Zobrazeno 1 - 10
of 1 578
pro vyhledávání: '"LONG, RICHARD A."'
Autor:
Long, Richard J.
A simple orbit classification constraint extension to stellar dynamical modeling using Schwarzschild's method is demonstrated. The classification scheme used is the existing `orbit circularity' scheme (lambda_z) where orbits are split into four group
Externí odkaz:
http://arxiv.org/abs/2412.09167
Autor:
Yang, Fan, Long, Richard J., Kerins, Eamonn, Awiphan, Supachai, Shan, Su-Su, Zhang, Bo, Joshi, Yogesh C., A-thano, Napaporn, Jiang, Ing-Guey, Priyadarshi, Akshay, Liu, Ji-Feng
Hot Jupiters should initially form at considerable distances from host stars and subsequently migrate towards inner regions, supported directly by transit timing variation (TTV). We report the TTV of K2-237b, using reproduced timings fitted from \tex
Externí odkaz:
http://arxiv.org/abs/2409.07865
Conventional galaxy mass estimation methods suffer from model assumptions and degeneracies. Machine learning, which reduces the reliance on such assumptions, can be used to determine how well present-day observations can yield predictions for the dis
Externí odkaz:
http://arxiv.org/abs/2311.10351
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:
Martinez, Leonardo, Seddon, James, Liu, Qiao, Acuna Villaorduna, Carlos, Bonnet, Maryline, Carvalho, Anna Cristina C., Chan, Pei-Chun, Hill, Philip C, Lopez-Varela, Elisa, Donkor, Simon, Graham, Stephen M., Villalba, Julian A., Grandjean, Louis, Zellweger, Jean-Pierre, Wang, Jann-Yuan, Verhagen, Lilly M, van Schalkwykn, Cari, van der Loeff, Maarten F Schim, Sloot, Rosa, Trieu, Lisa, Ahuja, Shama Desai, Yoshiyama, Takashi, Mazahir, Rufaida, Martinsonn, Neil A, Jones-López, Edward C., Altet, Neus, Kato, Seiya, Fang, Chi-Tai, Geis, Steffen, Hauri, Anja, Long, Richard, Dobler, Claudia C, Cayla, Joan A, Chakhaia, Tsira, Chen, Cheng, García-Basteiro, Alberto L., Triasih, Rina, Huang, Li-Min, Sharma, Surendra, Hannoun, Djohar, Malone, LaShaunda L., Ling, Du-Lin, Kritski, Afrânio, Stein, Catherine M., Malik, Amyn A, Augusto, Orvalho, Vashishtha, Richa, Boulahbal, Fadila, Boom, W. Henry, Shen, Ye, Hesseling, Anneke C, Horsburgh, C. Robert, Lange, Christoph, Mandalakas, Anna M., Seddon, James A, Horsburgh, C Robert *, Mandalakas, Anna M *
Publikováno v:
In The Lancet Respiratory Medicine August 2024 12(8):633-641
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:
Long, Richard A.
Publikováno v:
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Thesis (Ph. D.)--University of California, San Diego, 2001.
Vita. Includes bibliographical references.
Vita. Includes bibliographical references.
Externí odkaz:
http://wwwlib.umi.com/cr/ucsd/fullcit?p3035420