The Hα luminosity function and star formation rate up to z ∼ 1 ⋆
The Hα luminosity function and star formation rate up to z ∼ 1 ⋆
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Hα 光度函数和恒星形成率达到 z 〜 1 ⋆
DOI：
10.1046/j.1365-8711.2002.05919.x
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发表时间：
2001
影响因子：
4.8
通讯作者：
Eső
中科院分区：
文献类型：
--
作者：
L. Tresse;S. Maddox;O. Fèvre;J. B. L. D. D. Marseille;U. Nottingham;Eső
本文描述了ISAAC/ESO-VLT对加拿大-法国红移巡天（CFRS）的33个场星系的Ha λ 6563巴耳末线的观测结果，红移值在0.5~1.1之间。我们在30个星系中检测到了Ha的发射，并将该样品的性质与z = 0.2的CFRS星系的低红移样品进行了比较。我们发现，对于低红移和高红移的样品，Ha光度L（H α）与M（B A B）以同样的方式紧密相关。L（Ha）也与L（[O II] λ 3727）相关，并且在低红移和高红移下，这种关系似乎也是相似的。对于较亮的星系，L（[O II]）/L（H α）的比值平均降低2倍。从Ha光度函数导出，共动Ha光度密度从（z）= 0.2到（z）= 1.3增加了12倍。我们的结果证实了星星形成率（SFR）在z <1.3时的强烈上升，与（1 + z）4成正比。1 γ 0。3（H0 = 50 km s-1Mpc-1，q0 = 0.5）。我们发现平均SFR（2800 A）/SFR（H α）比为3.2使用Kennicutt SFR变换。这对应于灰尘校正，需要使近紫外线数据与红化校正的Ha数据内的自包含的，我选择的CFRS样本一致。
We describe ISAAC/ESO-VLT observations of the Ha λ6563 Balmer line of 33 field galaxies from the Canada-France Redshift Survey (CFRS) with redshifts selected between 0.5 and 1.1. We detect Ha in emission in 30 galaxies and compare the properties of this sample with the low-redshift sample of CFRS galaxies at z ∼0.2. We find that the Ha luminosity, L(Hα), is tightly correlated to M(B A B ) in the same way for both the low- and high-redshift samples. L(Ha) is also correlated to L([O II]λ3727), and again the relation appears to be similar at low and high redshifts. The ratio L([O II])/L(Hα) decreases for brighter galaxies by as much as a factor of 2 on average. Derived from the Ha luminosity function, the comoving Ha luminosity density increases by a factor 12 from (z) = 0.2 to (z) = 1.3. Our results confirm a strong rise of the star formation rate (SFR) at z < 1.3, proportional to (1 + z) 4 . 1 γ 0 . 3 (with H 0 = 50 km s - 1 Mpc - 1 , q 0 = 0.5). We find an average SFR(2800 A)/SFR(Hα) ratio of 3.2 using the Kennicutt SFR transformations. This corresponds to the dust correction that is required to make the near-ultraviolet data consistent with the reddening-corrected Ha data within the self-contained, I-selected CFRS sample.
DOI：
10.1086/305331
发表时间：
1997-09
期刊：
The Astrophysical Journal
影响因子：
--
作者：
L. Tresse;S. Maddox
通讯作者：
L. Tresse;S. Maddox