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If Sirius were moved 10x further away what would happen to its: parallax, surface temperature, apparent magnitude, absolute magnitude? Would these quantities in- crease, decrease or stay the same?

If Sirius were moved 10x further away what would happen to its: parallax, surface temperature, apparent magnitude, absolute magnitude? Would these quantities in- crease, decrease or stay the same?

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3.5 Sirius If Sirius were moved 10x further away what would happen to its: parallax, surface temperature, apparent magnitude, absolute magnitude? Would these quantities in- crease, decrease or stay the same?
Transcribed Image Text:3.5 Sirius If Sirius were moved 10x further away what would happen to its: parallax, surface temperature, apparent magnitude, absolute magnitude? Would these quantities in- crease, decrease or stay the same?
3.3 Exoplanet detection Radial velocity measurements show that a star is wobbling with a period of 7.5 days and with a velocity of 45 m s-1. If the star has the same mass as the Sun (2 × 1030kg), estimate the semi-major axis of the orbit of the planet that causes this wobble. Hence estimate the mass of the planet. What uncertainty remains in your estimate?
Transcribed Image Text:3.3 Exoplanet detection Radial velocity measurements show that a star is wobbling with a period of 7.5 days and with a velocity of 45 m s-1. If the star has the same mass as the Sun (2 × 1030kg), estimate the semi-major axis of the orbit of the planet that causes this wobble. Hence estimate the mass of the planet. What uncertainty remains in your estimate?
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