Skip to main content Accessibility help
×
Home

One solar cycle of solar astrometry with MDI/SOHO

  • Marcelo Emilio (a1), Jeff R. Kuhn (a2) and Rock I. Bush (a3)

Abstract

In this work we describe the method and results of precise solar astrometry made with the Michelson Doppler Imager (MDI), on board the Solar and Heliospheric Observatory (SOHO), during one complete solar cycle. We measured an upper limit to the solar radius variation, the absolute solar radius value and the solar shape. Our results are 22 mas peak-to-peak upper limit for the solar radius variation over the solar cycle, the absolute radius was measured as 959.28 ± 0.15 arcsec at 1 AU and the difference between polar and equatorial solar radii in 1997 was 5 km and about three times larger in 2001.

    • 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.

      One solar cycle of solar astrometry with MDI/SOHO
      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.

      One solar cycle of solar astrometry with MDI/SOHO
      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.

      One solar cycle of solar astrometry with MDI/SOHO
      Available formats
      ×

Copyright

References

Hide All
Brown, T. M. & Christensen-Dalsgarrd, J. 1998, ApJ, 500, L195
Dziembowski, W. A., Goode, P. R., Kosovichev, A. J., & Schou, J. 2001, ApJ, 553, 897
Emilio, M., Kuhn, J. R., Bush, R. I., & Scherrer, P. 2000, ApJ, 543, 1007
Emilio, M. & Leister, N. V. 2005, MNRAS, 361, 1005
Emilio, M., Bush, R. I., Kuhn, J. R., & Scherrer, P. 2007, ApJ, 660, L161
Gilliland, R. L. 1980, ApJ, 248, 1144
Kuhn, J. R., Bush, R. I., Scherrer, P., & Scheick, X. 1998, Nature, 392, 155
Kuhn, J. R., Bush, R. I., Emilio, M., & Scherrer, P. H. 2004, ApJ, 613, 1241
Kuhn, J. R., Emilio, M., & Bush, R. I. 2009, Science, 324, 1143-b
Laclare, F., Delmas, C., Coin, J. P., & Irbah, A. 1996, Solar Phys., 166, 211
Wittmann, A. D. & Bianda, M. 2000, In: Proceedings of the 1st Solar and Space Weather Euroconference, ESA SP 463, 113
Scherrer, P. H., Bogart, R. S., Bush, R. I., Hoeksema, J. T., Kosovichev, A. G., Schou, J., Rosenberg, W., Springer, L., Tarbell, T. D., Title, A., Wolfson, C. J., Zayer, I., & MDI Engineering Team 1995, Solar Phys., 162, 129
Schou, J., Kosovichev, A. G., Goode, P. R., & Dziembowski, W. A. 1997, ApJ, 489, 197
Shapiro, I. I. 1980, Science, 208, 51.
Ulrich, R. K. & Bertello, L. 1995, Nature, 377, 214
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