English
Related papers

Related papers: Chemically peculiar stars as seen with 2MASS

200 papers

We present the first results of a volume-limited survey of main sequence (MS) magnetic chemically peculiar (mCP) stars. The sample consists of all identified intermediate-mass MS stars (mCP and non-mCP) within a heliocentric distance of…

Solar and Stellar Astrophysics · Physics 2018-11-28 J. Sikora , G. A. Wade , J. Power , C. Neiner

The magnetic chemically peculiar (CP2) stars of the upper main sequence are well-suited for investigating the impact of magnetic fields on the surface layers of stars, which leads to abundance inhomogeneities (spots) resulting in…

Solar and Stellar Astrophysics · Physics 2015-12-15 K. Bernhard , S. Huemmerich , E. Paunzen

The study of chemically peculiar (CP) stars in open clusters provides valuable information about their evolutionary status. Their detection can be performed using the $\Delta a$ photometric system, which maps a characteristic flux…

Magnetic chemically peculiar (mCP) stars are strongly magnetic upper main-sequence stars that exhibit light rotational variability due to an uneven surface distribution of certain peculiar elements, which may appear in phase at certain…

Magnetic chemically peculiar (mCP) stars allow the investigation of such diverse phenomena as atomic diffusion, magnetic fields and stellar rotation. The aim of the present investigation is to enhance our knowledge of the rotational…

Astrophysics of Galaxies · Physics 2020-02-26 Klaus Bernhard , Stefan Huemmerich , Ernst Paunzen

The atmospheric structure of chemically peculiar stars deviates from that of normal stars with similar fundamental parameters due to unusual chemistry, abundance inhomogeneities and the presence of strong magnetic field. These effects are…

Astrophysics · Physics 2007-12-03 O. Kochukhov , D. Shulyak

The galactic magnetic chemically peculiar (mCP) stars of the upper main sequence are well known as periodic spectral and light variables. The observed variability is obviously caused by the uneven distribution of overabundant chemical…

Solar and Stellar Astrophysics · Physics 2013-07-19 E. Paunzen , Z. Mikulasek , R. Poleski , J. Krticka , M. Netopil , M. Zejda

The magnetic chemically peculiar (mCP) stars of the upper main sequence are perfectly suited to studying the effects of rotation, diffusion, mass-loss, accretion, and pulsation in the presence of an organized stellar magnetic field.…

Solar and Stellar Astrophysics · Physics 2022-11-16 E. Paunzen , M. Prisegen

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…

Astrophysics · Physics 2009-11-11 O. Kochukhov , S. Bagnulo

In this paper we present a new catalogue of Chemically Peculiar (CP) stars obtained by compiling publications in which abundances of metals are provided. Our catalogue includes 428 stars for which the data were obtained through…

Solar and Stellar Astrophysics · Physics 2018-08-01 S. Ghazaryan , G. Alecian , A. A. Hakobyan

Since the end of 2018, the Transiting Exoplanet Survey Satellite (TESS) has provided stellar photometry to the astronomical community. We have used TESS data to study rotational modulation in the light curves of a sample of chemically…

Solar and Stellar Astrophysics · Physics 2022-10-12 O. Kobzar , V. Khalack , D. Bohlender , G. Mathys , M. E. Shultz , D. M. Bowman , E. Paunzen , C. Lovekin , A. David-Uraz , J. Sikora , P. Lampens , O. Richard

We present a comprehensive overview of the properties of a sample of 41 magnetic chemically peculiar stars that have been recently identified in the Kepler field by our team (H\"{u}mmerich et al. 2018). The stars populate the whole age…

Solar and Stellar Astrophysics · Physics 2019-03-14 Zdeněk Mikulášek , Ernst Paunzen , Stefan Hümmerich , Jan Janík , Klaus Bernhard , Jiří Krtička , Ilya A. Yakunin

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…

Solar and Stellar Astrophysics · Physics 2023-08-09 J. Labadie-Bartz , S. Hümmerich , K. Bernhard , E. Paunzen , M. E. Shultz

We continue our survey for magnetic chemically peculiar (CP2) stars in galactic open clusters to shed more light on their origin and evolution. To study the group of CP2 stars, it is essential to find these objects in different galactic…

In a sample of six young open clusters we investigated 1753 objects using the narrow band, three filter Delta a photometric system resulting in the detection of eleven bona-fide magnetic chemically peculiar (CP) stars and five Be or…

Astrophysics · Physics 2009-11-11 E. Paunzen , M. Netopil , I. Kh. Iliev , H. M. Maitzen , A. Claret , O. I. Pintado

Photometrically and spectroscopically variable chemically peculiar (CP) stars are the optimum laboratories for testing the rotational evolution of main sequence stars. A vast majority of well-studied CP stars have quite steady rotational…

Solar and Stellar Astrophysics · Physics 2011-06-22 Zdenek Mikulasek , Jiri Krticka , Jan Janik , Juraj Zverko , Jozef Ziznovsky , Pavel Zverina , Miloslav Zejda

We have summarized all Delta a measurements for galactic field stars (1474 objects) from the literature published over more than two decades. These measurements were, for the first time, compiled and homogeneously analyzed. The Delta a…

Astrophysics · Physics 2009-11-11 E. Paunzen , Ch. Stuetz , H. M. Maitzen

Many chemically peculiar (CP) stars, especially the magnetic CP2 stars, show a flux depression at 5200A. The "Delta a" photometric System takes advantage of this characteristic to detect these objects in an efficient way. In addition, it is…

Astrophysics of Galaxies · Physics 2014-02-06 Ch. Stigler , H. M. Maitzen , E. Paunzen , M. Netopil

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 $<…

Astrophysics of Galaxies · Physics 2022-11-30 Guy Worthey , Xiang Shi

We present a comprehensive analysis of BRITE photometry for 85 chemically peculiar stars, aimed at refining or determining their rotational periods. Utilizing a uniform Lomb-Scargle-based pipeline, we derived significant periods for 47…

Solar and Stellar Astrophysics · Physics 2026-01-28 Teja Begari , Klaus Bernhard , Ernst Paunzen , Prapti Mondal