An Earth-sized Planet on the Verge of Tidal Disruption
Article
Article Title | An Earth-sized Planet on the Verge of Tidal Disruption |
---|---|
ERA Journal ID | 1048 |
Article Category | Article |
Authors | 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, Stefansson, Gumundur, 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, Walawende, Josh, Wang, Sharon X., Wang, Shin-Ywan (Cindy), Wishnow, Edward, Wright, Jason T., Yeh, Sherry, Caballero, José 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, Shporer, Avi, Narita, Norio, Fukui, Akihiko, Srdoc, Gregor, Latham, David W., Jenkins, Jon M., Ricker, George R., Seager, Sara and Vanderspek, Roland |
Journal Title | The Astronomical Journal |
Journal Citation | 168 (3) |
Article Number | 101 |
Number of Pages | 19 |
Year | 2024 |
Publisher | IOP Publishing |
Place of Publication | United States |
ISSN | 0004-6256 |
1538-3881 | |
Digital Object Identifier (DOI) | https://doi.org/10.3847/1538-3881/ad5a7d |
Web Address (URL) | https://iopscience.iop.org/article/10.3847/1538-3881/ad5a7d |
Abstract | TOI-6255 b (GJ 4256) is an Earth-sized planet (1.079 ± 0.065 R⊕) with an orbital period of only 5.7 hr. With the newly commissioned Keck Planet Finder and CARMENES spectrographs, we determine the planet’s mass to be 1.44 ± 0.14 M⊕. The planet is just outside the Roche limit, with Porb/PRoche = 1.13 ± 0.10. The strong tidal force likely deforms the planet into a triaxial ellipsoid with a long axis that is ∼10% longer than the short axis. Assuming a reduced stellar tidal quality factor Q 107 ¢ » , 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 seen on stars with anomalously high refractory elemental abundances compared to their conatal binary companions. 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 (with an Emission Spectroscopy Metric of about 24) for phase-curve observations with the James Webb Space Telescope. |
Keywords | Exoplanet formation; Star-planet interactions; Exoplanet evolution |
Contains Sensitive Content | Does not contain sensitive content |
ANZSRC Field of Research 2020 | 5101. Astronomical sciences |
Byline Affiliations | University of Hawaii, United States |
California Institute of Technology (Caltech), United States | |
Institute of Astrophysics of the Canary Islands, Spain | |
University of California Berkeley, United States | |
Centre for Astrophysics | |
NASA Exoplanet Science Institute, United States | |
University of Chicago, United States | |
University of Toronto, Canada | |
University of California Los Angeles, United States | |
University of Notre Dame, United States | |
University of Sydney | |
University of Amsterdam, Netherlands | |
Osaka University, Japan | |
Gemini Observatory, United States | |
NSF's National Optical Infrared Astronomy Research Laboratory (NOIRLab), United States | |
Princeton University, United States | |
University of California Irvine, United States | |
Massachusetts Institute of Technology, United States | |
University of Kansas, United States | |
Center for Astrophysics Harvard and Smithsonian, United States | |
University of California Santa Cruz, United States | |
W. M. Keck Observatory, United States | |
Schmidt Sciences, United States | |
Macquarie University | |
Tsinghua University, China | |
University Park, United States | |
Center for Astrobiology (CAB, CSIC-INTA), Spain | |
Institute of Space Sciences, Spain | |
Institute of Space Studies of Catalonia (IEEC), Spain | |
University of La Laguna, Spain | |
Institute for Astrophysics and Geophysics, Germany | |
Hamburg Observatory, Germany | |
Complutense University of Madrid, Spain | |
Western Connecticut State University, United States | |
SETI Institute, United States | |
Astrobiology Center, Japan | |
University of Tokyo, Japan | |
Kotizarovci Observatory, Croatia | |
NASA Ames Research Center, United States |
https://research.usq.edu.au/item/z99q7/an-earth-sized-planet-on-the-verge-of-tidal-disruption
Download files
13
total views2
total downloads4
views this month0
downloads this month