A study of Si II and S II features in spectra of Type Ia supernovae
A study of Si II and S II features in spectra of Type Ia supernovae
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Ia型超新星光谱中Si II和S II特征的研究
DOI:
10.1093/mnras/staa3985
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发表时间:
2021-04
影响因子:
4.8
通讯作者:
Sai Hanna
中科院分区:
文献类型:
--
作者:
Zhao Xulin;Maeda Keiichi;Wang Xiaofeng;Sai Hanna
We studied the spectral features of Siiiλλ4130, 5972, 6355 and the SiiW-trough for a large sample of Type Ia supernovae (SNe Ia). We found that in the NV (normal-velocity) subclass of SNe Ia, these features tend to reach a maximum line strength near maximum light, except for Siiiλ5972. Spectral features with higher excitation energy, such as the SiiW-trough, are relatively weak and have a relatively low velocity. SNe Ia with larger Δm15(B) tend to have lower velocities, especially at phases after maximum light. NV SNe show a trend of increasing line strength with increasing Δm15(B), while 91T/99aa-like SNe show an opposite trend. Near maximum light, the absorption depth of Siiiλ5972 shows the strongest correlation with Δm15(B), while at early times the sum of the depths of Siiiλλ4130 and 5972 shows the strongest correlation with Δm15(B). The overall correlation between velocity and line strength is positive, but within NV SNe the correlation is negative or unrelated, depending on the phase. In normal SNe Ia (including the high-velocity SNe), the velocity difference and depth ratio of a longer-wavelength feature to a shorter-wavelength feature tend to increase with increasing Δm15(B). These results are mostly well explained with atomic physics, but some puzzles remain, possibly related to the effects of saturation, line competition or other factors.
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DOI:
10.1086/429874
发表时间:
2005-02
期刊:
The Astrophysical Journal Letters
影响因子:
--
作者:
P. Mazzali;S. Benetti;G. Altavilla;G. Blanc;E. Cappellaro;N. Elias-Rosa;G. Garavini;G. Garavini;A. Goobar;A. Harutyunyan;R. Kotak;B. Leibundgut;P. Lundqvist;S. Mattila;J. Méndez;S. Nobili;S. Nobili;R. Pain;A. Pastorello;F. Patat;G. Pignata;P. Podsiadlowski;P. Ruiz-Lapuente;M. Salvo;B. Schmidt;J. Sollerman;V. Stanishev;M. Stehle;C. Tout;M. Turatto;W. Hillebrandt
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P. Mazzali;S. Benetti;G. Altavilla;G. Blanc;E. Cappellaro;N. Elias-Rosa;G. Garavini;G. Garavini;A. Goobar;A. Harutyunyan;R. Kotak;B. Leibundgut;P. Lundqvist;S. Mattila;J. Méndez;S. Nobili;S. Nobili;R. Pain;A. Pastorello;F. Patat;G. Pignata;P. Podsiadlowski;P. Ruiz-Lapuente;M. Salvo;B. Schmidt;J. Sollerman;V. Stanishev;M. Stehle;C. Tout;M. Turatto;W. Hillebrandt
DOI:
10.1086/307947
发表时间:
1999-03
期刊:
The Astrophysical Journal
影响因子:
--
作者:
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DOI:
10.1086/116177
发表时间:
1992-05
期刊:
The Astronomical Journal
影响因子:
--
作者:
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DOI:
10.1088/0067-0049/220/1/20
发表时间:
2015-08
期刊:
Astrophysical Journal, The - Supplement Series
影响因子:
--
作者:
Huang, Fang;Rui, Liming;Zhou, Qi;Mo, Jun
通讯作者:
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DOI:
10.3847/0004-637x/826/1/56
发表时间:
2016-04
期刊:
The Astrophysical Journal
影响因子:
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作者:
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通讯作者:
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