Modelování protoplanetárního disku na základě měření z ALMA a VLTI

• Název práce v češtině: Modelování protoplanetárního disku na základě měření z ALMA a VLTI
• Název v anglickém jazyce: Modeling of protoplanetary disks based on ALMA and VLTI measurements
• Klíčová slova: protoplanetární disk|ALMA|přenos záření|tvorba hvězd|rádiová astronomie|interferometrie
• Klíčová slova anglicky: protoplanetary disk|ALMA|radiative transfer|star formation|radio astronomy|interferometry
• Akademický rok vypsání: 2023/2024
• Typ práce: bakalářská práce
• Jazyk práce: čeština
• Ústav: Astronomický ústav UK (32-AUUK)
• Vedoucí / školitel: doc. Mgr. Miroslav Brož, Ph.D.
• Řešitel: Bc. Marco Souza de Joode - zadáno a potvrzeno stud. odd.
• Datum přihlášení: 24.01.2024
• Datum zadání: 24.01.2024
• Datum potvrzení stud. oddělením: 24.01.2024
• Datum a čas obhajoby: 20.06.2024 09:00
• Datum odevzdání elektronické podoby: 09.05.2024
• Datum odevzdání tištěné podoby: 09.05.2024
• Datum proběhlé obhajoby: 20.06.2024
• Oponenti: Mgr. Richard Wünsch, Ph.D.

Zásady pro vypracování

The DoAr 44 system is located in the Ophiuchus-Scorpius complex
(e.g., Leiendecker et al. 2022, Bohn et al. 2022, Bouvier et al. 2020).
It is composed of a protostar surrounded by a pre-transitional disc,
which has a large central cavity. The origin of the cavity is unknown
— it can be either created by an unknown planet, a pressure ‘bump’,
dust accumulation, or by dust condensation. To understand it, one
needs a suitable model of the disk.

The system has been observed by Atacama Large Milimeter/sub-milimeter Array
(ALMA). A preliminary reduction of ALMA data was already done with help
of the CASA and CARTA packages. Apart from Fourier imaging, the underlying
interferometric visibilities were extracted, which is the basic quantity
measured by radio, sub-mm, or optical interferometers. Additional data
are available in the ESO archive (archive.eso.org), for example, optical
interferometry from VLTI/GRAVITY, spectral line profiles from VLTI/Xshooter,
or SED.

This thesis aims to create a kinematic model for the disk. Key goals include
determining the dimensions, geometry, physical conditions within the disk and
investigating the presence of dusty rings, stellar winds, and accretion flows.
A possible continuity of the gas density profile across the disk will be explored.

For radiative-transfer computations, the Pyshellspec model (Budaj 2011,
Mourard et al. 2018, Brož et al., 2021) will be employed. It allows to compute
interferometric observables (V^2, |T_3|, arg T_3), spectra, or absolute fluxes.
Because this model was originally designed for hot circum-stellar environments,
it is necessary to modify it, e.g., by using opacities suitable for
cold environments. The suggested methods collectively provide a comprehensive
approach to understanding protoplanetary disks.

Seznam odborné literatury

Leiendecker, H. et al.: Dust rings and cavities in the protoplanetary disks around HD 163296 and DoAr 44. Astrophys. J. 941, 2, 172, 2022.

Bohn, A. J. et al.: Probing inner and outer disk misalignments in transition disks. Constraints from VLTI/GRAVITY and ALMA observations. Astron. Astrophys. 658, A183, 2022.

Bouvier, J. et al.: Investigating the magnetospheric accretion process in the young pre-transitional disk system DoAr 44 (V2062 Oph). A multiwavelength interferometric, spectropolarimetric, and photometric observing campaign. Astron. Astrophys. 643, A99, 2020.

Budaj, J.: The reflection effect in interacting binaries or in planet-star systems. Astron. J. 141, 2, 59, 2011.

Mourard, D. et al.: Physical properties of β Lyrae A and its opaque accretion disk. Astron. Astrophys. 618, A112, 2018.

Brož, M. et al.: Optically thin circumstellar medium in the β Lyr A system. Astron. Astrophys. 645, A51, 2021.

Předběžná náplň práce

TBD.

Předběžná náplň práce v anglickém jazyce

TBD.