Zobrazeno 1 - 10
of 120
pro vyhledávání: '"Chen, Bingqiu"'
The extinction curve of interstellar dust in the dense molecular cloud cores is crucial for understanding dust properties, particularly size distribution and composition. We investigate the infrared extinction law in four nearby isolated molecular cl
Externí odkaz:
http://arxiv.org/abs/2411.00619
Asymptotic giant branch stars (AGBs) and red supergiant stars (RSGs) exhibit significant mass loss phenomena and are considered important sources of interstellar dust. In this work, we employed an uniform method of spectral energy distribution fittin
Externí odkaz:
http://arxiv.org/abs/2409.09751
Autor:
Lian, Jianhui, Zasowski, Gail, Chen, Bingqiu, Imig, Julie, Wang, Tao, Boardman, Nicholas, Liu, Xiaowei
The size of a galaxy is one of the fundamental parameters that reflects its growth and assembly history. Traditionally, the size of the Milky Way has been characterized by the scale length of the disk, based on the assumption of an exponential densit
Externí odkaz:
http://arxiv.org/abs/2406.05604
Investigating the extinction law in regions of high dust extinction, such as the Pillars of Creation within the M16 region, is crucial for understanding the densest parts of the interstellar medium (ISM). In this study, we utilize observations from t
Externí odkaz:
http://arxiv.org/abs/2406.03410
One of the major challenges we face is how to quickly and accurately create the three-dimensional (3D) density distributions of interstellar dust in the Milky Way using extinction and distance measurements of large samples of stars. In this study, we
Externí odkaz:
http://arxiv.org/abs/2402.11270
Autor:
Yang, Ming, Zhang, Bo, Jiang, Biwei, Gao, Jian, Ren, Yi, Wang, Shu, Lam, Man I, Tian, Hao, Luo, Changqing, Chen, Bingqiu, Wen, Jing
The precise definition of the lower mass limit of red supergiant stars (RSGs) is an open question in astrophysics and does not attract too much attention. Here we assemble a spectroscopic evolved cool star sample with 6,602 targets, including RSGs, a
Externí odkaz:
http://arxiv.org/abs/2401.15832
Mass loss is a crucial process that affects the observational properties, evolution path and fate of highly evolved stars. However, the mechanism of mass loss is still unclear, and the mass-loss rate (MLR) of red supergiant stars (RSGs) requires furt
Externí odkaz:
http://arxiv.org/abs/2401.03778
To gain a better understanding of the Andromeda galaxy M31 and its role in the Local Group, measuring its mass precisely is essential. In this work, we have constructed the rotation curve of M31 out to $\sim$125 kpc using 13,679 M31 objects obtained
Externí odkaz:
http://arxiv.org/abs/2401.01517
The total-to-selective extinction ratio, Rv, is a key parameter for tracing the properties of interstellar dust, as it directly determines the variation of the extinction curve with wavelength. By utilizing accurate color excess measurements from the
Externí odkaz:
http://arxiv.org/abs/2309.04113
Autor:
Zhang, Shan, Liu, Gaochao, Huang, Yang, Lv, Zongfei, Bird, Sarah Ann, Chen, Bingqiu, Zhang, Huawei, Beers, Timothy C., Li, Xinyi, Tian, Haijun, Zhang, Peng
We use 3653 (2661 RRab, 992 RRc) RR Lyrae stars (RRLs) with 7D (3D position, 3D velocity, and metallicity) information selected from SDSS, LAMOST, and Gaia EDR3, and divide the sample into two Oosterhoff groups (Oo I and Oo II) according to their amp
Externí odkaz:
http://arxiv.org/abs/2309.02828