Time Variation of Mid-Infrared Spectra of M-Type Mira Variables

  • Takashi Onaka
  • Teije de Jong
  • Issei Yamamura
Part of the Astrophysics and Space Science Library book series (ASSL, volume 283)


Time variation of mid-infrared (MIR) spectra of M-type Mira variables has been investigated by ISO/SWS observations of Z Cyg and T Cep. The variation in the Z Cyg spectrum can be accounted for by the variation in the stellar luminosity, if appropriate dust emissivity parameters are adopted. No apparent variation in the spectral shape despite of the intensity variation suggests that emission from high-temperature grains dominates in the MIR spectrum of T Cep


Circumstellar dust Mira variables Infrared spectroscopy 


  1. Cami, J., Yamamura, I., de Jong, T., et al. 1999, ESA SP-427, 281ADSGoogle Scholar
  2. Matsuura, M., Yamamura, I., Cami, J., et al. 2002, A&A, 389, 972ADSCrossRefGoogle Scholar
  3. Molster, F., Waters, L. B. F. M., & Tielens, A. G. G. M. 2002, A&A, 382, 222ADSCrossRefGoogle Scholar
  4. Onaka, T., de Jong, T., & Yamamura, I. 2002, A&A, 388, 573ADSCrossRefGoogle Scholar
  5. Yamamura, I., de Jong, T., Onaka, T., et al. 1999, A&A, 341, L9ADSGoogle Scholar

Copyright information

© Springer Science+Business Media Dordrecht 2003

Authors and Affiliations

  • Takashi Onaka
    • 1
  • Teije de Jong
    • 2
    • 3
  • Issei Yamamura
    • 4
  1. 1.Department of AstronomyUniversity of TokyoBunkyo-kuJapan
  2. 2.SRON-UtrechtUtrechtThe Netherlands
  3. 3.Astronomical InstituteUniversity of AmsterdamAmsterdamThe Netherlands
  4. 4.Institute of Space and Astronautical ScienceSagamiharaJapan

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