Polycyclic aromatic hydrocarbon feature deficit of starburst galaxies in the AKARI North Ecliptic Pole Deep field

Polycyclic aromatic hydrocarbon feature deficit of starburst galaxies in the AKARI North Ecliptic Pole Deep field
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AKARI 北黄道极深场星暴星系的多环芳烃特征缺失

DOI:
10.1051/0004-6361/201423744
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发表时间:
2014
影响因子:
6.5
通讯作者:
Miyaji,T.
Miyaji,T.
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Murata;K.; Matsuhara;H.; Inami;H.; Wada;T.; Goto;T.; Armus;L.; Pearson;C.; Serjeant;S.;;Miyaji,T.

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利用AKARI北极深巡天修订星表中的1868个样品,研究了星系中多环芳烃(PAH)的发射行为。在2-24μm范围内的连续滤光片覆盖使得测量8μm的光度成为可能,这是由PAH发射主导的,直到z = 2。我们比较了IR_8(λ LIR/L(8))和8μm与4.5μm光度比(λ L(8)/λ L(4.5))与恒星爆发度(RSB)的关系。所有的活动星系核候选者被排除在我们的样本使用光谱能量分布拟合。当logRSB< 0.5时,νL(8)/νL(4.5)随爆发强度的增加而增加,当爆发强度较高时,νL(8)/νL(4.5)保持不变。另一方面,IR 8在logRSB< 0时是恒定的,而在logRSB> 0时它随着星爆性而增加。这种行为在我们研究的所有红移范围内都可以看到。这些结果表明,星暴星系有不足的PAH排放相比,主序星星系。我们还发现具有极高的νL(8)/νL(4.5)比值的星系只有中等的恒星爆发性。这些结果表明,星暴星系具有紧凑的恒星形成区域,具有强烈的辐射,这会破坏多环芳烃,和/或具有尘埃HII区域,导致缺乏电离光子。
We study the behaviour of polycyclic aromatic hydrocarbon (PAH) emission in galaxies atz= 0.3–1.4 using 1868 samples from the revised catalogue of AKARI North Ecliptic Pole Deep survey. The continuous filter coverage at 2–24μm makes it possible to measure 8μm luminosity, which is dominated by PAH emission, for galaxies at up toz= 2. We compare the IR8 (≡LIR/L(8)) and 8μm to 4.5μm luminosity ratio (νL(8) /νL(4.5)) with the starburstiness,RSB, defined as excess of specific star-formation rate over that of main-sequence galaxy. All AGN candidates were excluded from our sample using a spectral energy distribution fitting. We findνL(8) /νL(4.5) increases with starburstiness at logRSB< 0.5 and stays constant at higher starburstiness. On the other hand, IR8 is constant at logRSB< 0, while it increases with starburstiness at logRSB> 0. This behaviour is seen in all redshift range of our study. These results indicate that starburst galaxies have deficient PAH emission compared with main-sequence galaxies. We also find that galaxies with extremely highνL(8) /νL(4.5) ratio have only moderate starburstiness. These results suggest that starburst galaxies have compact star-forming regions with intense radiation, which destroys PAHs, and/or have dusty HII regions resulting in a lack of ionising photons.
使用 AKARI (ASTRO-F) 围绕黄道极进行深河外巡天
DOI: --
发表时间: 2006
期刊: Publ.Astro.Soc.Japan 58(in press)
影响因子: --
作者:
Hideo MATSUHARA;et al.;Hitoshi HANAMI;Toshinobu TAKAGI et al.;Hideo Matsuhara
通讯作者: Hideo Matsuhara
DOI: 10.1093/pasj/64.4.70
发表时间: 2011-12
影响因子: 2.3
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H. Hanami;T. Ishigaki;N. Fujishiro;Kouichiro Nakanishi;T. Miyaji;M. Krumpe;K. Umetsu;Y. Ohyama;H. Shim;M. Im;Hyoung Mok Lee;Myung Gyoon Lee;S. Serjeant;G. White;C. Willmer;T. Goto;S. Oyabu;T. Takagi;T. Wada;H. Matsuhara
通讯作者: H. Hanami;T. Ishigaki;N. Fujishiro;Kouichiro Nakanishi;T. Miyaji;M. Krumpe;K. Umetsu;Y. Ohyama;H. Shim;M. Im;Hyoung Mok Lee;Myung Gyoon Lee;S. Serjeant;G. White;C. Willmer;T. Goto;S. Oyabu;T. Takagi;T. Wada;H. Matsuhara
DOI: 10.1088/0004-637x/774/1/68
发表时间: 2013-09-01
影响因子: 4.9
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Diaz-Santos, T.;Armus, L.;Sturm, E.
通讯作者: Sturm, E.
AKARI/IRC 北黄道地区深度调查
DOI: --
发表时间: 2008
期刊: Publication of Astronomical Society of Japan 60
影响因子: --
作者:
T. Wada;et al.
通讯作者: et al.
DOI: 10.1088/2041-8205/754/1/l14
发表时间: 2012-06
期刊: The Astrophysical Journal Letters
影响因子: --
作者:
F. Salmi;E. Daddi;D. Elbaz;M. Sargent;M. Dickinson;A. Renzini;M. Béthermin;D. Le Borgne
通讯作者: F. Salmi;E. Daddi;D. Elbaz;M. Sargent;M. Dickinson;A. Renzini;M. Béthermin;D. Le Borgne