Skip to main content Accessibility help
×
Home

Search for cool extrasolar giant planets combining coronagraphy, spectral and angular differential imaging

  • Anne-Lise Maire (a1), Anthony Boccaletti (a2), Julien Rameau (a3), Gaël Chauvin (a3), Anne-Marie Lagrange (a3), Mickaël Bonnefoy (a4), Silvano Desidera (a5), Mélody Sylvestre (a2), Pierre Baudoz (a2), Raphaël Galicher (a2) and David Mouillet (a3)...

Abstract

Spectral differential imaging (SDI) is part of the observing strategy of current and on-going high-contrast imaging instruments on ground-based telescopes. Although it improves the star light rejection, SDI attenuates the signature of off-axis companions to the star, just like angular differential imaging (ADI). However, the attenuation due to SDI has the peculiarity of being dependent on the spectral properties of the companions. To date, no study has investigated these effects. Our team is addressing this problem based on data from a direct imaging survey of 16 stars combining the phase-mask coronagraph, the SDI and the ADI modes of VLT/NaCo. The objective of the survey is to search for cool (Teff<1000-1300 K) giant planets at separations of 5-10 AU orbiting young, nearby stars (<200 Myr, <25 pc). The data analysis did not yield any detections. As for the estimation of the sensivity limits of SDI-processed images, we show that it requires a different analysis than that used in ADI-based surveys. Based on a method using the flux predictions of evolutionary models and avoiding the estimation of contrast, we determine directly the mass sensivity limits of the survey for the ADI processing alone and with the combination of SDI and ADI. We show that SDI does not systematically improve the sensitivity due to the spectral properties and self-subtraction of point sources.

    • 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.

      Search for cool extrasolar giant planets combining coronagraphy, spectral and angular differential imaging
      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.

      Search for cool extrasolar giant planets combining coronagraphy, spectral and angular differential imaging
      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.

      Search for cool extrasolar giant planets combining coronagraphy, spectral and angular differential imaging
      Available formats
      ×

Copyright

References

Hide All
Allard, F., Homeier, D., & Freytag, B. 2011, Proc. ASP, Vol. 448, 91
Beuzit, J.-L., Feldt, M., Dohlen, K., et al. 2008, Proc. SPIE, Vol. 7014, 701418
Biller, B. A., Close, L. M., Masciadri, E., et al. 2007, ApJS 173 143
Chauvin, G., Lagrange, A.-M., Bonavita, M., et al. 2010, A&A 509 A52
Lafrenière, D., Doyon, R., Marois, C., et al. 2007, ApJ 670 1367
Liu, M. C., Wahhaj, Z., Biller, B. A., et al. 2010, Proc. SPIE, Vol. 7736, 77361K
Macintosh, B., Graham, J., Palmer, D., et al. 2008, Proc. SPIE, Vol. 7015, 701518
Marois, C., Lafrenière, D., Doyon, R., Macintosh, B., & Nadeau, D. 2006, ApJ 6 556
Nielsen, E. L., Close, L. M., Biller, B. A., Masciadri, E., & Lenzen, R., ApJ 674 466
Racine, R., Walker, G. A. H., Nadeau, D., Doyon, R., & Marois, C., 1999, PASP 111 587
Vigan, A., Patience, J., Marois, C., et al. 2012, A&A 544 A9
MathJax
MathJax is a JavaScript display engine for mathematics. For more information see http://www.mathjax.org.

Keywords

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