Zobrazeno 1 - 10
of 1 014
pro vyhledávání: '"early-type [Stars]"'
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
Autor:
Mónica Taormina, R.-P. Kudritzki, B. Pilecki, G. Pietrzyński, I. B. Thompson, J. Puls, M. Górski, B. Zgirski, D. Graczyk, W. Gieren, G. Hajdu
Publikováno v:
The Astrophysical Journal, Vol 967, Iss 1, p 64 (2024)
We present the results from a complex study of an eclipsing O-type binary (Aa+Ab) with the orbital period of P _A = 3.2254367 days that forms part of a higher-order multiple system in a configuration of (A+B)+C. We derived masses of the Aa+Ab binary
Externí odkaz:
https://doaj.org/article/6b078063f7db4ff6a3b34caa8b1aa391
Autor:
Zhenyan Huo, Zhicun Liu, Wenyuan Cui, Chao Liu, Jiaming Liu, Mingxu Sun, Shuai Feng, Linlin Li
Publikováno v:
The Astrophysical Journal Supplement Series, Vol 271, Iss 1, p 15 (2024)
The measurements of masses and luminosities of massive stars play an important role in understanding the formation and evolution of their host galaxies. In this work, we present the measurement of masses and luminosities of 2946 OB-type stars, includ
Externí odkaz:
https://doaj.org/article/e425faf5272b4b659fa3619b2d391bd0
Autor:
B. Thorsbro, R. Forsberg, G. Kordopatis, A. Mastrobuono-Battisti, R. P. Church, R. M. Rich, N. Ryde, M. Schultheis, S. Nishiyama
Publikováno v:
The Astrophysical Journal Letters, Vol 958, Iss 1, p L18 (2023)
We report metallicities for three ∼Gyr-old stars in the Milky Way nuclear star cluster (NSC) using high-resolution near-infrared spectroscopy. We derive effective temperatures from a calibration with Sc line strength, which yields results in good a
Externí odkaz:
https://doaj.org/article/ef2f7cdce0504c9ba7ead0406c0b2c91