An O8 V star has an apparent magnitude of +2. Use the method of spectroscopic parallax to estimate the distance to the star. (Hints: the figure below may be helpful.) (answer in parcecs) Spectral typeB1000R100RoBetelgeuse10610R.10Ro----Rigel AAntaresAlnilamDenebAdhara-5PolarisSpica ASupergiants1041RgSpica BCanopusArcturusMiraAldebaran ARigel BMain sequence-Саpella AСаpela BVegaSirius AGiants102Pollux0.1RAltair--Procyon ASunCentauri B0.01RoCAldebaran B1040 Eridani BSirius B. Wolf 134610-20.001RoBarnard's Star-------ReddwarfsWhite dwarfsProcyon B- Van Maanen's StarWolf 486102000Note: Star sizes are not to scalèe:3000500019,00030,00020,000Temperature (K)M.IL

The apparent magnitude m of the star is given to be m=+1. From HR absolute magnitude M of a star…

Answered: An O8 V star has an apparent magnitude…

Similar questions

Two stars-A and B, of luminosities 0.5 and 4.5 times the observed to have the luminosity of the Sun, respectively-are same apparent brightness. Which star is more distant, and how much farther away is it than the other?
Problem Set on Binary Systems: 1.Consider two stars in orbit about a mutual center of mass. If a1 is the semimajor axis of the orbit of star of mass m, and a, is the semimajor axis of the orbit of star of mass m2, prove that the semimajor axis of the orbit of the reduced mass is given by a = a, + a2. points)
Note: The answer should be typed. Asap
What is the total mass of a visual binary system if the average separation of the stars is 7.1 AU and their orbital period is 12 years?
I need the answer as soon as possible
Do this in 10 min. I will give like on answer
Suppose a protostar has a luminosity of 39,473 L⊙ and a surface temperature of 4,130 K (Kelvins). What is the radius of this protostar? [Enter your answer as a multiple of the Sun's radius. I.e., if you find R = 20 R⊙ , enter 20. This problem is easier if you start with the relevant equation and create a ratio using the Sun's values. Recall that the Sun has a surface temperature of 5778 K. ]
A cepheid star is located at a distance of 24.8kpc from the Earth and has an apparent visual magnitude of 13.3. Determine its pulsation period in days. Consider the following expression of the Leavitt relation My -2.78 log Pdays - 1.35, where My is the absolute visual magnitude and Pdays the pulsation period in days to 2 decimal places.
(Answer don't copy with hand written please)As a star runs out of hydrogen to fuel nuclear fusion in its core, changes within the star usually cause it to leave the main sequence, expanding and cooling as it does so. Would a star with a radius 12 times that of the Sun, but a surface temperature 0.5 times that of the Sun, be more, or less luminous than the Sun? Show and explain your reasoning. You may assume the surface area of a sphere is A = 4πr2.