文章基本信息

标题：The OTELO survey
其他标题：II. The faint-end of the Hαluminosity function atz∼ 0.40
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作者：Marina Ramón-Pérez ; Ángel Bongiovanni ; Ana María Pérez García 等
期刊名称：Astronomy & Astrophysics
印刷版ISSN：0004-6361
电子版ISSN：1432-0746
出版年度：2019
卷号：631
页码：1-7
DOI：10.1051/0004-6361/201833295
语种：English
出版社：EDP Sciences
摘要：Aims. We take advantage of the capability of the OTELO survey to obtain the Hαluminosity function (LF) at z ∼ 0.40. Because of the deepest coverage of OTELO, we are able to determine the faint end of the LF, and thus better constrain the star formation rate and the number of galaxies at low luminosities. The AGN contribution to this LF is estimated as well.Methods. We make use of the multiwavelength catalogue of objects in the field compiled by the OTELO survey, which is unique in terms of minimum flux and equivalent width. We also take advantage of the pseudo-spectra built for each source, which allow the identification of emission lines and the discrimination of different types of objects.Results. The Hαluminosity function atz ∼ 0.40 is obtained, which extends the current faint end by almost 1 dex, reaching minimal luminosities of log10Llim = 38.5 erg s−1(or ∼0.002 M⊙yr−1). The AGN contribution to the total Hαluminosity is estimated. We find that no AGN should be expected below a luminosity of log10L = 38.6 erg s−1. From the sample of non-AGN (presumably, pure SFG) atz ∼ 0.40 we estimated a star formation rate density ofρSFR = 0.012 ± 0.005M⊙ yr−1 Mpc−3.
关键词：ensurveysgalaxies: star formationgalaxies: activegalaxies: luminosity functionmass function