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Discovery of Metastable He I* λ10830 Mini-broad Absorption Lines and Very Narrow Paschen α Emission Lines in the ULIRG Quasar IRAS F11119+3257
Pan, Xiang1; Zhou, Hongyan1,2; Liu WJ(刘文娟)3; Liu, Bo1,2; Ji, Tuo1; Shi ,Xiheng1; Zhang, Shaohua1; Jiang, Peng1; Wang, Huiyuan2; Hao, Lei4
发表期刊The Astrophysical Journal
2019-10-01
卷号883期号:2
DOI10.3847/1538-4357/ab40b5
产权排序第3完成单位
收录类别SCI
关键词galaxies: evolution galaxies: individual (IRAS F11119+3257) quasars: absorption lines quasars: emission lines
摘要

IRAS F11119+3257 is a quasar-dominated ultraluminous infrared galaxy, with a partially obscured narrow-line Seyfert 1 nucleus. In this paper, we present the near-IR (NIR) spectroscopy of F11119+3257, in which we find unusual Paschen emission lines and metastable He i* λ10830 absorption associated with the previously reported atomic sodium and molecular OH mini-BAL (broad absorption line) outflow. Photoionization diagnosis confirms previous findings that the outflows are at kiloparsec scales. Such large-scale outflows should produce emission lines. We indeed find that high-ionization emission lines ([O III], [Ne III], and [Ne V]) are dominated by blueshifted components at similar speeds to the mini-BALs. The blueshifted components are also detected in some low-ionization emission lines, such as [O II] λ3727 and some Balmer lines (Hα, Hβ, and Hγ), even though their cores are dominated by narrow (FWHMNEL = 570 ± 40  km s−1) or broad components at the systemic redshift of z = 0.18966 ± 0.00006. The mass flow rate (230–730 M yr−1) and the kinetic luminosity (${\dot{E}}_{k}\sim {10}^{43.6-44.8}$ erg s−1) are then inferred jointly from the blueshifted emission and absorption lines. In the NIR spectrum of F11119+3257, we also find that the Paschen emission lines are unique, in which a very narrow (FWHM = 260 ± 20  km s−1) component is shown in only Paα. This narrow component most probably comes from heavily obscured star formation. Based on the Paα and Paβ emissions, we obtain an extinction at the H band, A H > 2.1 (or a reddenning of ${E}_{B-V}$ > 3.7), and a star formation rate of SFR > 130 M yr−1 that resembles the estimates inferred from the far-IR emissions (SFRFIR = 190 ± 90 M yr−1).

语种英语
学科领域天文学 ; 星系与宇宙学 ; 星系形成与演化
学科门类理学 ; 理学::天文学
出版者The American Astronomical Society
ISSN0004-637X
URL查看原文
WOS记录号IOP:0004-637X-883-2-ab40b5
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文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/21427
专题自由探索组
通讯作者Zhou, Hongyan
作者单位1.SOA Key Laboratory for Polar Science, Polar Research Institute of China, 451 Jinqiao Road, Shanghai, 200136, People's Republic of China
2.Key Laboratory for Researches in Galaxies and Cosmology, Department of Astronomy, University of Sciences and Technology of China, Chinese Academy of Sciences, Hefei, Anhui, 230026, People's Republic of China
3.Yunnan Observatories, Chinese Academy of Sciences, Kunming, Yunnan 650011, People's Republic of China
4.Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai 200030, People's Republic of China
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Pan, Xiang,Zhou, Hongyan,Liu WJ,et al. Discovery of Metastable He I* λ10830 Mini-broad Absorption Lines and Very Narrow Paschen α Emission Lines in the ULIRG Quasar IRAS F11119+3257[J]. The Astrophysical Journal,2019,883(2).
APA Pan, Xiang.,Zhou, Hongyan.,Liu WJ.,Liu, Bo.,Ji, Tuo.,...&Hao, Lei.(2019).Discovery of Metastable He I* λ10830 Mini-broad Absorption Lines and Very Narrow Paschen α Emission Lines in the ULIRG Quasar IRAS F11119+3257.The Astrophysical Journal,883(2).
MLA Pan, Xiang,et al."Discovery of Metastable He I* λ10830 Mini-broad Absorption Lines and Very Narrow Paschen α Emission Lines in the ULIRG Quasar IRAS F11119+3257".The Astrophysical Journal 883.2(2019).
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