Results 61 to 70 of about 39,906 (300)
The Astrophysical Journal, 2023 In previous work, we identified a population of 38 cool and luminous variable stars in the Magellanic Clouds and examined 11 in detail in order to classify them as either Thorne–Żytkow objects (TŻOs; red supergiants with a neutron star cores) or super ...
Anna J. G. O‘Grady +11 more
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Radio emission from chemically peculiar stars
The Astrophysical Journal, 1992 In five VLA observing runs the initial survey of radio emission from magnetic Bp-Ap stars by Drake et al. is extended to include a total of 16 sources detected at 6 cm out of 61 observed, giving a detection rate of 26 percent. Of these stars, three are also detected at 2 cm, four at 3.6 cm, and five at 20 cm.
Jeffrey L. Linsky +2 more
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Diffusional Separation of Calcium Isotopes in Chemically Peculiar Stellar Atmospheres
Open Astronomy, 2014 Diffusional separation of calcium isotopes in the atmospheres of hot chemically peculiar stars is studied. In addition to the usual radiative acceleration effect, the light-induced drift is taken into account.
Sapar L. +3 more
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Ba-enhanced Dwarf and Subgiant Stars in the LAMOST Galactic Surveys
The Astrophysical Journal, 2023 Ba-enhanced stars are interesting probes of stellar astrophysics and Galactic formation history. In this work, we investigate the chemistry and kinematics of a large sample of Ba-enhanced ([Ba/Fe]>1.0) dwarf and subgiant stars with 5000 < T _eff < 6700 K
Meng Zhang +5 more
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An investigation of the rotational properties of magnetic chemically peculiar stars [PDF]
, 2017 The magnetic chemically peculiar (mCP) stars of the upper main sequence exhibit strong, globally organized magnetic fields that are inclined to the rotational axis and facilitate the development of surface abundance inhomogeneities resulting in ...
M. Netopil +3 more
semanticscholar +1 more source
Chemically peculiar stars as members of open clusters
Monthly notices of the Royal Astronomical SocietyThe chemically peculiar (CP) stars of the upper main sequence are excellent astrophysical laboratories to test the diffusion, mass-loss, rotational mixing, and pulsation in the (non-)presence of a stable local magnetic field.
N. Faltová +14 more
semanticscholar +1 more source
Detection of magnetic fields in chemically peculiar stars observed with the K2 space mission [PDF]
, 2018 We report the results of an observational study aimed at searching for magnetic pulsating hot stars suitable for magneto-asteroseismology.
B. Buysschaert +9 more
semanticscholar +1 more source
On the first δ Sct–roAp hybrid pulsator and the stability of p and g modes in chemically peculiar A/F stars [PDF]
, 2020 Strong magnetic fields in chemically peculiar A-type (Ap) stars typically suppress low-overtone pressure modes (p modes) but allow high-overtone p modes to be driven. KIC 11296437 is the first star to show both. We obtained and analysed a Subaru spectrum,
S. Murphy +6 more
semanticscholar +1 more source
Evolutionary state of magnetic chemically peculiar stars [PDF]
Astronomy & Astrophysics, 2006 We present a comprehensive statistical investigation of the evolution of magnetic CP stars, aimed at providing constraints to the theories that deal with the origin of the magnetic field in these stars. We have collected from the literature data for 150 magnetic CP stars with accurate Hipparcos parallaxes.
Bagnulo, S. +3 more
openaire +2 more sources
The Astrophysical Journal, 2023 Carbon-deficient red giants (CDGs) are a peculiar class of stars that have eluded explanation for decades. We aim to better characterize CDGs by using asteroseismology (Kepler, TESS) combined with spectroscopy (APOGEE, LAMOST), and astrometry (Gaia).
Sunayana Maben +4 more
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