Zobrazeno 1 - 10
of 65
pro vyhledávání: '"pulsating variable stars"'
Autor:
Bogumił Pilecki
Publikováno v:
The Astrophysical Journal Letters, Vol 970, Iss 1, p L14 (2024)
Almost half of all classical Cepheids do not pulsate in fundamental mode, and nowadays, the fundamentalization of their higher-mode periods is frequently applied to increase the sample size in astrophysical investigations and allow for comparison wit
Externí odkaz:
https://doaj.org/article/8409103c13214fbeaa37414da40ddee1
Publikováno v:
The Astrophysical Journal Letters, Vol 963, Iss 2, p L43 (2024)
The tip of the red giant branch (TRGB) is an important standard candle for determining luminosity distances. Although several 10 ^5 small-amplitude red giant stars (SARGs) have been discovered, variability was previously considered irrelevant for the
Externí odkaz:
https://doaj.org/article/dff3c56e58a24af1841aacb64e23b1f5
Autor:
Ping Li, Wen-Ping Liao, Sheng-Bang Qian, Lin-Jia Li, Qi-Bin Sun, Xiang-Dong Shi, Azizbek Matekov, Qi-Huan Zeng, Zhao-Long Deng, Xiao-Hui Fang
Publikováno v:
The Astrophysical Journal, Vol 977, Iss 1, p 3 (2024)
We report a cyclic variation of the O − C diagram with a semiamplitude of 0.0033 days and a period of 1.05 yr for the pulsating eclipsing binary HZ Dra. The cyclic variation can be explained by the light travel-time effect via the presence of a clo
Externí odkaz:
https://doaj.org/article/52d55248e78f4ff597a35927235af7ce
Publikováno v:
The Astrophysical Journal, Vol 977, Iss 1, p 1 (2024)
Pulsating stars are universally recognized as precise distance indicators and tracers of stellar populations. Their variability, combined with well-defined relationships between pulsation properties and intrinsic evolutionary parameters such as lumin
Externí odkaz:
https://doaj.org/article/6248042da0864dd48e7b2a9803254d9b
Autor:
Mengqi Jin, Jianning Fu, Xiaobin Zhang, Weikai Zong, Jiaxin Wang, Xiaoyu Ma, Keyu Xing, Haotian Wang
Publikováno v:
The Astronomical Journal, Vol 168, Iss 6, p 280 (2024)
KIC 6362386 is an eclipsing binary system that exhibits both γ Doradus ( γ Dor)–type pulsations and starspots. In this study, we investigated this binary system using the Kepler photometry and the spectroscopic data from the Large Sky Area Multi-
Externí odkaz:
https://doaj.org/article/fc9f4b441e2b4df3a556676c53cc293a
Autor:
Matthew Paz
Publikováno v:
The Astronomical Journal, Vol 168, Iss 6, p 241 (2024)
This paper presents VARnet, a capable signal-processing model for rapid astronomical time series analysis. VARnet leverages wavelet decomposition, a novel method of Fourier feature extraction via the finite-embedding Fourier transform, and deep learn
Externí odkaz:
https://doaj.org/article/33953899172a433d9df1d5fced5a261e
Autor:
Min-Yu Li, Sheng-Bang Qian, Ai-Ying Zhou, Li-Ying Zhu, Wen-Ping Liao, Er-Gang Zhao, Xiang-Dong Shi, Fu-Xing Li, Qi-Bin Sun
Publikováno v:
The Astrophysical Journal, Vol 974, Iss 2, p 278 (2024)
Heartbeat stars (HBSs) with tidally excited oscillations (TEOs) are ideal astrophysical laboratories for studying the internal properties of the systems. In this paper, five new HBSs exhibiting TEOs are discovered using TESS photometric data. The orb
Externí odkaz:
https://doaj.org/article/de5c8261c3f34223b93d2cd43a2c93ba
Autor:
Kenneth Carrell, Ronald Wilhelm, Andrew Tom, Horace Smith, Adam Popowicz, Gary Hug, Stephen M. Brincat, Fabio Salvaggio, Keith Nakonechny, Darrell Lee, Teófilo Arranz Heras, Tony Vale, Davide Mortari, André Steenkamp, Ralph Rogge, Jacek Checinski
Publikováno v:
The Astrophysical Journal, Vol 973, Iss 2, p 157 (2024)
New results on the behavior of the double-mode RR Lyrae V338 Boo are presented. The Transiting Exoplanet Survey Satellite (TESS) observed this star again in 2022, and an observing campaign of the American Association of Variable Star Observers (AAVSO
Externí odkaz:
https://doaj.org/article/de183cbcaa324d3cba7a231821df52c5
Publikováno v:
The Astrophysical Journal, Vol 972, Iss 2, p 137 (2024)
δ Scuti variables are found at the intersection of the classical instability strip and the main sequence on the Hertzsprung–Russell diagram. With space-based photometry providing millions of light curves of A-F type stars, we can now probe the occ
Externí odkaz:
https://doaj.org/article/acdc743137464800a006153c0453a0d2
Publikováno v:
The Astronomical Journal, Vol 168, Iss 2, p 94 (2024)
As part of our variable star follow-up program, we have examined a number of stars from the Asteroid Terrestrial-impact Last Alert System (ATLAS) survey. Using a combination of our own data, ATLAS data, and other archival data, we confirmed the publi
Externí odkaz:
https://doaj.org/article/0aa4221489d44ba5a4a2e72b3c9bb70a