Luqian Wang

CHIRON radial velocities of 5 Be+sdO binaries

Luqian Wang, Douglas R. Gies, Geraldine J. Peters, Zhanwen Han

us, cn (code pays fourni par la source)

Spatial distribution and business environment of specialized and sophisticated Little Giant enterprises in Zhejiang Province

Luqian Wang, Wasi Ul Hassan Shah

"Little Giant" Enterprises (LGEs) are leading exemplars of China's specialized and sophisticated small and medium-sized enterprises, playing a critical role in national industrial upgrading and innovation. Understanding the specific business environment configurations that foster these high-potential firms is a significant and practical …

cn (code pays fourni par la source)

The multiplicity properties of early-type stars from LAMOST DR8

Yanjun Guo, Chenglong Liu, Luqian Wang, J. Wang et autres

XGboost for Predicting Chemical Abundances of Open Clusters in LAMOST DR11 LRS

Chengyuan Wu, Luqian Wang, Shuai Zha, Sufen Guo et autres

Abstract The 11th data release of the LAMOST survey provides fundamental stellar parameters but lacks detailed abundance measurements for α-elements, which are crucial for understanding stellar populations and Galactic chemical evolution. In this study, we derive the abundances of oxygen (O), magnesium …

cn (code pays fourni par la source)

When LAMOST meets Gaia DR3 Exploring the metallicity of open clusters

R. Zhang, Guojian Wang, Yuxi, Yuxi Lu et autres

Context. Open clusters (OCs) are valuable probes of stellar population characteristics. Their age and metallicity provide insights into the chemical enrichment history of the Milky Way. By studying the metallicity of OCs, we can explore the spatial distribution of composition across the …

When LAMOST meets Gaia DR3

R. Zhang, Guojian Wang, Yuxi Lu, Sufen Guo et autres

Context. Open clusters (OCs) are excellent probes as their age and abundance can be tightly constrained, allowing us to explore the distribution of metallicity and composition across the disk of the Milky Way. By conducting a comprehensive analysis of the metallicity of …

cn, Afrique du Sud, us, it, de (code pays fourni par la source)

Ninety percent circular polarization detected in a repeating fast radio burst

Jinchen Jiang, Jin-Long Xu, Jiarui Niu, K. J. Lee et autres

Fast radio bursts (FRBs) are extra-galactic sources with unknown physical mechanisms. They emit millisecond-duration radio pulses with isotropic equivalent energy of $10^{36}\sim10^{41}$ ergs. This corresponds to a brightness temperature of FRB emission typically reaching the level of $10^{36}$ K, but can be …

Estimating the Atmospheric Parameters of Early-type Stars from the Chinese Space Station Telescope (CSST) Slitless Spectra Survey

J.R. McVean RAO, HaiLiang Chen, Jian-Ping Xiong, Luqian Wang et autres

Abstract The measurement of atmospheric parameters is fundamental for scientific research using stellar spectra. The Chinese Space Station Telescope (CSST), scheduled to be launched in 2024, will provide researchers with hundreds of millions of slitless spectra for stars during a 10 yr …

cn (code pays fourni par la source)

A Catalog of Early-type Runaway Stars from LAMOST DR8

Yanjun Guo, Luqian Wang, Chao Liu, You Wu et autres

Abstract Runaway stars are OB-type stars ejected from their birthplace with large peculiar velocities. The leading hypothesis addressed in their formation includes the supernova ejection mechanism and the dynamic ejection scenario. Identification of runaway populations is the first step to investigating their …

cn, de (code pays fourni par la source)

The Catalog of early-type Runaway stars from LAMOST-DR8

Yanjun Guo, Luqian Wang, Chao Liu, You Wu et autres

Runaway stars are OB-type stars ejected from their birthplace with large peculiar velocities. The leading hypothesis addressed in their formation includes the supernova ejection mechanism and the dynamic ejection scenario. Identification of runaway populations is the first step to investigating their formation …

TYC 3340-2437-1: A Quadruple System with A Massive Star

Jiao Li, Chao Liu, Changqing Luo, Bo Zhang et autres

Hierarchical massive quadruple systems are ideal laboratories for examining the theories of star formation, dynamical evolution, and stellar evolution. The successive mergers of hierarchical quadruple systems might explain the mass gap between neutron stars and black holes. Looking for light curves of …

TYC 3340-2437-1: A Quadruple System with a Massive Star

Jiao Li, Chao Liu, Changqing Luo, Bo Zhang et autres

Abstract Hierarchical massive quadruple systems are ideal laboratories for examining the theories of star formation, dynamical evolution, and stellar evolution. The successive mergers of hierarchical quadruple systems might explain the mass gap between neutron stars and black holes. Looking for light curves …

cn (code pays fourni par la source)