Zobrazeno 1 - 10
of 1 482
pro vyhledávání: '"Carbon stars"'
Autor:
H. Gupta, P. B. Changala, J. Cernicharo, J. R. Pardo, M. Agúndez, C. Cabezas, B. Tercero, M. Guélin, M. C. McCarthy
Publikováno v:
The Astrophysical Journal Letters, Vol 966, Iss 2, p L28 (2024)
Calcium dicarbide, CaC _2 , has been characterized at high resolution in the laboratory, and its main isotopologue, ^40 CaC _2 , has been assigned to 14 rotational emission lines between 14 and 115 GHz, including 12 previously unassigned lines, in th
Externí odkaz:
https://doaj.org/article/5fb2c8a451cb45d19b35b62388fccd41
Akademický článek
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Publikováno v:
The Astrophysical Journal Supplement Series, Vol 274, Iss 1, p 6 (2024)
Carbon stars play a crucial role in astronomical research and are significant for understanding stellar evolution, measuring cosmic distances, and studying galaxy kinematics. In recent years, identifying carbon stars using machine learning methods an
Externí odkaz:
https://doaj.org/article/8ad272dc09234e2bbf77acadf2cbc9ef
Autor:
Abigail J. Lee, Andrew J. Monson, Wendy L. Freedman, Barry F. Madore, Kayla A. Owens, Rachael L. Beaton, Coral Espinoza, Tongtian Ren, Yi Ren
Publikováno v:
The Astrophysical Journal, Vol 967, Iss 1, p 22 (2024)
We present near-infrared JHK photometry for the resolved stellar populations in 13 nearby galaxies: NGC 6822, IC 1613, NGC 3109, Sextans B, Sextans A, NGC 300, NGC 55, NGC 7793, NGC 247, NGC 5253, Cen A, NGC 1313, and M83, acquired from the 6.5 m Baa
Externí odkaz:
https://doaj.org/article/2567cdc6e55b4add8900cc4b5061787c
Autor:
Kyung-Won Suh
Publikováno v:
The Astrophysical Journal Supplement Series, Vol 272, Iss 1, p 16 (2024)
We explore the characteristics of carbon stars within our Galaxy through a comprehensive analysis of observational data spanning visual and infrared (IR) bands. Leveraging data sets from IRAS, the Infrared Space Observatory, Akari, the Midcourse Spac
Externí odkaz:
https://doaj.org/article/e9fbf715ec1d4d9d8ce945b151f48f08
Autor:
Francesco Addari, Paola Marigo, Alessandro Bressan, Guglielmo Costa, Kendall Shepherd, Guglielmo Volpato
Publikováno v:
The Astrophysical Journal, Vol 964, Iss 1, p 51 (2024)
The initial–final mass relation (IFMR) plays a crucial role in understanding stellar structure and evolution by linking a star’s initial mass to the mass of the resulting white dwarf. This study explores the IFMR in the initial mass range 0.8 ≤
Externí odkaz:
https://doaj.org/article/da4a6222741c4f4c8d7401fe460e3af2
Autor:
Linlin Li, Kecheng Zhang, Wenyuan Cui, Jianrong Shi, Wei Ji, Zhenyan Huo, Yawei Gao, Shuai Zhang, Mingxu Sun
Publikováno v:
The Astrophysical Journal Supplement Series, Vol 271, Iss 1, p 12 (2024)
Carbon stars are excellent kinematic tracers of galaxies and play important roles in understanding the evolution of the Galaxy. Therefore, it is worthwhile to search for them in a large number of spectra. In this work, we build a new carbon star cata
Externí odkaz:
https://doaj.org/article/0666120bffdf478d9d506ade1fbf9602
Publikováno v:
The Astrophysical Journal, Vol 961, Iss 1, p 132 (2024)
The J-region Asymptotic Giant Branch (JAGB) method is a standard candle that leverages the constant luminosities of color-selected, carbon-rich AGB stars, measured in the near-infrared at 1.2 μ m. The Chicago-Carnegie Hubble Program has obtained JWS
Externí odkaz:
https://doaj.org/article/269b4abd4ff3421ab82e612d1aad5346
Akademický článek
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Autor:
Abigail J. Lee
Publikováno v:
The Astrophysical Journal, Vol 956, Iss 1, p 15 (2023)
The J-region Asymptotic Giant Branch (JAGB) method is a standard candle based on the intrinsic luminosities of carbon stars in the near-infrared. We directly constrain the impact of metallicity, age, and reddening on the JAGB method. We assess how th
Externí odkaz:
https://doaj.org/article/0f2a616c0b1c4b03b134a770669c2f48