Chemical surface inhomogeneities in late B-type stars with Hg and Mn peculiarity - I. Spot evolution in HD 11753 on short and long time scales
Chemical surface inhomogeneities in late B-type stars with Hg and Mn peculiarity - I. Spot evolution in HD 11753 on short and long time scales
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具有 Hg 和 Mn 特性的晚期 B 型恒星的化学表面不均匀性 - I HD 11753 中短期和长期尺度的光点演化
DOI:
10.1051/0004-6361/201220951
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发表时间:
2013
影响因子:
6.5
通讯作者:
W. Pessemier
中科院分区:
文献类型:
--
作者:
H. Korhonen;J. F. González;M. Briquet;M. Flores Soriano;S. Hubrig;I. Savanov;T. Hackman;I. Ilyin;E. Eulaers;W. Pessemier
AimsTime series of high-resolution spectra of the late B-type star HD 11753 exhibiting HgMn chemical peculiarity are used to study the surface distribution of different chemical elements and their temporal evolution.MethodsHigh-resolution and high signal-to-noise ratio spectra were obtained using the CORALIE spectrograph at La Silla in 2000, 2009, and 2010. Surface maps of Y ii, Sr ii, Ti ii, and Cr ii were calculated using the Doppler imaging technique. The results were also compared to equivalent width measurements. The evolution of chemical spots both on short and long time scales were investigated.ResultsWe determine the binary orbit of HD 11753 and fine-tune the rotation period of the primary. The earlier discovered fast evolution of the chemical spots is confirmed by an analysis using both the chemical spot maps and equivalent width measurements. In addition, a long-term decrease in the overall Y ii and Sr ii abundances is discovered. A detailed analysis of the chemical spot configurations reveals some possible evidence that a very weak differential rotation is operating in HD 11753.
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影响因子:
6.5
作者:
Linus Dolk;G. Wahlgren;S. Hubrig
通讯作者:
S. Hubrig
影响因子:
6.5
作者:
M. Briquet;H. Korhonen;J. F. González;S. Hubrig;T. Hackman
通讯作者:
T. Hackman
DOI:
--
发表时间:
2009
期刊:
影响因子:
--
作者:
D. Ségransan;S. Udry;M. Mayor;D. Naef;F. Pepe;D. Queloz;Nuno C. Santos;B. Demory;P. Figueira;M. Gillon;M. Gillon;M. Marmier;Denis Mégevand;D. Sosnowska;O. Tamuz;A. Triaud
通讯作者:
A. Triaud
DOI:
--
发表时间:
2003
期刊:
影响因子:
--
作者:
I. Savanov;S. Hubrig
通讯作者:
S. Hubrig
DOI:
--
发表时间:
2010
期刊:
影响因子:
--
作者:
M. Thiam;F. Leblanc;V. Khalack;G. Wade
通讯作者:
G. Wade