Skip to main content Accessibility help
×
Home

Interferometric studies of rapid rotators

  • Ming Zhao (a1), John D. Monnier (a2) and Xiao Che (a2)

Abstract

Stellar rotation, like stellar mass and metallicity, is a fundamental property of stars. Rapid rotation distorts the stellar photosphere and affects a star's luminosity, abundances and evolution. It is also linked to stellar wind and mass loss. The distortion of the stellar photosphere due to rapid rotation causes the stellar surface brightness and effective temperature to vary with latitude, leading to a bright pole and a dark equator - a phenomenon known as ‘Gravity Darkening’. Thanks to the development of long baseline optical interferometry in recent years, optical interferometers have resolved the elongation of rapidly rotating stars, and have even imaged a few systems for the first time, directly confirming the gravity darkening effect. In this paper, we review the recent interferometric studies of rapid rotators, particularly the imaging results from CHARA-MIRC. These sub-milliarcsecond resolution observations permit the determination of the inclination, the polar and equatorial radius and temperature, as well as the fractional rotation speed of several rapid rotators with unprecedented precision. The modeling also allows the determination of the true effective temperatures and luminosities of these stars, permitting the investigation of their true locations on the HR diagram. Discrepancies from standard models were also found in some measurements, suggesting the requirement of more sophisticated mechanisms such as non-uniform rotation in the model. These observations have demonstrated that optical interferometry is now sufficiently mature to provide valuable constraints and even model-independent images to shed light on the basic physics of stars.

    • Send article to Kindle

      To send this article to your Kindle, first ensure no-reply@cambridge.org is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about sending to your Kindle. Find out more about sending to your Kindle.

      Note you can select to send to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be sent to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.

      Find out more about the Kindle Personal Document Service.

      Interferometric studies of rapid rotators
      Available formats
      ×

      Send article to Dropbox

      To send this article to your Dropbox account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your <service> account. Find out more about sending content to Dropbox.

      Interferometric studies of rapid rotators
      Available formats
      ×

      Send article to Google Drive

      To send this article to your Google Drive account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your <service> account. Find out more about sending content to Google Drive.

