Zobrazeno 1 - 10
of 1 095
pro vyhledávání: '"early-type stars"'
Autor:
Fu-Xing Li, Sheng-Bang Qian, Li-ying Zhu, Wen-Ping Liao, Er-gang Zhao, Min-Yu Li, Qi-Bin Sun, Lin-Feng Chang, Wen-Xu Lin
Publikováno v:
The Astrophysical Journal, Vol 976, Iss 2, p 158 (2024)
The massive semidetached binary with a long-term decreasing orbital period may involve a rapid mass-transfer phase in Case A, and thus, they are good astrophysical laboratories for investigating the evolution of massive binary stars. In this work, by
Externí odkaz:
https://doaj.org/article/54119f780f784c31bb4b74f37d0207fe
Publikováno v:
The Astrophysical Journal Supplement Series, Vol 275, Iss 2, p 24 (2024)
In this work, we update the catalog of OB stars based on the Large Sky Area Multi-Object Fiber Spectroscopic Telescope data release 7 and modify the OB stars’ selection criteria in spectral line indices’ space. The new catalog includes 37,778 spe
Externí odkaz:
https://doaj.org/article/9eb1f60d2aa2494d948440532df3cdb2
Publikováno v:
The Astrophysical Journal, Vol 975, Iss 1, p 153 (2024)
The spin–orbit alignment of binary stars traces their formation and accretion history. Previous studies of spin–orbit alignment have been limited to small samples, slowly rotating solar-type stars, and/or wide visual binaries that not surprisingl
Externí odkaz:
https://doaj.org/article/9ae3a32dc79a4d69a8df71a2b2783f26
Publikováno v:
The Astrophysical Journal, Vol 974, Iss 2, p 267 (2024)
Main-sequence radio pulse emitters (MRPs) are magnetic early-type stars that produce coherent radio emission observed in the form of periodic radio pulses. The emission mechanism behind this is the electron-cyclotron maser emission (ECME). Among all
Externí odkaz:
https://doaj.org/article/82c7b67f40314d629d8089dd79545683
Publikováno v:
The Astrophysical Journal Supplement Series, Vol 275, Iss 1, p 2 (2024)
In order to explore how the ubiquitous stochastic low-frequency (SLF) variability of O-type stars is related to various stellar characteristics, we compiled a sample of 150 O-type stars observed via ground-based spectroscopic surveys, alongside photo
Externí odkaz:
https://doaj.org/article/652dc1ebfcc340b0becb59c6d00d1346
Publikováno v:
The Astrophysical Journal, Vol 972, Iss 1, p 119 (2024)
The detection of O- and B-type stars with extremely low-mass companions is very important for understanding the formation and evolution of binary stars. However, finding them remains a challenge because the low-mass components in such systems contrib
Externí odkaz:
https://doaj.org/article/c42b5ca5eeba41f9a75d70abc022dac7
Publikováno v:
The Astrophysical Journal, Vol 971, Iss 2, p 166 (2024)
UV wind-line variability in OB stars appears to be universal. In order to quantify this variation and to estimate its effect on a mass-loss rate determined from a single observation, we use the International Ultraviolet Explorer archive to identify n
Externí odkaz:
https://doaj.org/article/5b14d7548b2242858d1f32ff206a0c8c
Publikováno v:
The Astrophysical Journal Supplement Series, Vol 273, Iss 1, p 5 (2024)
The Tarantula Nebula (30 Doradus, 30 Dor) is the most important star-forming complex in the Local Group, offering a microscope on starburst astrophysics. At its heart lies the exceptionally rich young stellar cluster R136, containing the most massive
Externí odkaz:
https://doaj.org/article/b8cc85d4b0a64d48a290b3bf80a29b49
Autor:
JiaRui Rao, HaiLiang Chen, JianPing Xiong, LuQian Wang, YanJun Guo, JiaJia Li, Chao Liu, ZhanWen Han, XueFei Chen
Publikováno v:
The Astronomical Journal, Vol 168, Iss 1, p 20 (2024)
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 spect
Externí odkaz:
https://doaj.org/article/8b20e47ed51c41a49351e19e1b8b41f0
Publikováno v:
The Astrophysical Journal Supplement Series, Vol 272, Iss 2, p 45 (2024)
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 p
Externí odkaz:
https://doaj.org/article/16d3e8148cc647099888d43f43ce821a