Document Type
Article
Publication Date
9-21-2022
Publication Title
Astronomy & Astrophysics
First page number:
1
Last page number:
22
Abstract
Planets that are forming around young stars are expected to leave clear imprints in the distribution of the gas and dust of their parental protoplanetary disks. In this paper, we present new scattered light and millimeter observations of the protoplanetary disk around LkH 330, using SPHERE/VLT and ALMA, respectively. The scattered-light SPHERE observations reveal an asymmetric ring at around 45au from the star in addition to two spiral arms with similar radial launching points at around 90au. The millimeter observations from ALMA (resolution of 006 004 ) mainly show an asymmetric ring located at 110au from the star. In addition to this asymmetry, there are two faint symmetric rings at 60au and 200au. The 12CO, 13CO, and C18O lines seem to be less abundant in the inner disk (these observations have a resolution of 016 011 ). The 13CO peaks at a location similar to the inner ring observed with SPHERE, suggesting that this line is optically thick and traces variations of disk temperature instead of gas surface-density variations, while the C18O peaks slightly further away at around 60au. We compare our observations with hydrodynamical simulations that include gas and dust evolution, and conclude that a 10 MJup mass planet at 60au and in an eccentric orbit (e = 01) can qualitatively explain most of the observed structures. A planet in a circular orbit leads to a much narrower concentration in the millimeter emission, while a planet in a more eccentric orbit leads to a very eccentric cavity as well. In addition, the outer spiral arm launched by the planet changes its pitch angle along the spiral due to the eccentricity and when it interacts with the vortex, potentially appearing in observations as two distinct spirals. Our observations and models show that LkH 330 is an interesting target to search for (eccentric-) planets while they are still embedded in their parental disk, making it an excellent candidate for studies on planet-disk interaction.
Keywords
Planets and satellites:formation; circumstellar matter; planet-disk interactions; protoplanetary disks
Disciplines
Astrophysics and Astronomy
File Format
File Size
4500 KB
Language
English
Rights
IN COPYRIGHT. For more information about this rights statement, please visit http://rightsstatements.org/vocab/InC/1.0/
Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.
Repository Citation
Pinilla, P.,
Benisty, M.,
Kurtovic, N. T.,
Bae, J.,
Dong, R.,
Zhu, Z.,
Andrews, S.,
Carpenter, J.,
Ginski, C.,
Huang, J.,
Isella, A.,
Perez, L.,
Ricci, L.,
Rosotti, G.,
Villenave, M.,
Wilner, D.
(2022).
Distributions of Gas and Small and Large Grains in the LkH 330 Disk Trace a Young Planetary System.
Astronomy & Astrophysics
1-22.
http://dx.doi.org/10.1051/0004-6361/202243704