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    Searching for Hα emitting sources around MWC 758 SPHERE/ZIMPOL high-contrast imaging


    Huélamo, N. and Chauvin, G. and Schmid-Hempel, Paul and Quanz, S.P. and Whelan, Emma and Lillo-Box, J. and Barrado, D. and Montesinos, B. and Alcalá, J.M. and Benisty, M. and de Gregorio-Monsalvo, I. and Mendigutía, I. and Bouy, H. and Merin, B. and de Boer, J. and Garufi, A. and Pantin, E. (2018) Searching for Hα emitting sources around MWC 758 SPHERE/ZIMPOL high-contrast imaging. Astronomy & Astrophysics, 613 (L5). ISSN 0004-6361

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    Abstract

    Context. MWC 758 is a young star surrounded by a transitional disk. The disk shows an inner cavity and spiral arms that could be caused by the presence of protoplanets. Recently, a protoplanet candidate has been detected around MWC758 through high-resolution L0-band observations. The candidate is located inside the disk cavity at a separation of _111 mas from the central star, and at an average position angle of _165.5_. Aims. We aim at detecting accreting protoplanet candidates within the disk of MWC 758 through angular spectral differential imaging (ASDI) observations in the optical regime. In particular, we explore the emission at the position of the detected planet candidate. Methods. We have performed simultaneous adaptive optics observations in the H_ line and the adjacent continuum using SPHERE/ZIMPOL at the Very Large Telescope (VLT). Results. The data analysis does not reveal any H_ signal around the target. The derived contrast curve in the B_Ha filter allows us to derive a 5_ upper limit of _7.6 mag at 111 mas, the separation of the previously detected planet candidate. This contrast translates into a H_ line luminosity of LH_ . 5_10

    Item Type: Article
    Keywords: stars; pre-main sequence; planetary systems; individual; MWC758; accretion; accretion disks; techniques; high angular resolution;
    Academic Unit: Faculty of Science and Engineering > Experimental Physics
    Item ID: 13114
    Identification Number: https://doi.org/10.1051/0004-6361/201832874
    Depositing User: Emma Whelan
    Date Deposited: 26 Jun 2020 22:08
    Journal or Publication Title: Astronomy & Astrophysics
    Publisher: EDP Sciences
    Refereed: Yes
    URI:

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