MARVEL, a four-telescope array for high-precision radial-velocity monitoring

G. Raskin*, C. Schwab, B. Vandenbussche, J. De Ridder, C. Lanthermann, J. Pérez Padilla, A. Tkachenko, H. Sana, P. Royer, S. Prins, L. Decin, D. Defrère, J. Pember, D. Atkinson, A. Glasse, D. Pollacco, G. Tinetti, M. Güdel, J. Stürmer, I. RibasA. Brandeker, L. Buchhave, S. Halverson, G. Avila, J. Morren, H. Van Winckel

*Corresponding author for this work

    Research output: Chapter in Book/Report/Conference proceedingConference proceeding contributionpeer-review

    1 Citation (Scopus)

    Abstract

    Since the first discovery of a planet outside of our Solar System in 1995, exoplanet research has shifted from detecting to characterizing worlds around other stars. The TESS (NASA, launched 2019) and PLATO mission (ESA, planned launch 2026) will find and constrain the size of thousands of exoplanets around bright stars all over the sky. Radial velocity measurements are needed to characterize the orbit and mass, and complete the picture of densities and composition of the exoplanet systems found. The Ariel mission (ESA, planned launch 2028) will characterize exoplanet atmospheres with infrared spectroscopy. Characterization of stellar activity using optical spectroscopy from the ground is key to retrieve the spectral footprint of the planetary atmosphere in Ariel's spectra. To enable the scientific harvest of the TESS, PLATO and Ariel space missions, we plan to install MARVEL as an extension of the existing Mercator Telescope at the Roque De Los Muchachos Observatory on La Palma (SPAIN). MARVEL consists of an array of four 80 cm telescopes linked through optical fibers to a single high-resolution echelle spectrograph, optimized for extreme-precision radial velocity measurements. It can observe the radial velocities of four different stars simultaneously or, alternatively, combine the flux from four telescopes pointing to a single faint target in one spectrum. MARVEL is constructed by a KU Leuven (Belgium) led collaboration, with contributions from the UK, Austria, Australia, Sweden, Denmark and Spain. In this paper, we present the MARVEL instrument with special focus on the optical design and expected performance of the spectrograph, and report on the status of the project.

    Original languageEnglish
    Title of host publicationGround-Based and Airborne Instrumentation for Astronomy VIII
    EditorsChristopher J. Evans, Julia J. Bryant, Kentaro Motohara
    Place of PublicationBellingham, Washington
    PublisherSPIE
    Pages114473K-1-114473K-11
    Number of pages11
    ISBN (Electronic)9781510636828
    ISBN (Print)9781510636811
    DOIs
    Publication statusPublished - 13 Dec 2020
    EventGround-Based and Airborne Instrumentation for Astronomy VIII 2020 - Virtual, Online, United States
    Duration: 14 Dec 202022 Dec 2020

    Publication series

    NameProceedings of SPIE
    PublisherSPIE
    Volume11447
    ISSN (Print)0277-786X
    ISSN (Electronic)1996-756X

    Conference

    ConferenceGround-Based and Airborne Instrumentation for Astronomy VIII 2020
    CountryUnited States
    CityVirtual, Online
    Period14/12/2022/12/20

    Keywords

    • Optical fiber
    • Radial velocity
    • Spectrograph
    • Telescopes

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