which of the following describes the physical characteristics of Barnard’s star?

Q: Star A and Star B are both on the main sequence. Star A is 74 times more luminous than Star B. What…

A:

Q: Based on your radial velocity curve, record the orbital period P in days. This is the time elapsed…

A: 1) The orbital period P is the time elapsed between two subsequent peaks or troughs on the curve.…

Q: With a pair of binoculars, the faintest stars that you can see have an apparent magnitude of…

A:

Q: The lower mass a star, the (shorter, longer, lighter, heavier) it lives. The higher mass a star, the…

A: Solution: The star which is having a higher mass has more hydrogen as fuel. The lifespan of the star…

Q: All stars start their lives with the same basic composition. What determines their differences? O…

A: Mass they formed with

Q: In a binary star system, the average separation between the stars is 4.0 AU, and their orbital…

A:

Q: What are the approximate spectral type, temperature, absolute magnitude number, and luminosity of…

A: Required :  Spectral type, absolute magnitude, temperature and luminosity of star E.

Q: For each type of stellar explosion, identify its progenitor star

A:

Q: Which of the following is least reasonable regarding a star's position on the HR diagram? Group of…

A: "White dwarfs are small and cool and are located in the lower left part of the HR diagram."This…

Q: The red supergiant star in Orion is called Betelgeuse, and its distance is 130 pc. What is the…

A: Parallax is the defined as the apparent shift in the position of any star (or other object) against…

Q: What size star is the sun? O supergiant O medium O giant O white dwarf

A: The sun size is about 696340 km in radius and it's mass is 1.989*10^30 kg.

Q: Is this a binary system?

A: Yes. This is a binary system. Specifically this is called a spectroscopic binary system.

Q: sequence

A: Hertzsprung-Russell's diagram clearly shows that the star spends most of its life as a main-sequence…

Q: If the two stars orbit in a such a way that the big star is 4 AU from the center of the mass and the…

A: Given:distance of larger star from COM, ra = 4 AUdistance of smaller star from COM, rb = 12 AUtotal…

Q: What is the luminosity, in solar units, of a brown dwarf whose radius is 0.1 solar radii and whose…

A: Luminosity of a star or an object is the total amount of energy radiated per second by that object.…

Q: Why does the luminosity of a star depend on both its radius and its temperature?

A: Luminosity is the radiant power emitted by star. The luminosity is measured in Watt or Joules per…

Q: Using the proportionality relationships for stellar luminosity as a function of mass and stellar…

A: Stellar lifetime is directly proportional to Stellar mass. Stellar luminosity is inversely…

Q: Consider two stars on the main sequence, A and B. Star A has a mass of Мо Star B has a mass of 0.2…

A: Solution attached in the photo

Q: a) What is a binary star system? (b) describe briefly two methods for showing that a system is a…

A: (a) A binary star system is a system of two stars orbiting each other around a common center. Binary…

Q: Two stars have the difference between their apparent magnitudes +5, so their apparent luminosity…

A: The difference between the apparent magnitude is given as m1-m2=+5

Q: Distinguish between eutectoid and eutectic terms a in binary system.

A: We have to give difference between eutectoid and eutectic  terms

Q: Main sequence star A is 5 times as massive as main sequence star B. How do the main sequence…

A: Main sequence stars are those which fuse hydrogen atoms in their core to form helium. They have a…

Q: Star 1 and star 2 have the same V-magnitude, V = 7.5. However, they have different B-magnitudes, B1…

A: Given data : Star 1 and star 2 V-magnitude, V = 7.5 B-magnitudes, B1 = 7.2 and B2 = 8.5 d2 = 10d1 To…

Q: Star A’s luminosity is four times greater than Star B’s. Both stars have the same surface…

A:

Q: Suppose the distance to a star is doubled. Then the luminosity of the star is O Remains the same,…

A: Luminosity and apparent brightness are 2 different things. Luminosity is unique property of body and…

Q: What is the total mass of a visual binary system if the average separation of the stars is 8 AU and…

A: A binary system is formed when two astronomical objects come close enough to start orbiting each…

Q: On a H-R diagram for main sequence stars, as temperature increases, brightness usually increases…

A: Required: Variation of brighness with  temperature in HR diagram.

Q: Why does the orbital period of a binary star depend on its mass?

A: A binary system is formed when two massive astronomical objects start orbiting each other around a…

Q: You've just discovered a new X-ray binary, which we will call Hyp-X1 ("Hyp" for hypothetical). The…

A:

Q: If a T Tauri star is the same temperature as the sun but is ten times more luminous, what is its…

A: The energy radiated by a star per second is known as its luminosity and is directly proportional to…

Q: In a laboratory, the Balmer-beta spectral line of hydrogen has a wavelength of 486.1 nm . If the…

A: Wavelength of (λ°) = 481.6 nm Difference of wavelength ∆ λ = λ- λ° = 486.1- 485.8 =  0.3 nm Speed of…

Q: The star G1710 is currently at a distance of 62 lightyears and has an apparent visual magnitude of…

A:

Q: Calculate the gravitational energy released by the Sun.

A: “Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: What is the size of a typical white dwarf? Group of answer choices   1.0 solar radii   0.5 solar…

A:

Q: We will take a moment tổ compare ROw BrigriLIy a Wiite uwan stal sines Compdleu 10 a leu glant 3lai.…

A: Given: Tw=10,000 KTR=5,000 KRw=1100RsunRR=100Rsun we have to find ratio of Luminosity: LRLw=?

Q: If a star has a surface temperature of 3000 K but a luminosity 150 times greater than our Sun, what…

A: luminosity =  150 times greater than Sun, temperature = 3000 K what size is this star?

Q: What are the on the axes of a Hertzsprung-Russell diagram? (b) Name one thing you can tell about a…

A: Hertzsprung-Russell Diagram plots the temperature of the start against their luminosity (or) colour…

Q: Number the following stages in the life cycle of a sun-like star in order of occurrence (1-8): White…

A: There are billions of galaxies in the universe and in it there are billions of stars. Stars are…

Stellar evolution

We may see thousands of stars in the dark sky. Our universe consists of billions of stars. Stars may appear tiny to us but they are huge balls of gasses. Sun is a star of average size. Some stars are even a thousand times larger than the sun. The stars do not exist forever they have a certain lifetime. The life span of the sun is about 10 billion years. The star undergoes various changes during its lifetime, this process is called stellar evolution. The structure of the sun-like star is shown below.

Red Shift

It is an astronomical phenomenon. In this phenomenon, increase in wavelength with corresponding decrease in photon energy and frequency of radiation of light. It is the displacement of spectrum of any kind of astronomical object to the longer wavelengths (red) side.