Calculate the average density of a red giant core of mass 0.25 solar masses and radius 15,000 km
Q: Why does a type Ia supernova explode? in two sentences.
A:
Q: Supernova A is farther away than supernova B. The brightness of supernova A will be ________ than…
A: The brightness of supernova and its distance from the observer are related as
Q: Which of the following is most likely to occur when mass is continually added to a 1.5 solar mass…
A:
Q: A supernova remnant is now 3.65 pc in radius and is expanding at 4,850 km/s. Approximately how many…
A: Given, Radius of remnant of supernova = 3.65 pc = 1.116×1014km Rate of expanding = 4850 km/s
Q: A pulsating variable star with a period of 10 days would be a Cepheid having an absolute magnitude…
A: Pulsating variable star are made by expansion and contractions in the outer layers of any stars. Due…
Q: All of the single red-dwarf stars that ever formed are still on the main sequence today. (T/F)
A: Main sequence stars are those which are fusing hydrogen to helium in their cores. Almost 90% of the…
Q: Describe the evolution of a very low mass start a red dwarf, birth to death
A: Answer Low mass stars in their dating stages shed their outer layers transfer most of their mass…
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: where do hydrogen-buring stars spend most of their time on the H-R Diagram? Is it the main sequence,…
A: Hydrogen burning stars are those stars which burns hydrogen as their dominant fuel. Horizontal…
Q: Calculate the luminosity of an 8 solar mass star.
A: The luminosity of a star is the amount of energy that it radiates per second. It can be considered…
Q: If a contracting protostar is three times the radius of the Sun and has a temperature of only 3000 K…
A:
Q: A red giant loses a solar mass in 250,000 years via a superwind. After 0.8 million years, it has a…
A: The original mass f the red giant is 12.7 MSun.
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: A neutron star has a radius of 11.5 km and a mass of about 1.35M Calculate the density of this…
A:
Q: In a nova, why is the shell of hydrogen on the white dwarf consumed explosively rather than…
A: White stars are formed when stars that do not have enough mass to form neutron stars or black holes…
Q: Consider two different clusters with approximately the same turnoff luminosity. Cluster A has a main…
A: Given two clusters A and B on the H-R diagram (which is a plot between the luminosity and…
Q: Why do you expect neutron stars to have a more powerful magnetic field than a white dwarf?
A: A neutron star consists of ions along with neutrons which are responsible for radiation in the form…
Q: When two stars are in the same star system, they can affect each other’s evolution. Two stars in the…
A: Two stars in the same system might evolve at a different pace, depending on their distances in the…
Q: White dwarfs have a temperature of 100×103 K. Calculate the maximum wavelength of a White dwarf.
A: A white dwarf is a stellar core remnant that is highly dense and made of electron-degenerate matter.…
Q: The present-day density of the sun is about 1.4 g/cm3. The volume of a sphere is 4/3πr3. The density…
A: Given:ρsun=1.4g/cm3ρstar=ρsunxRsunRstar3volume of sphere =4/3πr3to find:ρsun when Rsun=50 times…
Q: Consider an M-dwarf star of mass 0.1M⊙ and luminosity 10−3L⊙. When the star joins the main sequence…
A: Luminosity of the star is defined as the power emitted by the star. Power is simply the energy…
Q: Suppose that a neutron star has a radius of 10 km and a temperature of 1,000,000 K. How luminous is…
A: The luminosity of a star is defined as the total amount of electromagnetic energy released by a star…
Q: What happens to a White Dwarf's radius if a little mass is added? What happens if a companion star…
A:
Q: A 1.8 M neutron and a 0.7 M white dwarf have been found orbiting each other with a period of 28…
A: Kepler’s third law for binary stars
Q: If the radius of the neutron star is 85.074 km, what is the average density of a neutron star that…
A: The density of a neutron star is given by, ρ=MV where M is the mass of the star and V is the volume…
Q: We learned in class that, when stars collapse under their own gravity, they conserve angular…
A:
Q: The ring around SN 1987A (see the figures below) initially became illuminated when energetic photons…
A: To calculate how long after the supernova SN 1987A the ring became illuminated, we need to consider…
Q: What is the difference between type I and type II supernovae
A: To determine Difference between type I and type II supernovae
Q: A supernova remnant is now 3.05 pc in radius and is expanding at 1,100 km/s. Approximately how many…
A: Given, The radius: r=3.05 pc=3.05×3.1 × 1013 km 1 pc =3.1 × 1013 kmor, r=9.455 ×…
Q: An object was discovered on Feb. 24.37 UT (position R.A. = 5h35m.8, Decl. = -69 18'), obtained m =…
A: Absolute magnitude and apparent magnitude of any stellar object are related as M=m-2.5logd102M is…
Q: a)What type of supernova is most luminous in light? (b) What kind of star results in such an…
A: a) Supernova is an astronomical event take place when a white dwarf star exploded. When the white…
Q: What is the size of a typical white dwarf? Group of answer choices 1.0 solar radii 0.5 solar…
A:
Q: Type 1a supernovae are not: The result of exceeding the Chandrasehkar limit. Produced…
A: Required :: Type 1a supernovae are not:
Q: describing the various stages in the life of a 1.0 solar mass star, 0.5 solar mass star, and a 3.0…
A: In this question we have to describe the life of a 0.5, 1.0 and 3.0 solar mass stars.
Q: 3. Calculate the radius of a 12,000 K white dwarf with a luminosity of 0.0004 solar luminosities.…
A:
Q: A supernova remnant is now 3.85 pc in radius and is expanding at 3,350 km/s. Approximately how many…
A:
Q: Say that a white dwarf has about the same radius as the earth and about the same mass as the sun.…
A:
Q: What is the average density of a neutron star that has the same mass as the sun but a radius of only…
A:
Q: A Type Ia supernova is observed and achieves an apparent magnitude of m = 19.89 at peak brightness.…
A: Given Values :The absolute magnitudes of Type Ia supernovae at peak brightness, M = -19 Apparent…
Q: What is the answer below if the radius of the neutron star is 29.894 km? (express your answer in the…
A: The mass of the Sun is 1.989×1030 kg. Hence, the mass of the star is M=1.989×1030 kg.
Q: What is the average density of a neutron star that has the same mass as the sun but a radius of only…
A:
Q: A distant Nebula is now 2.35 pc in radius and is expanding at 1100 km/s. Approximately when did the…
A: The rate of expansion of the Nebula is given by the formula,…
Q: If a neutron star has a radius of 13 km and a temperature of 9.0 x 10° K, how luminous is it?…
A:
Q: Comment on the difference between a nova and supernova. [Note: There are two basic types of…
A: Nova : A nova can be stated as a transient astronomical event that causes the sudden appearance of a…
Trending now
This is a popular solution!
Step by step
Solved in 3 steps
