HD 28109 hosts a trio of transiting Neptunian planets including a near-resonant pair, confirmed by ASTEP from Antarctica
We report on the disco v ery and characterization of three planets orbiting the F8 star HD 28109, which sits comfortably in TESS ’s continuous viewing zone. The two outer planets have periods of 56 . 0067 ±0 . 0003 d and 84 . 2597 + 0 . 0010 −0 . 0008 d, which implies a period ratio very close to th...
Published in: | Monthly Notices of the Royal Astronomical Society |
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Oxford University Press
2022
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Online Access: | http://hdl.handle.net/10481/76580 https://doi.org/10.1093/mnras/stac1383 |
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ftunivgranada:oai:digibug.ugr.es:10481/76580 2023-05-15T13:35:02+02:00 HD 28109 hosts a trio of transiting Neptunian planets including a near-resonant pair, confirmed by ASTEP from Antarctica Dransfield, Georgina Dévora Pajares, Martín Lissauer, Jack J. 2022-07-22 http://hdl.handle.net/10481/76580 https://doi.org/10.1093/mnras/stac1383 eng eng Oxford University Press info:eu-repo/grantAgreement/EC/H2020/803193 Georgina Dransfield. [et al.]. HD 28109 hosts a trio of transiting Neptunian planets including a near-resonant pair, confirmed by ASTEP from Antarctica, Monthly Notices of the Royal Astronomical Society, Volume 515, Issue 1, September 2022, Pages 1328–1345, [https://doi.org/10.1093/mnras/stac1383] http://hdl.handle.net/10481/76580 doi:10.1093/mnras/stac1383 Attribution-NonCommercial-NoDerivatives 4.0 Internacional http://creativecommons.org/licenses/by-nc-nd/4.0/ info:eu-repo/semantics/openAccess CC-BY-NC-ND Planets and satellites: detection Planets and satellites: dynamical evolution and stability Planets and satellites: fundamental parameters info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2022 ftunivgranada https://doi.org/10.1093/mnras/stac1383 2022-10-25T23:23:36Z We report on the disco v ery and characterization of three planets orbiting the F8 star HD 28109, which sits comfortably in TESS ’s continuous viewing zone. The two outer planets have periods of 56 . 0067 ±0 . 0003 d and 84 . 2597 + 0 . 0010 −0 . 0008 d, which implies a period ratio very close to that of the first-order 3:2 mean motion resonance, exciting transit timing variations (TTVs) of up to 60 min. These two planets were first identified by TESS , and we identified a third planet in the TESS photometry with a period of 22 . 8911 ±0 . 0004 d. We confirm the planetary nature of all three planetary candidates using ground-based photometry from Hazelwood , ASTEP , and LCO , including a full detection of the ∼9 h transit of HD 28109 c from Antarctica. The radii of the three planets are R b = 2 . 199 + 0 . 098 −0 . 10 R ⊕, R c = 4 . 23 ±0 . 11 R ⊕, and R d = 3 . 25 ±0 . 11 R ⊕; we characterize their masses using TTVs and precise radial velocities from ESPRESSO and HARPS, and find them to be M b = 18 . 5 + 9 . 1 −7 . 6 M ⊕, M c = 7 . 9 + 4 . 2 −3 . 0 M ⊕, and M d = 5 . 7 + 2 . 7 −2 . 1 M ⊕, making planet b a dense, massive planet while c and d are both underdense. We also demonstrate that the two outer planets are ripe for atmospheric characterization using transmission spectroscopy, especially given their position in the CVZ of James Webb Space Telescope . The data obtained to date are consistent with resonant (librating) and non-resonant (circulating) solutions; additional observations will show whether the pair is actually locked in resonance or just near-resonant. French polar agency IPEV ANR-15-IDEX-01 French polar agency PNRA ANR-15-IDEX-01 Italian polar agency IPEV ANR-15-IDEX-01 Italian polar agency PNRA ANR-15-IDEX-01 NASA Exoplanet Exploration Program NASA's Science Mission Directorate European Organisation for Astronomical Research in the Southern Hemisphere 0102.C-0503(A) National Science Foundation (NSF) European Space Agency European Commission Swiss National Science Foundation (SNSF) ... Article in Journal/Newspaper Antarc* Antarctica DIGIBUG: Repositorio Institucional de la Universidad de Granada Webb ENVELOPE(146.867,146.867,-67.867,-67.867) Monthly Notices of the Royal Astronomical Society 515 1 1328 1345 |
institution |
Open Polar |
collection |
DIGIBUG: Repositorio Institucional de la Universidad de Granada |
op_collection_id |
ftunivgranada |
language |
English |
topic |
Planets and satellites: detection Planets and satellites: dynamical evolution and stability Planets and satellites: fundamental parameters |
spellingShingle |
