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  1. OA@INAF
  2. PRODOTTI RICERCA INAF
  3. 1 CONTRIBUTI IN RIVISTE (Journal articles)
  4. 1.01 Articoli in rivista
Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/29674
Title: First Results from the KMOS Lens-Amplified Spectroscopic Survey (KLASS): Kinematics of Lensed Galaxies at Cosmic Noon
Authors: Mason, Charlotte A.
Treu, Tommaso
FONTANA, Adriano 
Jones, Tucker
Morishita, Takahiro
Amorin, Ricardo
Bradač, Maruša
Quinn Finney, Emily
GRILLO, CLAUDIO
Henry, Alaina
Hoag, Austin
Huang, Kuang-Han
Schmidt, Kasper B.
Trenti, Michele
Vulcani, Benedetta 
Issue Date: 2017
Journal: THE ASTROPHYSICAL JOURNAL 
Number: 838
Issue: 1
First Page: 14
Abstract: We present the first results of the K-band Multi-Object Spectrometer (KMOS) Lens-Amplified Spectroscopic Survey, a new ESO Very Large Telescope large program, doing multi-object integral field spectroscopy of galaxies gravitationally lensed behind seven galaxy clusters selected from the Hubble Space Telescope (HST) Grism Lens-Amplified Survey from Space. Using the power of the cluster magnification, we are able to reveal the kinematic structure of 25 galaxies at 0.7≲ z≲ 2.3, in four cluster fields, with stellar masses 7.8≲ {log}({M}<SUB>\star </SUB>/ {M}<SUB>☉ </SUB>)≲ 10.5. This sample includes five sources at z> 1 with lower stellar masses than in any previous kinematic integral field unit (IFU) surveys. Our sample displays a diversity in kinematic structure over this mass and redshift range. The majority of our kinematically resolved sample is rotationally supported, but with a lower ratio of rotational velocity to velocity dispersion than in the local universe, indicating the fraction of dynamically hot disks changes with cosmic time. We find that no galaxies with stellar mass < 3× {10}<SUP>9</SUP> {M}<SUB>☉ </SUB> in our sample display regular ordered rotation. Using the enhanced spatial resolution from lensing, we resolve a lower number of dispersion-dominated systems compared to field surveys, competitive with findings from surveys using adaptive optics. We find that the KMOS IFUs recover emission line flux from HST grism-selected objects more faithfully than slit spectrographs. With artificial slits, we estimate that slit spectrographs miss, on average, 60% of the total flux of emission lines, which decreases rapidly if the emission line is spatially offset from the continuum.
URI: http://hdl.handle.net/20.500.12386/29674
URL: https://iopscience.iop.org/article/10.3847/1538-4357/aa60c4
ISSN: 0004-637X
DOI: 10.3847/1538-4357/aa60c4
Bibcode ADS: 2017ApJ...838...14M
Fulltext: open
Appears in Collections:1.01 Articoli in rivista

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