Design, construction, and performance of UVES, the echelle spectrograph for the UT2 Kueyen Telescope at the ESO Paranal Observatory

Dekker, H.; D’Odorico, S.; Kaufer, A.; Délabre, Bernard; Kotzlowski, Heinz

doi:10.1117/12.395512

Cited by 874 publications

(549 citation statements)

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“…The new N i measurements are from a sample of 250 quasar spectra observed with the Ultraviolet Visual Echelle Spectrograph (UVES) Dekker et al (2000) mounted on the European Southern Observatory's (ESO), Very Large Telescope (VLT). Zafar et al (2013b) have taken advantages of the ESO advanced data archive to build the so-called EU-ADP (ESO UVES Advanced Data Products) sample of highresolution quasar spectra.…”

Section: New Datamentioning

confidence: 99%

The ESO UVES advanced data products quasar sample – III. Evidence of bimodality in the [N/α] distribution

Zafar¹,

Centurión²,

Péroux³

et al. 2014

Monthly Notices of the Royal Astronomical Society

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Section: New Datamentioning

confidence: 99%

The ESO UVES advanced data products quasar sample – III. Evidence of bimodality in the [N/α] distribution

Zafar¹,

Centurión²,

Péroux³

et al. 2014

Monthly Notices of the Royal Astronomical Society

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“…Observations, atmospheric parameters, and abundances for elements other than S have been presented in Gratton et al (2001), Carretta et al (2004), and Bonifacio et al (2007). We are only concerned here with the dichroic #2, CD4 cross-disperser UVES@VLT (Dekker et al 2000) spectra (setting centered at 760 nm). For most observations, the slit width was of 1 for a resolution of R ∼ 43 000.…”

Section: Observational Datamentioning

confidence: 99%

Sulfur in the globular clusters 47 Tucanae and NGC 6752

Sbordone

Limongi

Chieffi

et al. 2009

A&A

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Context. The light elements Li, O, Na, Al, and Mg are known to show star-to-star variations in the globular clusters 47 Tuc and NGC 6752. Such variations are interpreted as coming from processing in a previous generation of stars. Aims. In this paper we investigate the abundances of the α-element sulfur, for which no previous measurements exist. In fact this element has not been investigated in any Galactic globular cluster so far. The only globular cluster for which such measurements are available is Terzan 7, which belongs to the Sgr dSph.Methods. We use high-resolution spectra of the S i Mult. 1, acquired with the UVES spectrograph at the 8.2 m VLT-Kueyen telescope, for turn-off and giant stars in the two globular clusters. The spectra were analysed making use of ATLAS static plane parallel model atmospheres and SYNTHE spectrum synthesis. We also compute 3D corrections from CO 5 BOLD hydrodynamic models and apply corrections due to NLTE effects taken from the literature. Results. In the cluster NGC 6752 sulfur has been measured only in four subgiant stars. We find no significant star-to-star scatter and a mean [S/Fe] = +0.49 ± 0.15, consistent with what is observed in field stars of the same metallicity. In the cluster 47 Tuc we measured S in 4 turn-off and 5 subgiant stars with a mean [S/Fe] = +0.18 ± 0.14. While this result is compatible with no star-to-star scatter we notice a statistically significant correlation of the sulfur abundance with the sodium abundance and a tentative correlation with the silicon abundance. Conclusions. The sulfur-sodium correlation is not easily explained in terms of nucleosynthesis. An origin due to atomic diffusion can be easily dismissed. The correlation cannot be easily dismissed either, in view of its statistical significance, until better data for more stars is available.

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“…We observed QS Vir with the high resolution Echelle spectrograph UVES (Dekker et al 2000) installed at the European Southern Observatory Very Large Telescope (ESO VLT) 8.2-m telescope unit on Cerro Paranal. We used the dichroic 2 setup allowing us to cover 3760Å-4990Å in the blue arm and 5690Å-9460Å in the red arm, with a small gap between 7520Å and 7660Å and 2x2 binning in both arms.…”

Section: Uves Spectroscopymentioning

confidence: 99%

The crowded magnetosphere of the post-common-envelope binary QS Virginis

Parsons

Hill

Marsh

et al. 2016

Mon. Not. R. Astron. Soc.

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We present high speed photometry and high resolution spectroscopy of the eclipsing post common envelope binary QS Virginis (QS Vir). Our UVES spectra span multiple orbits over more than a year and reveal the presence of several large prominences passing in front of both the M star and its white dwarf companion, allowing us to triangulate their positions. Despite showing small variations on a timescale of days, they persist for more than a year and may last decades. One large prominence extends almost three stellar radii from the M star. Roche tomography reveals that the M star is heavily spotted and that these spots are longlived and in relatively fixed locations, preferentially found on the hemisphere facing the white dwarf. We also determine precise binary and physical parameters for the system. We find that the 14, 220 ± 350 K white dwarf is relatively massive, 0.782 ± 0.013M ⊙ , and has a radius of 0.01068 ± 0.00007R ⊙ , consistent with evolutionary models. The tidally distorted M star has a mass of 0.382 ± 0.006M ⊙ and a radius of 0.381 ± 0.003R ⊙ , also consistent with evolutionary models. We find that the magnesium absorption line from the white dwarf is broader than expected. This could be due to rotation (implying a spin period of only ∼700 seconds), or due to a weak (∼100kG) magnetic field, we favour the latter interpretation. Since the M star's radius is still within its Roche lobe and there is no evidence that its over-inflated we conclude that QS Vir is most likely a pre-cataclysmic binary just about to become semi-detached.

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Design, construction, and performance of UVES, the echelle spectrograph for the UT2 Kueyen Telescope at the ESO Paranal Observatory

Cited by 874 publications

References 1 publication

The ESO UVES advanced data products quasar sample – III. Evidence of bimodality in the [N/α] distribution

The ESO UVES advanced data products quasar sample – III. Evidence of bimodality in the [N/α] distribution

Sulfur in the globular clusters 47 Tucanae and NGC 6752

The crowded magnetosphere of the post-common-envelope binary QS Virginis

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