Zobrazeno 1 - 10
of 5 284
pro vyhledávání: '"peculiar stars"'
Autor:
Kueß, L., Paunzen, E., Faltová, N., Jadlovský, D., Labaj, M., Mesarč, M., Mondal, P., Prišegen, M., Ramezani, T., Supíková, J., Svačinková, K., Vítková, M., Xia, C., Bernhard, K., Hümmerich, S.
Publikováno v:
A&A 687, A176 (2024)
Context. The chemically peculiar (CP) stars of the upper main sequence are defined by spectral peculiarities that indicate unusual elemental abundance patterns in the presence of diffusion in the calm, stellar atmospheres. Some of them have a stable
Externí odkaz:
http://arxiv.org/abs/2405.08946
Autor:
Paunzen, Ernst
Publikováno v:
A&A 683, L7 (2024)
The chemically peculiar (CP) stars of the upper main sequence are excellent astrophysical laboratories for investigating the diffusion, mass loss, rotational mixing, and pulsation in the presence and absence of a stable local magnetic field. For this
Externí odkaz:
http://arxiv.org/abs/2402.18990
Akademický článek
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Autor:
Monier, Richard, Niemczura, E., Kurtz, D. W., Rappaport, S., Bowman, D. M., Murphy, Simon J., Lebreton, Yveline, Stuik, Remko, Deal, Morgan, Merle, Thibault, Kılıçoğlu, Tolgahan, Gebran, Marwan, Ster, Ewen Le
We report on a detailed abundance study of six bright, mostly southern, slowly rotating late B stars: HD~1279 (B8III), HD~99803 (B9V), HD~123445 (B9V), HD~147550 (B9V), HD~171961 (B8III) and HD~202671 (B5II/III), hitherto reported as normal stars. We
Externí odkaz:
http://arxiv.org/abs/2306.01601
Publikováno v:
A&A 676, A55 (2023)
High-quality light curves from space missions have opened up a new window on the rotational and pulsational properties of magnetic chemically peculiar (mCP) stars and have fuelled asteroseismic studies. They allow the internal effects of surface magn
Externí odkaz:
http://arxiv.org/abs/2306.12861
Akademický článek
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We present detailed chemical compositions of four stars on the first-ascent red giant branch that are classified as chemically peculiar, but lack comprehensive analyses at high spectral resolution. For BD+03{\deg}2688, HE 0457-1805, HE 1255-2324, and
Externí odkaz:
http://arxiv.org/abs/2211.08627
Autor:
Worthey, Guy, Shi, Xiang
Integrated-light models that incorporate common types of chemically peculiar (CP) stars are assembled using synthetic spectra. Selected spectral features encode significant age information for populations with ages $\sim$50 Myr $<$ age $< \sim$2 Gyr.
Externí odkaz:
http://arxiv.org/abs/2211.05083
Autor:
Romanyuk, Iosif1 roman@sao.ru
Publikováno v:
Universe (2218-1997). Dec2021, Vol. 7 Issue 12, p1-21. 21p.
The recently re-discovered open cluster Stock 2, located roughly 375 pc away and about 400 Myr old, has the potential to be an exciting new testbed for our understanding of stellar evolution. We present results from a spectroscopic campaign to charac
Externí odkaz:
http://arxiv.org/abs/2210.09301