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

Q: Use a diagram to explain what is meant by the parallax angle, p, for a star observed twice from…

A: Diagram for explaining parallax angle:        o   star                                      / \…

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: A star has a temperature T = 15000K, mass M = 0.25M⊙ and luminosity L = 0.02L⊙. Sketch the position…

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: Astronomy) (Part A) White Dwarf Size II. The white dwarf, Sirius B, contains 0.98 solar mass, and…

A: Mass of the dwarf planet = 0.98 solar mass                                          = 1.96 * 1033 gm…

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: Which star in the table below has the greatest diameter?     Star Name d (parsecs) Parallax…

A: d. 58 Ori

Q: A 1.5 M neutron star and a 0.7 M white dwarf have been found orbiting each other with a period of 10…

A: The expression for the Kepler’s third law for binary stars is as follows: MA+MB=a3p2…

Q: Is this a binary system?

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

Q: Favorite Star Polaris is 132 pc from Earth and has an apparent magnitude of 2.5. What is its…

A: When the brightness of a star is measured there are two ways, Apparent and absolute magnitudes.…

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: the parallax angle of a star to be 0.002 arc-seconds.  what would the  distance be to this star?

A: Given, Parallax angle, p=0.002 arc-seconds

Q: Which star in the table below has the least surface temperature?   Star Name d (parsecs) Parallax…

A: Since, distance of the star in terms of Parallax is, d=1parallax (in arc-sec)parsecs Now from…

Q: The density of Sirius B is 2×106 g/cm3 and its mass is 1.95×1030 kg. What is the radius of the white…

A: The given data are: ρ=2×106 g/cm3=2×109 kg/m3m=1.95×1030 kg Here, ρ and m represent the density and…

Q: is observed to have a period of 10 yr. The radial velocities of the two stars are determined to v1r…

A: Concept used : Two stars orbiting around each other form a binary star system  Given data:-*Time…

Q: Which point in the stars orbit corresponds to the point marked in the radial velocity curve?

A: Required :  The correct option.

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: is

A: The relationship between apparent visual magnitude(m), Absolute visual magnitude(Mv) and distance(d)…

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: 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: The star Firefly is located 3.0 pc away. If it had an absolute magnitude of 13.0, which value below…

A: Write the given data. d=3AbsM=13

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: 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: The Algol binary system consists of a 3.7 Msun star and a 0.8 Msun star with an orbital period of…

A: Given: The first mass is M1=3.7 Msun. The second mass is M2=0.8 Msun. The orbital period is p=2.87…

Q: You measure a star to have a parallax angle of 0.12 arc-seconds What is the distance to this star in…

A: Write the given values of the problem- Parallax angle=0.12 arc-second

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…

Q: The total intensity of light measured on earth, from an ecliptic binary, is plotted in the figure as…

A:

Q: the Sun?

A: Given: To explain the star which is white supergiant star also brightest and hottest than the Sun…

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.