HD 28109 hosts a trio of transiting Neptunian planets including a near-resonant pair, confirmed by ASTEP from Antarctica
ABSTRACT We report on the discovery 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 $\rm 56.0067 \pm 0.0003~d$ and $\rm 84.2597_{-0.0008}^{+0.0010}~d$, which implies a period rati...
Published in: | Monthly Notices of the Royal Astronomical Society |
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Oxford University Press (OUP)
2022
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Online Access: | http://dx.doi.org/10.1093/mnras/stac1383 https://academic.oup.com/mnras/advance-article-pdf/doi/10.1093/mnras/stac1383/43800388/stac1383.pdf https://academic.oup.com/mnras/article-pdf/515/1/1328/45048866/stac1383.pdf |
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croxfordunivpr:10.1093/mnras/stac1383 2024-06-23T07:47:07+00:00 HD 28109 hosts a trio of transiting Neptunian planets including a near-resonant pair, confirmed by ASTEP from Antarctica Dransfield, Georgina Triaud, Amaury H M J Guillot, Tristan Mekarnia, Djamel Nesvorný, David Crouzet, Nicolas Abe, Lyu Agabi, Karim Buttu, Marco Cabrera, Juan Gandolfi, Davide Günther, Maximilian N Rodler, Florian Schmider, François-Xavier Stee, Philippe Suarez, Olga Collins, Karen A Dévora-Pajares, Martín Howell, Steve B Matthews, Elisabeth C Standing, Matthew R Stassun, Keivan G Stockdale, Chris Quinn, Samuel N Ziegler, Carl Crossfield, Ian J M Lissauer, Jack J Mann, Andrew W Matson, Rachel Schlieder, Joshua Zhou, George NASA National Science Foundation National Research Council Canada Ministério da Ciência, Tecnologia, Inovações e Comunicações Korea Astronomy and Space Science Institute European Space Agency ESO MSIP Swiss National Science Foundation European Research Council Science and Technology Facilities Council CRT 2022 http://dx.doi.org/10.1093/mnras/stac1383 https://academic.oup.com/mnras/advance-article-pdf/doi/10.1093/mnras/stac1383/43800388/stac1383.pdf https://academic.oup.com/mnras/article-pdf/515/1/1328/45048866/stac1383.pdf en eng Oxford University Press (OUP) https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model Monthly Notices of the Royal Astronomical Society volume 515, issue 1, page 1328-1345 ISSN 0035-8711 1365-2966 journal-article 2022 croxfordunivpr https://doi.org/10.1093/mnras/stac1383 2024-06-11T04:22:10Z ABSTRACT We report on the discovery 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 $\rm 56.0067 \pm 0.0003~d$ and $\rm 84.2597_{-0.0008}^{+0.0010}~d$, 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 $\rm 60\, min$. These two planets were first identified by ${TESS}$, and we identified a third planet in the ${TESS}$photometry with a period of $\rm 22.8911 \pm 0.0004~d$. 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 $\rm \sim 9\, h$ transit of HD 28109 c from Antarctica. The radii of the three planets are ${\it R}_b=2.199_{-0.10}^{+0.098} ~{\rm R}_{\oplus }$, ${\it R}_c=4.23\pm 0.11~ {\rm R}_{\oplus }$, and ${\it R}_d=3.25\pm 0.11 ~{\rm R}_{\oplus }$; we characterize their masses using TTVs and precise radial velocities from ESPRESSO and HARPS, and find them to be ${\it M}_b=18.5_{-7.6}^{+9.1}~M_{\oplus }$, ${\it M}_c=7.9_{-3.0}^{+4.2}~{\rm M}_{\oplus }$, and ${\it M}_d=5.7_{-2.1}^{+2.7}~{\rm M}_{\oplus }$, 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. Article in Journal/Newspaper Antarc* Antarctica Oxford University Press Webb ENVELOPE(146.867,146.867,-67.867,-67.867) Monthly Notices of the Royal Astronomical Society |
institution |
Open Polar |
collection |
Oxford University Press |
op_collection_id |
croxfordunivpr |
language |
English |
description |
