Results 51 to 60 of about 39,906 (300)
Near infrared light variations of chemically peculiar stars. The SrCrEu stars [PDF]
Astronomy and Astrophysics Supplement Series, 1998 Twenty magnetic Chemically Peculiar (CP2) stars of the SrCrEu subgroup mostly brighter than the 7.5 visual magnitude have been investigated in the near infrared at 1.25, 1.6 and 2.2 μ . The stars HD 3980, HD 24712, HD 49976, HD 83368, HD 96616, HD 98088, HD 118022, HD 125248, HD 148898, HD 203006, and HD 220825 have been found to be variable in the ...
Catalano FA, LEONE, Francesco, Kroll R.
openaire +2 more sources
Searching for Dust around Hyper Metal-Poor Stars [PDF]
, 2014 We examine the mid-infrared fluxes and spectral energy distributions for metal-poor stars with iron abundances [Fe/H] $\lesssim-5$, as well as two CEMP-no stars, to eliminate the possibility that their low metallicities are related to the depletion of ...
Cote, Stephanie +5 more
core +2 more sources
Chemically Peculiar Stars in Galaxies
, 2023 In an aging stellar population, the number fractions of chemically peculiar (CP) stars rise and fall periodically, and the fractions are high enough that their spectra features survive to appear in integrated light at subtle levels. Chemically peculiar stars are suggested to be used to disentangle an age history from integrated light spectroscopy.
openaire +2 more sources
Chemically peculiar stars and their temperature calibration [PDF]
Astronomy & Astrophysics, 2008 15 pages, 8 figures, accepted by A& ...
Netopil, Martin +4 more
openaire +3 more sources
Partly burnt runaway stellar remnants from peculiar thermonuclear supernovae [PDF]
, 2019 We report the discovery of three stars that, along with the prototype LP40-365, form a distinct class of chemically peculiar runaway stars that are the survivors of thermonuclear explosions.
Fusillo, N. P. Gentile +15 more
core +1 more source
Hot Magnetic Stars in Exotic Multiple Systems [PDF]
EPJ Web of Conferences, 2020 A strong and stable magnetic field covering the whole surface is a landmark of chemically peculiar or CP stars. To explain the origin of mag- netic stars, several hypotheses were proposed, which depending on the mech- anism and time of formation can be ...
Semenko Eugene
doaj +1 more source
Some features of roAp stars spectrum
Odessa Astronomical Publications, 2017 We have shown the possibility for modelling Li blend6708 A, for two roAp stars, HD83368 and HD60435, taking into account lithium spots on the surfaces of these rotating stars. REE spots were also included in calculations.
A. V. Shavrina +6 more
doaj +1 more source
Spectroscopic Study of Ba and CEMP-s Stars: Mass Distribution of AGB Progenitors
The Astronomical Journal, 2023 We have performed detailed high-resolution spectroscopic analysis on seven metal-poor stars (BD+75 348, BD+09 3019, HD238020, HE0319–0215, HE0507–1653, HE0930–0018, HE1023–1504) and derived their atmospheric parameters T _eff , log g , [Fe/H], and ...
Partha Pratim Goswami, Aruna Goswami
doaj +1 more source
Three very young HgMn stars in the Orion OB1 Association [PDF]
, 1999 We report the detection of three mercury-manganese stars in the Orion OB1 association. HD 37886 and BD-0 984 are in the approximately 1.7 million year old Orion OB1b. HD 37492 is in the approximately 4.6 million year old Orion OB1c. Orion OB1b is now the
Brown A. G. A. +14 more
core +3 more sources
Chromospheres of Chemically Peculiar Giant Stars [PDF]
International Astronomical Union Colloquium, 1989 AbstractA review is given of the chromospheres of evolved stars with peculiar chemical abundances, emphasizing the observed dependence of chromospheric properties upon the evolutionary status of the stars. Some old and new physical processes which are potentially important in determining the observed chromospheric features are discussed.
openaire +1 more source