Nuclear fusion in the deuterated cores of inflated hot Jupiters

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• 作者：Rachid Ouyed ; Prashanth Jaikumar
• 关键词：Planetary systems ; Planets and satellites ; general ; Planets and satellites ; interiors
• 刊名：Astrophysics and Space Science
• 出版年：2016
• 出版时间：March 2016
• 年：2016
• 卷：361
• 期：3
• 全文大小：919 KB
• 参考文献：Allard, F., Hauschildt, P.H., Alexander, D.R., Tamanai, A., Schweitzer, A.: Astrophys. J. 556, 357 (2001) CrossRef ADS
  Arras, P., Bildsten, L.: Astrophys. J. 650, 394 (2006) CrossRef ADS
  Baraffe, I., Chabrier, G., Barman, T.: Rep. Prog. Phys. 73, 016901 (2010) CrossRef ADS
  Batygin, K., Stevenson, D.J.: Astrophys. J. 614L, 238 (2010) CrossRef ADS
  Bayliss, D., et al.: Astron. J. 146, 113 (2013) CrossRef ADS
  Bodenheimer, P., Lin, D.N.C., Mardling, R.A.: Astrophys. J. 548, 466 (2001) CrossRef ADS
  Bosch, H.S., Hale, G.M.: Nucl. Fusion 32, 611 (1992) CrossRef ADS
  Burrows, A., Hubeny, I., Budaj, J., Hubbard, W.B.: Astrophys. J. 661, 502 (2007) CrossRef ADS
  Chabrier, G., Baraffe, I.: Astrophys. J. Lett. 661, L81 (2007) CrossRef ADS
  Chabrier, G., Leconte, J., Baraffe, I.: IAU Symp. 276, 171 (2011) ADS
  Czerski, K., Huke, A., Biller, A., Heide, P., Hoeft, M., Ruprecht, G.: Europhys. Lett. 54, 449 (2001) CrossRef ADS
  Demory, B.-O., Seager, S.: Astrophys. J. Suppl. Ser. 197, 12 (2011) CrossRef ADS
  Dintrans, B., Ouyed, R.: Astron. Astrophys. 375, L47 (2001) CrossRef ADS
  Enoch, B., Collier Cameron, A., Horne, K.: Astron. Astrophys. 540, A99 (2012) CrossRef ADS
  Fortney, J.J., Nettelmann, N.: Space Sci. Rev. 152, 423 (2010) CrossRef ADS
  Ginzburg, S., Sari, R.: arXiv:​1501.​02087 (2015)
  Guillot, T.: Planet. Space Sci. 47, 1183 (1999) CrossRef ADS
  Guillot, T.: Annu. Rev. Earth Planet. Sci. 33, 493 (2005) CrossRef ADS
  Guillot, T., Showman, A.P.: Astron. Astrophys. 385, 156 (2002) CrossRef ADS
  Guillot, T., Stevenson, D.J., Hubbard, W.B., Saumon, D.: In: Bagenal, F., Dowling, T.E., McKinnon, W.B. (eds.) Jupiter: The Planet, Satellites and Magnetosphere, p. 35. Cambridge Planetary Science, Cambridge University Press, Cambridge (2004)
  Guillot, T., Santos, N.C., Pont, F., Iro, N., Melo, C., Ribas, I.: Astron. Astrophys. 453, L21 (2006) CrossRef ADS
  Hansen, B.M.S.: Astrophys. J. Suppl. Ser. 179, 484 (2008) CrossRef ADS
  Huang, X., Cumming, A.: Astrophys. J. 757, 47 (2012) CrossRef ADS
  Hubbard, W.B.: Astrophys. J. 152, 745 (1968) CrossRef ADS
  Hubbard, W.B.: Icarus 30, 305 (1977) CrossRef ADS
  Hubbard, W.B.: Planetary Interiors. Van Nostrand-Reinhold, New York (1984)
  Ibgui, L., Burrows, A.: Astrophys. J. 700, 1921 (2009) CrossRef ADS
  Jackson, B., Greenberg, R., Barnes, R.: Astrophys. J. 678, 1396 (2008) CrossRef ADS
  Johnson, J.A., Aller, K.M., Howard, A.W., Crepp, J.R.: Publ. Astron. Soc. Pac. 122, 905 (2010) CrossRef ADS
  Kasagi, J.: Prog. Theor. Phys. Suppl. 154, 365 (2004) CrossRef ADS
  Kasagi, J., Yuki, H., Baba, T., Takashi, N., Ohtsuki, T., Lipson, A.G.: J. Phys. Soc. Jpn. 71(12), 2881 (2002) CrossRef ADS
  Kurokawa, H., Inutsuka, S.: arXiv:​1511.​03063 (2015)
  Laughlin, G., Crismani, M., Adams, F.C.: Astrophys. J. 729, L7 (2011) CrossRef ADS
  Leconte, J., Chabrier, G.: Astron. Astrophys. 540, A20 (2012) CrossRef ADS
  Martin, E.L., Spruit, H.C., Tata, R.: Astron. Astrophys. 535, A50 (2011) CrossRef ADS
  Miller, N., Fortney, J.J.: Astrophys. J. Lett. 736, L29 (2011) CrossRef ADS
  Miller, N., Fortney, J.J., Jackson, B.: Astrophys. J. 702, 1413 (2009) CrossRef ADS
  Ouyed, R.: In: Penny, A. (ed.) Planetary Systems in the Universe, Proceedings of IAU Symposium #202, Manchester, United Kingdom, August 2000, p. 280 (2004)
  Ouyed, R., Fundamensi, W.R., Cripps, G.R., Sutherland, P.G.: Astrophys. J. 501, 367 (1998) (OFCS98) CrossRef ADS
  Peres, A.J.: J. Nucl. Mater. 50, 5569 (1979)
  Raiola, F., et al.: Phys. Lett. B 547, 193 (2002) CrossRef ADS
  Seager, S., Kuchner, M., Hier-Majumder, C.A., Militzer, B.: Astrophys. J. 669, 1279 (2007) CrossRef ADS
  Smentkowski, V.S.: Prog. Surf. Sci. 64, 1 (2000) CrossRef ADS
  Spiegel, D.S., Burrows, A.: Astrophys. J. 772, 76 (2013) CrossRef ADS
  Stevenson, D.J.: Planet. Space Sci. 30, 755 (1982) CrossRef ADS
  Thorngren, D.P., Fortney, J.J., Lopez, E.D.: arXiv:​1511.​07854 (2015)
  Weiss, L.M., et al.: Astrophys. J. 768, 14 (2013) CrossRef ADS
  Wilson, H.F.: Icarus 250, 400 (2015) CrossRef ADS
  Wilson, H.F., Militzer, B.: Phys. Rev. Lett. 108, 111101 (2012a) CrossRef ADS
  Wilson, H.F., Militzer, B.: Astrophys. J. 745, 54 (2012b) CrossRef ADS
  Youdin, A.N., Mitchell, J.L.: Astrophys. J. 721, 1113 (2010) CrossRef ADS
  Zapolsky, H.S., Salpeter, E.E.: Astrophys. J. 158, 809 (1969) CrossRef ADS
  
