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| Format: | Preprint |
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2024
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| Online Access: | https://arxiv.org/abs/2407.21167 |
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| _version_ | 1866929444052008960 |
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| author | Dai, Fei Howard, Andrew W. Halverson, Samuel Orell-Miquel, Jaume Palle, Enric Isaacson, Howard Fulton, Benjamin Price, Ellen M. Plotnykov, Mykhaylo Rogers, Leslie A. Valencia, Diana Paragas, Kimberly Greklek-McKeon, Michael Barrientos, Jonathan Gomez Knutson, Heather A. Petigura, Erik A. Weiss, Lauren M. Lee, Rena Brinkman, Casey L. Huber, Daniel Steffansson, Gudmundur Masuda, Kento Giacalone, Steven Lu, Cicero X. Kite, Edwin S. Hu, Renyu Gaidos, Eric Zhang, Michael Rubenzahl, Ryan A. Winn, Joshua N. Han, Te Beard, Corey Holcomb, Rae Householder, Aaron Gilbert, Gregory J. Lubin, Jack Ong, J. M. Joel Polanski, Alex S. Saunders, Nicholas Van Zandt, Judah Yee, Samuel W. Zhang, Jingwen Zink, Jon Holden, Bradford Baker, Ashley Brodheim, Max Crossfield, Ian J. M. Deich, William Edelstein, Jerry Gibson, Steven R. Hill, Grant M. Jelinsky, Sharon R Kassis, Marc Laher, Russ R. Lanclos, Kyle Lilley, Scott Payne, Joel N. Rider, Kodi Robertson, Paul Roy, Arpita Schwab, Christian Shaum, Abby P. Sirk, Martin M. Smith, Chris Vandenberg, Adam Walawender, Josh Wang, Sharon X. Shin-Ywan Wang Wishnow, Edward Wright, Jason T. Yeh, Sherry Caballero, Jos. A. Morales, Juan C. Murgas, Felipe Nagel, Evangelos Reiners, Ansgar Schweitzer, Andreas Tabernero, Hugo M. Zechmeister, Mathias Spencer, Alton Ciardi, David R. Clark, Catherine A. Lund, Michael B. Caldwell, Douglas A. Collins, Karen A. Schwarz, Richard P. Barkaoui, Khalid Watkins, Cristilyn N. Shporer, Avi Narita, Norio Fukui, Akihiko Srdoc, Gregor Latham, David W. Jenkins, Jon M. Ricker, George R. Seager, Sara Vanderspek, Roland |
| author_facet | Dai, Fei Howard, Andrew W. Halverson, Samuel Orell-Miquel, Jaume Palle, Enric Isaacson, Howard Fulton, Benjamin Price, Ellen M. Plotnykov, Mykhaylo Rogers, Leslie A. Valencia, Diana Paragas, Kimberly Greklek-McKeon, Michael Barrientos, Jonathan Gomez Knutson, Heather A. Petigura, Erik A. Weiss, Lauren M. Lee, Rena Brinkman, Casey L. Huber, Daniel Steffansson, Gudmundur Masuda, Kento Giacalone, Steven Lu, Cicero X. Kite, Edwin S. Hu, Renyu Gaidos, Eric Zhang, Michael Rubenzahl, Ryan A. Winn, Joshua N. Han, Te Beard, Corey Holcomb, Rae Householder, Aaron Gilbert, Gregory J. Lubin, Jack Ong, J. M. Joel Polanski, Alex S. Saunders, Nicholas Van Zandt, Judah Yee, Samuel W. Zhang, Jingwen Zink, Jon Holden, Bradford Baker, Ashley Brodheim, Max Crossfield, Ian J. M. Deich, William Edelstein, Jerry Gibson, Steven R. Hill, Grant M. Jelinsky, Sharon R Kassis, Marc Laher, Russ R. Lanclos, Kyle Lilley, Scott Payne, Joel N. Rider, Kodi Robertson, Paul Roy, Arpita Schwab, Christian Shaum, Abby P. Sirk, Martin M. Smith, Chris Vandenberg, Adam Walawender, Josh Wang, Sharon X. Shin-Ywan Wang Wishnow, Edward Wright, Jason T. Yeh, Sherry Caballero, Jos. A. Morales, Juan C. Murgas, Felipe Nagel, Evangelos Reiners, Ansgar Schweitzer, Andreas Tabernero, Hugo M. Zechmeister, Mathias Spencer, Alton Ciardi, David R. Clark, Catherine A. Lund, Michael B. Caldwell, Douglas A. Collins, Karen A. Schwarz, Richard P. Barkaoui, Khalid Watkins, Cristilyn N. Shporer, Avi Narita, Norio Fukui, Akihiko Srdoc, Gregor Latham, David W. Jenkins, Jon M. Ricker, George R. Seager, Sara Vanderspek, Roland |
