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首页> 外文期刊>PASJ: Publications of the Astronomical Society of Japan >Discovery of a strong ionized-gas outflow in an AKARI-selected ultra-luminous infrared galaxy at z=0.5
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Discovery of a strong ionized-gas outflow in an AKARI-selected ultra-luminous infrared galaxy at z=0.5

机译：在Z = 0.5的Akari-Selects的超发光红外星系中发现强的电离气体流出

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摘要

In order to construct a sample of ultra-luminous infrared galaxies (ULIRGs; with infrared luminosity L-IR > 10(12) L-circle dot) at 0.5 < z < 1, we are conducting an optical follow-up program for bright 90 mu m far-infrared sources with a faint optical (i < 20 mag) counterpart selected in the AKARI Far-Infrared Surveyor (FIS) Bright Source catalog (Ver.2). AKARI-FIS-V2 J0916248+073034, identified as a ULIRG at z = 0.49 in the spectroscopic follow-up observation, indicates signatures of an extremely strong outflow in its emission line profiles. Its [O III] 5007 angstrom emission line shows a full width at half-maximum (FWHM) of 1830 kms(-1) and velocity shift of -770 kms(-1) relative to the stellar absorption lines. Furthermore, the low-ionization [OII] 3726 angstrom 3729 angstrom doublet also shows a large FWHM of 910 kms(-1) and velocity shift of -380 kms(-1). After the removal of an unresolved nuclear component, the long-slit spectroscopy 2D image possibly shows that the outflow extends to a radius of 4 kpc. The mass outflow and energy ejection rates are estimated to be 500M(circle dot) yr(-1) and 4 x 10(44) erg s(-1), respectively, which imply that the outflow is among the most powerful ones observed in ULIRGs and quasi-stellar objects at 0.3 < z < 1.6. The co-existence of the strong outflow and intense star formation (star formation rate of 990 M-circle dot yr(-1)) indicates that the feedback of the strong outflow has not severely affected the star-forming region of the galaxy.
机译：为了构建超发光红外星系的样品（Ulirgs;用红外发光度L-IR> 10（12）L圆点），在0.5

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