Constraining the Nature of the PDS 70 Protoplanets with VLTI/GRAVITY*

• Type: Article in International Scientific Journal
• Date: 2021

Authors

Otten, GPPL (Author) Other; Paladini, C (Author) Other; Paumard, T (Author) Other; Perraut, K (Author) Other; Perrin, G (Author) Other; Pfuhl, O (Author) Other; Pueyo, L (Author) Other; Rameau, J (Author) Other; Rodet, L (Author) Other; Rodriguez Coira, G (Author) Other; Rousset, G (Author) Other; Scheithauer, S (Author) Other; Shangguan, J (Author) Other; Shimizu, T (Author) Other; Stadler, J (Author) Other; Straub, O (Author) Other; Straubmeier, C (Author) Other; Sturm, E (Author) Other; Tacconi, LJ (Author) Other; van Dishoeck, EF (Author) Other; Vincent, F (Author) Other; von Fellenberg, SD (Author) Other; Ward Duong, K (Author) Other; Widmann, F (Author) Other; Wieprecht, E (Author) Other; Wiezorrek, E (Author) Other; Woillez, J (Author) Other; Wang, JJ (Author) Other; Vigan, A (Author) Other; Lacour, S (Author) Other; Nowak, M (Author) Other; Stolker, T (Author) Other; De Rosa, RJ (Author) Other; Ginzburg, S (Author) Other; Gao, P (Author) Other; Abuter, R (Author) Other; Amorim, A (Author) Other; Asensio Torres, R (Author) Other; Baubock, M (Author) Other; Benisty, M (Author) Other; Berger, JP (Author) Other; Beust, H (Author) Other; Beuzit, JL (Author) Other; Blunt, S (Author) Other; Boccaletti, A (Author) Other; Bohn, A (Author) Other; Bonnefoy, M (Author) Other; Bonnet, H (Author) Other; Brandner, W (Author) Other; Cantalloube, F (Author) Other; Caselli, P (Author) Other; Charnay, B (Author) Other; Chauvin, G (Author) Other; Choquet, E (Author) Other; Christiaens, V (Author) Other; Clenet, Y (Author) Other; du Foresto, VC (Author) Other; Cridland, A (Author) Other; de Zeeuw, PT (Author) Other; Dembet, R (Author) Other; Dexter, J (Author) Other; Drescher, A (Author) Other; Duvert, G (Author) Other; Eckart, A (Author) Other; Eisenhauer, F (Author) Other; Facchini, S (Author) Other; Gao, F (Author) Other; P. J. V. Garcia (Author) FEUP; Lopez, RG (Author) Other; Gardner, T (Author) Other; Gendron, E (Author) Other; Genzel, R (Author) Other; Gillessen, S (Author) Other; Girard, J (Author) Other; Haubois, X (Author) Other; Heissel, G (Author) Other; Henning, T (Author) Other; Hinkley, S (Author) Other; Hippler, S (Author) Other; Horrobin, M (Author) Other; Houlle, M (Author) Other; Hubert, Z (Author) Other; Jimenez Rosales, A (Author) Other; Jocou, L (Author) Other; Kammerer, J (Author) Other; Keppler, M (Author) Other; Kervella, P (Author) Other; Meyer, M (Author) Other; Kreidberg, L (Author) Other; Lagrange, AM (Author) Other; Lapeyrere, V (Author) Other; Le Bouquin, JB (Author) Other; Lena, P (Author) Other; Lutz, D (Author) Other; Maire, AL (Author) Other; Menard, F (Author) Other; Merand, A (Author) Other; Molliere, P (Author) Other; Monnier, JD (Author) Other; Mouillet, D (Author) Other; Muller, A (Author) Other; Nasedkin, E (Author) Other; Ott, T (Author) Other

Journal

Title: Astronomical Journal

Vol. 161

Final page: 148

ISSN: 0004-6256

Publisher: American Astronomical Society

Indexing

ISI Web of Knowledge - 0 Citations

Scopus - 4 Citations

Other information

Authenticus ID: P-00T-KJ5

DOI: 10.3847/1538-3881/abdb2d

Abstract (EN): We present K-band interferometric observations of the PDS 70 protoplanets along with their host star using VLTI/GRAVITY. We obtained K-band spectra and 100 mu as precision astrometry of both PDS 70 b and c in two epochs, as well as spatially resolving the hot inner disk around the star. Rejecting unstable orbits, we found a nonzero eccentricity for PDS 70 b of 0.17 0.06, a near-circular orbit for PDS 70 c, and an orbital configuration that is consistent with the planets migrating into a 2:1 mean motion resonance. Enforcing dynamical stability, we obtained a 95% upper limit on the mass of PDS 70 b of 10 M-Jup, while the mass of PDS 70 c was unconstrained. The GRAVITY K-band spectra rules out pure blackbody models for the photospheres of both planets. Instead, the models with the most support from the data are planetary atmospheres that are dusty, but the nature of the dust is unclear. Any circumplanetary dust around these planets is not well constrained by the planets' 1-5 mu m spectral energy distributions (SEDs) and requires longer wavelength data to probe with SED analysis. However with VLTI/GRAVITY, we made the first observations of a circumplanetary environment with sub-astronomical-unit spatial resolution, placing an upper limit of 0.3 au on the size of a bright disk around PDS 70 b.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 22