Solar interior structure and luminosity variations

  title={Solar interior structure and luminosity variations},
  author={Douglas O. Gough},
  journal={Solar Physics},
  • D. Gough
  • Published 1 November 1981
  • Physics
  • Solar Physics
The assumptions of standard solar evolution theory are mentioned briefly, and the principle conclusions drawn from them are described. The result is a rationalization of the present luminosity and radius of the Sun. Because there is some uncertainty about the interior composition of the Sun, a range of models is apparently acceptable.To decide which model is the most accurate, other more sensitive comparisons with observations must be made. Recent measurements of frequencies of dynamical… 
The Sun as an inconstant star
It has been thought for a long time that the luminosity of the Sun has remained constant since the Sun evolved into the Main Sequence stage almost 4.5 billion yr ago. However, many of recent data
Nearby Young Solar Analogs. I. Catalog and Stellar Characteristics
We present a catalog of 38 young solar analogs within 25 pc, stars that are uniquely well suited for observations of their circumstellar environments to improve our understanding of conditions within
The solar wind in time: a change in the behaviour of older winds?
In the present paper, we model the wind of solar analogues at different ages to investigate the evolution of the solar wind. Recently, it has been suggested that winds of solar type stars might
Faint Young Sun, Planetary Paleoclimates and Varying Fundamental Constants
The effect of a cosmic time variation of the gravitational constant on the solar luminosity evolution is studied. It is demonstrated that a varying gravitational constant can substantially affect the
Planetary Paleoclimates and Varying Fundamental Constants
The effect of a cosmic time variation of the gravitational constant on the solar luminosity evolution is studied. It is demonstrated that a varying gravitational constant can substantially affect the
The Young Sun
Meteorites and the Moon yield information on solar flares and the solar wind which, though patchy, spans 109 yr. However, as the solar wind and flares are primarily creatures of the corona they are
A Closer Earth and the Faint Young Sun Paradox: Modification of the Laws of Gravitation or Sun/Earth Mass Losses?
Given a solar luminosity LAr = 0.75L0 at the beginning of the Archean 3.8 Ga ago, where L0 is the present-day one, if the heliocentric distance, r, of the Earth was rAr = 0.956r0, the solar
Assessing the Massive Young Sun Hypothesis to Solve the Warm Young Earth Puzzle
A moderately massive young Sun has been proposed to resolve the so-called faint young Sun paradox. We calculate the time evolution of the solar mass that would be required by this hypothesis using a
Astrospheres and Solar-like Stellar Winds
  • B. Wood
  • Physics, Geology
    Living reviews in solar physics
  • 2004
Observations of the interaction regions carved out by the collisions between these winds and the interstellar medium have provided the first measurements of solar-like stellar winds.


Magnetic activity and variations in solar luminosity
Attempts to detect changes in the solar luminosity suggest that the solar constant has been misnamed1–4. Although the Nimbus satellite data4 show no significant fractional variations above 5 × 10−3
Theory of the solar cycle
The properties of kinematic αω-dynamos are briefly reviewed. The mean field concept, including turbulent diffusivity, is defended against recent criticism. It is pointed out that although the Maunder
Solar structure from global studies of the 5-minute oscillation
High sensitivity Doppier spectroscopy of integral sunlight in the 769.9 nm line of neutral potassium reveals several equally spaced lines of Q > 1,000 centred on the well known period of 5 min. These
Some theoretical remarks on solar oscillations
The properties of the- linear modes of oscillation of a nonrotating nonmagnetic star, with particular reference to the sun, are briefly described. The most likely mechanisms by which they might be
Is the Sun helium-deficient?
The recent observations ofsolar 5-min oscillations of low degree agree approximately with the predictions of a standard solar model with normal abundances of helium and heavy elements. Much of the
Solar–terrestrial influences on weather and climate
During the past century over 1,000 articles have been published claiming or refuting a correlation between some aspect of solar activity and some feature of terrestrial weather or climate.
Tobias Mayer's observations of the Sun: Evidence against a secular decrease of the solar diameter
Evidence for a significant secular decrease of the solar diameter has recently been presented by Eddy and Boornazian (1979). With regard to the enhanced interest in periodic or non-periodic
Is the Sun Shrinking?
Regression analysis yields a decrease of the angular diameter of Mercury, as viewed from the earth, of under 0.3 arc second per century, incompatible with the 2 arc seconds per century decrease obtained by Eddy for the equatorial diameter.
Is the sun constant
Small fluctuations in the solar constant can occur on time scales much shorter than the Kelvin time. Changes in the ability of convection to transmit energy through the superadiabatic and transition
Solar neutrinos: Theory versus observation
The current state of the solar neutrino problem is described. The predictions of solar models (standard and nonstandard) are reviewed. The neutrino absorption cross sections for all detectors of