Zobrazeno 1 - 10
of 159
pro vyhledávání: '"Long, Richard J."'
We propose a new method for measuring the spatial density distribution of the stellar halo of the Milky Way. Our method is based on a pairwise statistic of the distribution of stars on the sky, the angular two-point correlation function (ATPCF). The
Externí odkaz:
http://arxiv.org/abs/2307.15385
Knowing the conserved quantities that a galaxy's stellar orbits conform to is important in helping us understand the stellar distribution and structures within the galaxy. Isolating integrals of motion and resonances are particularly important, non-i
Externí odkaz:
http://arxiv.org/abs/2302.13166
We combine the kinematics of 159 globular clusters (GCs) provided by the Gaia Early Data Release 3 (EDR3) with other observational data to classify the GCs, and to estimate the mass of the Milky Way (MW). We use the age-metallicity relation, integral
Externí odkaz:
http://arxiv.org/abs/2210.12336
Autor:
Yang, Fan, Zhang, Bo, Long, Richard J., Lu, You-Jun, Shan, Su-Su, Wei, Xing, Fu, Jian-Ning, Zhang, Xian-Fei, Zhao, Zhi-Chao, Bai, Yu, Yi, Tuan, Zheng, Ling-Lin, Zhou, Ze-Ming, Liu, Ji-Feng
Single-line spectroscopic binaries recently contribute to the stellar-mass black hole discovery, independently of the X-ray transient method. We report the identification of a single-line binary system LTD064402+245919, with an orbital period of 14.5
Externí odkaz:
http://arxiv.org/abs/2110.07944
The stellar mass-to-light ratio gradient in SDSS $r-$band $\nabla (M_*/L_r)$ of a galaxy depends on its mass assembly history, which is imprinted in its morphology and gradients of age, metallicity, and stellar initial mass function (IMF). Taking a M
Externí odkaz:
http://arxiv.org/abs/2108.05487
Autor:
Yang, Fan, Long, Richard J., Liu, Ji-Feng, Shan, Su-Su, Guo, Rui, Zhang, Bo, Yi, Tuan, Zheng, Ling-Lin, Zhao, Zhi-Chao
We present a novel, iterative method using an empirical Bayesian approach for modeling the limb darkened WASP-121b transit from the TESS light curve. Our method is motivated by the need to improve $R_{p}/R_{\ast}$ estimates for exoplanet atmosphere m
Externí odkaz:
http://arxiv.org/abs/2104.07864
We present a method to compute the magnification of a finite source star lensed by a triple lens system based on the image boundary (contour integration) method. We describe a new procedure to obtain continuous image boundaries from solutions of the
Externí odkaz:
http://arxiv.org/abs/2102.09163