The classical T Tauri star Sz 68: Doppler imaging and evidence for magnetospheric accretion

Astrophysical Journal

Volumn 487, Issue 2 PART I, 1997, Pages 896-915

  Joiins Krull, Christopher M ^a,b   Hatzes, Artie P ^a  

^a University of Texas at Austin   (United States)

^b UNIVERSITY OF COLORADO   (United States)

Author keywords

Accretion, accretion disks; Line: profiles; Stars: imaging; Stars: individual (Sz 68); Stars: magnetic fields; Stars: pre main sequence

Indexed keywords

EID: 21944435269     PISSN: 0004637X     EISSN: 15384357     Source Type: Journal    
DOI: 10.1086/304644     Document Type: Article

References (106)

1. Appenzeller, I., Jankovics, I, & Krautter, J. 1983, A&AS, 53, 291
2. Appenzeller, I., & Mundt, R. 1989, Astron. Astrophys. Rev., 1, 291
3. Basri, G., & Batalha, C. 1990, ApJ, 363, 654
4. Basri, G., & Bertout, C. 1993, in Protostars and Planets III, ed. E. H. Levy & J. I. Lunine (Tucson: Univ. Arizona), 543
5. Belvedere, G., Paterno, U & Stix, M. 1980, A&A, 88, 240
6. Bertout, C. 1989, ARA&A, 27, 351
7. Bertout, C, Basri, G., & Bouvier, J. 1988, ApJ, 330, 350
8. Bertout, C, & Mennessier, C. 1996, in IAU Symp. 176, Stellar Surface Structure, ed. K. G. Strassmeier & J. L. Linsky (Dordrecht: Reidel), 95
9. Bessell, M. S, & Brett, J. M. 1988, PASP, 100, 1134
10. Bevington, P. R., & Robinson, D. K. 1992, Data Reduction and Error Analysis for the Physical Sciences (New York: McGraw-Hill)
11. Bouvier.J. 1990, AJ, 99, 946
12. Bouvier, J., & Bertout, C. 1989, A&A, 211, 99
13. Bouvier, J., Bertout, C, Benz, W., & Mayor, M. 1986, A&A, 165, 110
14. Bouvier, J., Bertout, C, & Bouchet, P. 1986, A&A, 158, 149
15. Bouvier, J., Cabrit, S., Fenandez, M-, Martin, E. L., & Matthews, J. M. 1993, A&A, 272, 176
16. Bouvier, J, Covino, E., Kovo, O, Martin, E. L., Matthews, J. M., Terranegra, L., & Beck, S. C. 1995, A&A, 299, 89
17. Bumba, V., & Howard, R. 1965, ApJ, 141, 1502
18. _. 1969, Sol. Phys, 7, 28
19. Cabrit, S., Edwards, S., Strom, S. E., & Strom, K. M. 1990, ApJ, 354, 687
20. Calvet, N., & Hartmann, L. 1992, ApJ, 386, 239
21. Calvet, N, Hartmann, L., & Hewett, R. 1992, ApJ, 386, 229
22. Camenzind, M. 1990, Rev. Mod. Astron., 3, 234
23. Cameron, A. C, & Campbell, C. G. 1993, A&A, 274, 309
24. Catala, C, Czarny, J, Felenbok, P., Talavera, A., & Thee, P. S. 1991, A&A, 244, 473
25. Chumak, O. V., & Ivanovskii, V. S. 1992, AZh Pis'ma, 18, 807
26. Cohen, M., & Kuhi, L. V. 1979, ApJS, 41, 743
27. DeCampli, W. M. 1981, ApJ, 244, 124
28. Donahue, R. A, & Baliunas, S. L. 1992, ApJ, 439, 860
29. _. 1994, in ASP Conf. 64, Cool Stars, Stellar Systems, and the Sun, Eighth Cambridge Workshop, ed. J. P. Caillault (San Francisco: ASP), 396
30. Edwards, S., Cabrit, S, Strom, S. E., Heyer, L, Strom, K. M., & Anderson, E. 1987, ApJ, 321, 473
31. Edwards, S, Hartigan, P., Ghandour, L., & Andrulis, C. 1994, AJ, 108, 1056
32. Edwards, S, et al. 1993, AJ, 106, 372
