Astronomy and Astrophysics – Astrophysics
Scientific paper
2006-12-12
Astrophys.J.660:1700-1706,2007
Astronomy and Astrophysics
Astrophysics
19 pages, 4 figures, 1 table; submitted to ApJ on Dec. 8, 2006
Scientific paper
10.1086/514331
A moderately massive early Sun has been proposed to resolve the so-called faint early Sun paradox. We calculate the time-evolution of the solar mass that would be required by this hypothesis, using a simple parametrized energy-balance model for Earth's climate. Our calculations show that the solar mass loss rate would need to have been 2-3 orders of magnitude higher than present for a time on the order of ~2 Gy. Such a mass loss history is significantly at variance (both in timescale and in the magnitude of the mass loss rates) with that inferred from astronomical observations of mass loss in younger solar analogues. While suggestive, the astronomical data cannot completely rule out the possibility that the Sun had the required mass loss history; therefore, we also examine the effects of the hypothetical historical solar mass loss on orbital dynamics in the solar system, with a view to identifying additional tests of the hypothesis. Planetary and satellite orbits provide a few tests, but these are weak or non-unique.
Malhotra Renu
Minton David A.
No associations
LandOfFree
Assessing the massive young Sun hypothesis to solve the warm young Earth puzzle does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Assessing the massive young Sun hypothesis to solve the warm young Earth puzzle, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Assessing the massive young Sun hypothesis to solve the warm young Earth puzzle will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-117341