Imperial College London
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Dr Clements

Faculty of Natural Sciences, Department of Physics

Reader in Astrophysics
 
 
 
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Contact

 

+44 (0)20 7594 7693d.clements

 
 
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Location

 

1011Blackett LaboratorySouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Marques-Chaves:2018:1538-4357/aaabb7,
author = {Marques-Chaves, R and Perez-Fournon, I and Gavazzi, R and Martinez-Navajas, PI and Riechers, D and Rigopoulou, D and Cabrera-Lavers, A and Clements, DL and Cooray, A and Farrah, D and Ivison, RJ and Jimenez-Angel, CE and Nayyeri, H and Oliver, S and Omont, A and Scott, D and Shu, Y and Wardlow, J},
doi = {1538-4357/aaabb7},
journal = {Astrophysical Journal},
title = {The strong gravitationally lensed Herschel galaxy HLock01: optical spectroscopy reveals a close galaxy merger with evidence of inflowing gas},
url = {http://dx.doi.org/10.3847/1538-4357/aaabb7},
volume = {854},
year = {2018}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - The submillimeter galaxy (SMG) HERMES J105751.1+573027 (hereafter HLock01) at z = 2.9574 ± 0.0001 is one of the brightest gravitationally lensed sources discovered in the Herschel Multi-tiered Extragalactic Survey. Apart from the high flux densities in the far-infrared, it is also extremely bright in the rest-frame ultraviolet (UV), with a total apparent magnitude m UV sime 19.7 mag. We report here deep spectroscopic observations with the Gran Telescopio Canarias of the optically bright lensed images of HLock01. Our results suggest that HLock01 is a merger system composed of the Herschel-selected SMG and an optically bright Lyman break-like galaxy (LBG), separated by only 3.3 kpc in projection. While the SMG appears very massive (M  sime 5 × 1011 M ), with a highly extinguished stellar component (A V  sime 4.3 ), the LBG is a young, lower-mass (M  sime 1 × 1010 M ), but still luminous ($10\times {L}_{\mathrm{UV}}^{ }$) satellite galaxy. Detailed analysis of the high signal-to-noise ratio (S/N) rest-frame UV spectrum of the LBG shows complex kinematics of the gas, exhibiting both blueshifted and redshifted absorption components. While the blueshifted component is associated with strong galactic outflows from the massive stars in the LBG, as is common in most star-forming galaxies, the redshifted component may be associated with gas inflow seen along a favorable sightline to the LBG. We also find evidence of an extended gas reservoir around HLock01 at an impact parameter of 110 kpc, through the detection of C ii λλ1334 absorption in the red wing of a bright Lyα emitter at z sime 3.327. The data presented here highlight the power of gravitational lensing in high S/N studies to probe deeply into the physics of high-z star-forming galaxies.
AU  - Marques-Chaves,R
AU  - Perez-Fournon,I
AU  - Gavazzi,R
AU  - Martinez-Navajas,PI
AU  - Riechers,D
AU  - Rigopoulou,D
AU  - Cabrera-Lavers,A
AU  - Clements,DL
AU  - Cooray,A
AU  - Farrah,D
AU  - Ivison,RJ
AU  - Jimenez-Angel,CE
AU  - Nayyeri,H
AU  - Oliver,S
AU  - Omont,A
AU  - Scott,D
AU  - Shu,Y
AU  - Wardlow,J
DO  - 1538-4357/aaabb7
PY  - 2018///
SN  - 0004-637X
TI  - The strong gravitationally lensed Herschel galaxy HLock01: optical spectroscopy reveals a close galaxy merger with evidence of inflowing gas
T2  - Astrophysical Journal
UR  - http://dx.doi.org/10.3847/1538-4357/aaabb7
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000425770500016&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - http://hdl.handle.net/10044/1/60448
VL  - 854
ER  -
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