NLTE Spectral Analysis of Iron Group Elements in the Hot Subluminous O-star BD+28 4211

M. Ramspeck; S. Haas; R. Napiwotzki; U. Heber; J. Deetjen; S. Dreizler

NLTE Spectral Analysis of Iron Group Elements in the Hot Subluminous O-star BD+28 4211

M. Ramspeck, S. Haas, R. Napiwotzki, U. Heber, J. Deetjen, S. Dreizler

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Abstract

An analysis of UV spectra of BD+28circ4211 obtained with the STIS spectrograph onboard the HST is presented. The spectral analysis is based on NLTE model calculation, which deal with the lineblanketing of iron group elements in great detail. Improved model atoms for iron group elements were set up and new interband cross sections were calculated. Comparison with observation allowed, Mn and Cr lines to be identified for the first time. The abundances of Fe, Ni, Cr and Mn are determined and point to the presence of diffusion processes in the atmosphere of BD+28circ4211.

Original language	English
Title of host publication	In: Stellar Atmosphere Modeling - ASP Conf Series 288
Publisher	Astronomical Society of the Pacific
Pages	161-164
ISBN (Print)	1-58381-131-1, 978-1-58381-623-3
Publication status	Published - 2003

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@inproceedings{195a58a96f8b4cc9817ee329bb40f520,

title = "NLTE Spectral Analysis of Iron Group Elements in the Hot Subluminous O-star BD+28 4211",

abstract = "An analysis of UV spectra of BD+28circ4211 obtained with the STIS spectrograph onboard the HST is presented. The spectral analysis is based on NLTE model calculation, which deal with the lineblanketing of iron group elements in great detail. Improved model atoms for iron group elements were set up and new interband cross sections were calculated. Comparison with observation allowed, Mn and Cr lines to be identified for the first time. The abundances of Fe, Ni, Cr and Mn are determined and point to the presence of diffusion processes in the atmosphere of BD+28circ4211.",

author = "M. Ramspeck and S. Haas and R. Napiwotzki and U. Heber and J. Deetjen and S. Dreizler",

note = "Original paper can be found at: http://www.astrosociety.org/pubs/cs/286.html Copyright ASP",

year = "2003",

language = "English",

isbn = "1-58381-131-1",

pages = "161--164",

booktitle = "In: Stellar Atmosphere Modeling - ASP Conf Series 288",

publisher = "Astronomical Society of the Pacific",

address = "United States",

}

TY - GEN

T1 - NLTE Spectral Analysis of Iron Group Elements in the Hot Subluminous O-star BD+28 4211

AU - Ramspeck, M.

AU - Haas, S.

AU - Napiwotzki, R.

AU - Heber, U.

AU - Deetjen, J.

AU - Dreizler, S.

N1 - Original paper can be found at: http://www.astrosociety.org/pubs/cs/286.html Copyright ASP

PY - 2003

Y1 - 2003

N2 - An analysis of UV spectra of BD+28circ4211 obtained with the STIS spectrograph onboard the HST is presented. The spectral analysis is based on NLTE model calculation, which deal with the lineblanketing of iron group elements in great detail. Improved model atoms for iron group elements were set up and new interband cross sections were calculated. Comparison with observation allowed, Mn and Cr lines to be identified for the first time. The abundances of Fe, Ni, Cr and Mn are determined and point to the presence of diffusion processes in the atmosphere of BD+28circ4211.

AB - An analysis of UV spectra of BD+28circ4211 obtained with the STIS spectrograph onboard the HST is presented. The spectral analysis is based on NLTE model calculation, which deal with the lineblanketing of iron group elements in great detail. Improved model atoms for iron group elements were set up and new interband cross sections were calculated. Comparison with observation allowed, Mn and Cr lines to be identified for the first time. The abundances of Fe, Ni, Cr and Mn are determined and point to the presence of diffusion processes in the atmosphere of BD+28circ4211.

M3 - Conference contribution

SN - 1-58381-131-1

SN - 978-1-58381-623-3

SP - 161

EP - 164

BT - In: Stellar Atmosphere Modeling - ASP Conf Series 288

PB - Astronomical Society of the Pacific

ER -

NLTE Spectral Analysis of Iron Group Elements in the Hot Subluminous O-star BD+28 4211

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