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  Constraining the nature of the PDS 70 protoplanets with VLTI/GRAVITY

Wang, J. J., Vigan, A., Lacour, S., Nowak, M., Stolker, T., Rosa, R. J. D., et al. (2021). Constraining the nature of the PDS 70 protoplanets with VLTI/GRAVITY. Astronomical Journal, 161(3): 148. doi:10.3847/1538-3881/abdb2d.

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Wang, J. J., Author
Vigan, A., Author
Lacour, S., Author
Nowak, M., Author
Stolker, T., Author
Rosa, R. J. De, Author
Ginzburg, S., Author
Gao, P., Author
Abuter, R., Author
Amorim, A., Author
Asensio-Torres, R., Author
Bauböck, M.1, Author              
Benisty, M., Author
Berger, J. P., Author
Beust, H., Author
Beuzit, J.-L., Author
Blunt, S., Author
Boccaletti, A., Author
Bohn, A., Author
Bonnefoy, M., Author
Bonnet, H., AuthorBrandner, W., AuthorCantalloube, F., AuthorCaselli, P.2, Author              Charnay, B., AuthorChauvin, G., AuthorChoquet, E., AuthorChristiaens, V., AuthorClénet, Y., Authordu Foresto, V. Coudé, AuthorCridland, A., Authorde Zeeuw, P. T.1, Author              Dembet, R., AuthorDexter, J.1, Author              Drescher, A.1, Author              Duvert, G., AuthorEckart, A., AuthorEisenhauer, F.1, Author              Facchini, S., AuthorGao, F.1, Author              Garcia, P., AuthorLopez, R. Garcia, AuthorGardner, T., AuthorGendron, E., AuthorGenzel, R.1, Author              Gillessen, S.1, Author              Girard, J., AuthorHaubois, X., AuthorHeißel, G., AuthorHenning, T., AuthorHinkley, S., AuthorHippler, S., AuthorHorrobin, M., AuthorHoullé, M., AuthorHubert, Z., AuthorJiménez-Rosales, A.1, Author              Jocou, L., AuthorKammerer, J., AuthorKeppler, M., AuthorKervella, P., AuthorMeyer, M., AuthorKreidberg, L., AuthorLagrange, A.-M., AuthorLapeyrère, V., AuthorLe Bouquin, J.-B., AuthorLéna, P., AuthorLutz, D.1, Author              Maire, A.-L., AuthorMénard, F., AuthorMérand, A., AuthorMollière, P., AuthorMonnier, J. D., AuthorMouillet, D., AuthorMüller, A., AuthorNasedkin, E., AuthorOtt, T.1, Author              Otten, G. P. P. L., AuthorPaladini, C., AuthorPaumard, T., AuthorPerraut, K., AuthorPerrin, G., AuthorPfuhl, O., AuthorPueyo, L., AuthorRameau, J., AuthorRodet, L., AuthorRodríguez-Coira, G., AuthorRousset, G., AuthorScheithauer, S., AuthorShangguan, J.1, Author              Shimizu, T.1, Author              Stadler, J.1, Author              Straub, O.1, Author              Straubmeier, C., AuthorSturm, E.1, Author              Tacconi, L. J.1, Author              Dishoeck, E. F. van1, Author              Vincent, F., AuthorFellenberg, S. D. von1, Author              Ward-Duong, K., AuthorWidmann, F.1, Author              Wieprecht, E.1, Author              Wiezorrek, E.1, Author              Woillez, J., Author more..
Affiliations:
1Infrared and Submillimeter Astronomy, MPI for Extraterrestrial Physics, Max Planck Society, ou_159889              
2Center for Astrochemical Studies at MPE, MPI for Extraterrestrial Physics, Max Planck Society, ou_1950287              

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 Abstract: 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 μas 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 MJup, 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 μm 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.

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 Dates: 2021-02-25
 Publication Status: Published online
 Pages: -
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 Rev. Type: -
 Identifiers: DOI: 10.3847/1538-3881/abdb2d
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Title: Astronomical Journal
  Other : Astron. J.
Source Genre: Journal
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Publ. Info: Chicago : Published by the University of Chicago Press for the American Astronomical Society
Pages: - Volume / Issue: 161 (3) Sequence Number: 148 Start / End Page: - Identifier: ISSN: 0004-6256
CoNE: https://pure.mpg.de/cone/journals/resource/954922828207