Results 1 to 10 of about 531 (218)
Studies of Magnetic Chemically Peculiar Stars Using the 6-m Telescope at SAO RAS
Universe, 2021 We present a survey of the most important results obtained in observations with the 6-m telescope in the studies of magnetic fields of chemically peculiar stars.
Iosif Romanyuk
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The Astronomical Journal, 2023 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.
Richard Monier +12 more
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A spectral atlas of λ Bootis stars [PDF]
Serbian Astronomical Journal, 2014 Since the discovery of λ Bootis stars, a permanent confusion about their classification can be found in literature. This group of non-magnetic, Population I, metal-poor A to F-type stars, has often been used as some sort of trash can for "exotic"
Paunzen E., Heiter U.
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Most Rotational Variables Dominated by a Single Bright Feature Are α 2 CVn Stars
The Astronomical Journal, 2023 We previously reported a rare class of variable star light curves isolated from a sample of 4.7 million candidate variables from the ATLAS survey. Dubbed “UCBH” light curves, they have broad minima and narrow, symmetrical maxima, with typical periods of ...
A. N. Heinze +2 more
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Reddening-Free Q Parameters to Classify B-Type Stars with Emission Lines
Galaxies, 2023 The emission-line B-type stars constitute a heterogeneous group. Many of these stars show similar optical spectroscopic features and color indices, making it difficult to classify them adequately by means of photometric and spectroscopic techniques. Thus,
Yael Aidelman, Lydia Sonia Cidale
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Searching for Barium Stars from the LAMOST Spectra Using the Machine-learning Method: I
The Astronomical Journal, 2023 Barium stars are chemically peculiar stars that exhibit enhancement of s -process elements. Chemical abundance analysis of barium stars can provide crucial clues for the study of the chemical evolution of the Galaxy. The Large Sky Area Multi-Object Fiber
Fengyue Guo +7 more
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Spectroscopy of a chemically peculair delta scuti-type star: 60 tau
Cumhuriyet Science Journal, 2020 In this study, a detailed spectroscopic analysis of 60 Tau is presented. 60 Tau is a Delta Scuti-type pulsating variable and it is also a metallic-lined (Am) star.
Filiz Kahraman Aliçavuş
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Subaru and Salt Spectroscopy of Chemically Peculiar Hot Subdwarfs
Open Astronomy, 2017 The majority of hot subdwarfs lie on or close to the helium main-sequence. Many have hydrogen-rich surfaces, but a substantial fraction of the hotter subdwarfs have hydrogen-depleted or hydrogen-deficient surfaces. Amongst the former, three were known to
Jeffery C. Simon +4 more
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Summary of Eighth Meeting on Hot Subdwarfs and Related Objects
Open Astronomy, 2017 Subjects discussed during the Eighth Meeting on Hot Subdwarfs and Related Objects are summarised. In particular, a succinct presentation is given of challenges to stellar evolution arising from recent observations.
Lynas-Gray Anthony Eugene
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A New Catalog of Am-type Chemically Peculiar Stars Based on LAMOST
The Astrophysical Journal Supplement Series, 2023 A total of about 21,600 Am candidates were detected with the MKCLASS code based on the low-resolution spectra of the Large Sky Area Multi-Object Fiber Spectroscopic Telescope Data Releases 8 (v1.0), 9 (v0), and 10 (v0), which greatly expands the database
Xiao-man Tian +3 more
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