Galaxy And Mass Assembly (GAMA): ugrizYJHK Sérsic luminosity functions and the cosmic spectral energy distribution by Hubble type
Galaxy And Mass Assembly (GAMA): ugrizYJHK Sérsic luminosity functions and the cosmic spectral energy distribution by Hubble type
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星系和质量组装 (GAMA):ugrizYJHK Sérsic 光度函数和哈勃类型的宇宙光谱能量分布
DOI:
10.1093/mnras/stt2391
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发表时间:
2014
影响因子:
4.8
通讯作者:
Kelvin L
中科院分区:
文献类型:
--
作者:
Kelvin L
We report the morphological classification of 3727 galaxies from the Galaxy and Mass Assembly survey withMr< −17.4 mag and in the redshift range 0.025 <z< 0.06 (2.1 × 105Mpc3) into E, S0-Sa, SB0-SBa, Sab-Scd, SBab-SBcd, Sd-Irr and little blue spheroid classes. Approximately 70 per cent of galaxies in our sample are disc-dominated systems, with the remaining ∼30 per cent spheroid dominated. We establish the robustness of our classifications, and use them to derive morphological-type luminosity functions and luminosity densities in theugrizYJHKpassbands, improving on prior studies that split by global colour or light profile shape alone. We find that the total galaxy luminosity function is best described by a double-Schechter function while the constituent morphological-type luminosity functions are well described by a single-Schechter function. These data are also used to derive the star formation rate densities for each Hubble class, and the attenuated and unattenuated (corrected for dust) cosmic spectral energy distributions, i.e. the instantaneous energy production budget. While the observed optical/near-IR energy budget is dominated 58:42 by galaxies with a significant spheroidal component, the actual energy production rate is reversed, i.e. the combined disc-dominated populations generate ∼1.3 times as much energy as the spheroid-dominated populations. On the grandest scale, this implies that chemical evolution in the local Universe is currently largely confined to mid-type spiral classes like our Milky Way.
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DOI:
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发表时间:
1940
影响因子:
11.1
作者:
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通讯作者:
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DOI:
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发表时间:
2012
期刊:
Proceedings of the International Astronomical Union
影响因子:
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10.1111/j.1365-2966.2010.16374.x
发表时间:
2010
影响因子:
4.8
作者:
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2007
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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2002
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