Journal of The Korean Astronomical Society (천문학회지)

The Korean Astronomical Society (한국천문학회)
권호 표지
DOI QR코드

DOI QR Code

DUST SHELL MODELS FOR LOW MASS-LOSS RATE OXYGEN-RICH AGB STARS

  • SUH KYUNG-WON (Department of Astronomy & Space Science, Chungbuk National University)
  • Published : 2005.06.01

Abstract

We investigate the spectral energy distributions (SEDs) of low mass-loss rate O-rich asymptotic giant branch (AGB) stars using the infrared observational data including the Infrared Space Observatory (ISO) data. Comparing the results of detailed radiative transfer model calculations with observations, we find that the dust formation temperature is much lower than 1000 K for standard dust shell models. We find that the superwind model with a density-enhanced region can be a possible alternative dust shell model for LMOA stars.

Keywords

stars: AGB and post-AGB;Circumstellar Matter;radiative transfer;infrared: stars

File

Download PDF

References

  1. Danchi, W. C., Bester, M., Degiacomi, C. G., Greenhill, L. J., Townes, C. H. 1994, AJ, 107, 1469 https://doi.org/10.1086/116960
  2. Egan, M. P., Leung, C. M., & Spagna, G. F. Jr., 1988, Computer Phy. Comm., 48, 271 https://doi.org/10.1016/0010-4655(88)90047-1
  3. Egan, M. P., & Sloan, G. C., 2001, ApJ, 558, 165 https://doi.org/10.1086/368354
  4. Epchtein, N., Guibert, J., Nguyen-Quang-Rieu, Mr., Turon, P., & Wamsteker, W., 1980, A&A, 85, 1
  5. Groenewegen, M. A. T., Baas, F., Blommaert, J. A. D. L., et al., 1999, A&AS, 140, 197 https://doi.org/10.1051/aas:1999418
  6. Iben, I., 1975, ApJ, 196, 525 https://doi.org/10.1086/153433
  7. Kozasa, T., Hasegawa, H., & Seki, J., 1984, Ap&SS, 98, 61 https://doi.org/10.1007/BF00651951
  8. Lopez, B., et al., 1997, ApJ 488, 807 https://doi.org/10.1086/304719
  9. Onaka, T., de Jong, T., & Yamamura, I., 2002, A&A, 388, 573 https://doi.org/10.1051/0004-6361:20020574
  10. Sogawa, H., & Kozasa, T., 1999, ApJL, 516, L33 https://doi.org/10.1086/311992
  11. Suh, K.-W., 1999, MNRAS, 304, 389 https://doi.org/10.1046/j.1365-8711.1999.02317.x
  12. Suh, K.-W., 2002, MNRAS, 332, 513 https://doi.org/10.1046/j.1365-8711.2002.05303.x
  13. Suh, K.-W., 2004, ApJ, 615, 485 https://doi.org/10.1086/424440
  14. Suh, K.-W., & Jones, T. J., 1997, ApJ, 479, 918 https://doi.org/10.1086/303897
  15. Suh, K.-W., & Kim, H.-Y., 2002, A&A, 391, 665 https://doi.org/10.1051/0004-6361:20020871
  16. Sylvester, R. J., Kemper, F., Barlow, M. J., et al., 1999, A&A, 352, 587
  17. Ueta, T., & Meixner, M. 2003, ApJ, 586, 1338 https://doi.org/10.1086/367818
  18. Vassiladis, E., & Wood, P. R., 1993, ApJ, 413, 641 https://doi.org/10.1086/173033