dc.contributor.author | Laws, A | |
dc.contributor.author | Harries, T | |
dc.contributor.author | Setterholm, B | |
dc.contributor.author | Monnier, J | |
dc.contributor.author | Rich, E | |
dc.contributor.author | Aarnio, A | |
dc.contributor.author | Adams, F | |
dc.contributor.author | Andrews, S | |
dc.contributor.author | Bae, J | |
dc.contributor.author | Calvet, N | |
dc.contributor.author | Espaillat, C | |
dc.contributor.author | Hartmann, L | |
dc.contributor.author | Hinkley, A | |
dc.contributor.author | isella, A | |
dc.contributor.author | Kraus, S | |
dc.contributor.author | Wilner, D | |
dc.contributor.author | Zhu, Z | |
dc.date.accessioned | 2019-11-25T11:40:04Z | |
dc.date.issued | 2019-12-27 | |
dc.description.abstract | We are undertaking a large survey of over thirty disks using the Gemini Planet Imager (GPI) to
see whether the observed dust structures match spectral energy distribution (SED) predictions and
have any correlation with stellar properties. GPI can observe near-infrared light scattered from dust
in circumstellar environments using high-resolution Polarimetric Differential Imaging (PDI) with coronagraphy and adaptive optics. The data have been taken in J and H bands over two years, with inner
working angles of 0.08 ” and 0.11 ” respectively. Ahead of the release of the complete survey results,
here we present five objects with extended and irregular dust structures within 2 ” of the central star.
These objects are: FU Ori; MWC 789; HD 45677; Hen 3-365; and HD 139614. The observed structures are consistent with each object being a pre-main-sequence star with protoplanetary dust. The
five objects’ circumstellar environments could result from extreme youth and complex initial conditions, from asymmetric scattering patterns due to shadows cast by misaligned disks, or in some cases
from interactions with companions. We see complex Uφ structures in most objects that could indicate
multiple scattering or result from the illumination of companions. Specific key findings include the
first high-contrast observation of MWC 789 revealing a newly-discovered companion candidate and arc,
and two faint companion candidates around Hen 3-365. These two objects should be observed further
to confirm whether the companion candidates are co-moving. Further observations and modeling are
required to determine the causes of the structures. | en_GB |
dc.description.sponsorship | Science and Technology Facilities Council (STFC) | en_GB |
dc.identifier.citation | Vol. 888, article 7 | en_GB |
dc.identifier.doi | 10.3847/1538-4357/ab59e2 | |
dc.identifier.grantnumber | 1918673 | en_GB |
dc.identifier.uri | http://hdl.handle.net/10871/39774 | |
dc.language.iso | en | en_GB |
dc.publisher | American Astronomical Society | en_GB |
dc.rights | © 2019. The American Astronomical Society. All rights reserved. | |
dc.subject | infrared | en_GB |
dc.subject | planetary systems | en_GB |
dc.subject | planet-disk interactions | en_GB |
dc.subject | protoplanetary disks | en_GB |
dc.subject | techniques | en_GB |
dc.subject | high angular resolution | en_GB |
dc.subject | polarimetric | en_GB |
dc.title | Irregular dust features around intermediate-mass young stars with GPI: signs of youth or misaligned disks? | en_GB |
dc.type | Article | en_GB |
dc.date.available | 2019-11-25T11:40:04Z | |
dc.identifier.issn | 0004-637X | |
dc.description | This is the final version. Available from the American Astronomical Society via the DOI in this record | en_GB |
dc.identifier.journal | Astrophysical Journal | en_GB |
dc.rights.uri | http://www.rioxx.net/licenses/all-rights-reserved | en_GB |
dcterms.dateAccepted | 2019-11-07 | |
rioxxterms.version | AM | en_GB |
rioxxterms.licenseref.startdate | 2019-11-07 | |
rioxxterms.type | Journal Article/Review | en_GB |
refterms.dateFCD | 2019-11-25T10:20:35Z | |
refterms.versionFCD | AM | |
refterms.dateFOA | 2020-01-31T03:03:11Z | |
refterms.panel | B | en_GB |