C
Carl Ziegler
Researcher at University of Toronto
Publications - 164
Citations - 3973
Carl Ziegler is an academic researcher from University of Toronto. The author has contributed to research in topics: Planet & Exoplanet. The author has an hindex of 32, co-authored 123 publications receiving 2987 citations. Previous affiliations of Carl Ziegler include University of North Carolina at Chapel Hill & Stephen F. Austin State University.
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Journal ArticleDOI
197 candidates and 104 validated planets in K2's first five fields
Ian J. M. Crossfield,Ian J. M. Crossfield,David R. Ciardi,Erik A. Petigura,Evan Sinukoff,Joshua E. Schlieder,Joshua E. Schlieder,Andrew W. Howard,Charles A. Beichman,Howard Isaacson,Courtney D. Dressing,Jessie L. Christiansen,Benjamin J. Fulton,Sébastien Lépine,Lauren M. Weiss,Lea A. Hirsch,John H. Livingston,Christoph Baranec,Nicholas M. Law,Reed Riddle,Carl Ziegler,Steve B. Howell,Elliott P. Horch,Mark E. Everett,Johanna Teske,Arturo O. Martinez,Arturo O. Martinez,Christian Obermeier,Björn Benneke,Nic Scott,Niall R. Deacon,Kimberly M. Aller,Brad M. S. Hansen,Luigi Mancini,S. Ciceri,S. Ciceri,Rafael Brahm,Rafael Brahm,Andrés Jordán,Andrés Jordán,Heather A. Knutson,Thomas Henning,M. Bonnefoy,M. Bonnefoy,Michael C. Liu,Justin R. Crepp,Joshua D. Lothringer,Phil Hinz,Vanessa P. Bailey,Vanessa P. Bailey,Andrew J. Skemer,Andrew J. Skemer,Denis Defrere +52 more
TL;DR: In this article, the first year of the NASA K2 mission (Campaigns 0-4) was used to discover 197 candidates for Earth-like planets, with the results of an intensive program of photometric analyses, stellar spectroscopy, high-resolution imaging and statistical validation.
Journal ArticleDOI
Robotic Laser Adaptive Optics Imaging of 715 Kepler Exoplanet Candidates Using Robo-AO
Nicholas M. Law,Timothy D. Morton,Christoph Baranec,Reed Riddle,Ganesh Ravichandran,Carl Ziegler,John Asher Johnson,Shriharsh P. Tendulkar,Khanh Bui,Mahesh P. Burse,Hillol Das,Richard Dekany,Shrinivas R. Kulkarni,Sujit Punnadi,Anamparambu N. Ramaprakash +14 more
TL;DR: The Robo-AO Kepler Planetary Candidate Survey as mentioned in this paper is observing every Kepler planet candidate host star with laser adaptive optics imaging to search for blended nearby stars, which may be physically associated companions and/or responsible for transit false positives.
Journal ArticleDOI
SOAR TESS Survey. I. Sculpting of TESS Planetary Systems by Stellar Companions
TL;DR: In this paper, the authors used speckle imaging on SOAR to search for companions to 542 TESS planet candidate hosts in the Southern sky, and provided correction factors for the 117 systems with resolved companions due to photometric contamination.
Journal ArticleDOI
197 Candidates and 104 Validated Planets in K2's First Five Fields
Ian J. M. Crossfield,Ian J. M. Crossfield,David R. Ciardi,Erik A. Petigura,Evan Sinukoff,Joshua E. Schlieder,Joshua E. Schlieder,Andrew W. Howard,Charles A. Beichman,Howard Isaacson,Courtney D. Dressing,Jessie L. Christiansen,Benjamin J. Fulton,Sébastien Lépine,Lauren M. Weiss,Lea A. Hirsch,John H. Livingston,Christoph Baranec,Nicholas M. Law,Reed Riddle,Carl Ziegler,Steve B. Howell,Elliott P. Horch,Mark E. Everett,Johanna Teske,Arturo O. Martinez,Arturo O. Martinez,Christian Obermeier,Björn Benneke,Nic Scott,Niall R. Deacon,Kimberly M. Aller,Brad M. S. Hansen,Luigi Mancini,S. Ciceri,S. Ciceri,Rafael Brahm,Rafael Brahm,Andrés Jordán,Andrés Jordán,Heather A. Knutson,Thomas Henning,M. Bonnefoy,M. Bonnefoy,Michael C. Liu,Justin R. Crepp,Joshua D. Lothringer,Phil Hinz,Vanessa P. Bailey,Vanessa P. Bailey,Andrew J. Skemer,Andrew J. Skemer,Denis Defrere +52 more
TL;DR: In this article, the first year of the NASA K2 mission (Campaigns 0-4) was used to discover 197 candidates for Earth-like terrestrial worlds, with median values of R_P = 2.3 R_E, P=8.6 d, Tef = 5300 K, and Kp=12.7 mag.
Journal ArticleDOI
The First Naked-eye Superflare Detected from Proxima Centauri
Ward S. Howard,Matt A. Tilley,Hank Corbett,Allison Youngblood,R. O. Parke Loyd,Jeffrey K. Ratzloff,Nicholas M. Law,Octavi Fors,Octavi Fors,Daniel del Ser,Daniel del Ser,Evgenya L. Shkolnik,Carl Ziegler,Erin Goeke,Aaron D. Pietraallo,J. B. Haislip +15 more
TL;DR: In this article, the photochemical effects of NOx atmospheric species generated by particle events from Proxima Centauri's extreme stellar activity were modeled and shown that the repeated flaring may be sufficient to reduce the ozone of an Earth-like atmosphere by 90% within five years.