Introducing CUBES: the Cassegrain U-band Brazil-ESO spectrograph

Paul Bristow; Beatriz Barbuy; Vanessa Bawden Macanhan; Bruno Castilho; Hans Dekker; Bernard Delabre; Marcos Diaz; Clemens Gneiding; Florian Kerber; Harald Kuntschner; Giovanni La Mura; Roland Reiss; J. Vernet

doi:10.1117/12.2054751

8 July 2014 Introducing CUBES: the Cassegrain U-band Brazil-ESO spectrograph

Paul Bristow, Beatriz Barbuy, Vanessa Bawden Macanhan, Bruno Castilho, Hans Dekker, Bernard Delabre, Marcos Diaz, Clemens Gneiding, Florian Kerber, Harald Kuntschner, Giovanni La Mura, Roland Reiss, J. Vernet

Author Affiliations +

Proceedings Volume 9147, Ground-based and Airborne Instrumentation for Astronomy V; 914709 (2014) https://doi.org/10.1117/12.2054751
Event: SPIE Astronomical Telescopes + Instrumentation, 2014, Montréal, Quebec, Canada

Abstract

CUBES is a high-efficiency, medium-resolution (R ≃ 20, 000) spectrograph dedicated to the “ground based UV” (approximately the wavelength range from 300 to 400nm) destined for the Cassegrain focus of one of ESO’s VLT unit telescopes in 2018/19. The CUBES project is a joint venture between ESO and Instituto de Astronomia, Geof´ısica e Ciˆencias Atmosf´ericas (IAG) at the Universidade de S˜ao Paulo and the Brazilian Laborat´orio Nacional de Astrofs´ıca (LNA). CUBES will provide access to a wealth of new and relevant information for stellar as well as extra-galactic sources. Principle science cases include the study of heavy elements in metal-poor stars, the direct determination of carbon, nitrogen and oxygen abundances by study of molecular bands in the UV range and the determination of the Beryllium abundance as well as the study of active galactic nuclei and the inter-galactic medium. With a streamlined modern instrument design, high efficiency dispersing elements and UV-sensitive detectors, it will enable a significant gain in sensitivity over existing ground based medium-high resolution spectrographs enabling vastly increased sample sizes accessible to the astronomical community. We present here a brief overview of the project, introducing the science cases that drive the design and discussing the design options and technological challenges.

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Paul Bristow, Beatriz Barbuy, Vanessa Bawden Macanhan, Bruno Castilho, Hans Dekker, Bernard Delabre, Marcos Diaz, Clemens Gneiding, Florian Kerber, Harald Kuntschner, Giovanni La Mura, Roland Reiss, and J. Vernet "Introducing CUBES: the Cassegrain U-band Brazil-ESO spectrograph", Proc. SPIE 9147, Ground-based and Airborne Instrumentation for Astronomy V, 914709 (8 July 2014); https://doi.org/10.1117/12.2054751

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KEYWORDS

Ultraviolet radiation

Stars

Spectrographs

Beryllium

Chemical elements

Galactic astronomy

Sensors

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