Sirius is a visual binary with a period of 49.94 yr. Its measured trigonometric parallax is 0.37921" (used to calculate the distance to the system) and, assuming that the plane of the orbit is the plane of the sky, the true angular extent of the semi-major axis of the reduced mass is 7.61" (needs to be converted to radians). The ratio of the distances of Sirius A and Sirius B from the center of mass is aa/aB=0.466. Find the masses of Sirius A and B.
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- Show work. For the following: A parsec is a distance equal to 3.26 light years. The speed of light is 2.998 x 10°m/s. A nght year is a unit of distance equal to the distance light travels in one year. The brightest star in the night sky is Sirius, (Not the radio station) is 2.63 parsecs away. (1km30.621miles, 365d-1yr) How many miles away is this star?An object was discovered on Feb. 24.37 UT (position R.A. = 5h35m.8, Decl. = -69 18'), obtained m = 4.8 on Feb. 24.454 UT. This object proved to be the most famous supernova (SN) in the 20th Century and the brightest visible from Earth since 1604. It is classified as a SN of the type Il in the Large Magellanic Cloud (SN1987A). Its brightness peaked in May 1987, with an apparent magnitude of m = 2.8. a) Find the absolute magnitude M of the SN1987A at maximum. Distance of the LMC is 51,400 pc. b) The progenitor (before SN explosion) star was a blue supergiant of the apparent magnitude m = 12.8. How much brighter (in terms of flux density) this SN was at maximum compared to the progenitor star. Find the ratio FSN/ EbetoreInternational Astronomical Union reported on 24 Feb 1987: An object was discovered on Feb. 24.37 UT (position R.A. = 5h35m.8, Decl. = -69 18'), obtained m = 4.8 on Feb. 24.454 UT. This object proved to be the most famous supernova (SN) in the 20th Century and the brightest visible from Earth since 1604. It is classified as a SN of the type Il in the Large Magellanic Cloud (SN1987A). Its brightness peaked in May 1987, with an apparent magnitude of m = 2.8. a) Find the absolute magnitude M of the SN1987A at maximum. Distance of the LMC is 51,400 pc. b) The progenitor (before SN explosion) star was a blue supergiant of the apparent magnitude m = 12.8. How much brighter (in terms of flux density) this SN was at maximum compared to the progenitor star. Find the ratio FSN / Ebefore
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