Zobrazeno 1 - 10
of 13
pro vyhledávání: '"Henggeng, Han"'
Autor:
Song, Wang, Xinlin, Zhao, Fabo, Feng, Hongwei, Ge, Yong, Shao, Yingzhen, Cui, Shijie, Gao, Lifu, Zhang, Pei, Wang, Xue, Li, Zhongrui, Bai, Hailong, Yuan, Yang, Huang, Haibo, Yuan, Zhixiang, Zhang, Tuan, Yi, Maosheng, Xiang, Zhenwei, Li, Tanda, Li, Junbo, Zhang, Meng, Zhang, Henggeng, Han, Dongwei, Fan, Xiangdong, Li, Xuefei, Chen, Zhengwei, Liu, Xiangcun, Meng, Qingzhong, Liu, Haotong, Zhang, Wei-Min, Gu, Jifeng, Liu
Mass distribution of black holes identified through X-ray emission suggests a paucity of black holes in the mass range of 3 to 5 solar masses. Modified theories have been devised to explain this mass gap, and it is suggested that natal kicks during s
Externí odkaz:
http://arxiv.org/abs/2409.06352
Publikováno v:
The Astrophysical Journal, Vol 976, Iss 2, p 243 (2024)
Using the LAMOST DR7 low-resolution spectra, we carried out a systematic study of stellar chromospheric activity in both single and binary stars. We constructed a binary sample and a single-star sample, mainly using the binary belt and the main seque
Externí odkaz:
https://doaj.org/article/7225f7415ec642d7b9c37a00d4731abe
Publikováno v:
The Astrophysical Journal, Vol 976, Iss 1, p 43 (2024)
Stellar ultraviolet (UV) emission serves as a crucial indicator for estimating magnetic activity and evaluating the habitability of exoplanets orbiting stars. In this paper, we present a straightforward method to derive stellar photospheric UV emissi
Externí odkaz:
https://doaj.org/article/c001e38340ca4379a3205897fce75945
Publikováno v:
The Astrophysical Journal, Vol 975, Iss 1, p 133 (2024)
This study investigates the active regions of the M3.0V star G 80–21 using the observed data from the CARMENES project with synthetic spectra generated by the RH1.5D radiative transfer code. The CARMENES project aims to search for exoplanets around
Externí odkaz:
https://doaj.org/article/3a2aebf2429e4fccb3112069acf0df44
Publikováno v:
The Astrophysical Journal, Vol 972, Iss 2, p 151 (2024)
The Doppler beaming effect, induced by the reflex motion of stars, introduces flux modulations and serves as an efficient method to photometrically determine mass functions for a large number of close binary systems, particularly those involving comp
Externí odkaz:
https://doaj.org/article/6141570c1cb04574aa909a0b0d8f154a
Publikováno v:
The Astrophysical Journal Supplement Series, Vol 273, Iss 1, p 8 (2024)
Using the homogeneous X-ray catalog from ROSAT observations, we conducted a comprehensive investigation into stellar X-ray activity–rotation relations for both single and binary stars. Generally, the relation for single stars consists of two distin
Externí odkaz:
https://doaj.org/article/fcfc0a5dfdbd411599e9b5d76ca20de0
Publikováno v:
The Astrophysical Journal, Vol 966, Iss 1, p 69 (2024)
M-type stars are crucial for stellar activity studies because they cover two types of magnetic dynamos and are particularly intriguing for habitability studies due to their abundance and long lifespans during the main-sequence stage. In this paper, w
Externí odkaz:
https://doaj.org/article/6f625ed930984712aab6b04abe0eb35c
Publikováno v:
The Astrophysical Journal Supplement Series, Vol 264, Iss 1, p 12 (2022)
By using the LAMOST time-domain survey data, we study stellar activities based on the H _α lines for about 2000 stars in four K2 plates. Two indices, ${R}_{{\rm{H}}\alpha }^{{\prime} }$ and ${R}_{{\rm{H}}\alpha }^{+}$ , are computed from LAMOST spec
Externí odkaz:
https://doaj.org/article/da47f273708d42349a46171e937cae9b
Publikováno v:
Research in Astronomy and Astrophysics. 21:142
Stellar activity cycles have been found on many stars through different methods. Although in debate, an empirical relation has been found where a period of stellar activity cycle P cyc is positively correlated with rotation period P rot along some se
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d2ed18d7b44305d631fca6e9cab18183
https://doi.org/10.1088/1674-4527/21/6/142
https://doi.org/10.1088/1674-4527/21/6/142
Publikováno v:
The Astrophysical Journal. 859:87
Flare research is becoming a burgeoning realm of interest in the study of stellar activity due to the launch of Kepler in 2009. Kepler provides data with two time resolutions, i.e., the long-cadence (LC) data with a time resolution of 30 minutes and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5e6ad99af93cad9df515bdb177f3be57
https://doi.org/10.3847/1538-4357/aabd31
https://doi.org/10.3847/1538-4357/aabd31