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One of the biggest challenges facing large transit surveys is the elimination of false-positives from the vast number of transit candidates. We investigate to what extent information from the lightcurves can identify blend scenarios and…

Earth and Planetary Astrophysics · Physics 2015-06-05 S. V. Nefs , I. A. G. Snellen , E. J. W. de Mooij

Detection of transiting exoplanets around young stars is more difficult than for older systems due to increased stellar variability. Nine young open cluster planets have been found in the K2 data, but no single analysis pipeline identified…

Earth and Planetary Astrophysics · Physics 2017-11-29 Aaron C. Rizzuto , Andrew W. Mann , Andrew Vanderburg , Adam L. Kraus , Kevin R. Covey

The Kepler Mission is uniquely suited to study the frequencies of extrasolar planets. This goal requires knowledge of the incidence of false positives such as eclipsing binaries in the background of the targets, or physically bound to them,…

We propose a method to distinguish between planetary and stellar companions to stars which present a periodic decrease in brightness, interpreted as a transit. Light curves from a total of 177 stars from the OGLE project were fitted by the…

Astrophysics · Physics 2009-11-11 Adriana V. R. Silva , Patricia C. Cruz

Using the cumulative catalog of planets detected by the NASA Kepler mission, we reconstruct the intrinsic occurrence of Earth- to Neptune-size (1 - 4$R_{\oplus}$) planets and their distributions with radius and orbital period. We analyze…

Earth and Planetary Astrophysics · Physics 2015-06-22 Ari Silburt , Eric Gaidos , Yanqin Wu

The Robo-AO \textit{Kepler} Planetary Candidate Survey is observing every \textit{Kepler} planet candidate host star with laser adaptive optics imaging to search for blended nearby stars, which may be physically associated companions and/or…

Earth and Planetary Astrophysics · Physics 2017-01-18 Carl Ziegler , Nicholas M. Law , Tim Morton , Christoph Baranec , Reed Riddle , Dani Atkinson , Anna Baker , Sarah Roberts , David R. Ciardi

KOI-152 is among the first known systems of multiple transiting planetary candidates (Steffen et al. 2010) ranging in size from 3.5 to 7 times the size of the Earth, in a compact configuration with orbital periods near a 1:2:4:6 chain of…

Earth and Planetary Astrophysics · Physics 2015-06-17 Daniel Jontof-Hutter , Jack J. Lissauer , Jason F. Rowe , Daniel C. Fabrycky

The characterization of four new transiting extrasolar planets is presented here. KOI-188b and KOI-195b are bloated hot Saturns, with orbital periods of 3.8 and 3.2 days, and masses of 0.25 and 0.34 M_Jup. They are located in the low-mass…

The 4-year light curves of 156,717 stars observed with NASA's Kepler mission are analyzed using the AutoRegressive Planet Search (ARPS) methodology described by Caceres et al. (2019). The three stages of processing are: maximum likelihood…

We conduct a systematic search for quasars with periodic variations from the archival photometric data of the Zwicky Transient Facility by cross-matching with the quasar catalogs of the Sloan Digital Sky Survey and V{\'e}ron-Cetty \&…

Astrophysics of Galaxies · Physics 2023-12-25 Yong-Jie Chen , Shuo Zhai , Jun-Rong Liu , Wei-Jian Guo , Yue-Chang Peng , Yan-Rong Li , Yu-Yang SongSheng , Pu Du , Chen Hu , Jian-Min Wang

The rapid expansion of exoplanet survey missions such as Kepler, TESS, and the upcoming PLATO mission has generated massive light-curve datasets that challenge traditional vetting pipelines. We introduce a hybrid deep-learning framework…

Earth and Planetary Astrophysics · Physics 2025-09-08 Bibin Thomas , Vittal Bhat M , Salman Arafath Mohammed , Abdul Wase Mohammed , Adis Abebaw Dessalegn , Mohit Mittal

We revisit the discovery and implications of the first candidate systems to contain multiple transiting exoplanets. These systems were discovered using data from the Kepler space telescope. The initial paper, presenting five systems…

Earth and Planetary Astrophysics · Physics 2022-02-01 Jason H. Steffen , Jack J. Lissauer

The Robo-AO Kepler Planetary Candidate Survey is observing every Kepler planet candidate host star (KOI) with laser adaptive optics imaging to hunt for blended nearby stars which may be physically associated companions. With the…

Earth and Planetary Astrophysics · Physics 2016-11-23 Carl Ziegler , Nicholas M. Law , Christoph Baranec , Tim Morton , Reed Riddle , Dani Atkinson , Larissa Nofi

We report the detection of transit timing variations (TTVs) well in excess of one hour in the Kepler multi-planet candidate system KOI 806. This system exhibits transits consistent with three separate planets -- a Super-Earth, a Jupiter,…

We have performed photometric observations of nearly 7 million stars with 8 < V < 15 with the SuperWASP-North instrument from La Palma between 2004 May-September. Fields in the RA range 17-18hr, yielding over 185,000 stars with sufficient…

The Kepler mission found hundreds of planet candidates within the habitable zones (HZ) of their host star, including over 70 candidates with radii larger than 3 Earth radii ($R_\oplus$) within the optimistic habitable zone (OHZ) (Kane et…

Earth and Planetary Astrophysics · Physics 2018-06-21 Michelle L. Hill , Stephen R. Kane , Eduardo Seperuelo Duarte , Ravi K. Kopparapu , Dawn M. Gelino , Robert A. Wittenmyer

We present an analysis of the transit timing variations (TTVs) in the multi-transiting planetary system around Kepler-51 (KOI-620). This system consists of two confirmed transiting planets, Kepler-51b ($P_{\rm b} = 45.2\,\mathrm{days}$) and…

Earth and Planetary Astrophysics · Physics 2014-02-17 Kento Masuda

By design, model-based approaches for flagging transiting exoplanets in light curves, such as boxed least squares, excel at detecting planets with low S/N at the expense of finding signals that are not well described by the assumed model,…

Earth and Planetary Astrophysics · Physics 2019-03-28 Adam Wheeler , David Kipping

With their smaller radii and high cosmic abundance, transiting planets around cool stars hold a unique appeal. As part of our on-going project to measure the occurrence rate of extrasolar moons, we here present results from a survey…

Earth and Planetary Astrophysics · Physics 2015-06-18 David M. Kipping , David Nesvorny , Lars A. Buchhave , Joel Hartman , Gáspár Á. Bakos , Allan R. Schmitt
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