TY - JOUR
T1 - An all-sky catalogue of solar-type dwarfs for exoplanetary transit surveys
AU - Nascimbeni, V.
AU - Piotto, G.
AU - Ortolani, S.
AU - Giuffrida, G.
AU - Marrese, P. M.
AU - Magrin, D.
AU - Ragazzoni, R.
AU - Pagano, I.
AU - Rauer, H.
AU - Cabrera, J.
AU - Pollacco, D.
AU - Heras, A. M.
AU - Deleuil, M.
AU - Gizon, L.
AU - Granata, V.
N1 - Publisher Copyright:
© 2016 The Authors.
PY - 2016/12
Y1 - 2016/12
N2 - Most future surveys designed to discover transiting exoplanets, including TESS and PLATO, will target bright (V≲13) and nearby solar-type stars having a spectral type later than F5. In order to enhance the probability of identifying transits, these surveys must cover a very large area on the sky, because of the intrinsically low areal density of bright targets. Unfortunately, no existing catalogue of stellar parameters is both deep and wide enough to provide a homogeneous input list. As the first Gaia data release exploitable for this purpose is expected to be released not earlier than late 2017, we have devised an improved reduced-propermotion (RPM) method to discriminate late field dwarfs and giants by combining the fourth U.S. Naval Observatory CCD Astrograph Catalog (UCAC4) proper motions with AAVSO Photometric All-Sky Survey DR6 photometry, and relying on Radial Velocity Experiment DR4 as an external calibrator. The output, named UCAC4-RPM, is a publicly available, complete all-sky catalogue of solar-type dwarfs down to V≃13.5, plus an extension to log g>3.0 subgiants. The relatively low amount of contamination (defined as the fraction of false positives; <30 per cent) also makes UCAC4-RPM a useful tool for the past and ongoing ground-based transit surveys, which need to discard candidate signals originating from early-type or giant stars. As an application, we show how UCAC4-RPM may support the preparation of the TESS (that will map almost the entire sky) input catalogue and the input catalogue of PLATO, planned to survey more than half of the whole sky with exquisite photometric precision.
AB - Most future surveys designed to discover transiting exoplanets, including TESS and PLATO, will target bright (V≲13) and nearby solar-type stars having a spectral type later than F5. In order to enhance the probability of identifying transits, these surveys must cover a very large area on the sky, because of the intrinsically low areal density of bright targets. Unfortunately, no existing catalogue of stellar parameters is both deep and wide enough to provide a homogeneous input list. As the first Gaia data release exploitable for this purpose is expected to be released not earlier than late 2017, we have devised an improved reduced-propermotion (RPM) method to discriminate late field dwarfs and giants by combining the fourth U.S. Naval Observatory CCD Astrograph Catalog (UCAC4) proper motions with AAVSO Photometric All-Sky Survey DR6 photometry, and relying on Radial Velocity Experiment DR4 as an external calibrator. The output, named UCAC4-RPM, is a publicly available, complete all-sky catalogue of solar-type dwarfs down to V≃13.5, plus an extension to log g>3.0 subgiants. The relatively low amount of contamination (defined as the fraction of false positives; <30 per cent) also makes UCAC4-RPM a useful tool for the past and ongoing ground-based transit surveys, which need to discard candidate signals originating from early-type or giant stars. As an application, we show how UCAC4-RPM may support the preparation of the TESS (that will map almost the entire sky) input catalogue and the input catalogue of PLATO, planned to survey more than half of the whole sky with exquisite photometric precision.
KW - Catalogues
KW - Methods: statistical
KW - Planetary systems
KW - Stars: solar-type
KW - Stars: statistics
UR - http://www.scopus.com/inward/record.url?scp=85043252561&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85043252561&partnerID=8YFLogxK
U2 - 10.1093/mnras/stw2313
DO - 10.1093/mnras/stw2313
M3 - Article
AN - SCOPUS:85043252561
SN - 0035-8711
VL - 463
SP - 4210
EP - 4222
JO - Monthly Notices of the Royal Astronomical Society
JF - Monthly Notices of the Royal Astronomical Society
IS - 4
ER -