Why does the spotted UX Ari system get bluer as it gets darker?

Astronomy and Astrophysics

Volumn 399, Issue 1, 2003, Pages

  Ulvås, V Aarum ^a   Engvold, O ^a  

^a UNIVERSITY OF OSLO   (Norway)

Author keywords

Binaries: spectroscopic; Stars: activity; Stars: individual: UX Ari; Stars: late type; Starspots

Indexed keywords

CALCULATIONS; COLOR; GALAXIES; PHOTOMETRY; SPECTROSCOPIC ANALYSIS; SURFACES; TEMPERATURE;

COLOR BRIGHTNESS; LATE TYPE; STAR SPOTS; STARS;

ASTRONOMY;

EID: 0037324343     PISSN: 00046361     EISSN: None     Source Type: Journal    
DOI: 10.1051/0004-6361:20030085     Document Type: Letter

References (23)

1. Aarum Ulvås, V., & Engvold, O. 2003, A&A, in press
2. Aarum Ulvås, V., & Henry, G. W. 2003, A&A, submitted
3. Allen, C. W. 1973, Astrophysical quantities, 3rd edn. (University of London: Athlone Press)
4. Barnes, T. G., & Evans, D. S. 1976, MNRAS, 174, 489
5. Carlos, R., & Popper, D. M. 1971, PASP, 83, 504
6. Cox, A. N., ed. 2000. Allen's Astrophysical Quantities (New York: Springer)
7. Duemmler, R., & Aarum, V. 2001, A&A, 370, 974
8. ESA 1997, The Hipparcos and Tycho catalogues, Vol. 1-17, ESA-SP-1200
9. Fabricius, C., & Makarov, V. V. 2000, A&A, 356, 141
10. Gray, D. 1992, The observation and analysis of stellar photospheres, 2nd edn. (Cambridge University Press)
11. Hall, D. S. 1977, Acta Astron., 27, 281
12. Hall, D. S., Montle, R. E., & Atkins, H. L. 1975, Acta Astron., 25, 125
13. Mohin, S., & Raveendran, A. V. 1989, JApA, 10, 35
14. Padmakar, S. P., & Pandey, S. K. 1996, Ap&SS, 235, 337
15. Poe, C. H., & Eaton, J. A. 1985, ApJ, 289, 644
16. Raveendran, A. V., & Mohin, S. 1995, A&A, 301, 788
17. Rodonò, M., & Cutispoto, G. 1992, A&AS, 95, 55
18. Sarma, M. B. K., & Prakasa Rao, B. V. N. S. 1984, JApA, 5, 159
19. Strassmeier, K. G., Hall, D. S., Boyd, L. J., & Genet, R. M. 1989, ApJS, 69, 141
20. Strassmeier, K. G., Hall, D. S., Fekel, F. C., & Scheck, M. 1993, A&AS, 100, 173
21. Vogt, S. S., & Hatzes, A. P. 1991, in The Sun and Cool Stars: activity, magnetism, dynamos, ed. I. Tuominen, D. Moss, & G. Rüdiger, IAU Coll., 130 (Springer-Verlag), 297
22. Wacker, S. W., Guinan, E. F., McCook, G. P., Lochner, J. C., & Paczkowski, B. G. 1986, Inf. Bull. Var. Stars, 2920
23. Zeilik, M., Elston, R., Henson, G., Schmolke, P., & Smith, P. 1982, Inf. Bull. Var. Stars, 2168