New CO detections of lensed submillimetre galaxies in A2218: probing molecular gas in the LIRG regime at high redshift
New CO detections of lensed submillimetre galaxies in A2218: probing molecular gas in the LIRG regime at high redshift
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A2218 中透镜亚毫米星系的新 CO 探测：在高红移下探测 LIRG 区域中的分子气体
DOI：
10.1051/0004-6361:200810876
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发表时间：
2009
影响因子：
6.5
通讯作者：
Knudsen
中科院分区：
文献类型：
--
作者：
Knudsen
背景亚毫米星系(SMG)是遥远的尘埃星系，正在以惊人的速度形成恒星。最近，在理解明亮的SMG(即mJy)的性质方面取得了重大进展。较暗的SMG的样本很小，目前正处于鉴定研究的建立阶段。目的我们研究了SMMJ163555和SMMJ163541这两个SMG在红移和未透镜亚毫米通量分别为0.4mJy和6.0mJy时的分子气体含量。这两个SMG都被前景星团Abell-2218引力透镜。方法我们使用IRAM Platform de Bure干涉仪在SMMJ163555的CO(2-1)线和SMMJ163541的CO(3-2)线的3 mm处获得观测结果。结果在红移1.0313处探测到SMMJ163555的CO(2-1)谱线，积分谱线强度为 S-1，谱线宽度为 S-1。由此推算出 的气体质量，并估算出恒星形成效率为440 /。在红移3.1824处检测到了SMMJ163541的CO(3-2)谱线，在红移3.1883处可能有第二个分量，其积分谱线强度为1Jy KM S-1，线宽为 S-1。由此推算出 的气体质量，并估计恒星形成效率为1,000 /。对于SMMJ163556，在灵敏度为0.15 Jy Km S-1的红移范围内没有检测到CO(4-3)。结论共线观测证实了SMMJ163555和SMMJ163541的光学红移。两个星系的共线光度都符合这一关系。SMMJ163555在所有已知红移的SMG中具有最低的远红外光度，是少数几个其性质可以在ALMA之前估计的高红移LIRG之一。
ContextSubmillimetre galaxies (SMGs) are distant, dusty galaxies undergoing star formation at prodigious rates. Recently there has been major progress in understanding the nature of the bright SMGs (i.e. mJy). The samples for the fainter SMGs are small and are currently in a phase of being built up through identification studies.AimsWe study the molecular gas content in the two SMGs, SMMJ163555 and SMMJ163541, at redshifts and with unlensed submillimetre fluxes of 0.4 mJy and 6.0 mJy. Both SMGs are gravitationally lensed by the foreground cluster Abell 2218.MethodsWe used the IRAM Plateau de Bure Interferometer to obtain observations at 3 mm of the lines CO(2–1) for SMMJ163555 and CO(3–2) for SMMJ163541. Additionally, we obtained CO(4–3) observations for the candidate SMMJ163556 with an unlensed submillimetre flux of 2.7 mJy.ResultsThe CO(2–1) line was detected for SMMJ163555 at redshift 1.0313 with an integrated line intensity of Jy km s-1and a line width of km s-1. From this a gas mass of is derived and a star formation efficiency of 440 / estimated. The CO(3–2) line was detected for SMMJ163541 at redshift 3.1824, possibly with a second component at redshift 3.1883, with an integrated line intensity of Jy km s-1and a line width of km s-1. From this a gas mass of is derived and a star formation efficiency of 1000 / is estimated. For SMMJ163556, the CO(4–3) is undetected within the redshift range down to a sensitivity of 0.15 Jy km s-1.ConclusionsOur CO-line observations confirm the optical redshifts for SMMJ163555 and SMMJ163541. The CO-line luminosity for both galaxies is consistent with the relation. SMMJ163555 has the lowest far-infrared luminosity of all SMGs with a known redshift and is one of the few high-redshift LIRGs whose properties can be estimated prior to ALMA.
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红移为 2.5 的三叶草类星体发出极强的一氧化碳
影响因子：
64.8
作者：
R. Barvainis;L. Tacconi;R. Antonucci;D. Alloin;P. Coleman
通讯作者：
P. Coleman
DOI：
10.1111/j.1365-2966.2008.13553.x
发表时间：
2008-06
影响因子：
4.8
作者：
K. Coppin;M. Swinbank;R. Neri;P. Cox;D. Alexander;I. Smail;M. Page;J. Stevens;K. Knudsen;R. Ivison;A. Beelen;F. Bertoldi;A. Cosmology;D. University;Iram;D. Physics;Mssl;University College London;CfAR;U. Hertfordshire;AIfA;U. Bonn;Ifa;U. Edinburgh;UK-ATC;Ias;U. Paris-sud;Iap;Universit'e PierreMarie Curie
通讯作者：
K. Coppin;M. Swinbank;R. Neri;P. Cox;D. Alexander;I. Smail;M. Page;J. Stevens;K. Knudsen;R. Ivison;A. Beelen;F. Bertoldi;A. Cosmology;D. University;Iram;D. Physics;Mssl;University College London;CfAR;U. Hertfordshire;AIfA;U. Bonn;Ifa;U. Edinburgh;UK-ATC;Ias;U. Paris-sud;Iap;Universit'e PierreMarie Curie
DOI：
10.1086/511151
发表时间：
2006-11
期刊：
The Astrophysical Journal
影响因子：
--
作者：
N. Nesvadba;M. Lehnert;R. Genzel;F. Eisenhauer;A. Baker;S. Seitz;R. Davies;D. Lutz;L. Tacconi;M. Tecza;R. Bender;R. Abuter
通讯作者：
N. Nesvadba;M. Lehnert;R. Genzel;F. Eisenhauer;A. Baker;S. Seitz;R. Davies;D. Lutz;L. Tacconi;M. Tecza;R. Bender;R. Abuter
DOI：
10.1086/379968
发表时间：
2003-10
期刊：
The Astrophysical Journal Letters
影响因子：
--
作者：
R. Neri;R. Genzel;R. Ivison;F. Bertoldi;A. Blain;S. Chapman;P. Cox;T. Greve;A. Omont;D. Frayer
通讯作者：
R. Neri;R. Genzel;R. Ivison;F. Bertoldi;A. Blain;S. Chapman;P. Cox;T. Greve;A. Omont;D. Frayer
超深亚毫米地图：通过透镜和强大的源提取，低于水肺混淆极限
DOI：
10.1111/j.1365-2966.2006.10138.x
发表时间：
2006
影响因子：
4.8
作者：
K. Knudsen;V. Barnard;P. Werf;P. Vielva;J. Kneib;A. Blain;R. B. Barreiro;R. Ivison;I. Smail;J. A. Peacock
通讯作者：
J. A. Peacock