A LABOCA SURVEY OF THE EXTENDED CHANDRA DEEP FIELD SOUTH—SUBMILLIMETER PROPERTIES OF NEAR-INFRARED SELECTED GALAXIES
A LABOCA SURVEY OF THE EXTENDED CHANDRA DEEP FIELD SOUTH—SUBMILLIMETER PROPERTIES OF NEAR-INFRARED SELECTED GALAXIES
复制标题
近红外选定星系的扩展钱德拉深场南亚毫米级特性的拉博卡调查
DOI：
10.1088/0004-637x/719/1/483
复制
发表时间：
2010
期刊：
影响因子：
--
通讯作者：
中科院分区：
文献类型：
--
作者：
利用阿塔卡马探路者实验（APEX）上的大顶BOlometer CAmera（LABOCA）获得的330小时ESO-MPG 870 μm扩展Chandra深场南（ECDF-S）观测资料，对选取的8266个近红外（near-IR）样品进行了亚毫米（submm）波长的叠加分析。（K vega）20个星系，包括893个BzK星系，1253个极红天体（ERO）和737个遥远的红星系（DRG），选自耶鲁大学-智利大学多波长巡天（MUSYC）。我们测量的平均870 μm通量为0.22±0.01 mJy（22.0 σ），0.48±0.04 mJy（12.0 σ），0.39±0.03 mJy（13.0 σ），和0.43±0.04 mJy（10.8 σ）的K vega 20，BzK，ERO，和DRG样品分别。对于BzK，ERO和DRG子样本，它们在某种程度上重叠，并且可能在z = 1-2，这意味着平均远红外光度为100（1-5）× 10 11 L，星星形成率（SFR）为100 - 20 M。将BzK星系分为恒星形成星系（sBzK）和被动星系（pBzK），前者被显著检测到（0.50±0.04 mJy，12.5 σ），而后者仅被边缘检测到（0.34±0.10 mJy，3.4 σ），从而证实sBzK和pBzK标准在某种程度上分别选择了遮蔽星系、恒星形成星系和真正的被动星系。织女星K-20星系对870 μm河外背景光的贡献为7.27±0.34 Jy deg− 2（16.5%±5.7%）。sBzK和pBzK星系对EBL的贡献分别为1.49±0.22 Jy deg− 2（3.4%±1.3%）和0.20±0.14 Jy deg− 2（0.5%±0.3%）。我们提出了第一次描绘的平均submm信号从K织女星20个选定的星系和他们的贡献submm EBL作为（光度）红移的函数，并找到一个下降的平均submm信号（因此，红外光度和SFR）的一个因素，从z 2到z 0。这与宇宙星星形成的历史相一致，其中星系中的星星形成活动在z = 1处显著增加。在24 μm光通量为350 μJy（对应于z = 1.5× 1012 L）的Kvega-20星系中，发现24 μm光通量与870 μm光通量之间存在线性相关，而在更高的24 μm光通量下则没有相关性。这一现象表明，星星的形成，而不是活动星系核（AGN），一般负责大部分的中红外发射的LIR-1.5× 1012 L的反射系统，而在更明亮的系统中，AGN作出了显着的贡献，24 μm的发射。通过绘制叠加的870 μm信号在B− z与z− K图上的分布，我们已经证实了sBzK选择标准选择z> 1的恒星形成星系的能力，尽管我们的分析表明，sBzK星系的子集也是ERO，它们负责整个sBzK种群中超过80%的亚毫米辐射。
Using the 330 hr ESO-MPG 870 μm survey of the Extended Chandra Deep Field South (ECDF-S) obtained with the Large Apex BOlometer CAmera (LABOCA) on the Atacama Pathfinder EXperiment (APEX), we have carried out a stacking analysis at submillimeter (submm) wavelengths of a sample of 8266 near-infra-red (near-IR) selected (K vega⩽ 20) galaxies, including 893 BzK galaxies, 1253 extremely red objects (EROs), and 737 distant red galaxies (DRGs), selected from the Multi-wavelength Survey by Yale-Chile (MUSYC). We measure average 870 μm fluxes of 0.22±0.01 mJy (22.0 σ), 0.48±0.04 mJy (12.0 σ), 0.39±0.03 mJy (13.0 σ), and 0.43±0.04 mJy (10.8 σ) for the K vega⩽ 20, BzK, ERO, and DRG samples, respectively. For the BzK, ERO, and DRG sub-samples, which overlap to some degree and are likely to be at z≃ 1–2, this implies an average far-IR luminosity of∼(1–5)× 10 11 L☉ and star formation rate (SFR) of∼ 20–90 M☉. Splitting the BzK galaxies into star-forming (sBzK) and passive (pBzK) galaxies, the former is significantly detected (0.50±0.04 mJy, 12.5 σ) while the latter is only marginally detected (0.34±0.10 mJy, 3.4 σ), thus confirming that the sBzK and pBzK criteria to some extent select obscured, star-forming, and truly passive galaxies, respectively. The K vega⩽ 20 galaxies are found to contribute 7.27±0.34 Jy deg− 2 (16.5%±5.7%) to the 870 μm extragalactic background light (EBL). sBzK and pBzK galaxies contribute 1.49±0.22 Jy deg− 2 (3.4%±1.3%) and 0.20±0.14 Jy deg− 2 (0.5%±0.3%) to the EBL. We present the first