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  • De Medeiros, J. R. (author)

Overview of semi-sinusoidal stellar variability with the CoRoT satellite

  • Article/chapterEnglish2013

Publisher, publication year, extent ...

  • 2013-06-28
  • EDP Sciences,2013
  • printrdacarrier

Numbers

  • LIBRIS-ID:oai:DiVA.org:uu-207104
  • https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-207104URI
  • https://doi.org/10.1051/0004-6361/201219415DOI

Supplementary language notes

  • Language:English
  • Summary in:English

Part of subdatabase

Classification

  • Subject category:ref swepub-contenttype
  • Subject category:art swepub-publicationtype

Notes

  • Context. To date, the CoRoT space mission has produced more than 124 471 light curves. Classifying these curves in terms of unambiguous variability behavior is mandatory for obtaining an unbiased statistical view on their controlling root-causes. Aims. The present study provides an overview of semi-sinusoidal light curves observed by the CoRoT exo-field CCDs. Methods. We selected a sample of 4206 light curves presenting well-defined semi-sinusoidal signatures. The variability periods were computed based on Lomb-Scargle periodograms, harmonic fits, and visual inspection. Results. Color-period diagrams for the present sample show the trend of an increase of the variability periods as long as the stars evolve. This evolutionary behavior is also noticed when comparing the period distribution in the Galactic center and anti-center directions. These aspects indicate a compatibility with stellar rotation, although more information is needed to confirm their root-causes. Considering this possibility, we identified a subset of three Sun-like candidates by their photometric period. Finally, the variability period versus color diagram behavior was found to be highly dependent on the reddening correction.

Subject headings and genre

  • stars: variables: general
  • stars: rotation
  • techniques: photometric

Added entries (persons, corporate bodies, meetings, titles ...)

  • Ferreira Lopes, C. E. (author)
  • Leao, I. C. (author)
  • Canto Martins, B. L. (author)
  • Catelan, M. (author)
  • Baglin, A. (author)
  • Vieira, S. (author)
  • Bravo, J. P. (author)
  • Cortes, C. (author)
  • de Freitas, D. B. (author)
  • Janot-Pacheco, E. (author)
  • Maciel, S. C. (author)
  • Melo, C. H. F. (author)
  • Osorio, YeissonUppsala universitet,Institutionen för fysik och astronomi(Swepub:uu)yeima822 (author)
  • Porto de Mello, G. F. (author)
  • Valio, A. (author)
  • Uppsala universitetInstitutionen för fysik och astronomi (creator_code:org_t)

Related titles

  • In:Astronomy and Astrophysics: EDP Sciences555, s. A63-0004-63611432-0746

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