A) How close does the planet need to be to the star in order to receive the same

Question

A) How close does the planet need to be to the star in order to receive the same amount of energy as the Earth receives from the sun? (The solar flux is 1.386x10^6 erg s-1 cm-2)

B) What is the orbital period of the planet at this distance?

C) What is the magnitude of the radial velocity perturbation of the star?

D) If the system is edge on to us, would we be likely to detect this planet using the radial velocity method?

1) There is a one earth mass planet orbiting an M5 star of 0.2 Me and luminosity 1x10 2 Lo. A) How close does the planet need to be to the star in order to receive the same amount of energy as the Earth receives from the Sun The solar flux is 1.386x106 erg s 1 cm B) What is the orbital period of the planet at this distance? C What is the magnitude of the radial velocity perturbation of the star? D) If the system is edge on to us, would we be likely to detect this planet using the radial velocity method?

Explanation / Answer

A) energy of the star is very higher , energy of this planet is not enough for becoming a star.

B) orbit period of the earth is 365 days or 1 year, if we compare this planet to the earth then orbit period of the planet is M5= 5 * 365 day= 1825 days or 5 year.

C) compare to earth , radial velocity perturbation of the star will be near by earth radial velocity which is 1.4 m/sec so we can say that radial velocity of of the planet is approximate 2.0 m/sec.

D)

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.