Abundance analysis, spectral variability, and search for the presence of a magnetic field in the typical PGa star HD 19400

S. Hubrig, F. Castelli, J.F. González, T.A. Carroll, I. Ilyin, M. Schöller, N.A. Drake, H. Korhonen, M. Briquet

Результат исследований: Научные публикации в периодических изданияхстатья

5 Цитирования (Scopus)

Аннотация

The aim of this study is to carry out an abundance determination, to search for spectral variability and for the presence of a weak magnetic field in the typical PGa star HD 19400. High-resolution, high signal-to-noise High Accuracy Radial-velocity Planet Searcher (HARPS) spectropolarimetric observations of HD 19400 were obtained at three different epochs in 2011 and 2013. For the first time, we present abundances of various elements determined using an ATLAS12 model, including the abundances of a number of elements not analysed by previous studies, such as Ne I, Ga II, and Xe II. Several lines of As II are also present in the spectra of HD 19400. To study the variability, we compared the behaviour of the line profiles of various elements. We report on the first detection of anomalous shapes of line profiles belonging to Mn and Hg, and the variability of the line profiles belonging to the elements Hg, P, Mn, Fe, and Ga. We suggest that the variability of the line profiles of these elements is caused by their
Язык оригиналаанглийский
Страницы (с-по)3604-3615
ЖурналMonthly Notices of the Royal Astronomical Society
Том442
Номер выпуска4
DOI
СостояниеОпубликовано - 2014

Fingerprint Подробные сведения о темах исследования «Abundance analysis, spectral variability, and search for the presence of a magnetic field in the typical PGa star HD 19400». Вместе они формируют уникальный семантический отпечаток (fingerprint).

  • Цитировать