delineation of the average submm signal from the K vega⩽ 20 selected galaxies and their contribution to the submm EBL as a function of (photometric) redshift, and find a decline in the average submm signal (and therefore IR luminosity and SFR) by a factor∼ 2–3 from z∼ 2 to z∼ 0. This is in line with a cosmic star formation history in which the star formation activity in galaxies increases significantly at z≳ 1. A linear correlation between the average 24 μm and 870 μm flux densities is found for the K vega⩽ 20 galaxies with 24 μm fluxes≲ 350 μJy (corresponding to L IR≃ 1.5× 10 12 L☉ at z≃ 2), while at higher 24 μm fluxes there is no correlation. This behavior suggests that star formation, and not active galactic nuclei (AGNs), is in general responsible for the bulk of the mid-IR emission of L IR≲ 1.5× 10 12 L☉ systems, while in more luminous systems the AGN makes a significant contribution to the 24 μm emission. By mapping the stacked 870 μm signal across the B− z versus z− K diagram we have confirmed the ability of the sBzK selection criterion to select star-forming galaxies at z> 1, although our analysis suggests that the subset of sBzK galaxies which are also EROs are responsible for> 80% of the submm emission from the entire sBzK population.
登录
查看更多内容
DOI：
10.1086/520511
发表时间：
2007-09
期刊：
The Astrophysical Journal Supplement Series
影响因子：
--
作者：
F. Bertoldi;C. Carilli;M. Aravena;E. Schinnerer;H. Voss;V. Smolčić;K. Jahnke;N. Scoville;A. Blain;K. Menten;D. Lutz;M. Brusa;Y. Taniguchi;P. Capak;B. Mobasher;S. Lilly;D. Thompson;H. Aussel;E. Kreysa;G. Hasinger;James E. Aguirre;J. Schlaerth;A. Koekemoer
通讯作者：
F. Bertoldi;C. Carilli;M. Aravena;E. Schinnerer;H. Voss;V. Smolčić;K. Jahnke;N. Scoville;A. Blain;K. Menten;D. Lutz;M. Brusa;Y. Taniguchi;P. Capak;B. Mobasher;S. Lilly;D. Thompson;H. Aussel;E. Kreysa;G. Hasinger;James E. Aguirre;J. Schlaerth;A. Koekemoer
LBG、DRG 和 BzK 星系之间的比较：它们对 GOODS-MUSIC 样本中恒星质量密度的贡献
DOI：
--
发表时间：
2007
期刊：
影响因子：
--
作者：
A. Roma;Monteporzio;I. O. A. D. Trieste;Trieste;Italy.
通讯作者：
Italy.
Z > 2 个射电星系的红外成像
DOI：
10.1086/170991
发表时间：
1992
期刊：
The Astrophysical Journal
影响因子：
--
作者：
P. McCarthy;S. E. Persson;S. West
通讯作者：
S. West
DOI：
10.1111/j.1365-2966.2007.12302.x
发表时间：
2007-08
影响因子：
4.8
作者：
T. Takagi;A. Mortier;K. Shimasaku;K. Coppin;A. Pope;R. Ivison;H. Hanami;S. Serjeant;D. Clements;R. Priddey;J. Dunlop;T. Takata;I. Aretxaga;S. Chapman;S. Eales;D. Farrah;G. Granato;M. Halpern;D. Hughes;E. V. Kampen;D. Scott;K. Sekiguchi;I. Smail;Mattia Vaccari
通讯作者：
T. Takagi;A. Mortier;K. Shimasaku;K. Coppin;A. Pope;R. Ivison;H. Hanami;S. Serjeant;D. Clements;R. Priddey;J. Dunlop;T. Takata;I. Aretxaga;S. Chapman;S. Eales;D. Farrah;G. Granato;M. Halpern;D. Hughes;E. V. Kampen;D. Scott;K. Sekiguchi;I. Smail;Mattia Vaccari
影响因子：
6.5
作者：
A. Grazian;S. Salimbeni;L. Pentericci;A. Fontana;M. Nonino;E. Vanzella;S. Cristiani;C. Santis;S. Gallozzi;E. Giallongo;P. Santini
通讯作者：
A. Grazian;S. Salimbeni;L. Pentericci;A. Fontana;M. Nonino;E. Vanzella;S. Cristiani;C. Santis;S. Gallozzi;E. Giallongo;P. Santini