The virtual observatory service TheoSSA: Establishing a database of synthetic stellar flux standards II. NLTE spectral analysis of the OB-type subdwarf Feige 110
The virtual observatory service TheoSSA: Establishing a database of synthetic stellar flux standards II. NLTE spectral analysis of the OB-type subdwarf Feige 110
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虚拟天文台服务TheoSSA:建立OB型亚矮星Feige 110的合成恒星通量标准II NLTE光谱分析数据库
DOI:
10.1051/0004-6361/201423711
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发表时间:
2014
影响因子:
6.5
通讯作者:
Moehler
中科院分区:
文献类型:
--
作者:
Rudkowski;Kampka;Werner;Moehler
ContextIn the framework of the Virtual Observatory (VO), the German Astrophysical VO (GAVO) developed the registered service TheoSSA (Theoretical Stellar Spectra Access). It provides easy access to stellar spectral energy distributions (SEDs) and is intended to ingest SEDs calculated by any model-atmosphere code, generally for all effective temperatures, surface gravities, and elemental compositions. We will establish a database of SEDs of flux standards that are easily accessible via TheoSSA’s web interface.AimsThe OB-type subdwarf Feige 110 is a standard star for flux calibration. State-of-the-art non-local thermodynamic equilibrium stellar-atmosphere models that consider opacities of species up to trans-iron elements will be used to provide a reliable synthetic spectrum to compare with observations.MethodsIn case of Feige 110, we demonstrate that the model reproduces not only its overall continuum shape from the far-ultraviolet (FUV) to the optical wavelength range but also the numerous metal lines exhibited in its FUV spectrum.ResultsWe present a state-of-the-art spectral analysis of Feige 110. We determined , logg= 6.00 ± 0.20, and the abundances of He, N, P, S, Ti, V, Cr, Mn, Fe, Co, Ni, Zn, and Ge. Ti, V, Mn, Co, Zn, and Ge were identified for the first time in this star. Upper abundance limits were derived for C, O, Si, Ca, and Sc.ConclusionsThe TheoSSA database of theoretical SEDs of stellar flux standards guarantees that the flux calibration of astronomical data and cross-calibration between different instruments can be based on models and SEDs calculated with state-of-the-art model-atmosphere codes.
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DOI:
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发表时间:
1973
期刊:
影响因子:
--
作者:
E. B. Newell
通讯作者:
E. B. Newell
DOI:
10.1051/0004-6361/201423790
发表时间:
2014-08
期刊:
arXiv: Instrumentation and Methods for Astrophysics
影响因子:
--
作者:
S. Moehler;A. Modigliani;W. Freudling;Noemi Giammichele;Alexandros Gianninas;A. Gonneau;W. Kausch;Ariane Lançon;Stefan Noll;Thomas Rauch;J. Vinther
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S. Moehler;A. Modigliani;W. Freudling;Noemi Giammichele;Alexandros Gianninas;A. Gonneau;W. Kausch;Ariane Lançon;Stefan Noll;Thomas Rauch;J. Vinther
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发表时间:
2003
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影响因子:
6.5
作者:
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通讯作者:
J. Kruk