was bridged in order to match the two groups is called the distance modulus and is a direct measure for the distance (ignoring extinction).
Assuming an absolute magnitude of +0.5 V for RR Lyrae the apparent modulus of the Draco Dwarf is 19.58 m−M. [7] Using a reddening value towards Draco Dwarf of 0.03 ± 0.01 [5] we get a true distance modulus of 19.55. ^ Using the distance modulus formula of 1 × 10 (0.2 * 19.55 + 1) we get an RR Lyrae estimated distance of 81 kpc.
Distance measures are used in physical cosmology to give a natural notion of the distance between two objects or events in the universe.They are often used to tie some observable quantity (such as the luminosity of a distant quasar, the redshift of a distant galaxy, or the angular size of the acoustic peaks in the cosmic microwave background (CMB) power spectrum) to another quantity that is ...
NGC 3198, also known as Herschel 146 [5] is a barred spiral galaxy in the constellation Ursa Major.It was discovered by William Herschel on 15 January 1788. [6] [3] NGC 3198 is located in the Leo Spur, [3] which is part of the Virgo Supercluster, [7] and is approximately 47 million light years away.
In mathematics, the modulus of convexity and the characteristic of convexity are measures of "how convex" the unit ball in a Banach space is. In some sense, the modulus of convexity has the same relationship to the ε - δ definition of uniform convexity as the modulus of continuity does to the ε - δ definition of continuity .
In mathematics, the magnitude or size of a mathematical object is a property which determines whether the object is larger or smaller than other objects of the same kind. . More formally, an object's magnitude is the displayed result of an ordering (or ranking) of the class of objects to which it bel