Advertisement

Exploiting the infrared: IRAS observations of the main sequence

  • D. E. Backman
  • F. C. Gillett
Exploiting the Infrared
Part of the Lecture Notes in Physics book series (LNP, volume 291)

Abstract

We examined coadded IRAS survey data on samples of nearby main sequence stars in search of far-IR excesses similar to examples attributed to clouds of orbiting grains. Of 134 systems, 25 (19%) show significant excesses at 25, 60, or 100 μm with color temperatures greater than 35 K. Approximately 15% of the stars have excess more luminous than 2×10−5L*, roughly independent of spectral type. Several stars with excesses appear to be older than 2×109 yrs, indicating that the particle cloud phenomenon is not solely a feature of young objects. Models of three prominent clouds that have been spatially resolved (β Pic, α PsA, and α Lyr) imply central depleted regions with radii of order 20 AU. One possible explanation for maintenance of the depleted regions is that a planet orbits at and defines each cloud's inner boundary, sweeping up particles entering that region. The sun could have a cloud with similar geometry and somewhat smaller optical depth than these examples which would be difficult to detect from earth because of bright zodiacal and galactic emission.

Keywords

Spectral Type Main Sequence Color Temperature Particle Cloud Main Sequence Star 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Aumann, H. H., Gillett, F. C., Beichman, C. A., de Jong, T., Houck, J. R., Low, F. J., Neugebauer, G., Walker, R. G., and Wesselius, P. R. 1984, Ap. J. Lett. 278, L23.Google Scholar
  2. Aumann, H. H. 1985, P. A. S. Pacific 97, 885.Google Scholar
  3. Backman, D. E., Gillett, F. C., Aumann, H. H., Neugebauer, G., Low, F. J., and Waters, R. 1988, in prep.Google Scholar
  4. Backman, D. E., Gillett, F. C., and Low, F. J. 1986, Adv. in Space-Res. 6 (7), 43.Google Scholar
  5. Burns, J., Lamy, P. L., and Soter, S. 1979, Icarus 40, 1.Google Scholar
  6. Chester, T. J. 1985, in Liqht on Dark Matter, ed. F. P. Israel, Reidel Co., Dordrecht, p. 3.Google Scholar
  7. Cohen, M., Schwartz, D. E., Chokshi, A., and Walker, R. G. 1987, A. J. 93, 1199.Google Scholar
  8. Coté, J. 1987, A. A. 181, 77.Google Scholar
  9. Duncan, D. K. 1981, Ap. J. 248, 651.Google Scholar
  10. Explanatory Supplement to the IRAS Cataloqs and Atlases 1987, eds. C. A. Beichman, G. Neugebauer, H. J. Habing, P. E. Clegg, and T. J. Chester (US Government Printing Office).Google Scholar
  11. Gillett, F. C., Aumann, H. H., Low, F. J., Neugebauer, G., Waters, R. 1984, paper presented at Protostars and Planets II Conf., Tucson.Google Scholar
  12. Gillett, F. C. 1985, in Liqht on Dark Matter, ed. F. P. Israel, Reidel Co., Dordrecht, p. 61.Google Scholar
  13. Gliese, W. 1969, Cataloque of Nearby Stars, Veröffentl. Astron. Rechen-Instituts, Heidelberg, Nr. 22.Google Scholar
  14. Gliese, W. and Jahreiss, H. 1979, A. A. Suppl. 38, 423.Google Scholar
  15. Good, J. C., Hauser, M. G., and Gautier, T. N. 1986, Adv. in Space Res. 6 (7), 83.Google Scholar
  16. Gradie, J., Hayashi, J., Zuckerman, B., Epps, H., and Howell, R. 1987, paper presented at Lunar and Planetary Science Conf. XVIII, Houston.Google Scholar
  17. Hoffleit, D., and Jaschek, C. 1982, The Bright Star Catalog, 4th revised ed., Yale University Observatory, New Haven.Google Scholar
  18. IRAS Catalogues and Atlases: Atlas of Low Resolution Spectra, F. M. Olnon and E. Raimond, eds., 1986, A. A. Suppl.65, 607.Google Scholar
  19. IRAS Point Source Catalog 1985, Joint IRAS Science Working Group (US Government Printing Office).Google Scholar
  20. Isobe, S. 1970, P. A. S. Japan 22, 429.Google Scholar
  21. Jaschek, M., Jaschek, C., and Egret, D. 1986, A. A. 158, 325.Google Scholar
  22. Kleinmann, S. G., Cutri, R. M., Young, E. T., Low, F. J., Gillett, F. C. 1986, IRAS Serendipitous Survey Catalog (US Government Printing Office).Google Scholar
  23. Koornneef, J. 1983, A. A. Suppl. 51, 489.Google Scholar
  24. Matese, J. L., Whitmire, D. P., Lafleur, L. D., Reynolds, R. T., and Cassen, P.M. 1987, AAS Division of Planetary Sciences Conf., abstract.Google Scholar
  25. Low, F. J., et al. 1984, Ap. J. Lett. 278, L19.Google Scholar
  26. Sadakane, K. and Nishida, M. 1986, P. A. S. Pacific 98, 685.Google Scholar
  27. Simon, T., Herbig, G., and Boesgaard, A. M. 1985, Ap. J. 293, 551.Google Scholar
  28. Smith, B. A. and Terrile, R. J. 1984, Science 228, 1421.Google Scholar
  29. Sykes, M. V. and Greenberg, R. 1986, Icarus 65, 51.Google Scholar
  30. VandenBergh, D. A. 1983, Ap. J. Suppl. 51, 29.Google Scholar
  31. Varsik, J. 1987, Ap. J. (preprint).Google Scholar
  32. Waters, L. B. F. M., Coté, J., and Aumann, H. H. 1987, A. A. 172, 225.Google Scholar

Copyright information

© Springer Verlag 1987

Authors and Affiliations

  • D. E. Backman
    • 1
  • F. C. Gillett
    • 1
  1. 1.Kitt Peak National ObservatoryNational Optical Astronomy ObservatoriesTucsonUSA

Personalised recommendations