Hostname: page-component-848d4c4894-4hhp2 Total loading time: 0 Render date: 2024-05-05T01:36:13.641Z Has data issue: false hasContentIssue false
  • English
  • Français

Progress in the study of pulsating subdwarf B stars

Published online by Cambridge University Press:  27 October 2016

M. D Reed
M. D Reed*
Affiliation:
Department of Physics, Astronomy, & Materials Science, Missouri State University, 901 S National Ave, Springfield, MO, 65802USA email: mikereed@missouristate.edu
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

During Kepler's main mission, nearly 20 pulsating subdwarf B (sdB: extreme horizontal branch stars) were discovered. Many of these stars were observed for three years, accumulating over 1.5 million observations. Only through these extended observations have we been able to identify pulsation modes, applying constraints for structure models. Discoveries include nearly-evenly-spaced asymptotic period overtones which represent the interior structure and rotationally-induced frequency multiplets from which we have learned that rotation periods are long, even when in short-period binaries. This paper reviews progress on observational constraints and highlights some of our discoveries including radially differential rotation, conflicting stratification indicators and mode lifetimes.

Keywords

Keplerasteroseismology
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 11 , General Assembly A29B: Astronomy in Focus , August 2015 , pp. 589 - 595
Copyright
Copyright © International Astronomical Union 2016 

References

Aerts, C., Christensen-Dalsgaard, J., & Kurtz, D. W. 2010, Asteroseismology (1st ed. New York, Springer Astronomy & Astrophysics Library)CrossRefGoogle Scholar
Baran, A. S., Pigulski, A., & O'Toole, S. J. 2008, MNRAS, 385, 255 Google Scholar
Baran, A. S. & Winans, A. J. 2012, AcA, 62, 343 Google Scholar
Baran, A. S., et al. 2012, MNRAS, 424, 2686 CrossRefGoogle Scholar
Baran, A. S., Telting, J. H., Nemeth, P., Bachulski, Sz., & Krzesinski, J. 2015a, A&A, 573, 52 Google Scholar
Baran, A. S., Telting, J. H., Nemeth, P., Østensen, R. H., Reed, M. D., & Kiaeerad, F. 2015b, A&A, in press Google Scholar
Charpinet, S., FontaineA, G., Brassard, P., & Dorman, B. 2002, ApJS, 139, 487 Google Scholar
Charpinet, S., Fontaine, G., Brassard, P., & Green, E. M. 2011, Nature, 480, 496 CrossRefGoogle Scholar
Charpinet, S., Brassard, P., Van Grootel, V., & Fontaine, G. 2014 ASP-CS, 481, 179 Google Scholar
Foster, H. M., Reed, M. D., Telting, J. H., Østensen, R. H., & Baran, A. S. 2015 ApJ, 805, 94 Google Scholar
Heber, U. 1984, A&A, 130, 119 Google Scholar
Heber, U. 2009, ARAA, 47, 211 Google Scholar
Hu Haili, , Nelemans, G., Aerts, C., & Dupret, M.-A. 2009, A&A, 508, 869 Google Scholar
Jacobsen, E., & Lyons, R. 2003, IEEE, SPeL, 74 Google Scholar
Jenkins, J. et al. ApJL, 713, 87 CrossRefGoogle Scholar
Kilkenny, D. 2010, Ap&SS, 329, 175 Google Scholar
Ledeoux, P. 1951, ApJ, 114, 373 CrossRefGoogle Scholar
Miller Bertolami, M. M., Córsico, A. H., & Althaus, L. G. 2012, ASP-CS, 452, 175 Google Scholar
Moehler, S., Heber, U., Lemke, M., & Napiwotski, R. 1998, A&A, 339, 537 Google Scholar
Østensen, R.h. 2010 AN, 331, 1026 Google Scholar
Østensen, R. H., Telting, J. H., Reed, M. D., Baran, A. S., Nemeth, P., & Kiaeerad, F. 2014 A&A, 569, 15 Google Scholar
Pablo Herbert, , et al. 2012, MNRAS, 422, 1343 Google Scholar
Paxton, B., Bildsten, L., Dotter, A., Herwig, F., Lesaffre, P., & Timmes, F. 2011, ApJS, 192, 3 CrossRefGoogle Scholar
Reed, M. D. et al. (The Whole Earth Telescope Collaboration) 2004, MNRAS, 348, 1164 Google Scholar
Reed, M. D., et al. 2011, MNRAS, 414, 2885 Google Scholar
Reed, M. D., Foster, H., Telting, J. H., Østensen, R. H., Farris, L. H., Oreiro, R., & Baran, A. S. 2014 MNRAS, 440, 3809 CrossRefGoogle Scholar
Saffer, R. A., Bergeron, P., Koester, D., & Liebert, J. 1994 ApJ, 432, 351 Google Scholar
Unno, W., Osaki, Y., Ando, H., & Shibahashi, H. 1979, Nonradial Oscillations of Stars (Tokyo: University of Tokyo Press)Google Scholar
Van Grootel, V., Charpinet, S., Brassard, P., Fontaine, G., Green, E. M. 2013 A&A, 553, 97 Google Scholar