Skip to main content Accessibility help
×
Home

High-resolution spectropolarimetry of κ Cet: A proxy for the young Sun

  • J. D. do Nascimento (a1), P. Petit (a2), M. Castro (a1), G. F. Porto de Mello (a3), S. V. Jeffers (a4), S. C. Marsden (a5), I. Ribas (a6), E. Guinan (a7) and the Bcool Collaboration...

Abstract

κ1 Cet (HD 20630, HIP 15457, d = 9.16 pc, V = 4.84) is a dwarf star approximately 30 light-years away in the equatorial constellation of Cetus. Among the solar proxies studied in the Sun in Time, κ1 Cet stands out as potentially having a mass very close to solar and a young age. On this study, we monitored the magnetic field and the chromospheric activity from the Ca II H & K lines of κ1 Cet. We used the technique of Least-Square-Deconvolution (LSD, Donati et al. 1997) by simultaneously extracting the information contained in all 8,000 photospheric lines of the echelogram (for a linelist matching an atmospheric model of spectral type K1). To reconstruct a reliable magnetic map and characterize the surface differential rotation of κ1 Cet we used 14 exposures spread over 2 months, in order to cover at least two rotational cycles (Prot ~9.2 days). The Least Square deconvolution (LSD) technique was applied to detect the Zeeman signature of the magnetic field in each of our 14 observations and to measure its longitudinal component. In order to reconstruct the magnetic field geometry of κ1 Cet, we applied the Zeeman Doppler Imaging (ZDI) inversion method. ZDI revealed a structure in the radial magnetic field consisting of a polar magnetic spot. On this study, we present the fisrt look results of a high-resolution spectropolarimetric campaign to characterize the activity and the magnetic fields of this young solar proxy.

    • 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.

      High-resolution spectropolarimetry of κ Cet: A proxy for the young Sun
      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.

      High-resolution spectropolarimetry of κ Cet: A proxy for the young Sun
      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.

      High-resolution spectropolarimetry of κ Cet: A proxy for the young Sun
      Available formats
      ×

Copyright

References

Hide All
Donati, J.-F., Semel, M., Carter, B. D., et al. 1997, MNRAS, 291, 658
Morgenthaler, A., Petit, P., Saar, S., Solanki, S. K., et al. 2012, ApJ, 540, 138
Ribas, I., Guinan, E. & Güdel Audard, M. 2005, ApJ, 722, 680
Ribas, I., Porto de Mello, G. F., Ferreira, L. D., Hebrard, E., et al. 2010, ApJ, 714, 384
Wright, J. T., Marcy, G. W., Butler, R. P., Vogt, S. S., et al. 2004, ApJS, 152, 261
MathJax
MathJax is a JavaScript display engine for mathematics. For more information see http://www.mathjax.org.

Keywords

High-resolution spectropolarimetry of κ Cet: A proxy for the young Sun

  • J. D. do Nascimento (a1), P. Petit (a2), M. Castro (a1), G. F. Porto de Mello (a3), S. V. Jeffers (a4), S. C. Marsden (a5), I. Ribas (a6), E. Guinan (a7) and the Bcool Collaboration...

Metrics

Altmetric attention score

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