TOI-1670 b and c: An Inner Sub-Neptune with an Outer Warm Jupiter Unlikely to Have Originated from High-eccentricity Migration
Article
Article Title | TOI-1670 b and c: An Inner Sub-Neptune with an Outer Warm Jupiter Unlikely to Have Originated from High-eccentricity Migration |
---|---|
ERA Journal ID | 1048 |
Article Category | Article |
Authors | Tran, Quang H., Bowler, Brendan P., Endl, Michael, Cochran, William D., MacQueen, Phillip J., Gandolfi, Davide, Persson, Carina M., Fridlund, Malcolm, Palle, Enric, Nowak, Grzegorz, Deeg, Hans J., Luque, Rafael, Livingston, John H., Kabath, Petr, Skarka, Marek, Subjak, Ján, Howell, Steve B., Albrecht, Simon H., Collins, Karen A., Esposito, Massimiliano, Van Eylen, Vincent, Grziwa, Sascha, Goffo, Elisa, Huang, Chelsea X., Jenkins, Jon M., Karjalainen, Marie, Karjalainen, Raine, Knudstrup, Emil, Korth, Judith, Lam, Kristine W. F., Latham, David W., Levine, Alan M., Osborne, H. L. M., Quinn, Samuel N., Redfield, Seth, Ricker, George R., Seager, S., Serrano, Luisa Maria, Smith, Alexis M. S., Twicken, Joseph D. and Winn, Joshua N. |
Journal Title | The Astronomical Journal |
Journal Citation | 163 (5) |
Number of Pages | 16 |
Year | 2022 |
Publisher | IOP Publishing |
Place of Publication | United States |
ISSN | 0004-6256 |
1538-3881 | |
Digital Object Identifier (DOI) | https://doi.org/10.3847/1538-3881/ac5c4f |
Web Address (URL) | https://iopscience.iop.org/article/10.3847/1538-3881/ac5c4f |
Abstract | We report the discovery of two transiting planets around the bright (V = 9.9 mag) main-sequence F7 star TOI-1670 by the Transiting Exoplanet Survey Satellite. TOI-1670 b is a sub-Neptune (${R}_{{\rm{b}}}={2.06}_{-0.15}^{+0.19}$ R⊕) on a 10.9 day orbit, and TOI-1670 c is a warm Jupiter (${R}_{{\rm{c}}}={0.987}_{-0.025}^{+0.025}$ RJup) on a 40.7 day orbit. Using radial velocity observations gathered with the Tull Coudé Spectrograph on the Harlan J. Smith telescope and HARPS-N on the Telescopio Nazionale Galileo, we find a planet mass of ${M}_{{\rm{c}}}={0.63}_{-0.08}^{+0.09}$ MJup for the outer warm Jupiter, implying a mean density of ${\rho }_{c}={0.81}_{-0.11}^{+0.13}$ g cm−3. The inner sub-Neptune is undetected in our radial velocity data (Mb < 0.13 MJup at the 99% confidence level). Multiplanet systems like TOI-1670 hosting an outer warm Jupiter on a nearly circular orbit (${e}_{{\rm{c}}}={0.09}_{-0.04}^{+0.05}$) and one or more inner coplanar planets are more consistent with "gentle" formation mechanisms such as disk migration or in situ formation rather than high-eccentricity migration. Of the 11 known systems with a warm Jupiter and a smaller inner companion, eight (73%) are near a low-order mean-motion resonance, which can be a signature of migration. TOI-1670 joins two other systems (27% of this subsample) with period commensurabilities greater than 3, a common feature of in situ formation or halted inward migration. TOI-1670 and the handful of similar systems support a diversity of formation pathways for warm Jupiters. |
Keywords | Exoplanet astronomy; Radial velocity; Exoplanet formation; Transit |
ANZSRC Field of Research 2020 | 510109. Stellar astronomy and planetary systems |
https://research.usq.edu.au/item/yy954/toi-1670-b-and-c-an-inner-sub-neptune-with-an-outer-warm-jupiter-unlikely-to-have-originated-from-high-eccentricity-migration
Download files
71
total views20
total downloads0
views this month0
downloads this month