The debris disc of HD 131488 : bringing together thermal emission and scattered light
- Author
- Nicole Pawellek, Attila Moor, Florian Kirchschlager (UGent) , Julien Milli, Agnes Kospal, Peter Abraham, Sebastian Marino, Mark Wyatt, Isabel Rebollido, A. Meredith Hughes, Faustine Cantalloube and Thomas Henning
- Organization
- Abstract
- We show the first SPHERE/IRDIS and IFS data of the CO-rich debris disc around HD 131488. We use N-body simulations to model both the scattered light images and the spectral energy distribution of the disc in a self-consistent way. We apply the Henyey-Greenstein approximation, Mie theory, and the Discrete Dipole Approximation to model the emission of individual dust grains. Our study shows that only when gas drag is taken into account can we find a model that is consistent with scattered light as well as thermal emission data of the disc. The models suggest a gas surface density of 2 x 10(-5) M(circle plus)au(-2) which is in agreement with estimates from ALMA observations. Thus, our modelling procedure allows us to roughly constrain the expected amount of gas in a debris disc without actual gas measurements. We also show that the shallow size distribution of the dust leads to a significant contribution of large particles to the overall amount of scattered light. The scattering phase function indicates a dust porosity of similar to 0.2...0.6 which is in agreement with a pebble pile scenario for planetesimal growth.
- Keywords
- circumstellar matter, stars: individual (HD 131488), infrared: stars, DUST GRAIN POROSITY, OPTICAL-PROPERTIES, RADIATION-PRESSURE, MOLECULAR GAS, CO GAS, SIZE DISTRIBUTION, EXOCOMETARY GAS, PHASE FUNCTION, HR 4796, EVOLUTION, Astrophysics - Earth and Planetary Astrophysics, Astrophysics - Solar and Stellar Astrophysics
Downloads
-
stad3455.pdf
- full text (Published version)
- |
- open access
- |
- |
- 4.40 MB
Citation
Please use this url to cite or link to this publication: http://hdl.handle.net/1854/LU-01JXCJ7R1BG3N24JG4KNF6K6MH
- MLA
- Pawellek, Nicole, et al. “The Debris Disc of HD 131488 : Bringing Together Thermal Emission and Scattered Light.” MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, vol. 527, no. 2, 2024, pp. 3559–84, doi:10.1093/mnras/stad3455.
- APA
- Pawellek, N., Moor, A., Kirchschlager, F., Milli, J., Kospal, A., Abraham, P., … Henning, T. (2024). The debris disc of HD 131488 : bringing together thermal emission and scattered light. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 527(2), 3559–3584. https://doi.org/10.1093/mnras/stad3455
- Chicago author-date
- Pawellek, Nicole, Attila Moor, Florian Kirchschlager, Julien Milli, Agnes Kospal, Peter Abraham, Sebastian Marino, et al. 2024. “The Debris Disc of HD 131488 : Bringing Together Thermal Emission and Scattered Light.” MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 527 (2): 3559–84. https://doi.org/10.1093/mnras/stad3455.
- Chicago author-date (all authors)
- Pawellek, Nicole, Attila Moor, Florian Kirchschlager, Julien Milli, Agnes Kospal, Peter Abraham, Sebastian Marino, Mark Wyatt, Isabel Rebollido, A. Meredith Hughes, Faustine Cantalloube, and Thomas Henning. 2024. “The Debris Disc of HD 131488 : Bringing Together Thermal Emission and Scattered Light.” MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 527 (2): 3559–3584. doi:10.1093/mnras/stad3455.
- Vancouver
- 1.Pawellek N, Moor A, Kirchschlager F, Milli J, Kospal A, Abraham P, et al. The debris disc of HD 131488 : bringing together thermal emission and scattered light. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY. 2024;527(2):3559–84.
- IEEE
- [1]N. Pawellek et al., “The debris disc of HD 131488 : bringing together thermal emission and scattered light,” MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, vol. 527, no. 2, pp. 3559–3584, 2024.
@article{01JXCJ7R1BG3N24JG4KNF6K6MH,
abstract = {{We show the first SPHERE/IRDIS and IFS data of the CO-rich debris disc around HD 131488. We use N-body simulations to model both the scattered light images and the spectral energy distribution of the disc in a self-consistent way. We apply the Henyey-Greenstein approximation, Mie theory, and the Discrete Dipole Approximation to model the emission of individual dust grains. Our study shows that only when gas drag is taken into account can we find a model that is consistent with scattered light as well as thermal emission data of the disc. The models suggest a gas surface density of 2 x 10(-5) M(circle plus)au(-2) which is in agreement with estimates from ALMA observations. Thus, our modelling procedure allows us to roughly constrain the expected amount of gas in a debris disc without actual gas measurements. We also show that the shallow size distribution of the dust leads to a significant contribution of large particles to the overall amount of scattered light. The scattering phase function indicates a dust porosity of similar to 0.2...0.6 which is in agreement with a pebble pile scenario for planetesimal growth.}},
author = {{Pawellek, Nicole and Moor, Attila and Kirchschlager, Florian and Milli, Julien and Kospal, Agnes and Abraham, Peter and Marino, Sebastian and Wyatt, Mark and Rebollido, Isabel and Hughes, A. Meredith and Cantalloube, Faustine and Henning, Thomas}},
issn = {{0035-8711}},
journal = {{MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY}},
keywords = {{circumstellar matter,stars: individual (HD 131488),infrared: stars,DUST GRAIN POROSITY,OPTICAL-PROPERTIES,RADIATION-PRESSURE,MOLECULAR GAS,CO GAS,SIZE DISTRIBUTION,EXOCOMETARY GAS,PHASE FUNCTION,HR 4796,EVOLUTION,Astrophysics - Earth and Planetary Astrophysics,Astrophysics - Solar and Stellar Astrophysics}},
language = {{eng}},
number = {{2}},
pages = {{3559--3584}},
title = {{The debris disc of HD 131488 : bringing together thermal emission and scattered light}},
url = {{http://doi.org/10.1093/mnras/stad3455}},
volume = {{527}},
year = {{2024}},
}
- Altmetric
- View in Altmetric
- Web of Science
- Times cited: