2018ApJ...856L...5F -
Astrophys. J., 856, L5-L5 (2018/March-3)
ALMA detections of CO emission in the most luminous, heavily dust-obscured quasars at z > 3.
FAN L., KNUDSEN K.K., FOGASY J. and DROUART G.
Abstract (from CDS):
We report the results of a pilot study of CO(4 - 3) emission line of three Wide-field Infrared Survey Explorer (WISE)-selected hyper-luminous, dust-obscured quasars (QSOs) with sensitive ALMA Band 3 observations. These obscured QSOs with Lbol > 1014 L☉ are among the most luminous objects in the universe. All three QSO hosts are clearly detected both in continuum and in CO(4 - 3) emission line. Based on CO(4 - 3) emission line detection, we derive the molecular gas masses (∼1010–11 M☉), suggesting that these QSOs are gas-rich systems. We find that the obscured QSOs in our sample follow the similar LCO^′^–LFIR relation as unobscured QSOs at high redshifts. We also find the complex velocity structures of CO(4 - 3) emission line, which provide the possible evidence for a gas-rich merger in W0149+2350 and possible molecular outflow in W0220+0137 and W0410-0913. Massive molecular outflow can blow away the obscured interstellar medium and make obscured QSOs evolve toward the UV/optical bright, unobscured phase. Our result is consistent with the popular active galactic nucleus (AGN) feedback scenario involving the co-evolution between the supermassive black holes and host galaxy.
Abstract Copyright:
© 2018. The American Astronomical Society. All rights reserved.
Journal keyword(s):
galaxies: active - galaxies: evolution - galaxies: high-redshift - galaxies: interactions - quasars: general
Simbad objects:
11
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