Narrow belt of debris around the Sco-Cen star HD 141011
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Publication date
2021
Author
- Bonnefoy, M.;
- Milli, J.;
- Menard, F.;
- Delorme, P.;
- Chomez, A.;
- Bonavita, M.;
- Lagrange, A-M;
- Vigan, A.;
- Augereau, J. C.;
- Beuzit, J. L.;
- Biller, B.;
- Boccaletti, A.;
- Chauvin, G.;
- Desidera, S.;
- Faramaz, V.;
- Galicher, R.;
- Gratton, R.;
- Hinkley, S.;
- Lazzoni, C.;
- Matthews, E.;
- Mesa, D.;
- Mordasini, C.;
- Mouillet, D.;
- Olofsson, J.;
- Pinte, C.;
Abstract
Context. We initiated a deep-imaging survey of Scorpius-Centaurus A-F stars in 2015. These stars are predicted to host warm inner
and cold outer belts of debris reminiscent of the architecture of emblematic systems such as HR 8799.
Aims. We present resolved images of a ring of debris around the F5-type star HD 141011 that was observed as part of our survey.
We aim to set constraints on the properties of the disk, compare them to those of other resolved debris disks in Sco-Cen, and detect
companions.
Methods. We obtained high-contrast coronagraphic observations of HD 141011 in 2015, 2016, and 2019 with VLT/SPHERE. We
removed the stellar halo using angular differential imaging. We searched for scattered light emission from a disk in the residuals and
applied a forward-modeling approach to retrieve its morphological and photometric properties. We combined our radial velocity and
imaging data to derive detection probabilities for companions co-planar with the disk orientation.
Results. We resolve a narrow ring of debris that extends up to ∼1.100 (∼141 au) from the star in the IRDIS and IFS data obtained in
2016 and 2019. The disk is not detected in the 2015 data which are of poorer quality. The disks is best reproduced by models of a
noneccentric ring centered on the star with an inclination of 69.1 ± 0.9
◦
, a position angle of −24.6 ± 1.7
◦
, and a semimajor axis of
127.5 ± 3.8 au. The combination of radial velocity and imaging data excludes brown-dwarf (M > 13.6 MJup) companions coplanar with
the disk from 0.1 to 0.9 au and from 20 au up to 500 au (90% probability).
Conclusions. HD 141011 adds to the growing list of debris disks that are resolved in Sco-Cen. It is one of the faintest disks that are
resolved from the ground and has a radial extent and fractional width (∼12.5%) reminiscent of Fomalhaut. Its moderate inclination
and large semimajor axis make it a good target for the James Webb Space Telescope and should allow a deeper search for putative
companions shaping the dust distribution.
Patrocinador
French National Research Agency (ANR) ANR-14-CE33-0018
ANR-20-CE31-0012
France from the CNRS-D2P PICS grant
France from the Programmes Nationaux de Planetologie et de Physique Stellaire (PNP)
France from the Programmes Nationaux de Planetologie et de Physique Stellaire (PNPS)
European Research Council (ERC) 885 593
Istituto Nazionale Astrofisica (INAF)
Agenzia Spaziale Italiana (ASI) 2018-16-HH.0
PRIN-INAF 2019 "Planetary systems at young ages (PLATEA)"
Australian Research Council FT170100040
DP180104235
ANID, -Millennium Science Initiative Program NCN19_171
Comision Nacional de Investigacion Cientifica y Tecnologica (CONICYT)
CONICYT FONDECYT 1180395
French National Research Agency (ANR) ANR10 LABX56
Spanish Government AyA2017-84089
European Commission 776403
Universidad de Valparaiso
Indexation
Artículo de publícación WoS
Quote Item
A&A 655, A62 (2021)
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