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David R. Ciardi
Researcher at California Institute of Technology
Publications - 714
Citations - 55938
David R. Ciardi is an academic researcher from California Institute of Technology. The author has contributed to research in topics: Planet & Exoplanet. The author has an hindex of 106, co-authored 650 publications receiving 50360 citations. Previous affiliations of David R. Ciardi include University of Wyoming & Association of Universities for Research in Astronomy.
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Journal ArticleDOI
The gj 436 system: directly determined astrophysical parameters of an m dwarf and implications for the transiting hot neptune
Kaspar von Braun,Tabetha S. Boyajian,Stephen R. Kane,Leslie Hebb,Gerard T. van Belle,Chris Farrington,David R. Ciardi,Heather A. Knutson,T. ten Brummelaar,Mercedes Lopez-Morales,Mercedes Lopez-Morales,Harold A. McAlister,Gail H. Schaefer,Stephen T. Ridgway,Andrew Collier Cameron,P. J. Goldfinger,Nils H. Turner,Laszlo Sturmann,Judit Sturmann +18 more
TL;DR: In this article, the late-type dwarf GJ 436 is known to host a transiting Neptune-mass planet in a 2.6 day orbit, and the authors present results of their interferometric measurements to directly determine the stellar diameter (R_* = 0.455 ± 0.018 R_☉) and effective temperature (T_(EFF) = 3416 ± 54 K).
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Kepler-10c, a 2.2-Earth radius transiting planet in a multiple system
Francois Fressin,Guillermo Torres,Jean-Michel Desert,David Charbonneau,Natalie M. Batalha,Jonathan J. Fortney,Jason F. Rowe,Christopher C. R. Allen,William J. Borucki,Timothy M. Brown,Stephen T. Bryson,David R. Ciardi,William D. Cochran,Drake Deming,Edward W. Dunham,Daniel C. Fabrycky,Thomas Gautier,Ronald L. Gilliland,Christopher E. Henze,Matthew J. Holman,Steve B. Howell,Jon M. Jenkins,Karen Kinemuchi,Heather Knutson,David G. Koch,David W. Latham,Jack J. Lissauer,Geoffrey W. Marcy,Darin Ragozzine,Dimitar Sasselov,Martin Still,Peter Tenenbaum,Kamal Uddin +32 more
TL;DR: In this article, the authors apply the light-curve modeling technique known as BLENDER to explore the possibility that the signal might be due to an astrophysical false positive (blend), and arrive conservatively at a false alarm rate of 1.6 × 10-5 that is small enough to validate the candidate as a planet (designated Kepler-10 c) with a very high level of confidence.
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Astrophysical parameters and habitable zone of the exoplanet hosting star gj 581
Kaspar von Braun,Tabetha S. Boyajian,Stephen R. Kane,Gerard T. van Belle,David R. Ciardi,Mercedes Lopez-Morales,Mercedes Lopez-Morales,Harold A. McAlister,Todd J. Henry,Wei-Chun Jao,Adric R. Riedel,John P. Subasavage,Gail H. Schaefer,T. ten Brummelaar,Stephen T. Ridgway,Laszlo Sturmann,Judit Sturmann,Jude Mazingue,Nils H. Turner,Chris Farrington,P. J. Goldfinger,Andrew F. Boden +21 more
TL;DR: In this article, the location and extent of the system's habitable zone were estimated from the CHARA array and trigonometric parallax information, and it was shown that two of the planets orbiting GJ 581, planets d and g, spend all or part of their orbit within or just on the edge of the habitable zone.
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Explorations beyond the snow line: spitzer/irs spectra of debris disks around solar-type stars
Samantha Lawler,Samantha Lawler,Samantha Lawler,Chas Beichman,Geoffrey Bryden,David R. Ciardi,Angelle Tanner,Kate Y. L. Su,Karl R. Stapelfeldt,Carey M. Lisse,David E. Harker +10 more
TL;DR: In this paper, the authors observed 152 nearby solar-type stars with the Infrared Spectrometer (IRS) on the Spitzer Space Telescope and obtained an overall success rate for finding excesses in the long-wavelength IRS band (30-34 μm) of 11.8% ± 2.4%.
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Constraints on Circumstellar Disk Parameters from Multiwavelength Observations: T Tauri and SU Aurigae
TL;DR: In this paper, the physical properties of the disk are examined by calculating parameter probabilities based on a passive, flat-disk model for two pre-main-sequence objects, T Tau and SU Aur.