HD 101065—a G0 Star with High Metal Content

Przybylski, A.

doi:10.1038/189739a0

Cited by 45 publications

(27 citation statements)

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“…A few years later, Przybylski (1961) discovered a star (HD 101065) with properties that placed it far outside of the known limits of the stellar peculiarities. More precisely, Cowley et al (2000) performed abundance determination of this star for 54 elements and found that lanthanides were overabundant by 4-5 dex.…”

Section: Introductionmentioning

confidence: 99%

Atomic data for radioactive elements Ra I, Ra II, Ac I and Ac II and application to their detection in HD 101065 and HR 465

Quinet

Argante²,

Fivet³

et al. 2007

A&A

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Radiative data for transitions of astrophysical interest in radioactive elements Ra I, Ra II, Ac I and Ac II have been computed using a semi-empirical relativistic Hartree-Fock approach including core polarization effects. Most of the oscillator strengths reported in the present paper are new. A possible detection of radium (Ra II) and actinium (Ac II) in the spectrum of the stars HD 101065 and HR 465 is examined and discussed.

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Section: Introductionmentioning

confidence: 99%

Atomic data for radioactive elements Ra I, Ra II, Ac I and Ac II and application to their detection in HD 101065 and HR 465

Quinet

Argante²,

Fivet³

et al. 2007

A&A

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“…Since its discovery by Przybylski in 1961(Przybylski 1961 and named later after him, the Przybylski's star (HD 101065, hereafter PS) remains one of the most intriguing objects among chemically peculiar (CP) stars. These objects are usually characterized by abundance anomalies in their atmospheres and by non-uniform horizontal and vertical distributions of chemical elements and/or surface magnetic fields of different intensities.…”

Section: Introductionmentioning

confidence: 99%

Realistic model atmosphere and revised abundances of the coolest Ap star HD 101065

Shulyak

Ryabchikova

Kildiyarova

et al. 2010

A&A

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Aims. Among the known Ap stars, HD 101065 is probably one of the most interesting objects, demonstrating very rich spectra of rareearth elements (REE). Strongly peculiar photometric parameters of this star can not be fully reproduced by any modern theoretical calculations, even those accounting for realistic chemistry of its atmosphere. In this study we investigate a role of missing REE line opacity and construct a self-consistent atmospheric model based on accurate abundance and chemical stratification analysis. Methods. We employed the LLmodels stellar model atmosphere code together with DDAFit and Synthmag software packages to derive homogeneous and stratified abundances for 52 chemical elements and to construct a self-consistent model of HD 101065 atmosphere. The opacity in REE lines is accounted for in details, by using up-to-date extensive theoretical calculations. Results. We show that REE elements play a key role in the radiative energy balance in the atmosphere of HD 101065, leading to the strong suppression of the Balmer jump and energy redistribution very different from that of normal stars. Introducing new line lists of REEs allowed us to reproduce, for the first time, spectral energy distribution of HD 101065 and achieve a better agreement between the unusually small observed Strömgren c 1 index and the model predictions. Using combined photometric and spectroscopic approaches and based on the iterative procedure of abundance and stratification analysis we find effective temperature of HD 101065 to be T eff = 6400 K.

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“…• 7232 = V816 Cen HD 101065, also known as Przybylski's star, is one of the most peculiar stars known: its visible spectrum is strongly dominated by the rare earth lines (Przybylski 1961(Przybylski , 1963(Przybylski , 1966Cowley et al 1977) whose abundances are estimated as high as five orders of magnitude if compared to cosmic abundances (Wegner & Petford 1974). The iron peak elements, formerly considered to be underabundant in the visible spectrum, have been found to be strongly represented in the ultraviolet region 1900 − 3200Å (Wegner et al 1983).…”

Section: Hd 101065 = Cod−46mentioning

confidence: 99%