Publication: Application of the spectral subtraction technique to the Ca II H & K and H_ε lines in a sample of chromospherically active binaries
Loading...
Official URL
Full text at PDC
Publication Date
1995-12
Advisors (or tutors)
Editors
Journal Title
Journal ISSN
Volume Title
Publisher
EDP Sciences
Citations
Exportar
Abstract
We present new spectroscopic observations in the Ca II H & K line region for a sample of 28 chromospherically active binary systems (RS CVn and BY Dra classes), with different activity levels. By using the spectral subtraction technique (subtraction of a synthesized stellar spectrum constructed from reference stars of similar spectral type and luminosity class) we obtain the active-chromosphere contribution to the Ca II H & K lines and to the H_ε line when it is present. We have compared the emission equivalent widths obtained with this technique with those obtained by reconstruction of the absorption line profile below the emission peak(s). The emissions arising from each individual star were obtained when it was possible to deblend the contribution of both components. The Ca II line profiles corresponding to different seasons and orbital phases are analysed in order to determine the contribution of each component and to study the chromospheric activity variations.
Description
© 1995 EDP Sciences.
This work has been supported by the Universidad Complutense de Madrid and the Spanish Dirección General de Investigación Científica y Técnica (DGICYT) under grant PB91-0348. We would like to thank the referee K.G. Strassmeier for suggesting several improvements and clarifications.
UCM subjects
Unesco subjects
Keywords
Citation
1. Baliunas S.L., Donahue R.A., Soon W.H. et al. 1995, ApJ 438, 269
2. Barden S.C., 1984, AJ 89, 683
3. Barden S.C., Nations H., 1985, BAAS 17, 879
4. Basri G., Wilcots E., Stout N., 1989, PASP 101, 528
5. Bidelman W.P., 1981, AJ 86, 553
6. Bidelman W.P., McConnell D.J., 1973, AJ 78, 687
7. Blanco C., Catalano S., Marilli E., Rodonò M., 1974, A&A 33, 257
8. Bopp B.W., 1984, ApJS 54, 387
9. Bopp B.W., Fekel F.C., 1977, AJ 82, 490
10. Bopp B.M., Talcott J.C., 1978, AJ 83, 1517
11. Bopp B.W., Fekel F.C., Griffin R.F., et al., 1979, AJ 84, 1763
12. Bopp B.W., Hall D.S., Henry G.W., Noah P., Klimke A. 1981a, PASP 93, 504
13. Bopp B.W., Noah P., Klimke A., Africano J., 1981b, ApJ 249, 210
14. Bopp B.W., Africano J.L., Stencel R.E., Noah P.V., Klimke A., 1983, ApJ 275, 691
15. Bopp B.W., Saar S.H., Ambruster C. et al., 1989, ApJ 339, 1059
16. Bopp B.W., Fekel F., Aufdenberg J.P. Dempsey R., Dadonas V., 1993, AJ 106, 2502
17. Buckley D.A., Tuohy I.R., Remillard R.A., Bradt H.V., Schwartz D.A., 1987, ApJ 315, 273
18. Carlos R.C., Popper D.M., 1971, PASP 83, 504
19. Catalano S., 1979, A&A 80, 317
20. Demircan O., 1990, in: Active Close Binaries, Ibanoğlu C. (ed.), Kluwer Academic Publishers, Dordrech, p. 431
21. Donahue R.A., 1993, Ph.D. Thesis, New Mexico State University
22. Eaton J.A., Barden S.C., 1988, Acta Astron. 38, 353
23. Eker Z., Hall D.S., Anderson C.M., 1995, ApJS, 96, 581