33. Giampapa, M. S., Basri, G. S., Johns, C. M., & Imhoff, C. L. 1993, ApJS, 89, 321
34. Gray, D. F. 1982, ApJ, 258, 201
35. _. 1988, Lectures on Spectral-Line Analysis: F, G, and K Stars (Ontario : Aylmer Express)
36. _. 1992, The Observation and Analysis of Stellar Photospheres (New York: Cambridge Univ. Press)
37. Gullbring, E, Petrov, P. P., Ilyin, I, Tuominen, L, Gahm, G. F., & Loden, K. 1996, A&A, 314, 835
38. Hall, D. S. 1991, in IAU Colloq. 130, The Sun and Cool Stars: Activity, Magnetism, and Dynamos, ed. I. Tuominen, D. Moss, & G. Rüdiger (Berlin: Springer), 353
39. Hartigan, P., Edwards, S, & Ghandour, L. 1995, ApJ, 452, 736
40. Hartigan, P., Kenyon, S. J, Hartmann, L., Strom, S. E, Edwards, S, Welty, A. D., & Stauffer, J. 1991, ApJ, 382, 617
41. Hartmann, L, Calvet, N, Avrett, E. H, & Loeser, R. 1990, ApJ, 349, 168
42. Hartmann, L, Edwards, S., & Avrett, E. 1982, ApJ, 261, 279
43. Hartmann, L, Hewett, R, & Calvet, N. 1994, ApJ, 426, 669
44. Hartmann, L. W., & Kenyon, S. J. 1990, ApJ, 349, 190
45. Hatzes, A. P. 1995, ApJ, 451, 784
46. Hatzes, A. P., & Vogt, S. S. 1992, MNRAS, 258, 387
47. Hatzes, A. P., Vogt, S. S., Ramseyer, T. F., & Misch, A. 1996, ApJ, 469, 808
48. Herbig, G. H. 1961, ApJ, 133, 337
49. Herbig, G. H., & Bell, K. R. 1988, Lick Obs. Bull. No. 1111
50. Herbst, W. 1989, AJ, 98, 2268
51. Herbst, W., et al. 1987, AJ, 94, 137
52. Hessman, F. V., & Guenther, E. W. 1997, A&A, 321, 497
53. Home, J. H., & Baliunas, S. L. 1986, ApJ, 302, 757
54. Johns, C. M., & Basri, G. 1995a, ApJ, 449, 341
55. -. 1995b, AJ, 109, 2800
56. Johns-Krull, C. M. 1996, A&A, 306, 803
57. Johns-Krull, C. M., & Basri, G. 1997, ApJ, 474, 433
58. Johnson, H. L. 1966, ARA&A, 4, 193
59. Joncour, I., Bertout, C, & Bouvier, J. 1994a, A&A, 291, L19
60. Joncour, L, Bertout, C, & Menard, F. 1994b, A&A, 285, L25
61. Kenyon, S. J., Yi, L, & Hartmann, L. 1996, ApJ, 462, 439
62. Kichatinov, L. L., & Rüdiger, G. 1993, A&A, 276, 96
63. König!, A. 1991, ApJ, 370, L39
64. Kuan, P. 1975, ApJ, 202, 425
65. Kuhi, L. V. 1964, ApJ, 140, 1409
66. Kuhi, L. V. 1966, ApJ, 143, 991
67. Küker, M., Rüdiger, G., & Kichatinov, L. L. 1993, A&A, 279, L1
68. _. 1994, in ASP Conf. 64, Cool Stars, Stellar Systems, and the Sun, Eighth Cambridge Workshop, ed. J. P. Caillault (San Francisco: ASP), 199
69. Kursier, M., Ratzes, A. H., Pallavicini, R., & Randich, S. 1992, in ASP Conf. 26, Seventh Cambridge Workshop on Cool Stars, Stellar Systems, and the Sun, ed. M. Giampapa & J. Bookbinder (San Francisco: ASP), 249
70. Kurucz, R. L. 1993, CD-ROM 18: ATLAS9 Stellar Atmospheres Programs and 2 km/s Grid
71. Kurucz, R. L., Furenlid, I., Brault, J., & Testerman, L. 1984, National Solar Observatory Atlas no. 1: Solar Flux Atlas from 296 to 1300 nm (Sunspot: National Solar Obs.)
72. Kurucz, R. L., & Peytremann, E. 1975, A Table of Semi-Empirical gf Values, SAO Spec. Rep. 362
73. McCarthy, J, Sandiford, B., Boyd, D., & Booth, J. 1993, PASP, 105, 881
