The Search for the In-betweeners: How Packed Are TESS Planetary Systems?
In this work, we examine seven systems discovered by TESS, to see whether there is any room in those systems for an additional planet (or several) to lurk unseen between the two planets already confirmed therein. In five of those systems (namely, HD 15337, HD 21749, HD 63433, HD 73583, and LTT 3780)...
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IOP Publishing
2024-01-01
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| Series: | The Astronomical Journal |
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| Online Access: | https://doi.org/10.3847/1538-3881/ad8e3a |
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| author | Jonathan Horner Robert A. Wittenmyer Stephen R. Kane Timothy R. Holt |
| author_facet | Jonathan Horner Robert A. Wittenmyer Stephen R. Kane Timothy R. Holt |
| author_sort | Jonathan Horner |
| collection | DOAJ |
| description | In this work, we examine seven systems discovered by TESS, to see whether there is any room in those systems for an additional planet (or several) to lurk unseen between the two planets already confirmed therein. In five of those systems (namely, HD 15337, HD 21749, HD 63433, HD 73583, and LTT 3780), we find that there is ample room for an undiscovered planet to move between those that have already been discovered. In other words, as they currently stand, those systems are not tightly packed. In stark contrast, the perturbative influence of the two known TOI-1670 planets is such that additional planets in between are ruled out. The final system, TOI 421, is more challenging. In the vast majority of cases, adding an Earth-mass planet to that system between the orbits of the known planets caused catastrophic instability. Just ∼1.1% of our simulations of the modified system proved dynamically stable on a timescale of 1 Myr. As a result, it seems that there is very little room between the two known planets in the TOI 421 system for an additional unseen world to exist, but the existence of such a planet cannot be definitely ruled out on dynamical grounds alone. |
| format | Article |
| id | doaj-art-5dbe5ff71ce94cc19f2643c863f2cdf7 |
| institution | Kabale University |
| issn | 1538-3881 |
| language | English |
| publishDate | 2024-01-01 |
| publisher | IOP Publishing |
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| series | The Astronomical Journal |
| spelling | doaj-art-5dbe5ff71ce94cc19f2643c863f2cdf72024-12-05T09:41:03ZengIOP PublishingThe Astronomical Journal1538-38812024-01-011691810.3847/1538-3881/ad8e3aThe Search for the In-betweeners: How Packed Are TESS Planetary Systems?Jonathan Horner0https://orcid.org/0000-0002-1160-7970Robert A. Wittenmyer1https://orcid.org/0000-0001-9957-9304Stephen R. Kane2https://orcid.org/0000-0002-7084-0529Timothy R. Holt3https://orcid.org/0000-0003-0437-3296Centre for Astrophysics, University of Southern Queensland , West Street, Toowoomba, QLD 4350, Australia ; jonti.horner@unisq.edu.auCentre for Astrophysics, University of Southern Queensland , West Street, Toowoomba, QLD 4350, Australia ; jonti.horner@unisq.edu.auCentre for Astrophysics, University of Southern Queensland , West Street, Toowoomba, QLD 4350, Australia ; jonti.horner@unisq.edu.au; Department of Earth and Planetary Sciences, University of California , Riverside, CA 92521, USACentre for Astrophysics, University of Southern Queensland , West Street, Toowoomba, QLD 4350, Australia ; jonti.horner@unisq.edu.auIn this work, we examine seven systems discovered by TESS, to see whether there is any room in those systems for an additional planet (or several) to lurk unseen between the two planets already confirmed therein. In five of those systems (namely, HD 15337, HD 21749, HD 63433, HD 73583, and LTT 3780), we find that there is ample room for an undiscovered planet to move between those that have already been discovered. In other words, as they currently stand, those systems are not tightly packed. In stark contrast, the perturbative influence of the two known TOI-1670 planets is such that additional planets in between are ruled out. The final system, TOI 421, is more challenging. In the vast majority of cases, adding an Earth-mass planet to that system between the orbits of the known planets caused catastrophic instability. Just ∼1.1% of our simulations of the modified system proved dynamically stable on a timescale of 1 Myr. As a result, it seems that there is very little room between the two known planets in the TOI 421 system for an additional unseen world to exist, but the existence of such a planet cannot be definitely ruled out on dynamical grounds alone.https://doi.org/10.3847/1538-3881/ad8e3aExoplanetsExoplanet dynamicsAstrobiology |
| spellingShingle | Jonathan Horner Robert A. Wittenmyer Stephen R. Kane Timothy R. Holt The Search for the In-betweeners: How Packed Are TESS Planetary Systems? The Astronomical Journal Exoplanets Exoplanet dynamics Astrobiology |
| title | The Search for the In-betweeners: How Packed Are TESS Planetary Systems? |
| title_full | The Search for the In-betweeners: How Packed Are TESS Planetary Systems? |
| title_fullStr | The Search for the In-betweeners: How Packed Are TESS Planetary Systems? |
| title_full_unstemmed | The Search for the In-betweeners: How Packed Are TESS Planetary Systems? |
| title_short | The Search for the In-betweeners: How Packed Are TESS Planetary Systems? |
| title_sort | search for the in betweeners how packed are tess planetary systems |
| topic | Exoplanets Exoplanet dynamics Astrobiology |
| url | https://doi.org/10.3847/1538-3881/ad8e3a |
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