• 作者单位：Rachid Ouyed (1)
  Prashanth Jaikumar (2)
  
  1. Department of Physics & Astronomy, University of Calgary, 2500 University Drive NW, Calgary, AB, T2N 1N4, Canada
  2. Department of Physics and Astronomy, California State University Long Beach, 1250 Bellflower Blvd., Long Beach, CA, 90840, USA
  
• 刊物类别：Physics and Astronomy
• 刊物主题：Physics
  Astronomy
  
• 出版者：Springer Netherlands
• ISSN：1572-946X

文摘

Ouyed et al. (Astrophys. J. 501:367, 1998) proposed Deuterium (DD) fusion at the core-mantle interface of giant planets as a mechanism to explain their observed heat excess. But rather high interior temperatures (\(\sim10^{5}~\mbox{K}\)) and a stratified D layer are needed, making such a scenario unlikely. In this paper, we re-examine DD fusion, with the addition of screening effects pertinent to a deuterated core containing ice and some heavy elements. This alleviates the extreme temperature constraint and removes the requirement of a stratified D layer. As an application, we propose that, if their core temperatures are a few times \(10^{4}~\mbox{K}\) and core composition is chemically inhomogeneous, the observed inflated size of some giant exoplanets (“hot Jupiters”) may be linked to screened DD fusion occurring deep in the interior. Application of an analytic evolution model suggests that the amount of inflation from this effect can be important if there is sufficient rock-ice in the core, making DD fusion an effective extra internal energy source for radius inflation. The mechanism of screened DD fusion, operating in the above temperature range, is generally consistent with the trend in radius anomaly with planetary equilibrium temperature \(T_{\mathrm{eq}}\), and also depends on planetary mass. Although we do not consider the effect of incident stellar flux, we expect that a minimum level of irradiation is necessary to trigger core erosion and subsequent DD fusion inside the planet. Since DD fusion is quite sensitive to the screening potential inferred from laboratory experiments, observations of inflated hot Jupiters may help constrain screening effects in the cores of giant planets. Keywords Planetary systems Planets and satellites: general Planets and satellites: interiors