Results 51 to 60 of about 232,000 (280)

Exoplanet Ephemerides Change Observations (ExoEcho). II. Transit Timing Variation Analysis of Brown Dwarfs around Solar-type Stars

The Astrophysical Journal
Transit timing variation (TTV) is a useful tool for studying the orbital properties of transiting objects. However, few TTV studies have been done on transiting brown dwarfs (BDs) around solar-type stars.
Wenqin Wang, Xinyue Ma, Zhangliang Chen, Cong Yu, Shangfei Liu, Bo Ma   +5 more
doaj   +1 more source

Photometric Study of Contact Binary AW UMa [PDF]

Journal of Astronomy and Space Sciences, 1995
BVRI observations of AW UMa were made from March to April during 13 nights in 1994 using the 35cm schmidt-Cassegrain telescope of Department of Astronomy and Space Science, Chungbuk National University.
Jo Ryeong Yim, Jang Hae Jeong
doaj  

Chemical Homogeneity of Wide Binary Systems: An Approach from Near-Infrared Spectroscopy

The Astronomical Journal, 2023
Wide binaries, with separations between the two stars from a few au to more than several thousand au, are valuable objects for various research topics in Galactic astronomy.
Dongwook Lim, Andreas J. Koch-Hansen, Seungsoo Hong, Sang-Hyun Chun, Young-Wook Lee   +4 more
doaj   +1 more source

Intensity interferometry for observation of dark objects

, 2013
We analyze an intensity interferometry measurement carried out with two point-like detectors facing a distant source (e.g., a star) that may be partially occluded by an absorptive object (e.g., a planet).
Erkmen, Baris I., Strekalov, Dmitry V., Yu, Nan   +2 more
core   +1 more source

ErMn6Sn6: A Promising Kagome Antiferromagnetic Candidate for Room‐Temperature Nernst Effect‐Based Thermoelectrics

Advanced Functional Materials, EarlyView.
This work investigates the Nernst effect in the Kagome magnet ErMn6Sn6 which exhibits both topological and anomalous Nernst effects with the anomalous Nernst coefficient reaching 1.71 µV K⁻¹ at 300 K. This value surpasses that of most canted antiferromagnetic materials, making ErMn6Sn6 a promising candidate for advancing thermoelectric devices based on
Olajumoke Oluwatobiloba Emmanuel, Shuvankar Gupta, Xianglin Ke   +2 more
wiley   +1 more source

TrES-1 b: A Case Study in Detecting Secular Evolution of Exoplanet Orbits

The Astronomical Journal
We present a comprehensive analysis of transit, eclipse, and radial velocity data of the hot Jupiter TrES-1 b and confirm evidence of orbital variations on secular timescales.
Simone R. Hagey, Billy Edwards, Angelos Tsiaras, Aaron C. Boley, Anastasia Kokori, Norio Narita, Pedro V. Sada, Filip Walter, Robert T. Zellem, Napaporn A-thano, Kevin B. Alton, Miguel Ángel Álava Amat, Paul Benni, Emmanuel Besson, Patrick Brandebourg, Marc Bretton, Mauro Caló, Martin Valentine Crow, Jean-Christophe Dalouzy, Marc Deldem, Tõnis Eenmäe, Stephane Ferratfiat, Pere Guerra, Gary Vander Haagen, Ken Hose, Adrian Jones, Yves Jongen, Didier Laloum, Stefano Lora, Alessandro Marchini, Jacques Michelet, Matej Mihelčič, Johannes Mieglitz, Eric Miny, David Molina, Mario Morales Aimar, Raphael Nicollerat, Ivo Peretto, Manfred Raetz, François Regembal, Robert Roth, Lionel Rousselot, Mark Salisbury, Darryl Sergison, Anaël Wünsche, Jaroslav Trnka   +45 more
doaj   +1 more source

A Catalog of Young Stellar Objects from the LAMOST and ZTF Surveys

The Astrophysical Journal Supplement Series, 2023
As astronomical data sets become too large for traditional analysis approaches, more machine-learning algorithms are employed in astronomy. A wealth of light variation data have been accumulated, which provide rich samples for astronomers to study ...
Jingyi Zhang, Yanxia Zhang, Zihan Kang, Changhua Li, Yongheng Zhao   +4 more
doaj   +1 more source

Detection of an exoplanet around the evolved K giant HD 66141

, 2012
Aims. We have been carrying out a precise radial velocity (RV) survey for K giants to search for and study the origin of the lowamplitude and long-periodic RV variations. Methods. We present high-resolution RV measurements of the K2 giant HD 66141 from
Han, I., Kim, K. -M., Lee, B. -C., Mkrtichian, D. E., Park, M. -G.   +4 more
core   +1 more source

Unique Performance Considerations for Printable Organic Semiconductor and Perovskite Radiation Detectors: Toward Consensus on Best Practice Evaluation

Advanced Functional Materials, EarlyView.
A lack of standard approaches for testing and reporting the performance of metal halide perovskites and organic semiconductor radiation detectors has resulted in inconsistent interpretation of performance parameters, impeding progress in the field. This Perspective recommends key metrics and experimental details, which are suggested for reporting in ...
Jessie A. Posar, Matthew Large, Andrea Ciavatti, Laura Basiricò, Beatrice Fraboni, Paul J. Sellin, Attila J. Mozer, Marco Petasecca, Matthew J. Griffith   +8 more
wiley   +1 more source

Numerical self-consistent stellar models of thin disks

, 2005
We find a numerical self-consistent stellar model by finding the distribution function of a thin disk that satisfies simultaneously the Fokker-Planck and Poisson equations.
Aarseth, Ashurov, Cohn, de Zeeuw, de Zeeuw, Eddington, Freeman, Hunter, Jeans, Joshi, Kalnajs, King, Kuzmin, Letelier, M. Ujevic, Mestel, Michie, Michie, Miller, Miller, Miyamoto, Ng, Nishida, P. S. Letelier, Plummer, Rosenbluth, Schwarzschild, Statler, Stone, Takahashi, Takahashi, Teuben, Theuns, Toomre, Ujevic, van Albada, van de Ven, Vandervoort, Vogt, Watanabe, Wilkinson, Yepes   +41 more
core   +1 more source