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  1. OA@INAF
  2. PRODOTTI RICERCA INAF
  3. 1 CONTRIBUTI IN RIVISTE (Journal articles)
  4. 1.01 Articoli in rivista
Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/28475
Title: SPOTS: The Search for Planets Orbiting Two Stars. III. Complete sample and statistical analysis
Authors: Asensio-Torres, R.
Janson, M.
Bonavita, M.
DESIDERA, Silvano 
Thalmann, C.
Kuzuhara, M.
Henning, Th.
Marzari, F.
Meyer, M. R.
Calissendorff, P.
Uyama, T.
Issue Date: 2018
Journal: ASTRONOMY & ASTROPHYSICS 
Number: 619
First Page: A43
Abstract: Binary stars constitute a large percentage of the stellar population, yet relatively little is known about the planetary systems orbiting them. Most constraints on circumbinary planets (CBPs) so far come from transit observations with the Kepler telescope, which is sensitive to close-in exoplanets but does not constrain planets on wider orbits. However, with continuous developments in high-contrast imaging techniques, this population can now be addressed through direct imaging. We present the full survey results of the Search for Planets Orbiting Two Stars (SPOTS) survey, which is the first direct imaging survey targeting CBPs. The SPOTS observational program comprises 62 tight binaries that are young and nearby, and thus suitable for direct imaging studies, with VLT/NaCo and VLT/SPHERE. Results from SPOTS include the resolved circumbinary disk around AK Sco, the discovery of a low-mass stellar companion in a triple packed system, the relative astrometry of up to 9 resolved binaries, and possible indications of non-background planetary-mass candidates around HIP 77911. We did not find any CBP within 300 AU, which implies a frequency upper limit on CBPs (1-15 M<SUB>Jup</SUB>) of 6-10% between 30-300 AU. Coupling these observations with an archival dataset for a total of 163 stellar pairs, we find a best-fit CBP frequency of 1.9% (2-15 M<SUB>Jup</SUB>) between 1 and 300 AU with a 10.5% upper limit at a 95% confidence level. This result is consistent with the distribution of companions around single stars. <P />Based on observations collected at the European Organisation for Astronomical Research in the Southern Hemisphere under ESO programmes 088.C-0291(A), 090.C-0416(A), 090.C-0416(B), 095.C-0346(A), 095.C-0346(B), 097.C-0079(A), and 097.C-0079(B).
URI: http://hdl.handle.net/20.500.12386/28475
URL: https://www.aanda.org/articles/aa/abs/2018/11/aa33349-18/aa33349-18.html
ISSN: 0004-6361
DOI: 10.1051/0004-6361/201833349
Bibcode ADS: 2018A&A...619A..43A
Fulltext: open
Appears in Collections:1.01 Articoli in rivista

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