Long-slit Spectroscopy of Edge-on Low Surface Brightness Galaxies
Long-slit Spectroscopy of Edge-on Low Surface Brightness Galaxies
复制标题
边缘低表面亮度星系的长缝光谱
DOI：
10.3847/1538-4357/aa6194
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发表时间：
2017-02
期刊：
影响因子：
--
通讯作者：
Alexei V. Filippenko
中科院分区：
文献类型：
--
作者：
Du Wei;Wu Hong;Zhu Yinan;Zheng Weikang;Alexei V. Filippenko
我们展示了 12 个沿其长轴定位的边缘低表面亮度星系 (LSBG) 的长缝光谱。对提取的积分光谱测量的发射线通量进行红化校正后，我们使用 [N ii]/Hα 和 R23 诊断测量 LSBG 样品的气相金属丰度。两组氧丰度彼此吻合，中值为 12 + log(O/H) = 8.26 dex。在光度-金属丰度图中，我们的 LSBG 样本与正常星系的行为一致。在质量-金属丰度图中，我们的 LSBG 样本对于较低的恒星质量具有较低的金属丰度，与正常星系类似。根据 z 波段光度估计的恒星质量与突出的螺旋星系的质量相当。在气体质量分数与金属丰度的图中，我们的 LSBG 样品通常与高气体质量分数空间中的其他样品一致。此外，我们还研究了三个LSBG的星族，它们具有相对可靠的光谱连续体和较高的信噪比，并定性地得出结论，它们可能缺乏年龄<1 Gyr的恒星，而不是以年龄>1 Gyr的星族为主。关于我们样品的化学演化，LSBG 数据似乎允许高达 30% 的金属损失，但我们不能完全排除闭箱模型。此外，我们发现证据表明，我们的星系保留的金属量是矮星系的三倍左右，这与金属保留量与星系质量相关是一致的。总之，我们的数据支持这样的观点，即 LSBG 可能只是不断延伸到表面亮度低端的正常盘状星系。
We present long-slit optical spectra of 12 edge-on low surface brightness galaxies (LSBGs) positioned along their major axes. After performing reddening corrections for the emission-line fluxes measured from the extracted integrated spectra, we measured the gas-phase metallicities of our LSBG sample using both the [N ii]/Hα and the R23 diagnostics. Both sets of oxygen abundances show good agreement with each other, giving a median value of 12 + log(O/H) = 8.26 dex. In the luminosity–metallicity plot, our LSBG sample is consistent with the behavior of normal galaxies. In the mass–metallicity diagram, our LSBG sample has lower metallicities for lower stellar mass, similar to normal galaxies. The stellar masses estimated from z-band luminosities are comparable to those of prominent spirals. In a plot of the gas mass fraction versus metallicity, our LSBG sample generally agrees with other samples in the high gas mass fraction space. Additionally, we have studied stellar populations of three LSBGs, which have relatively reliable spectral continua and high signal-to-noise ratios, and qualitatively conclude that they have a potential dearth of stars with ages <1 Gyr instead of being dominated by stellar populations with ages >1 Gyr. Regarding the chemical evolution of our sample, the LSBG data appear to allow for up to 30% metal loss, but we cannot completely rule out the closed-box model. Additionally, we find evidence that our galaxies retain up to about three times as much of their metals compared with dwarfs, consistent with metal retention being related to galaxy mass. In conclusion, our data support the view that LSBGs are probably just normal disk galaxies continuously extending to the low end of surface brightness.
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DOI：
10.1088/0004-637x/728/2/74
发表时间：
2010-07
期刊：
The Astrophysical Journal
影响因子：
--
作者：
G. Galaz;R. Herrera-Camus;D. Garcia-Lambas;N. Padilla
通讯作者：
G. Galaz;R. Herrera-Camus;D. Garcia-Lambas;N. Padilla
DOI：
10.1088/0004-637x/693/2/1300
发表时间：
2008-12
期刊：
The Astrophysical Journal
影响因子：
--
作者：
M. Das;C. Reynolds;Stuart N. Vogel;S. McGaugh;N. Kantharia
通讯作者：
M. Das;C. Reynolds;Stuart N. Vogel;S. McGaugh;N. Kantharia
DOI：
10.1111/j.1365-2966.2012.20938.x
发表时间：
2012-03
影响因子：
4.8
作者：
L. Morelli;E. Corsini;A. Pizzella;E. Bontà;L. Coccato;J. M'endez-Abreu;M. M. D. D. Astronomia-M.-M.-D.-D.-Astronomia-102561505;U. Padova;I. Padova;E. Observatory;Instituto de Astrof'isica de Canarias-Instituto-de-Astrof'isica-de-Canarias-102997450
通讯作者：
L. Morelli;E. Corsini;A. Pizzella;E. Bontà;L. Coccato;J. M'endez-Abreu;M. M. D. D. Astronomia-M.-M.-D.-D.-Astronomia-102561505;U. Padova;I. Padova;E. Observatory;Instituto de Astrof'isica de Canarias-Instituto-de-Astrof'isica-de-Canarias-102997450
DOI：
10.1111/j.1365-2966.2004.07697.x
发表时间：
2004-01
影响因子：
4.8
作者：
F. Lamareille;M. Mouhcine;T. Contini;Ian Lewis;Stephen J. Maddox
通讯作者：
F. Lamareille;M. Mouhcine;T. Contini;Ian Lewis;Stephen J. Maddox
DOI：
10.1086/304100
发表时间：
1996-12
期刊：
The Astrophysical Journal
影响因子：
--
作者：
S. McGaugh;W. J. Blok
通讯作者：
S. McGaugh;W. J. Blok