JWST/NIRCam imaging of PDS 70 - A spiral accretion stream feeding PDS 70 c
- Author(s)
- Valentin Christiaens, Matthias Samland, Th. Henning, B. Portilla-Revelo, Giulia Perotti, E. C. Matthews, Olivier Absil, Leen Decin, Anthony Boccaletti, Benoit Tabone, G. D. Marleau, Ewine Fleur van Dishoeck, Manuel Güdel, Pierre-Olivier Lagage, David Barrado, Alessio Caratti O. Garatti, Adrian Michael Glauser, Göran Olofsson, Tom P. Ray, Silvia Scheithauer, Bart Vandenbussche, L. B. F. M. Waters, Aditya M. Arabhavi, Sierra L. Grant, Hyerin Jang, Jayatee Kanwar, Jürgen Schreiber, Kamber Schwarz, Milou Temmink, Göran Östlin
- Abstract
Two protoplanets have been discovered within the protoplanetary disk of PDS 70 using ground-based facilities. JWST now offers a unique opportunity to characterize them at wavelengths inaccessible or difficult to observe from the ground. In this contribution, I will present our results obtained in two different NIRCam filters, F187N (1.87µm) and F480M (4.8µm) on the iconic PDS 70 system, as part of the MIRI GTO on protoplanetary disks. I will explain the new iterative algorithm that we developed and applied to the data for unbiased imaging of circumstellar signals. I will then present and discuss our new images. Apart from the known protoplanets, we identify a spiral-shaped signal which we interpret as the spiral accretion stream feeding planet c and its circumplanetary disk. We also observe an additional source adjacent to the inner disk which appears roughly consistent with the protoplanet candidate proposed in Mesa et al. (2019). I will also compare the NIRCam photometry extracted for protoplanets b and c to existing constraints gathered from the ground, and show that the 4.8µm measurement suggest some additional emission from the circumplanetary environment of the protoplanets. Our data set upper limits on Pa-alpha emission for protoplanet b, while the tentative Pa-alpha emission we measured for protoplanet c requires follow-up dedicated observations for confirmation.
- Organisation(s)
- Department of Astrophysics
- External organisation(s)
- Université de Liège, Katholieke Universiteit Leuven, Max-Planck-Institut für Astronomie, University of Groningen, Université de recherche Paris Sciences et Lettres, Université Paris XI - Paris-Sud, Universität Duisburg-Essen, Eberhard Karls Universität Tübingen, Universität Bern, Leiden University, Max-Planck-Institut für extraterrestrische Physik, Université Paris Saclay, Centro de Astrobiología (CSIC-INTA), INAF Astronomical Observatory of Capodimonte , Dublin Institute for Advanced Studies, Eidgenössische Technische Hochschule Zürich, Stockholm University, University of Dublin, SRON Netherlands Institute for Space Research , Radboud University, Österreichische Akademie der Wissenschaften (ÖAW), Technische Universität Graz, Oskar Klein Centre, AlbaNova University Centre
- Publication date
- 07-2024
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 103003 Astronomy, 103004 Astrophysics
- Portal url
- https://ucrisportal.univie.ac.at/en/publications/624bbfd3-ffd3-463c-809c-d6d4b2c485f2