Performance of the K-band multi-object spectrograph (KMOS) on the ESO VLT

Sharples, R. M.; Bender, Ralf; Berbel, Alex Agudo; Bennett, Richard J.; Bezawada, Naidu; Castillo, R.; Cirasuolo, M.; Clark, Paul; Davidson, George; Davies, Richard; Davies, Roger L.; Dubbeldam, Marc; Fairley, Alasdair; Finger, Gert; Schreiber, N. Förster; Genzel, R.; Haefner, R.; Hess, Achim; Jung, I.; Lewis, Ian; Montgomery, David; Murray, J. R.; Muschielok, B.; Pirard, Jeff; Ramsay, Suzanne; Rees, Philip; Richter, Josef; Robertson, David J.; Robson, Ian; Rolt, Stephen; Saglia, R.; Saviane, I.; Schlichter, Jörg; Schmidtobreik, Linda; Segovia, A.; Smette, A.; Tecza, Matthias; Todd, Stephen; Wegner, Michael; Wiezorrek, E.

doi:10.1117/12.2055496

Cited by 10 publications

(5 citation statements)

References 12 publications

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“…In this study, we present the spectra of more than 700 late-type stars located in an area >4 pc 2 of the Galactic Centre. The spectra were obtained with the integral-field spectrograph KMOS (Sharples et al 2013) in the near-infrared K band. We measure the stellar parameters effective temperature T eff , and overall metallicity [M/H] with full-spectral fitting for more than 700 stars and study their spatial distribution.…”

Section: Introductionmentioning

confidence: 99%

KMOS view of the Galactic Centre – II. Metallicity distribution of late-type stars

Feldmeier-Krause

Kerzendorf

Neumayer

et al. 2016

Mon. Not. R. Astron. Soc.

150

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Knowing the metallicity distribution of stars in the Galactic Centre has important implications for the formation history of the Milky Way nuclear star cluster. However, this distribution is not well known, and is currently based on a small sample of fewer than 100 stars. We obtained near-infrared K band spectra of more than 700 late-type stars in the central 4 pc 2 of the Milky Way nuclear star cluster with the integral-field spectrograph KMOS (VLT). We analyse the medium-resolution spectra using a full-spectral fitting method employing the Göttingen Spectral library of synthetic PHOENIX spectra. The derived stellar metallicities range from metal-rich [M/H]>+0.3 dex to metal-poor [M/H]<−1.0 dex, with a fraction of 5.2 +6.0 −3.1 per cent metal-poor ([M/H] −0.5 dex) stars. The metal-poor stars are distributed over the entire observed field. The origin of metal-poor stars remains unclear. They could originate from infalling globular clusters. For the metal-rich stellar population ([M/H] > 0 dex) a globular cluster origin can be ruled out.As there is only a very low fraction of metal-poor stars in the central 4 pc 2 of the Galactic Centre, we believe that our data can discard a scenario in which the Milky Way nuclear star cluster is purely formed from infalling globular clusters.

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Section: Introductionmentioning

confidence: 99%

KMOS view of the Galactic Centre – II. Metallicity distribution of late-type stars

Feldmeier-Krause

Kerzendorf

Neumayer

et al. 2016

Mon. Not. R. Astron. Soc.

150

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“…The primary challenge to studying cluster galaxy populations at z > 1.5 is the need for near-IR spectroscopy. With the installation of efficient multiobject near-IR spectrographs such as Subaru/FMOS (Kimura et al 2010), VLT/KMOS (Sharples et al 2013), and Keck/MOSFIRE (McLean et al 2012), we can now obtain key rest-frame features from [O ii]λ3727, 3729 Å to [Sii]λ6717, 6731 Å for galaxy clusters at z > 1.5. These spectral features have been used to establish empirical scaling relations at z ∼ 0 that we can now test at z ∼ 2, i.e.…”

Section: Introductionmentioning

confidence: 99%

ZFIRE: GALAXY CLUSTER KINEMATICS, HαSTAR FORMATION RATES, AND GAS PHASE METALLICITIES OF XMM-LSS J02182-05102 AT ${z}_{\mathrm{cl}}=1.6233$

Tran

Nanayakkara

Yuan

et al. 2015

ApJ

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“…Within the CF-HiZELS survey of the SA22 field, we have identified a significant (∼ 8σ) over-density of Hα emitters within a 3000 Mpc 3 volume (co-moving). To compile resolved dynamics, measure the disk turbulence and rotation speed of galaxies within this volume, we have obtained the spatially resolved Hα measurements with the KMOS Integral field spectrograph (Sharples et al 2013) during science verification time 5 . In this paper, we use these data to investigate the dynamical properties of the galaxies, the evolution of the luminosity and stellar mass scaling relations (through the Tully-Fisher relation), and the star formation and enrichment within their ISM.…”

Section: Introductionmentioning

confidence: 99%

THE DYNAMICS OFz= 0.8 Hα-SELECTED STAR-FORMING GALAXIES FROM KMOS/CF-HiZELS

Sobral

Swinbank

Stott

et al. 2013

ApJ

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We present the spatially resolved Hα dynamics of 16 star-forming galaxies at z ∼ 0.81 using the new KMOS multi-object integral field spectrograph on the ESO Very Large Telescope. These galaxies, selected using 1.18 µm narrow-band imaging from the 10 deg 2 CFHT-HiZELS survey of the SA 22 hr field, are found in a ∼ 4 Mpc over-density of Hα emitters and likely reside in a group/intermediate environment, but not a cluster. We confirm and identify a rich group of star-forming galaxies at z = 0.813 ± 0.003, with 13 galaxies within 1000 km s −1 of each other, and seven within a diameter of 3 Mpc. All our galaxies are "typical" star-forming galaxies at their redshift, 0.8 ±0.4 SFR * z=0.8 , spanning a range of specific star formation rates (sSFRs) of 0.2-1.1 Gyr −1 and have a median metallicity very close to solar of 12 + log(O/H) = 8.62 ± 0.06. We measure the spatially resolved Hα dynamics of the galaxies in our sample and show that 13 out of 16 galaxies can be described by rotating disks and use the data to derive inclination corrected rotation speeds of 50-275 km s −1 . The fraction of disks within our sample is 75% ± 8%, consistent with previous results based on HST morphologies of Hα-selected galaxies at z ∼ 1 and confirming that disks dominate the star formation rate density at z ∼ 1. Our Hα galaxies are well fitted by the z ∼ 1 − 2 Tully-Fisher (TF) relation, confirming the evolution seen in the zero-point. Apart from having, on average, higher stellar masses and lower sSFRs, our group galaxies at z = 0.81 present the same mass-metallicity and TF relation as z ∼ 1 field galaxies and are all disk galaxies.

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Performance of the K-band multi-object spectrograph (KMOS) on the ESO VLT

Cited by 10 publications

References 12 publications

KMOS view of the Galactic Centre – II. Metallicity distribution of late-type stars

KMOS view of the Galactic Centre – II. Metallicity distribution of late-type stars

ZFIRE: GALAXY CLUSTER KINEMATICS, HαSTAR FORMATION RATES, AND GAS PHASE METALLICITIES OF XMM-LSS J02182-05102 AT ${z}_{\mathrm{cl}}=1.6233$

THE DYNAMICS OFz= 0.8 Hα-SELECTED STAR-FORMING GALAXIES FROM KMOS/CF-HiZELS

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