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
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: |
|
| Use Licence: |
This item is available under a Creative Commons Attribution Non Commercial Share Alike Licence (CC BY-NC-SA). Details of this licence are available
here |
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