dc.contributor.author | Davies, CL | |
dc.contributor.author | Rich, EA | |
dc.contributor.author | Harries, TJ | |
dc.contributor.author | Monnier, JD | |
dc.contributor.author | Laws, ASE | |
dc.contributor.author | Andrews, SM | |
dc.contributor.author | Bae, J | |
dc.contributor.author | Wilner, DJ | |
dc.contributor.author | Anugu, N | |
dc.contributor.author | Ennis, J | |
dc.contributor.author | Gardner, T | |
dc.contributor.author | Kraus, S | |
dc.contributor.author | Labdon, A | |
dc.contributor.author | le Bouquin, J-B | |
dc.contributor.author | Lanthermann, C | |
dc.contributor.author | Schaefer, GH | |
dc.contributor.author | Setterholm, BR | |
dc.contributor.author | ten Brummelaar, T | |
dc.date.accessioned | 2022-01-19T13:09:03Z | |
dc.date.issued | 2022-01-28 | |
dc.date.updated | 2022-01-19T12:59:08Z | |
dc.description.abstract | We present multi-instrument observations of the disc around the Herbig Ae star, HD 145718, employing geometric and Monte Carlo radiative transfer models to explore the disc orientation, the vertical and radial extent of the near infrared (NIR) scattering surface, and the properties of the dust in the disc surface and sublimation rim. The disc appears inclined at 67−71◦, with position angle, PA= −1.0 − 0.6◦, consistent with previous estimates. The NIR scattering surface extends out to ∼ 75au and we infer an aspect ratio, hscat(r)/r ∼ 0.24 in J-band; ∼ 0.22 in H-band. Our GPI images and VLTI+CHARA NIR interferometry suggest that the disc surface layers are populated by grains λ/2π in size, indicating these grains are aerodynamically supported against settling and/or the density of smaller grains is relatively low. We demonstrate that our geometric analysis provides a reasonable assessment of the height of the NIR scattering surface at the outer edge of the disc and, if the inclination can be independently constrained, has the potential to probe the flaring exponent of the scattering surface in similarly inclined (i 70◦) discs. In re-evaluating HD 145718’s stellar properties, we found that the object’s dimming events -previously characterised as UX Or and dipper variability -are consistent with dust occultation by grains larger, on average, than found in the ISM. This occulting dust likely originates close to the inferred dust sublimation radius at 0.17au. | en_GB |
dc.description.sponsorship | European Commission | en_GB |
dc.description.sponsorship | University of Exeter | en_GB |
dc.description.sponsorship | National Science Foundation (NSF) | en_GB |
dc.description.sponsorship | Science and Technology Facilities Council (STFC) | en_GB |
dc.description.sponsorship | NASA | en_GB |
dc.identifier.citation | Awaiting citation and DOI | en_GB |
dc.identifier.doi | 10.1093/mnras/stac149 | |
dc.identifier.grantnumber | 29239380 | en_GB |
dc.identifier.grantnumber | NSF-AST1830728 | en_GB |
dc.identifier.grantnumber | 1918673 | en_GB |
dc.identifier.grantnumber | HSTHF2-51427.001-A | en_GB |
dc.identifier.uri | http://hdl.handle.net/10871/128470 | |
dc.language.iso | en | en_GB |
dc.publisher | Oxford University Press (OUP) / Royal Astronomical Society | en_GB |
dc.relation.url | https://archive.gemini.edu/searchform | en_GB |
dc.relation.url | http://oidb.jmmc.fr | en_GB |
dc.relation.url | http://archive.eso.org/cms.html | en_GB |
dc.relation.url | https://gitlab.com/clairedavies/sedbys | en_GB |
dc.relation.url | https://irsa.ipac.caltech.edu | en_GB |
dc.rights | © 2022 The Author(s). Published by Oxford University Press on behalf of Royal Astronomical Society | |
dc.subject | accretion discs | en_GB |
dc.subject | radiative transfer | en_GB |
dc.subject | techniques: high angular resolution | en_GB |
dc.subject | circumstellar matter | en_GB |
dc.subject | stars: individual: HD145718 | en_GB |
dc.subject | stars: formation | en_GB |
dc.title | Scattering and sublimation: a multi-scale view of µm-sized dust in the inclined disc of HD 145718 | en_GB |
dc.type | Article | en_GB |
dc.date.available | 2022-01-19T13:09:03Z | |
dc.identifier.issn | 1365-2966 | |
dc.description | This is the final version. Available from Oxford University Press via the DOI in this record | en_GB |
dc.description | Data availability: The GPI data are available from the Gemini Observatory Archive at https://archive.gemini.edu/searchform and can be accessed using proposal number GS-2018A-LP-12. The MIRC-X data will be made available through the OiDB (http://oidb.jmmc.fr) following publication. VLTI/GRAVITY and VLTI/PIONIER data are available in the ESO archive (http://archive.eso.org/ cms.html) and the OiDB and can be accessed using the target name ‘HD 145718’. The photometry are accessible through SEDBYS,available at https://gitlab.com/clairedavies/sedbys. The IR spectra are available in the IRSA (https://irsa.ipac. caltech.edu). | en_GB |
dc.identifier.journal | Monthly Notices of the Royal Astronomical Society | en_GB |
dc.rights.uri | http://www.rioxx.net/licenses/all-rights-reserved | en_GB |
dcterms.dateAccepted | 2022-01-17 | |
rioxxterms.version | VoR | en_GB |
rioxxterms.licenseref.startdate | 2022-01-17 | |
rioxxterms.type | Journal Article/Review | en_GB |
refterms.dateFCD | 2022-01-19T12:59:11Z | |
refterms.versionFCD | AM | |
refterms.dateFOA | 2022-03-02T14:34:27Z | |
refterms.panel | B | en_GB |