Results 1 to 10 of about 240,676 (167)

Monte Carlo simulations of a diffusive shock with multiple scattering angular distributions

, 2011
We independently develop a simulation code following the previous dynamical Monte Carlo simulation of the diffusive shock acceleration under the isotropic scattering law during the scattering process, and the same results are obtained.
Wang, Xin, Yan, Yihua
core   +1 more source

The spectroscopic binary system Gl 375. I. Orbital parameters and chromospheric activity

, 2007
We study the spectroscopic binary system Gl 375. We employ medium resolution echelle spectra obtained at the 2.15 m telescope at the Argentinian observatory CASLEO and photometric observations obtained from the ASAS database.
Baliunas, Bessel, Bidelman, Buccino, C. Cincunegui, Christian, Cincunegui, Cincunegui, Cincunegui, Corben, Doyle, Doyle, Díaz, González, Gray, Gray, Gray, Horne, J. F. González, Johnson, Kron, McCarthy, Montes, P. J. D. Mauas, Perryman, Pettersen, Pojmanski, R. F. Díaz, Reid, Scargle, Schrijver, Udry, Vahia, Zahn, Zaqarashvili   +34 more
core   +1 more source

In-field Phasing at the Upgraded GMRT

The Astrophysical Journal
In time-domain radio astronomy with arrays, voltages from individual antennas are added together with proper delay and fringe correction to form the beam in real time.
Sanjay Kudale, Jayanta Roy, Jayaram N. Chengalur, Shyam Sharma, Sangita Kumari   +4 more
doaj   +1 more source

A Decade of Transit-timing Measurements Confirm Resonance in the K2-19 System

The Astronomical Journal
K2-19 is a star, slightly smaller than the Sun, that hosts three transiting planets. Two of these, K2-19 b and c, are between the size of Neptune and Saturn and have orbital periods near a 3:2 commensurability, and exhibit strong transit-timing ...
Paige M. Entrican, Erik A. Petigura, Antoine C. Petit, Gregory J. Gilbert, Kento Masuda   +4 more
doaj   +1 more source

Orbital Decay of the Ultra-hot Jupiter TOI-2109b: Tidal Constraints and Transit-timing Analysis

The Astrophysical Journal
TOI-2109b is the ultra-hot Jupiter with the shortest orbital period (∼16 hr) yet discovered. At this close distance, strong tidal interactions can produce a significant exchange of angular momentum with the star.
Jaime A. Alvarado-Montes, Mario Sucerquia, Jorge I. Zuluaga, Christian Schwab   +3 more
doaj   +1 more source

Impact of the initial disk mass function on the disk fraction

, 2015
The disk fraction, the percentage of stars with disks in a young cluster, is widely used to investigate the lifetime of the protoplanetary disk, which can impose an important constraint on the planet formation mechanism.
Ohsawa, Ryou, Onaka, Takashi, Yasui, Chikako   +2 more
core   +1 more source

Mapping the Orbital Landscape of Perturbing Planet Solutions for Single-planet Systems with TTVs

The Astrophysical Journal
There are now thousands of single-planet systems observed to exhibit transit timing variations (TTVs), yet we largely lack any interpretation of the implied masses responsible for these perturbations.
Daniel A. Yahalomi, David Kipping
doaj   +1 more source

Structure and evolution of rotationally and tidally distorted stars

, 2009
This paper aims to study the configuration of two components caused by rotational and tidal distortions in the model of a binary system. The potentials of the two distorted components can be approximated to 2nd-degree harmonics.
Burša, Burša, Cantiello, Chan, Chandrasekhar, Charbonnel, Charbonnel, Charboyer, De Loore, Decressin, Denissenkov, Eggleton, Eggleton, Eggleton, Endal, Endal, Frankowski, H. F. Song, Han, Heger, Heger, Hilditch, Hofmeister, Huang, Huang, Huang, Huang, Jackson, Kippenhahn, Kippenhahn, Kopal, Kopal, Kähler, Landin, Langer, Langer, Langer, Langer, Li, Li, Li, Maeder, Maeder, Maeder, Maeder, Maeder, Mardirossian, Meynet, Meynet, Petrovic, Petrovic, Pinsonneault, Renvoizé, Rieutord, Soker, Talon, Tout, Van Hamme, Vanbeveren, von Zeipel, Y. Lu, Yoon, Z. Zhong, Zahn, Zahn, Zahn, Zahn, Zahn, Zickgraf   +68 more
core   +1 more source

An Empirical Study On Imaging Sensitivity Of SKA1-LOW Based on Point Source Sensitivity

The Astronomical Journal
The Square Kilometre Array (SKA) radio telescope will achieve unparalleled sensitivity and angular resolution, substantially progressing our research into the formation and development of the early universe.
Zhaotong Xie, Feng Wang, Ying Mei, Hui Deng, Yunjin Zhu   +4 more
doaj   +1 more source

The Orbit and Dynamical Mass of Polaris: Observations with the CHARA Array

The Astrophysical Journal
The 30 yr orbit of the Cepheid Polaris has been followed with observations by the Center for High Angular Resolution Astronomy (CHARA) Array from 2016 through 2021.
Nancy Remage Evans, Gail H. Schaefer, Alexandre Gallenne, Guillermo Torres, Elliott P. Horch, Richard I. Anderson, John D. Monnier, Rachael M. Roettenbacher, Fabien Baron, Narsireddy Anugu, James W. Davidson Jr., Pierre Kervella, Garance Bras, Charles Proffitt, Antoine Mérand, Margarita Karovska, Jeremy Jones, Cyprien Lanthermann, Stefan Kraus, Isabelle Codron, Howard E. Bond, Giordano Viviani   +21 more
doaj   +1 more source