74. Moore, C. E, Minnaert, M. G. J, & Houtgast, J. 1966, The Solar Spectrum 2935 A to 8770 A, National Bureau of Standards Monograph 61 (Washington :GPO)
75. Natta, A., & Giovanardi, C. 1990, ApJ, 356, 646
76. O'Neal, D., Neff, J. E., & Saar, S. H. 1994, in ASP Conf. 64, Cool Stars, Stellar Systems, and the Sun, Eighth Cambridge Workshop, ed. J. P. Caillault (San Francisco: ASP), 726
77. Petrov, P. P., et al. 1995, in IAU Symp. 176, Stellar Surface Structure, ed. K. G. Strassmeier (Vienna: Univ. Vienna), 217
78. Petrov, P. P., Gullbring, E., Ilyin, I., Gahm, G. F., Tuominen, I., Hackman, T., & Loden, K. 1996, A&A, 314, 821
79. Piskunov, N. E., Kupka, F., Ryabchikova, T. A., Weiss, W. W., & Jeffery, C.S.1995, A&AS, 112, 525
80. Press, W. H., Flannery, B. P., Teukolsky, S. A., & Vetterling, W. T. 1986, Numerical Recipes: The Art of Scientific Computing (New York: Cambridge Univ. Press)
81. Pudritz, R. E, Pelletier, G., & Gomez de Castro, A. 1.1991, in The Physics of Star Fprmation and Early Stellar Evolution, ed. C. J. Lada & N. D. Kylafis (Dordrecht: Kluwer), 539
82. Rice, J. B. 1996, in IAU Symp. 176, Stellar Surface Structure, ed. K. G. Strassmeier & J. L. Linsky (Dordrecht: Kluwer), 19
83. Rice, J. B., & Strassmeier, K. G. 1996, A&A, 316, 164
84. Scargle, J. D. 1982, ApJ, 263, 835
85. Schüssler, M., & Solanki, S. K. 1992, A&A, 264, L13
86. Schüssler, M., Caligari, P., Ferriz-Mas, A., Solanki, S. K., & Stix, M. 1996, A&A, 314, 503
87. Shu, F. H., Najita, J., Ostriker, E, Wilkin, F., Rüden, S., & Lizano, S. 1994, ApJ, 429, 781
88. Smith, M. D. 1994, A&A, 287, 523
89. Snodgrass, H. B. 1983, ApJ, 270, 288
90. Strassmeier, K. G. 1994, A&A, 281, 395
91. Strassmeier, K. G., et al. 1991, A&A, 247, 130
92. Strassmeier, K. G., Welty, A. D., & Rice, J. B. 1994, A&A, 285, L17
93. Timothy, A. F., Krieger, A. S., & Vaiana, G. S. 1975, Sol. Phys., 42, 135
94. Ulrich, R. K. 1976, ApJ, 210, 377
95. Unruh, Y. C, Collier-Cameron, A., Guenther, E. 1995, in IAU Symp. 176, Stellar Surface Structure, ed. K. G. Strassmeier (Vienna: Univ. Vienna), 93
96. Valenti, J. A. 1994, Ph.D. thesis, Univ. California, Berkeley
97. Valenti, J. A., Basri, G., & Johns, C. M. 1993, AJ, 106, 2024
98. Valenti, J. A., & Piskunov, N. 1996, A&A, 118, 595
99. Vogt, S. S., & Hatzes, A. H. 1991, in IAU Colloq. 130, The Sun and Cool Stars: Activity, Magnetism, and Dynamos, ed. I. Tuominen, D. Moss, & G. Rüdiger (Berlin: Springer), 297
100. _. 1996, IAU Symp. 176, Stellar Surface Structure, ed. K. G. Strassmeier & J. L. Linsky (Dordrecht: Kluwer), 245
101. Vogt, S. S., & Peniod, G. D. 1983, PASP, 95, 565
102. Vogt, S. S., Penrod, G. D., & Hatzes, A. P. 1987, ApJ, 321, 496
103. Vrba, F. J., Chugainov, P. F., Weaver, W. B., & Stauffer, J. S. 1993, AJ, 106, 1608
104. Walter, F. M., et al. 1987, ApJ, 314, 297
105. Walter, F. M., Brown, A, Mathieu, R. D, Meyers, P. C, & Vrba, F. J. 1988, AJ, 96, 297
106. Wilcox, J. M., Schatten, K. H., Tanenbaum, A. S., & Howard, R. 1970, Sol. Phys., 14, 255