| contents | TOI-6255~b (GJ 4256) is an Earth-sized planet (1.079$\pm0.065$ $R_\oplus$) with an orbital period of only 5.7 hours. With the newly commissioned Keck Planet Finder (KPF) and CARMENES spectrographs, we determined the planet's mass to be 1.44$\pm$0.14 $M_{\oplus}$. The planet is just outside the Roche limit, with $P_{\rm orb}/P_{\rm Roche}$ = 1.13 $\pm0.10$. The strong tidal force likely deforms the planet into a triaxial ellipsoid with a long axis that is $\sim$10\% longer than the short axis. Assuming a reduced stellar tidal quality factor $Q_\star^\prime \approx10^7$, we predict that tidal orbital decay will cause TOI-6255 to reach the Roche limit in roughly 400 Myr. Such tidal disruptions may produce the possible signatures of planet engulfment that have been on stars with anomalously high refractory elemental abundances compared to its conatal binary companion. TOI-6255 b is also a favorable target for searching for star-planet magnetic interactions, which might cause interior melting and hasten orbital decay. TOI-6255 b is a top target (Emission Spectroscopy Metric of about 24) for phase curve observations with the James Webb Space Telescope. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2407_21167 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | An Earth-sized Planet on the Verge of Tidal Disruption Dai, Fei Howard, Andrew W. Halverson, Samuel Orell-Miquel, Jaume Palle, Enric Isaacson, Howard Fulton, Benjamin Price, Ellen M. Plotnykov, Mykhaylo Rogers, Leslie A. Valencia, Diana Paragas, Kimberly Greklek-McKeon, Michael Barrientos, Jonathan Gomez Knutson, Heather A. Petigura, Erik A. Weiss, Lauren M. Lee, Rena Brinkman, Casey L. Huber, Daniel Steffansson, Gudmundur Masuda, Kento Giacalone, Steven Lu, Cicero X. Kite, Edwin S. Hu, Renyu Gaidos, Eric Zhang, Michael Rubenzahl, Ryan A. Winn, Joshua N. Han, Te Beard, Corey Holcomb, Rae Householder, Aaron Gilbert, Gregory J. Lubin, Jack Ong, J. M. Joel Polanski, Alex S. Saunders, Nicholas Van Zandt, Judah Yee, Samuel W. Zhang, Jingwen Zink, Jon Holden, Bradford Baker, Ashley Brodheim, Max Crossfield, Ian J. M. Deich, William Edelstein, Jerry Gibson, Steven R. Hill, Grant M. Jelinsky, Sharon R Kassis, Marc Laher, Russ R. Lanclos, Kyle Lilley, Scott Payne, Joel N. Rider, Kodi Robertson, Paul Roy, Arpita Schwab, Christian Shaum, Abby P. Sirk, Martin M. Smith, Chris Vandenberg, Adam Walawender, Josh Wang, Sharon X. Shin-Ywan Wang Wishnow, Edward Wright, Jason T. Yeh, Sherry Caballero, Jos. A. Morales, Juan C. Murgas, Felipe Nagel, Evangelos Reiners, Ansgar Schweitzer, Andreas Tabernero, Hugo M. Zechmeister, Mathias Spencer, Alton Ciardi, David R. Clark, Catherine A. Lund, Michael B. Caldwell, Douglas A. Collins, Karen A. Schwarz, Richard P. Barkaoui, Khalid Watkins, Cristilyn N. Shporer, Avi Narita, Norio Fukui, Akihiko Srdoc, Gregor Latham, David W. Jenkins, Jon M. Ricker, George R. Seager, Sara Vanderspek, Roland Earth and Planetary Astrophysics Solar and Stellar Astrophysics TOI-6255~b (GJ 4256) is an Earth-sized planet (1.079$\pm0.065$ $R_\oplus$) with an orbital period of only 5.7 hours. With the newly commissioned Keck Planet Finder (KPF) and CARMENES spectrographs, we determined the planet's mass to be 1.44$\pm$0.14 $M_{\oplus}$. The planet is just outside the Roche limit, with $P_{\rm orb}/P_{\rm Roche}$ = 1.13 $\pm0.10$. The strong tidal force likely deforms the planet into a triaxial ellipsoid with a long axis that is $\sim$10\% longer than the short axis. Assuming a reduced stellar tidal quality factor $Q_\star^\prime \approx10^7$, we predict that tidal orbital decay will cause TOI-6255 to reach the Roche limit in roughly 400 Myr. Such tidal disruptions may produce the possible signatures of planet engulfment that have been on stars with anomalously high refractory elemental abundances compared to its conatal binary companion. TOI-6255 b is also a favorable target for searching for star-planet magnetic interactions, which might cause interior melting and hasten orbital decay. TOI-6255 b is a top target (Emission Spectroscopy Metric of about 24) for phase curve observations with the James Webb Space Telescope. |
| title | An Earth-sized Planet on the Verge of Tidal Disruption |
| topic | Earth and Planetary Astrophysics Solar and Stellar Astrophysics |
| url | https://arxiv.org/abs/2407.21167 |