Transition disks: Four candidates for ongoing giant planet formation in Ophiuchus
Among the large set of Spitzer-selected transitional disks that we have examined in the Ophiuchus molecular, four disks have been identified as (giant) planet-forming candidates based on the morphology of their spectral energy distributions (SEDs), their apparent lack of stellar companions, and evid...
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2012
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00046361_v539_n_p_Orellana http://hdl.handle.net/20.500.12110/paper_00046361_v539_n_p_Orellana |
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paper:paper_00046361_v539_n_p_Orellana2023-06-08T14:28:00Z Transition disks: Four candidates for ongoing giant planet formation in Ophiuchus protoplanetary disks stars: pre-main sequence submillimeter: planetary systems Best-fit model parameters Density profile Dust distribution Dust settling Giant planet formation Giant planets Inner cavities MONTE CARLO Monte Carlo Markov chain Parameter spaces Parameter values Parametric models Protoplanetary disks Spectral energy distribution stars: pre-main sequence Statistical confidence Submillimeter: planetary systems Temperature structure Thermal equilibriums Grain growth Stars Dust Among the large set of Spitzer-selected transitional disks that we have examined in the Ophiuchus molecular, four disks have been identified as (giant) planet-forming candidates based on the morphology of their spectral energy distributions (SEDs), their apparent lack of stellar companions, and evidence of accretion. Here we characterize the structures of these disks modeling their optical, infrared, and (sub)millimeter SEDs. We use the Monte Carlo radiative transfer package RADMC to construct a parametric model of the dust distribution in a flared disk with an inner cavity and calculate the temperature structure that is consistent with the density profile, when the disk is in thermal equilibrium with the irradiating star. For each object, we conducted a Bayesian exploration of the parameter space generating Monte Carlo Markov chains (MCMC) that allow the identification of the best-fit model parameters and to constrain their range of statistical confidence. Our calculations imply that evacuated cavities with radii ∼2-8 AU are present that appear to have been carved by embedded giant planets. We found parameter values that are consistent with those previously given in the literature, indicating that there has been a mild degree of grain growth and dust settling, which deserves to be investigated with further modeling and follow-up observations. Resolved images with (sub)millimeter interferometers would be required to break some of the degeneracies of the models and more tightly constrain the physical properties of these fascinating disks. © 2012 ESO. 2012 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00046361_v539_n_p_Orellana http://hdl.handle.net/20.500.12110/paper_00046361_v539_n_p_Orellana |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
protoplanetary disks stars: pre-main sequence submillimeter: planetary systems Best-fit model parameters Density profile Dust distribution Dust settling Giant planet formation Giant planets Inner cavities MONTE CARLO Monte Carlo Markov chain Parameter spaces Parameter values Parametric models Protoplanetary disks Spectral energy distribution stars: pre-main sequence Statistical confidence Submillimeter: planetary systems Temperature structure Thermal equilibriums Grain growth Stars Dust |
| spellingShingle |
protoplanetary disks stars: pre-main sequence submillimeter: planetary systems Best-fit model parameters Density profile Dust distribution Dust settling Giant planet formation Giant planets Inner cavities MONTE CARLO Monte Carlo Markov chain Parameter spaces Parameter values Parametric models Protoplanetary disks Spectral energy distribution stars: pre-main sequence Statistical confidence Submillimeter: planetary systems Temperature structure Thermal equilibriums Grain growth Stars Dust Transition disks: Four candidates for ongoing giant planet formation in Ophiuchus |
| topic_facet |
protoplanetary disks stars: pre-main sequence submillimeter: planetary systems Best-fit model parameters Density profile Dust distribution Dust settling Giant planet formation Giant planets Inner cavities MONTE CARLO Monte Carlo Markov chain Parameter spaces Parameter values Parametric models Protoplanetary disks Spectral energy distribution stars: pre-main sequence Statistical confidence Submillimeter: planetary systems Temperature structure Thermal equilibriums Grain growth Stars Dust |
| description |
Among the large set of Spitzer-selected transitional disks that we have examined in the Ophiuchus molecular, four disks have been identified as (giant) planet-forming candidates based on the morphology of their spectral energy distributions (SEDs), their apparent lack of stellar companions, and evidence of accretion. Here we characterize the structures of these disks modeling their optical, infrared, and (sub)millimeter SEDs. We use the Monte Carlo radiative transfer package RADMC to construct a parametric model of the dust distribution in a flared disk with an inner cavity and calculate the temperature structure that is consistent with the density profile, when the disk is in thermal equilibrium with the irradiating star. For each object, we conducted a Bayesian exploration of the parameter space generating Monte Carlo Markov chains (MCMC) that allow the identification of the best-fit model parameters and to constrain their range of statistical confidence. Our calculations imply that evacuated cavities with radii ∼2-8 AU are present that appear to have been carved by embedded giant planets. We found parameter values that are consistent with those previously given in the literature, indicating that there has been a mild degree of grain growth and dust settling, which deserves to be investigated with further modeling and follow-up observations. Resolved images with (sub)millimeter interferometers would be required to break some of the degeneracies of the models and more tightly constrain the physical properties of these fascinating disks. © 2012 ESO. |
| title |
Transition disks: Four candidates for ongoing giant planet formation in Ophiuchus |
| title_short |
Transition disks: Four candidates for ongoing giant planet formation in Ophiuchus |
| title_full |
Transition disks: Four candidates for ongoing giant planet formation in Ophiuchus |
| title_fullStr |
Transition disks: Four candidates for ongoing giant planet formation in Ophiuchus |
| title_full_unstemmed |
Transition disks: Four candidates for ongoing giant planet formation in Ophiuchus |
| title_sort |
transition disks: four candidates for ongoing giant planet formation in ophiuchus |
| publishDate |
2012 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00046361_v539_n_p_Orellana http://hdl.handle.net/20.500.12110/paper_00046361_v539_n_p_Orellana |
| _version_ |
1768545858352054272 |