Planets and satellites: detection Planets and satellites: dynamical evolution and stability Planets and satellites: fundamental parameters Dransfield, Georgina Dévora Pajares, Martín Lissauer, Jack J. HD 28109 hosts a trio of transiting Neptunian planets including a near-resonant pair, confirmed by ASTEP from Antarctica |
topic_facet |
Planets and satellites: detection Planets and satellites: dynamical evolution and stability Planets and satellites: fundamental parameters |
description |
We report on the disco v ery and characterization of three planets orbiting the F8 star HD 28109, which sits comfortably in TESS ’s continuous viewing zone. The two outer planets have periods of 56 . 0067 ±0 . 0003 d and 84 . 2597 + 0 . 0010 −0 . 0008 d, which implies a period ratio very close to that of the first-order 3:2 mean motion resonance, exciting transit timing variations (TTVs) of up to 60 min. These two planets were first identified by TESS , and we identified a third planet in the TESS photometry with a period of 22 . 8911 ±0 . 0004 d. We confirm the planetary nature of all three planetary candidates using ground-based photometry from Hazelwood , ASTEP , and LCO , including a full detection of the ∼9 h transit of HD 28109 c from Antarctica. The radii of the three planets are R b = 2 . 199 + 0 . 098 −0 . 10 R ⊕, R c = 4 . 23 ±0 . 11 R ⊕, and R d = 3 . 25 ±0 . 11 R ⊕; we characterize their masses using TTVs and precise radial velocities from ESPRESSO and HARPS, and find them to be M b = 18 . 5 + 9 . 1 −7 . 6 M ⊕, M c = 7 . 9 + 4 . 2 −3 . 0 M ⊕, and M d = 5 . 7 + 2 . 7 −2 . 1 M ⊕, making planet b a dense, massive planet while c and d are both underdense. We also demonstrate that the two outer planets are ripe for atmospheric characterization using transmission spectroscopy, especially given their position in the CVZ of James Webb Space Telescope . The data obtained to date are consistent with resonant (librating) and non-resonant (circulating) solutions; additional observations will show whether the pair is actually locked in resonance or just near-resonant. French polar agency IPEV ANR-15-IDEX-01 French polar agency PNRA ANR-15-IDEX-01 Italian polar agency IPEV ANR-15-IDEX-01 Italian polar agency PNRA ANR-15-IDEX-01 NASA Exoplanet Exploration Program NASA's Science Mission Directorate European Organisation for Astronomical Research in the Southern Hemisphere 0102.C-0503(A) National Science Foundation (NSF) European Space Agency European Commission Swiss National Science Foundation (SNSF) ... |
format |
Article in Journal/Newspaper |
author |
Dransfield, Georgina Dévora Pajares, Martín Lissauer, Jack J. |
author_facet |
Dransfield, Georgina Dévora Pajares, Martín Lissauer, Jack J. |
author_sort |
Dransfield, Georgina |
title |
HD 28109 hosts a trio of transiting Neptunian planets including a near-resonant pair, confirmed by ASTEP from Antarctica |
title_short |
HD 28109 hosts a trio of transiting Neptunian planets including a near-resonant pair, confirmed by ASTEP from Antarctica |
title_full |
HD 28109 hosts a trio of transiting Neptunian planets including a near-resonant pair, confirmed by ASTEP from Antarctica |
title_fullStr |
HD 28109 hosts a trio of transiting Neptunian planets including a near-resonant pair, confirmed by ASTEP from Antarctica |
title_full_unstemmed |
HD 28109 hosts a trio of transiting Neptunian planets including a near-resonant pair, confirmed by ASTEP from Antarctica |
title_sort |
hd 28109 hosts a trio of transiting neptunian planets including a near-resonant pair, confirmed by astep from antarctica |
publisher |
Oxford University Press |
publishDate |
2022 |
url |
http://hdl.handle.net/10481/76580 https://doi.org/10.1093/mnras/stac1383 |
long_lat |
ENVELOPE(146.867,146.867,-67.867,-67.867) |
geographic |
Webb |
geographic_facet |
Webb |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_relation |
info:eu-repo/grantAgreement/EC/H2020/803193 Georgina Dransfield. [et al.]. HD 28109 hosts a trio of transiting Neptunian planets including a near-resonant pair, confirmed by ASTEP from Antarctica, Monthly Notices of the Royal Astronomical Society, Volume 515, Issue 1, September 2022, Pages 1328–1345, [https://doi.org/10.1093/mnras/stac1383] http://hdl.handle.net/10481/76580 doi:10.1093/mnras/stac1383 |
op_rights |
Attribution-NonCommercial-NoDerivatives 4.0 Internacional http://creativecommons.org/licenses/by-nc-nd/4.0/ info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY-NC-ND |
op_doi |
https://doi.org/10.1093/mnras/stac1383 |
container_title |
Monthly Notices of the Royal Astronomical Society |
container_volume |
515 |
container_issue |
1 |
container_start_page |
1328 |
op_container_end_page |
1345 |
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1766060361143812096 |