TY - JOUR
T1 - Confirmation and Keplerian motion of the gap-carving protoplanet HD 169142 b
AU - Hammond, Iain
AU - Christiaens, Valentin
AU - Price, Daniel J.
AU - Toci, Claudia
AU - Pinte, Christophe
AU - Juillard, Sandrine
AU - Garg, Himanshi
N1 - Funding Information:
We thank Myriam Benisty and Roxanne Ligi for useful discussions. IH acknowledges a Research Training Program scholarship from the Australian Government. IH, DP, CP, and HG acknowledge the Australian Research Council funding via DP180104235. VC acknowledges a post-doctoral fellowship from the Belgian F.R.S.FNRS. CT acknowledges the European Union’s Horizon 2020 research and innovation programme, Marie Sklodowska Curie grant agreement number 823823 (DUSTBUSTERS RISE project). We made use of the Multi-modal Australian ScienceS Imaging and Visualization Environment (MASSIVE) (www.massive.org.au) and data from the European Space Agency (ESA) mission Gaia.
Publisher Copyright:
© 2023 Oxford University Press. All rights reserved.
PY - 2023/6
Y1 - 2023/6
N2 - We present the re-detection of a compact source in the face-on protoplanetary disc surrounding HD 169142, using VLT/SPHERE data in YJH bands. The source is found at a separation of 0̷̷ . 319 (∼37 au) from the star. Three lines of evidence argue in favour of the signal tracing a protoplanet: (i) it is found in the annular gap separating the two bright rings of the disc, as predicted by theory; (ii) it is moving at the expected Keplerian velocity for an object at ∼37 au in the 2015, 2017, and 2019 data sets; and (iii) we also detect a spiral-shaped signal whose morphology is consistent with the expected outer spiral wake triggered by a planet in the gap, based on dedicated hydrodynamical simulations of the system. The YJH colours we extracted for the object are consistent with tracing scattered starlight, suggesting that the protoplanet is enshrouded in a significant amount of dust, as expected for a circumplanetary disc or envelope surrounding a gap-clearing Jovian-mass protoplanet.
AB - We present the re-detection of a compact source in the face-on protoplanetary disc surrounding HD 169142, using VLT/SPHERE data in YJH bands. The source is found at a separation of 0̷̷ . 319 (∼37 au) from the star. Three lines of evidence argue in favour of the signal tracing a protoplanet: (i) it is found in the annular gap separating the two bright rings of the disc, as predicted by theory; (ii) it is moving at the expected Keplerian velocity for an object at ∼37 au in the 2015, 2017, and 2019 data sets; and (iii) we also detect a spiral-shaped signal whose morphology is consistent with the expected outer spiral wake triggered by a planet in the gap, based on dedicated hydrodynamical simulations of the system. The YJH colours we extracted for the object are consistent with tracing scattered starlight, suggesting that the protoplanet is enshrouded in a significant amount of dust, as expected for a circumplanetary disc or envelope surrounding a gap-clearing Jovian-mass protoplanet.
KW - disc interactions
KW - planet
KW - protoplanetary discs
KW - stars: individual: HD 169142
UR - https://www.scopus.com/pages/publications/85160421466
U2 - 10.1093/mnrasl/slad027
DO - 10.1093/mnrasl/slad027
M3 - Article
AN - SCOPUS:85160421466
SN - 1745-3925
VL - 522
SP - L51-L55
JO - Monthly Notices of the Royal Astronomical Society: Letters
JF - Monthly Notices of the Royal Astronomical Society: Letters
IS - 1
ER -