Protecting planets from their stars
نویسندگان
چکیده
منابع مشابه
When Extrasolar Planets Transit Their Parent Stars
When extrasolar planets are observed to transit their parent stars, we are granted unprecedented access to their physical properties. It is only for transiting planets that we are permitted direct estimates of the planetary masses and radii, which provide the fundamental constraints on models of their physical structure. In particular, precise determination of the radius may indicate the presen...
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Since the first massive planet in a short period orbit was discovered, the question arised how such an object could have formed. There are basically two formation scenarios: migration due to planet-disk or planet-planet interaction. Which of the two scenarios is more realistic can be found out by observing short-period planets of stars with an age between 10 and 10 yrs. The second aim of the su...
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We compare the metallicities of stars with radial velocity planets to the metallicity of a sample of field dwarfs. We confirm recent work indicating that the stars-with-planet sample as a whole is iron rich. However, the lowest mass stars tend to be iron poor, with several having [Fe/H] < −0.2, demonstrating that high metallicity is not required for the formation of short period Jupiter-mass pl...
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It can be shown that the mass of nucleons varies with adiabatic pressure inside celestial bodies and that such adiabatic pressure on the electronic escorts of atoms in the centre of celestial bodies reaching stellar mass ignition threshold through accumulation of primordial hydrogen is the triggering cause of nuclear fusion at the centre of such bodies.
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The coronal structure of main sequence stars continues to puzzle us. While the solar corona is relatively well understood, it has become clear that even stars of the same mass as the Sun can display very non-solar coronal behaviour, particularly if they are rapid rotators or in a binary system. At masses greater than and also less than that of the Sun, the non-solar internal structure appears t...
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ژورنال
عنوان ژورنال: Astronomy & Geophysics
سال: 2013
ISSN: 1366-8781,1468-4004
DOI: 10.1093/astrogeo/ats038