| Issue |
EPJ Web of Conferences
Volume 47, 2013
Hot Planets and Cool Stars
|
|
|---|---|---|
| Article Number | 05008 | |
| Number of page(s) | 9 | |
| Section | Radial Velocity | |
| DOI | https://doi.org/10.1051/epjconf/20134705008 | |
| Published online | 25 April 2013 | |
https://doi.org/10.1051/epjconf/20134705008
Multiplicity and properties of Kepler planet candidates: High spatial imaging and RV studies*
1 Centro Astronómico Hispano-Alemán (CAHA). Calar Alto Observatory, c/ Jesús Durbán Remón 2-2, 04004 Almería, Spain
2 Departamento de Astrofísica, Centro de Astrobiologíia, ESAC campus 28691 Villanueva de la Cañada (Madrid), Spain
3 Instituto de Astrofísica de Andalucía (IAA/CSIC), Glorieta de la Astronomía s/n Aptdo. 3004, 18080 Granada, Spain
a e-mail: barrado@cab.inta-csic.es
b e-mail: jlillo@cab.inta-csic.es
The Kepler space telescope is discovering thousands of new planet candidates. However, a follow up program is needed in order to reject false candidates and to fully characterize the bona-fide exoplanets. Our main aims are: 1./ Detect and analyze close companions inside the typical Kepler PSF to study if they are the responsible of the dim in the Kepler light curves, 2./ Study the change in the stellar and planetary parameters due to the presence of an unresolved object, 3./ Help to validate those Kepler Objects of Interest that do not present any object inside the Kepler PSF and 4./ Study the multiplicity rate in planet host candidates. Such a large sample of observed planet host candidates allows us to do statistics about the presence of close (visual or bounded) companions to the harboring star. We present here Lucky Imaging observations for a total amount of 98 Kepler Objects of Interest. This technique is based on the acquisition of thousands of very short exposure time images. Then, a selection and combination of a small amount of the best quality frames provides a high resolution image with objects having a 0.1 arcsec PSF. We applied this technique to carry out observations in the Sloan i and Sloan z filters of our Kepler candidates. We find blended objects inside the Kepler PSF for a significant percentage of KOIs. On one hand, only 58.2% of the hosts do not present any object within 6 arcsec. On the other hand, we have found 19 companions closer than 3 arcsec in 17 KOIs. According to their magnitudes and i − z color, 8 of them could be physically bounded to the host star. We are also collecting high-spectral resolution spectroscopuy in order to derive the planet properties.
© Owned by the authors, published by EDP Sciences, 2013
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 2.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.