TY - JOUR
T1 - How complete are surveys for nearby transiting hot Jupiters?
AU - Yee, Samuel W.
AU - Winn, Joshua N.
AU - Hartman, Joel D.
N1 - Funding Information:
This research made use of the NASA Exoplanet Archive, which is operated by the California Institute of Technology, under contract with the National Aeronautics and Space Administration under the Exoplanet Exploration Program. The work also made use of data from the European Space Agency (ESA) mission Gaia (https://www.cosmos.esa.int/gaia), processed by the Gaia Data Processing and Analysis Consortium (DPAC; https://www. cosmos.esa.int/web/gaia/dpac/consortium). Funding for the DPAC has been provided by national institutions, in particular the institutions participating in the Gaia Multilateral Agreement. Work by S.W.Y. and J.N.W. was funded by the Heising-Simons Foundation and the TESS project (NASA contract NNG14FC03C). J.H. acknowledges support from the TESS GI Program, programs G011103 and G022117, through NASA grants 80NSSC19K0386 and 80NSSC19K1728.
Publisher Copyright:
© 2021. The American Astronomical Society. All rights reserved.
PY - 2021/12/1
Y1 - 2021/12/1
N2 - Hot Jupiters are a rare and interesting outcome of planet formation. Although more than 500 hot Jupiters (HJs) are known, most of them were discovered by a heterogeneous collection of surveys with selection biases that are difficult to quantify. Currently, our best knowledge of HJ demographics around FGK stars comes from the sample of ~40 objects detected by the Kepler mission, which have a well-quantified selection function. Using the Kepler results, we simulate the characteristics of the population of nearby transiting HJs. A comparison between the known sample of nearby HJs and simulated magnitude-limited samples leads to four conclusions. (1) The known sample of HJs appears to be ≈75% complete for stars brighter than Gaia G ≲ 10.5, falling to ≲50% for G ≲ 12. (2) There are probably a few undiscovered HJs with host stars brighter than G≈ 10 located within 10° of the Galactic plane. (3) The period and radius distributions of HJs may differ for F-type hosts (which dominate the nearby sample) and G-type hosts (which dominate the Kepler sample). (4) To obtain a magnitude-limited sample of HJs that is larger than the Kepler sample by an order of magnitude, the limiting magnitude should be approximately G≈ 12.5. This magnitude limit is within the range for which NASA's Transiting Exoplanet Survey Satellite can easily detect HJs, presenting the opportunity to greatly expand our knowledge of hot-Jupiter demographics.
AB - Hot Jupiters are a rare and interesting outcome of planet formation. Although more than 500 hot Jupiters (HJs) are known, most of them were discovered by a heterogeneous collection of surveys with selection biases that are difficult to quantify. Currently, our best knowledge of HJ demographics around FGK stars comes from the sample of ~40 objects detected by the Kepler mission, which have a well-quantified selection function. Using the Kepler results, we simulate the characteristics of the population of nearby transiting HJs. A comparison between the known sample of nearby HJs and simulated magnitude-limited samples leads to four conclusions. (1) The known sample of HJs appears to be ≈75% complete for stars brighter than Gaia G ≲ 10.5, falling to ≲50% for G ≲ 12. (2) There are probably a few undiscovered HJs with host stars brighter than G≈ 10 located within 10° of the Galactic plane. (3) The period and radius distributions of HJs may differ for F-type hosts (which dominate the nearby sample) and G-type hosts (which dominate the Kepler sample). (4) To obtain a magnitude-limited sample of HJs that is larger than the Kepler sample by an order of magnitude, the limiting magnitude should be approximately G≈ 12.5. This magnitude limit is within the range for which NASA's Transiting Exoplanet Survey Satellite can easily detect HJs, presenting the opportunity to greatly expand our knowledge of hot-Jupiter demographics.
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U2 - 10.3847/1538-3881/ac2958
DO - 10.3847/1538-3881/ac2958
M3 - Article
AN - SCOPUS:85119658661
SN - 0004-6256
VL - 162
JO - Astronomical Journal
JF - Astronomical Journal
IS - 6
M1 - 240
ER -