      Interferometric studies of rapid rotators
      Available formats
      ×

Copyright

References

Hide All
Abt, H. A., Levato, H., & Grosso, M. 2002, ApJ, 573, 359
Abt, H. A. & Morrell, N. I. 1995, ApJS, 99, 135
Aufdenberg, J. P., Mérand, A., Coudé du Foresto, V., Absil, O. et al. 2006, ApJ, 645, 664
Bohlin, R. C. & Gililand, R. L. 2004, AJ, 127, 3508
Burrows, A., Dessart, L., Livne, E., Ott, C. D. et al. 2007, ApJ, 664, 416
Claret, A. 2003, A&A, 406, 623
Cotton, W., Monnier, J., Baron, F., Hofmann, K.-H. et al. 2008, in: (eds.), Society of Photo-Optical Instrumentation Engineers (SPIE) Conference Series 7013
Cranmer, S. R. & Owocki, S. P. 1995, ApJ, 440, 308
Demarque, P., Woo, J.-H., Kim, Y.-C., & Yi, S. K. 2004, ApJS, 155, 667
Domiciano de Souza, A., Kervella, P., Jankov, S., Abe, L. et al. 2003, A&A, 407, L47
Domiciano de Souza, A., Kervella, P., Jankov, S., Vakili, F. et al. 2005, A&A, 442, 567
Domiciano de Souza, A. 2009, in: Rozelot, J.-P. & Neiner, C. (eds.), The Rotation of Sun and Stars, Lecture Notes in Physics 765 (BerlinSpringer Verlag), p. 171
Frémat, Y., Zorec, J., Hubert, A.-M., & Floquet, M. 2005, A&A, 440, 305
Gies, D. R., Dieterich, S., Richardson, N. D., Riedel, A. R. et al. 2008, ApJ (Letters), 682, L117
Gizon, L. & Solanki, S. K. 2004, Solar Phys., 220, 169
Gray, R. O., Corbally, C. J., Garrison, R. F., McFadden, M. T. et al. 2003, AJ, 126, 2048
Gray, R. O., Napier, M. G., & Winkler, L. I. 2001, AJ, 121, 2148
Gulliver, A. F., Hill, G. & Adelman, S. J. 1994, ApJ (Letters), 429, L81
Hill, G., Gulliver, A. F. & Adelman, S. J. 2004, in: Zverko, J., Ziznovsky, J., Adelman, S. J., & Weiss, W. W. (eds.), The A-Star Puzzle, IAU Symposium 224, p. 35
Hill, G., Gulliver, A. F., & Adelman, S. J. 2010, ApJ, 712, 250
Högbom, J. A. 1974, A&AS, 15, 417
Ireland, M. J., Monnier, J. D., & Thureau, N. 2006, in: (eds.), Society of Photo-Optical Instrumentation Engineers (SPIE) Conference Series 6268
Jackson, S., MacGregor, K. B., & Skumanich, A. 2004, ApJ, 606, 1196
Jankov, S., Vakili, F., Domiciano de Souza, A. Jr., & Janot-Pacheco, E. 2001, A&A, 377, 721
Johnson, H. L. & Morgan, W. W. 1953, ApJ, 117, 313
Kanaan, S., Meilland, A., Stee, P., Zorec, J. et al. 2008, A&A, 486, 785
Kervella, P. & Domiciano de Souza, A. 2006, A&A, 453, 1059
Kurucz, R. L. 1993, VizieR Online Data Catalog, 6039
Lucy, L. B. 1967, ZfA, 65, 89
MacFadyen, A. I., Woosley, S. E., & Heger, A. 2001, ApJ, 550, 410
Maeder, A. & Meynet, G. 2000, ARAA, 38, 143
Maeder, A., Meynet, G., & Ekström, S. 2007, in: Vallenari, A., Tantalo, R., Portinari, L., & Moretti, A. (eds.), From Stars to Galaxies: Building the Pieces to Build Up the Universe, ASP-CS 374, p. 13
MacGregor, K. B., Jackson, S., Skumanich, A., & Metcalfe, T. S. 2007, ApJ, 663, 560
Malbet, F., et al. 2010, in: Danchi, W. C., Delplancke, F. & Rajagopal, J. K. (eds.), Optical and Infrared Interferometry, SPIE Conference Series 7734, 138
Mason, B. D., Martin, C., Hartkopf, W. I., Barry, D. J. et al. 1999, AJ, 117, 1890
McAlister, H. A., ten Brummelaar, T. A., Gies, D. R., Huang, W. et al. 2005, ApJ, 628, 439
Millward, C. G. & Walker, G. A. H. 1985, ApJS, 57, 63
Monnier, J. D. 2003, Reports on Progress in Physics, 66, 789
Monnier, J. D., Berger, J.-P., Millan-Gabet, R. & ten Brummelaar, T. A. 2004, in: Traub, W. A. (eds.), New Frontiers in Stellar Interferometry, SPIE Conference Series 5491, p. 1370
Monnier, J. D., Zhao, M., Pedretti, E., Thureau, N. et al. 2007, Science, 317, 342
Monnier, J. D., Townsend, R. H. D., Che, X., Zhao, M. et al. 2010, ApJ, 725, 1192
Narayan, R. & Nityananda, R. 1986, ARAA, 24, 127
Ohishi, N., Nordgren, T. E., & Hutter, D. J. 2004, ApJ, 612, 463
Petrov, R. G., Malbet, F., Weigelt, G., Antonelli, P. et al. 2007, A&A, 464, 1
Peterson, D. M., Hummel, C. A., Pauls, T. A., Armstrong, J. T. et al. 2006, Nature, 440, 896
Pinsonneault, M. 1997, ARAA, 35, 557
Rhee, J. H., Song, I., Zuckerman, B., & McElwain, M. 2007, ApJ, 660, 1556
Simon, T., Ayres, T. R., Redfield, S., & Linsky, J. L. 2002, ApJ, 579, 800
Thiébaut, E. 2008, in: Schöller, M., Danchi, W. C. & Delplancke, F. (eds.), Optical and Infrared Interferometry, SPIE Conference Series 7013, p. 43
Thompson, A. R., Moran, J. M., & Swenson, G. W. 1986, Interferometry and synthesis in radio astronomy, New York, Wiley-Interscience
van Belle, G. T., Ciardi, D. R., ten Brummelaar, T., McAlister, H. A. et al. 2006, ApJ, 637, 494
van Belle, G. T., Ciardi, D. R., Thompson, R. R., Akeson, R. L. et al. 2001, ApJ, 559, 1155
Vinicius, M. M. F., Zorec, J., Leister, N. V., & Levenhagen, R. S. 2006, A&A, 446, 643
von Zeipel, H. 1924a, MNRAS, 84, 665
von Zeipel, H. 1924b, MNRAS, 84, 684
Wagman, N. E. 1946, AJ, 52Q, 50
Walter, F. M., Matthews, L. D., & Linsky, J. L. 1995, ApJ, 447, 353
Yoon, J., Peterson, D. M., Zagarello, R. J., Armstrong, J. T. et al. 2008, ApJ, 681, 570
Zahn, J.-P., Ranc, C., & Morel, P. 2010, A&A, 517, A7+
Zhao, M., Gies, D., Monnier, J. D., Thureau, N. et al. 2008, ApJ (Letters), 684, L95
Zhao, M., Monnier, J. D., Pedretti, E., Thureau, N. et al. 2009, ApJ, 701, 209
MathJax
MathJax is a JavaScript display engine for mathematics. For more information see http://www.mathjax.org.

Keywords

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed