Results 61 to 70 of about 968 (198)

Detecting Planetary Oblateness in the Era of JWST: A Case Study of Kepler-167e

The Astronomical Journal
Planets may be rotationally flattened, and their oblateness thus provides useful information on their formation and evolution. Here, we develop a new algorithm that can compute the transit light curve due to an oblate planet very efficiently and use it ...
Quanyi Liu, Wei Zhu, Yifan Zhou, Zhecheng Hu, Zitao Lin, Fei Dai, Kento Masuda, Sharon X. Wang   +7 more
doaj   +1 more source

Precision photometry with difference imaging in the WTS

EPJ Web of Conferences, 2013
The Wide Field Camera Transit Survey is a pioneer program aimed to search for extra-solar planets in the near-infrared. The standard data reduction pipeline of the program uses aperture photometry to construct the light curves. We alternatively apply the
Pinfield D.J., Kovács G., Hodgkin S.T., Birkby J.L., Saglia R.P., Zendejas J., Koppenhoefer J., Sipőcz B.   +7 more
doaj   +1 more source

Precise Photometry and Spectroscopy of Transits

, 2007
A planetary transit produces both a photometric signal and a spectroscopic signal. Precise observations of the transit light curve reveal the planetary radius and allow a search for timing anomalies caused by satellites or additional planets. Precise measurements of the stellar Doppler shift throughout a transit (the Rossiter-McLaughlin effect) place a
openaire   +2 more sources

Exoplanet Detection Using AI in Transit Photometry

, 2023
This study delves into the techniques and results of detecting exoplanets using transit photometry, leveraging data obtained from the Kepler Space Telescope. The research aims to shed light on both manual and automated approaches to exoplanet detection, with a specific emphasis on employing the folding technique to identify recurring patterns in light ...
openaire   +2 more sources

Looking at Soil as It Is: Evolution of Microscopic Soil Characterization From Kubiëna to Artificial Intelligence

Journal of Plant Nutrition and Soil Science, EarlyView.
We provide a historic overview of microscopic soil structure characterization from its founding father, Walter Kubiëna, to several technical revolutions like automation, digitalization, and artificial intelligence. In addition to technical advancements, we explore how concepts and research questions have evolved in time.
Steffen Schlüter, Maik Geers‐Lucas, Peter Kühn, Hans‐Jörg Vogel   +3 more
wiley   +1 more source

Planet Hunters NGTS: New Planet Candidates from a Citizen Science Search of the Next Generation Transit Survey Public Data

The Astronomical Journal
We present the results from the first two years of the Planet Hunters Next Generation Transit Survey (NGTS) citizen science project, which searches for transiting planet candidates in data from the NGTS by enlisting the help of members of the general ...
Sean M. O’Brien, Megan E. Schwamb, Samuel Gill, Christopher A. Watson, Matthew R. Burleigh, Alicia Kendall, Sarah L. Casewell, David R. Anderson, José I. Vines, James S. Jenkins, Douglas R. Alves, Laura Trouille, Solène Ulmer-Moll, Edward M. Bryant, Ioannis Apergis, Matthew Battley, Daniel Bayliss, Nora L. Eisner, Edward Gillen, Michael R. Goad, Maximilian N. Günther, Beth A. Henderson, Jeong-Eun Heo, David G. Jackson, Chris Lintott, James McCormac, Maximiliano Moyano, Louise D. Nielsen, Ares Osborn, Suman Saha, Ramotholo R. Sefako, Andrew W. Stephens, Rosanna H. Tilbrook, Stéphane Udry, Richard G. West, Peter J. Wheatley, Tafadzwa Zivave, See Min Lim, Arttu Sainio   +38 more
doaj   +1 more source

Mauna Kea High Speed Photometry of Transits of the Extrasolar Planet HD 209458B

Open Astronomy, 2003
Using high-speed photometry techniques, three transits of the extrasolar planet across the disk of the star HD 209458 have been observed. The combination of a WET-style 3-channel photometer and an excellent site yielded millimagnitude photometric ...
Sullivan Denis J., Sullivan Tiri
doaj   +1 more source

Functional Effects of the Pioneer Fern Dicranopteris on Soil Fertility and Its Spatial Patterns in Degraded Hilly Landscapes

Land Degradation &Development, EarlyView.
ABSTRACT Vegetation recovery is vital for reversing soil degradation in subtropical red soil regions. This study evaluates the role of the pioneer fern Dicranopteris in enhancing soil fertility and its spatial variability across degraded hills in South China.
Xiqin Yan, Meijie Liu, Long Yang, Lei Chen, Shijie Zhang, Xiaolin Xia, Jingyu Zhang   +6 more
wiley   +1 more source

Long‐Term Combined Application of Biochar and Chemical Fertilizers Enhances Potassium Supply Capacity in Continuous Cropping Soils

Land Degradation &Development, EarlyView.
ABSTRACT Sustaining soil potassium (K) supply in intensive continuous cropping systems is increasingly challenging because long‐term crop removal often exceeds the natural replenishment capacity of soil K‐bearing minerals, leading to progressive depletion of plant‐available K pools.
Hangming Guo, Shunguo Liu, Zefang Zhu, Kangbo Xu, Jing Wang, Wenda Wang, Na Li, Jinfeng Yang   +7 more
wiley   +1 more source

Singular Spectrum Analysis of Exoplanetary Transits

The Astronomical Journal
Transit photometry is currently the most efficient and sensitive method for detecting extrasolar planets (exoplanets) and a large majority of confirmed exoplanets have been detected with this method.
Hossein Fatheddin, Sedighe Sajadian
doaj   +1 more source