Zobrazeno 1 - 10
of 439
pro vyhledávání: '"Astronomy data analysis"'
Publikováno v:
The Astrophysical Journal Letters, Vol 969, Iss 2, p L26 (2024)
We introduce “Class Symbolic Regression” (Class SR), the first framework for automatically finding a single analytical functional form that accurately fits multiple data sets—each realization being governed by its own (possibly) unique set of f
Externí odkaz:
https://doaj.org/article/d7ba15e7421e4d1b9a52f7f63b70ce7d
Autor:
Kai Xiao, Bowen Huang, Yang Huang, Haibo Yuan, Timothy C. Beers, Jifeng Liu, Maosheng Xiang, Xue Lu, Shuai Xu, Lin Yang, Chuanjie Zheng, Zhirui Li, Bowen Zhang, Ruifeng Shi
Publikováno v:
The Astrophysical Journal Letters, Vol 968, Iss 2, p L24 (2024)
We search for an optimal filter design for the estimation of stellar metallicity, based on synthetic photometry from Gaia XP spectra convolved with a series of filter-transmission curves defined by different central wavelengths and bandwidths. Unlike
Externí odkaz:
https://doaj.org/article/6c818680dada4f73825b0e899235fd32
Publikováno v:
The Astrophysical Journal Letters, Vol 968, Iss 2, p L22 (2024)
LHS 1140 b is a small planet orbiting in the habitable zone of its M4.5V dwarf host. Recent mass and radius constraints have indicated that it has either a thick H _2 -rich atmosphere or substantial water by mass. Here we present a tra
Externí odkaz:
https://doaj.org/article/3efaa7666be14f4a91beaf925b89187c
Autor:
Qing-Zeng Yan, Ji Yang, Yang Su, Yan Sun, Shaobo Zhang, Xin Zhou, Chen Wang, Yiping Ao, Xuepeng Chen, Min Wang
Publikováno v:
The Astrophysical Journal Letters, Vol 968, Iss 1, p L14 (2024)
In this work, we report a study on the relationship between flux and intensity for molecular clouds. Our analysis is established on high-quality CO images from the Milky Way Imaging Scroll Painting project. The new flux–intensity relation character
Externí odkaz:
https://doaj.org/article/e5bd7fa23df344b485827df61c1571d4
Autor:
D. R. Pasham, E. R. Coughlin, M. Zajaček, Itai Linial, Petra Suková, C. J. Nixon, Agnieszka Janiuk, M. Sniegowska, Vojtěch Witzany, V. Karas, M. Krumpe, D. Altamirano, T. Wevers, Riccardo Arcodia
Publikováno v:
The Astrophysical Journal Letters, Vol 963, Iss 2, p L47 (2024)
Quasiperiodic eruptions (QPEs) represent a novel class of extragalactic X-ray transients that are known to repeat at roughly regular intervals of a few hours to days. Their underlying physical mechanism is a topic of heated debate, with most models p
Externí odkaz:
https://doaj.org/article/2f3d3ef2748d46ad8b0d66a78af4ce6c
Autor:
Wenrui Xu, Songhu Wang
Publikováno v:
The Astrophysical Journal Letters, Vol 962, Iss 1, p L4 (2024)
In protoplanetary disks, sufficiently massive planets excite pressure bumps, which can then be preferred locations for forming new planet cores. We discuss how this loop may affect the architecture of multiplanet systems and compare our predictions w
Externí odkaz:
https://doaj.org/article/f94c985ee2434ae5a1fc1cbedf57937c
Autor:
Atila Poro, Kai Li, Raul Michel, Angel Castro, Eduardo Fernández Lajús, Li-Heng Wang, Jean-François Coliac, Yasemin Aladağ, Ailar Alizadehsabegh, Fahri Alicavus
Publikováno v:
The Astronomical Journal, Vol 168, Iss 6, p 272 (2024)
Photometric observations were made with standard filters in four observatories for 10 contact binary systems. We analyzed the orbital period variations of the systems and found that six of them show long-term changes. The increase in the orbital peri
Externí odkaz:
https://doaj.org/article/21b1614d29194cd7a8eb5e470c2d8cfc
Autor:
Hyungsuk Tak, Yang Chen, Vinay L. Kashyap, Kaisey S. Mandel, Xiao-Li Meng, Aneta Siemiginowska, David A. van Dyk
Publikováno v:
The Astrophysical Journal Supplement Series, Vol 275, Iss 2, p 30 (2024)
The acquisition of complex astronomical data is accelerating, especially with newer telescopes producing ever more large-scale surveys. The increased quantity, complexity, and variety of astronomical data demand a parallel increase in skill and sophi
Externí odkaz:
https://doaj.org/article/5909870e5510450eb5929a995611fc4b
Autor:
Yunlu Gong, Quangui Gao, Xiaopan Li, Min Yuan, Tingfeng Yi, Huaizhen Li, Longhua Qin, Haitao Yang, Haiyan Yang, Pengfei Zhang, Jun Fang, Li Zhang
Publikováno v:
The Astrophysical Journal, Vol 976, Iss 1, p 51 (2024)
We present periodicity search analyses on the long-term γ -ray light curve of the BL Lacertae object 4FGL J2139.4−4235 observed by the Fermi Large Area Telescope, over a period of more than 15 yr, from 2008 August 4 to 2023 December 10. To determi
Externí odkaz:
https://doaj.org/article/b78f61f5bc844a1fb77110d0a4ea19f8
Publikováno v:
The Astrophysical Journal Supplement Series, Vol 275, Iss 1, p 12 (2024)
Detached eclipsing binary (EB) systems are crucial for measuring the physical properties of stars that evolve independently. Large-scale time-domain surveys have released a substantial number of light curves for detached EBs. Utilizing the Physics of
Externí odkaz:
https://doaj.org/article/a0b2df576ee24b5b91c4a57351f38d0f