if a protostellar disk is 260 au in radius and the disk plus the forming star together contain 7 solar masses what is the orbital speed at the outer edge of the disk in km per second. use the circular orbital velocity formula

Q: Consider a disk with disk temperature T = T0(r/AU)−1 with T0 = 200K.and surface density given by Σ =…

A: The objective of this question is to find the difference between the orbital speed of the gas at 1…

Q: What is an emission nebula?

A: The space between stars and galaxies is filled with clouds of gas and dust. These clouds of gas and…

Q: Suppose a planetary nebula is 4.6 pc in diameter, and Doppler shifts in its spectrum show that the…

A: The diameter of planetary nebula is given as, D=4.6 pc. Then, the radius of planetary nebula is…

Q: If a prostellar disk is 260 au in radius and the disk plus the forming star together contain 7 solar…

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Q: Use the small angle equation to find the angular diameter of Sgr A* if it has a diameter of 13 AU…

A: The small-angle equation is used in astronomy to calculate the distance between Earth and other…

Q: What would most bright nebulae look like if there were no interstellar dust?

A: A nebula is defined as a large region of interstellar clouds made of dust, hydrogen, helium, and…

Q: What is the orbital speed at the disk's outer edge in kilometers per second if a protostellar disk…

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Q: The Hydra super cluster is at a distance of about 800 MParsec. What is the recessional velocity?

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Q: How does a contracting protostar convert gravitational energy into thermal energy?

A: Stars are formed from clouds of gas present in the interstellar medium. Since the temperature is low…

Q: A giant molecular cloud is 30 pc in diameter and has a density of 339 hydrogen molecules/cm^3. What…

A: Concept used: Mass is found by multiplying by density and volume of sphere.

Q: Explain why the sky is blue and how that relates to reflection nebulae.

A: Dispersion. Despersion is a phenomena in which when light passes beteen 2 particle it disperses.

Q: Suppose that stars were born at random times over the last 10e10 years. The rate of star formation…

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Q: Describe each of the following nebulae and how they can be observed: HIl region Cold hydrogen gas…

A: (1) HII region (2) Cold hydrogen gas (3) Dust clouds

Q: A typical dense core of an interstellar gas cloud has a diameter of 0.2 pc and a mass of 2 solar…

A: The diameter of the gas cloud is defined as 0.2 pc. Therefore, the radius of the gas cloud will be…

Q: Neutron Star Accretion Disk. If the accretion disk around a 2.25-solar-mass neutron star has a…

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Q: What factors resist the contraction of a cloud of interstellar matter?

A: Interstellar matter is defined as the space between the stars' systems in the galaxy. It is made…

Q: If a protostellar disk is 210 AU in radius and the disk plus the forming star together contain 4…

A: the orbital speed is, v=GMr one solar mass is 1.989×1030 kg and 1 AU is 1.496×1011 m. thus,…

Q: what is the smallest planet that could be detected around a 0.4 Rsun M dwarf star?

A: transit depth is the ratio of surface area of planet and the star  transit depth = πRp2πRs2 where Rp…

Q: Please give answer. Describe, with the aid of suitable diagrams, the basic structure and components…

A: ATLAS detector at the LHC. We have to give information about structure and components of the ATLAS…

Q: How often (in years) does a planetary system form in our galaxy?

A: Number of stars in our galaxy = 3 x 1011 stars time to consider = 1010 years rate of star formation…

Q: A giant molecular cloud is 30 pc in diameter and has a density of 330 hydrogen molecules/cm^3. What…

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Q: Observations show that the gas ejected from SN 1987A is moving at about 10,000 km/s. How long will…

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Q: The gravitational collapse time for the Sun is a constraint on the timescale for the formation of…

A: Given  Radius of nebula,  R=4 lyR=4×9.461×1015 m  ⇒1 ly=9.461×1015 mR=37.844×1015 m Gravitational…

Q: We observe a star that is dstar away. How much extinction would there need to be (i.e., what must 7…

A: A star is observed that is at a distance away.We need to find the value of the extinction required…

Q: 2. The Crab pulsar radiates at a luminosity of $1 \times 10^{31} \mathrm{~W}$ and has a period of…

A: (a) To determine the rate at which the period is increasing and how long it will take to double:Step…

Q: The mass of the extra-solar planet HD-22 is 2.15E+26 kg, and it's radius is 1.52E+4 km. What is its…

A: Given value--- mass, m = 2.15×1026 kg radius, r = 1.52×104 km = 1.52×107 m. To find--- Density ?

Q: There are 200000 AU radius clouds will form a star of 10 solar masses and the 150000 AU radius…

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Q: suppose a planetary nebula is 2.8 pc in diameter, and doppler shifts in its spectrum show that the…

A: Given information: The diameter of the nebula (D) = 2.8 pc = 2.8 (3.1×1013 km) = 8.68 ×1013 km The…

Q: If a protostellar disk is 240 AU in radius and the disk plus the forming star together contain 9…

A: Given Radius r = 240 AU Mass m = 9 Solar mass Known Values 1 AU = 1.496 x 1011 m 1 solar mass =…

Q: What temperature would interstellar dust have to have to radiate most strongly at 100 micro meter?

A: When stars die they will slowly send out their outer layers. This forms large clouds of dust and is…

Q: A star orbiting Sagittarius A* is orbiting 970 AU from a 4 million MSun object. How fast (in km/s)…

A: The centripetal force is the force that keeps the planet or the star revolving around a central…

Q: (Astronomy) Supernova Ejection Times. Observations show that the gas ejected from SN 1987A is…

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Q: We observe a star that is dstar​ away.  How much extinction would there need to be (i.e., what must…

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Q: In a binary system, the maximum value of the radial velocity of one star with respect to the other…

A: Solution: Given Values,   The maximum value of the radial velocity of one star with respect to the…