Abstract
Infrared observations in the J, H, and K bands were made on eleven RS CVn systems. Infrared (IR) excess ≳0.3 mag in the J, H, and K bands was observed from the three systems UX Ari, HR 1099 and σ CrB. Similar observations were also made on the RS CVn candidates HD 26354, 39937, 42449, 51268, and 86005.
The IR excess in the RS CVn systems for which near infrared photometric data are available is found to be correlated with the maximum of optical wave amplitude of these systems.
The observed excess cannot be explained on the basis of a single process such as: (i) emission from cool spots on the photosphere; (ii) free-free emission from an optically thin circumstellar plasma; or (iii) dust grain emission from circumstellar material.
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References
Allen C. W.: 1973,Astrophysical Quantities, (3rd ed.), Athlone Press, London.
Antonopoulou, E.: 1983,Astron. Astrophys. 120, 85.
Antonopoulou, E. and Williams, P. M.: 1980,Astrophys. Space Sci. 67, 469.
Atkins, H. L. and Hall, D. S.: 1972,Publ. Astron. Soc. Pacific 84, 638.
Batten, A. H., Fletcher, J. M., and Mann, P. J.: 1978,Publ. Dom. Astrophys. Obs. Victoria 15, No. 5, 236.
Catalano, S.: 1973, in A. H. Batten (ed.), ‘Extended Atmospheres and Circumstellar Matter in Spectroscopic Binary Systems’,IAU Symp. 51, 61.
Dorren, J. D. and Guinan, E. F.: 1980,Astron. J. 85, 1082.
Ghosh, S. K.: 1982, Ph.D. Thesis, University of Bombay.
Glass, I. S.: 1974,Monthly Notices Astron. Soc. South Africa 33, 53.
Gratton, L.: 1950,Astrophys. J. 111, 31.
Hall, D. S.: 1976, in W. S. Fitch (ed.), Multiple-periodic Varaible Stars’,IAU Colloq. 29.
Hall, D. S.: 1981, in R. M. Bonnet and A. K. Dupree (eds.),Solar Phenomena in Stars and Stellar Systems, D. Reidel Publ. Co., Dordrecht, Holland, p. 431.
Hall, D. S., Montle, R. E., and Atkins, H. L.: 1975,Acta Astron. 25, 125.
Hall, D. S., and Kreiner, J. M.: 1980,Acta Astron. 30, 387.
Jenkins, L. F.: 1963,General Catalogue of Trigonometric Stellar Parallaxes, Yale University Observatory, New Haven, Connecticut.
Johnson, H. L.: 1966, Ann.Rev. Astron. Astrophys. 4, 193.
Johnson, H. L., Mitchell, R. I., Iriarte, B., and Wisniewski, W. Z.: 1966,Comm. Lun. Plan. Lab. 4, 99.
Milone, E. F.: 1976,Astrophys. J. Suppl. 31, 93.
Milone, E. F. and Naftilan, S. A.: 1980, in M. J. Plavec, D. M. Popper, and R. K. Ulrich (eds.), ‘Close Binary Stars: Observations and Interpretation’,IAU Symp. 88, 419.
Needham, J. D., Phillips, J. P., Selby, M. J., and Sanchez Magro, C.: 1980,astron. Astrophys. 83, 370.
Parthasarathy, M., Raveendran, A. V., and Mekkaden, M. V.: 1981,Astrophys. Space Sci. 74, 87.
Rodono, M.: 1980, in E. B. Carling and Z. Kopal (eds.),Photometric and Spectroscopic Binary Systems, D. Reidel Publ. Co., Dordrecht, Holland, p. 285.
Srivastava, R. K.: 1981,Astrophys. Space Sci. 78, 123.
Weiler, E. J. and Stencel, R. E.: 1979,Astron. J. 84, 1372.
Wright, A. E. and Barlow, M. J.: 1975,Monthly Notices Roy. Astron. Soc. 170, 41.
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On leave from TIFR, Bombay, India.
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Verma, R.P., Ghosh, S.K., Iyengar, K.V.K. et al. Near infrared photometry of some RS CVn systems and candidates. Astrophys Space Sci 97, 161–169 (1983). https://doi.org/10.1007/BF00684620
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DOI: https://doi.org/10.1007/BF00684620