Kirchschlager, F;
Wolf, S;
Brunngräber, R;
Matter, A;
Krivov, AV;
Labdon, A;
(2018)
Modelling of mid-infrared interferometric signature of hot exozodiacal dust emission.
Monthly Notices of the Royal Astronomical Society
, 473
(2)
pp. 2633-2638.
10.1093/mnras/stx2515.
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Abstract
Hot exozodiacal dust emission was detected in recent surveys around two dozen main-sequence stars at distances of less than 1au using the H- and K-band interferometry. Due to the high contrast as well as the small angular distance between the circumstellar dust and the star, direct observation of this dust component is challenging. An alternative way to explore the hot exozodiacal dust is provided by mid-infrared interferometry. We analyse the L, M and N bands interferometric signature of this emission in order to find stronger constraints for the properties and the origin of the hot exozodiacal dust. Considering the parameters of nine debris disc systems derived previously, we model the discs in each of these bands. We find that the M band possesses the best conditions to detect hot dust emission, closely followed by L and N bands. The hot dust in three systems – HD 22484 (10 Tau), HD 102647 (β Leo) and HD 177724 (ζ Aql) – shows a strong signal in the visibility functions, which may even allow one to constrain the dust location. In particular, observations in the mid-infrared could help to determine whether the dust piles up at the sublimation radius or is located at radii up to 1au. In addition, we explore observations of the hot exozodiacal dust with the upcoming mid-infrared interferometer Multi AperTure mid-Infrared SpectroScopic Experiment (MATISSE) at the Very Large Telescope Interferometer.
| Type: | Article |
|---|---|
| Title: | Modelling of mid-infrared interferometric signature of hot exozodiacal dust emission |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1093/mnras/stx2515 |
| Publisher version: | https://doi.org/10.1093/mnras/stx2515 |
| Language: | English |
| Additional information: | This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | techniques: interferometric, interplanetary medium, circumstellar matter, infrared: planetary systems |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10023382 |
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