24. Fekel F.C., Simon T., 1985, ApJ 90, 812
25. Fekel F.C., Moffett T.J., Henry G.W., 1986, ApJS 60, 551
26. Fernández Figueroa M.J., Montesinos B., De Castro E., Rego M., Giménez A., Reglero V., 1986, A&A 169, 219
27. Fernández Figueroa M.J., Montes D., De Castro E., Cornide M., 1994, ApJS 90, 433 (FFMCC)
28. Frasca A., Catalano S., 1994, A&A 284, 883
29. García López R.J., Rebolo R., Beckman J.E., Crivellari L., 1990, A&AS 170, 109
30. García López R.J., Crivellari L., Beckman J.E., Rebolo R. 1992, A&A 262, 195
31. Griffin R. & R., Beggs D.W., 1994, MNRAS 270, 409
32. Hall D.S., 1976, in: IAU Symp., Multiple Periodic Variable Stars, Fitch W.S. (ed.), Dordrecht: Reidel, p. 287
33. Hatzes A.P., 1995, AJ 109, 350
34. Heintz W.D., 1981, ApJS 46, 247
35. Herbig G.H. 1985, ApJ 289, 269
36. Hirshfeld A., Sinnott R.W. (eds.), 1982, Sky Catalogue 2000 Vol 1
37. Hoffleit D., Jaschek C. 1982, The Bright Star Catalogue (4th ed.: New Haven: Yale University Press)
38. Huenemoerder D.P., Buzasi D.L., Ramsey L.W., 1989, AJ 98, 2264
39. Keenan P.C., McNeil R.C. 1989, ApJS 71, 245
40. Linsky J.L. Worden S.P., McClintock W., Robertson R.M., 1979, ApJS 41, 47
41. Mathioudakis M., Drake J.J., Vedder P.W., Schmitt J.H.M.M., BowyerS. 1994, A&A 291, 517
42. Mewe R., Schrijver C.J., Zwaan C., 1981, Space Sci. Rev. 30, 191
43. Middelkoop F., 1982, A&A 113, 1
44. Mohin S., Raveendran A.V., 1992, A&A 256, 487
45. Mohin S., Raveendran A.V., 1994, A&A 286, 824
46. Montes D., De Castro E., Cornide M., Fernández Figueroa M.J., 1994, in: Cool Stars, Stellar Systems, and the Sun, Eighth Cambridge Workshop, Caillault J.P. (ed.), ASP Conference Series 64, 444
47. Montes D., Fernández Figueroa M.J., De Castro E., Cornide M., 1995a, A&A 294, 165
48. Montes D., Fernández Figueroa M.J., De Castro E., Cornide M., 1995b, A&AS 109, 135
49. Montes D. et al., 1995c (in preparation)
50. Newmark J.S., Buzasi D.L., Huenemoerder D.P., et al., 1990, AJ 100, 560
51. Noyes R.W., Hartmann L.W., Baliunas S.L., Duncan D.K., Vaughan A.H. 1984, ApJ 279, 763
52. Pasquini L. 1992, A&A 266, 347
53. Pasquini L., Pallavicini R., Pakull M., 1988, A&A 191, 253
54. Popper D.M., 1976, IBVS 1083
55. Raveendran A.V., Mohin S., 1995, A&A (in press)
56. Shcherbakov A.G., Fernández Figueroa M.J., Martín Parra F., et al., 1995, A&A (submitted)
57. Strassmeier K.G., 1994a, A&A 281, 395
58. Strassmeier K.G., 1994b, A&AS 103, 413
59. Strassmeier K.G., Hron J., 1990, IBVS 3545
60. Strassmeier K.G., Hall D.S., Zeilik M., et al., 1988, A&AS 72, 291
61. Strassmeier K.G., Fekel F.C., Bopp B.W., Dempsey R.C., Henry G.W., 1990, ApJS 72, 191
62. Strassmeier K.G., Hall D.S., Fekel F.C., Scheck M., 1993, A&AS 100, 173 (CABS)
63. Taylor B.J. 1984, ApJS 54, 167
64. Thatcher J.D., Robinson R.D., 1993, MNRAS 262, 1
65. Wilson O.C., 1963, ApJ 138, 832
66. Wilson O.C., 1976, ApJ 205, 823
67. Wooley R., Epps E.A., Penston M.J., Pocock S.B., 1970, Roy Obs. Annals, 5
68. Xuefu L., Huisong T., 1987, Chin. A&A 11, 64
69. Xuefu L., Aigen L., He H., Fangjun L., 1993, Ap&SS 205, 359
70. Zarro D.M., Rodgers W.A. 1983, ApJS 53, 815