Search Results - "Xiong, D R"

Lithium depletion in late-type dwarfs by Xiong, D. R., Deng, L.

“…Using a self-consistent dynamic theory of non-local convection, the atmospheric lithium-abundance depletion values of a series of stellar evolutionary models…”
Get full text

Non-adiabatic oscillations of red giants by Xiong, D. R., Deng, L.

“…Using our non-local time-dependent theory of convection, the linear non-adiabatic oscillations of 10 evolutionary model series with masses of 1–3 M⊙ are…”
Get full text

How to define the boundaries of a convective zone, and how extended is overshooting? by Deng, L., Xiong, D. R.

“…In non-local convection theory, convection extends without limit and therefore an apparent boundary cannot be defined clearly, as in local theory. From the…”
Get full text

Non-adiabatic oscillations of the low- and intermediate-degree modes of the Sun by Xiong, D. R., Deng, L.

“…Using a non-local time-dependent theory of convection, the linear stability is analysed for low- and intermediate-degree (l= 1–25) g4–p39 modes of the Sun. The…”
Get full text

An Anisotropic Nonlocal Convection Theory by Deng, L, Xiong, D. R, Chan, K. L

“…We present in this paper an anisotropic nonlocal theory of stellar convection. Following the idea of Rotta, we propose that the correlation of turbulent…”
Get full text

Turbulent convection and pulsation stability of stars – II. Theoretical instability strip for δ Scuti and γ Doradus stars by Xiong, D. R., Deng, L., Zhang, C., Wang, K.

“…By using a non-local and time-dependent convection theory, we have calculated radial and low-degree non-radial oscillations for stellar evolutionary models…”
Get full text

The connections between bulk Lorentz factor, black hole mass and accretion in Fermi FSRQs by Xiong, D. R., Zhang, X.

“…We have analyzed a large sample of FSRQs detected by Fermi LAT. Our main intents are to investigate the relations between bulk Lorentz factor and black hole…”
Get full text

Turbulent convection and pulsation stability of stars – III. Non-adiabatic oscillations of red giants by Xiong, D R, Deng, L, Zhang, C

Get full text

The structure of the solar convective overshooting zone by Xiong, D.R., Deng, L.

“…Using a non-local theory of convection, we calculated the structure of the solar convection zone, paying special attention to the detailed structure of the…”
Get full text

Lithium Abundances in α Persei Stars by Xiong, D.-R, Deng, L

“…We revisit the scatter in lithium abundances among stars in the alpha Persei cluster. Among the factors that we examine, inhomogeneous reddening, stellar…”
Get full text

The physical properties of Fermi TeV BL Lac objects’ jets by Ding, N, Zhang, X, Xiong, D R, Zhang, H J

“…We investigate the physical properties of Fermi TeV BL Lac objects' jets by modelling the quasi-simultaneous spectral energy distribution of 29 Fermi TeV BL…”
Get full text

Optical intraday variability analysis for the BL Lacertae object 1ES 1426+42.8 by Chang, X, Xiong, D R, Yi, T F, Liu, C X, Bhatta, G, Xu, J R, Gong, Y L

“…ABSTRACT The observation data of blazar 1ES 1426+42.8 were obtained using the 1.02 m optical telescope of Yunnan Observatories during 2021 to 2023. Intraday…”
Get full text

Turbulent convection and pulsation stability of stars – I. Basic equations for calculations of stellar structure and oscillations by Xiong, D R, Deng, L, Zhang, C

“…Starting from hydrodynamic equations, we have established a set of hydrodynamic equations for average flow and a set of dynamic equations of auto- and…”
Get full text

Multicolour optical variability monitoring of blazars with high time resolution by Chang, X, Yi, T F, Xiong, D R, Liu, C X, Yang, X, Li, H Z, Gong, Y L, Na, W W, Li, Y, Chen, Z H, Chen, J P, Mao, L S

“…ABSTRACT We carried out a high time-resolution, multicolour optical observing campaign for eight gamma-ray detected blazars during 2010–2020. We analyse flux…”
Get full text

Curvature of the spectral energy distribution, the inverse Compton component and the jet in Fermi 2LAC blazars by Xue, R, Luo, D, Du, L M, Wang, Z R, Xie, Z H, Yi, T F, Xiong, D R, Xu, Y B, Liu, W G, Yu, X L

“…We fitted the spectral energy distributions (SEDs) of members of a large sample of Fermi 2LAC blazars to synchrotron and inverse Compton (IC) models. Our main…”
Get full text

Broad line and multi-wave luminosity relations in Fermi FSRQs by Xiong, D. R., Zhang, H. J., Zhang, X., Zheng, Y. G., Yi, T. F., Liu, W. G., Cha, Y. J., Li, B. J.

“…We study broad line and multi-wave luminosity relations for 80 flat-spectrum radio quasars (FSRQs) detected by Fermi LAT. Our results are as follows: for…”
Get full text

Search for Intra-day Optical Variability in Mrk 501 by Feng, Hai-Cheng, Liu, H. T., Fan, X. L., Zhao, Yinghe, Bai, J. M., Wang, Fang, Xiong, D. R., Li, S. K.

“…We present our observations of the optical intra-day variability (IDV) in γ-ray BL Lac object Mrk 501. The observations were run with the 1.02 m and 2.4 m…”
Get full text

Multiwavelength study of the luminous GRB 210619B observed with Fermi and ASIM by Caballero-García, M D, Gupta, Rahul, Pandey, S B, Oates, S R, Marisaldi, M, Ramsli, A, Hu, Y-D, Castro-Tirado, A J, Sánchez-Ramírez, R, Connell, P H, Christiansen, F, Ror, A Kumar, Aryan, A, Bai, J-M, Castro-Tirado, M A, Fan, Y-F, Fernández-García, E, Kumar, A, Lindanger, A, Mezentsev, A, Navarro-González, J, Neubert, T, Østgaard, N, Pérez-García, I, Reglero, V, Sarria, D, Sun, T R, Xiong, D-R, Yang, J, Yang, Y-H, Zhang, B-B

“…ABSTRACT We report on detailed multiwavelength observations and analysis of the very bright and long GRB 210619B, detected by the Atmosphere-Space Interactions…”
Get full text

Turbulent convection and pulsational stability of variable stars — IV. The red edge of the δ Scuti instability strip by Xiong, D. R., Deng, L.

“…Using a non-local time-dependent statistical theory of convection, we made a linear pulsational instability analysis for stars in the mass range 1.4–3.0 M⊙…”
Get full text

The extent of the solar overshooting zone deduced from Li abundance by Xiong, D. R., Deng, L.

“…Abstract Using a non-local convection theory for chemically inhomogeneous stars, a set of models of the solar convective envelope is presented in this work…”
Get full text