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More suns found

  1. Mar 10, 2006 #1

    wolram

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    http://arxiv.org/abs/astro-ph/0603219

    Authors: Jorge Melendez (1,2), Katie Dodds-Eden (1), Jose A. Robles (1) (1) RSAA/Mt Stromlo Observatory (Australia), (2) Caltech (USA), UNMSM (Peru)
    Comments: ApJ letters, in press

    Despite the observational effort carried out in the last few decades, no perfect solar twin has been found to date. An important milestone was achieved a decade ago by Porto de Mello & da Silva, who showed that 18 Sco is almost a solar twin. In the present work, we use extremely high resolution (R = 10^5) high S/N Keck HIRES spectra to carry out a differential analysis of sixteen solar twin candidates. We show that HD 98618 is the second closest solar twin, and that the fundamental parameters of both HD 98618 and 18 Sco are very similar (within a few percent) to the host star of our solar system, including the likelihood of hosting a terrestrial planet within their habitable zone. We suggest that these stars should be given top priority in exoplanet and SETI surveys.
     
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  3. Mar 10, 2006 #2

    Garth

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    How far away are these 'Suns'?

    Garth
     
  4. Mar 12, 2006 #3

    SpaceTiger

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    There's a table in the paper. 18 Sco is 14 pc away and HD 98618 is 38.7 pc away (as measured by Hipparcos).
     
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