ABSTRACT We report on the discovery 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 $\rm 56.0067 \pm 0.0003~d$ and $\rm 84.2597_{-0.0008}^{+0.0010}~d$, 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 $\rm 60\, min$. These two planets were first identified by ${TESS}$, and we identified a third planet in the ${TESS}$photometry with a period of $\rm 22.8911 \pm 0.0004~d$. 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 $\rm \sim 9\, h$ transit of HD 28109 c from Antarctica. The radii of the three planets are ${\it R}_b=2.199_{-0.10}^{+0.098} ~{\rm R}_{\oplus }$, ${\it R}_c=4.23\pm 0.11~ {\rm R}_{\oplus }$, and ${\it R}_d=3.25\pm 0.11 ~{\rm R}_{\oplus }$; we characterize their masses using TTVs and precise radial velocities from ESPRESSO and HARPS, and find them to be ${\it M}_b=18.5_{-7.6}^{+9.1}~M_{\oplus }$, ${\it M}_c=7.9_{-3.0}^{+4.2}~{\rm M}_{\oplus }$, and ${\it M}_d=5.7_{-2.1}^{+2.7}~{\rm M}_{\oplus }$, 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. |
author2 |
NASA National Science Foundation National Research Council Canada Ministério da Ciência, Tecnologia, Inovações e Comunicações Korea Astronomy and Space Science Institute European Space Agency ESO MSIP Swiss National Science Foundation European Research Council Science and Technology Facilities Council CRT |
format |
Article in Journal/Newspaper |
author |
Dransfield, Georgina Triaud, Amaury H M J Guillot, Tristan Mekarnia, Djamel Nesvorný, David Crouzet, Nicolas Abe, Lyu Agabi, Karim Buttu, Marco Cabrera, Juan Gandolfi, Davide Günther, Maximilian N Rodler, Florian Schmider, François-Xavier Stee, Philippe Suarez, Olga Collins, Karen A Dévora-Pajares, Martín Howell, Steve B Matthews, Elisabeth C Standing, Matthew R Stassun, Keivan G Stockdale, Chris Quinn, Samuel N Ziegler, Carl Crossfield, Ian J M Lissauer, Jack J Mann, Andrew W Matson, Rachel Schlieder, Joshua Zhou, George |
spellingShingle |
Dransfield, Georgina Triaud, Amaury H M J Guillot, Tristan Mekarnia, Djamel Nesvorný, David Crouzet, Nicolas Abe, Lyu Agabi, Karim Buttu, Marco Cabrera, Juan Gandolfi, Davide Günther, Maximilian N Rodler, Florian Schmider, François-Xavier Stee, Philippe Suarez, Olga Collins, Karen A Dévora-Pajares, Martín Howell, Steve B Matthews, Elisabeth C Standing, Matthew R Stassun, Keivan G Stockdale, Chris Quinn, Samuel N Ziegler, Carl Crossfield, Ian J M Lissauer, Jack J Mann, Andrew W Matson, Rachel Schlieder, Joshua Zhou, George HD 28109 hosts a trio of transiting Neptunian planets including a near-resonant pair, confirmed by ASTEP from Antarctica |
author_facet |
Dransfield, Georgina Triaud, Amaury H M J Guillot, Tristan Mekarnia, Djamel Nesvorný, David Crouzet, Nicolas Abe, Lyu Agabi, Karim Buttu, Marco Cabrera, Juan Gandolfi, Davide Günther, Maximilian N Rodler, Florian Schmider, François-Xavier Stee, Philippe Suarez, Olga Collins, Karen A Dévora-Pajares, Martín Howell, Steve B Matthews, Elisabeth C Standing, Matthew R Stassun, Keivan G Stockdale, Chris Quinn, Samuel N Ziegler, Carl Crossfield, Ian J M Lissauer, Jack J Mann, Andrew W Matson, Rachel Schlieder, Joshua Zhou, George |
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 (OUP) |
publishDate |
2022 |
url |
http://dx.doi.org/10.1093/mnras/stac1383 https://academic.oup.com/mnras/advance-article-pdf/doi/10.1093/mnras/stac1383/43800388/stac1383.pdf https://academic.oup.com/mnras/article-pdf/515/1/1328/45048866/stac1383.pdf |
long_lat |
ENVELOPE(146.867,146.867,-67.867,-67.867) |
geographic |
Webb |
geographic_facet |
Webb |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_source |
Monthly Notices of the Royal Astronomical Society volume 515, issue 1, page 1328-1345 ISSN 0035-8711 1365-2966 |
op_rights |
https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model |
op_doi |
https://doi.org/10.1093/mnras/stac1383 |
container_title |
Monthly Notices of the Royal Astronomical Society |
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1802651089763303424 |