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TOI-1842b: A Transiting Warm Saturn Undergoing Reinflation around an Evolving Subgiant
- Source :
- Wittenmyer, R A, Clark, J T, Trifonov, T, Addison, B C, Wright, D J, Stassun, K G, Horner, J, Lowson, N, Kielkopf, J, Kane, S R, Plavchan, P, Shporer, A, Zhang, H, Bowler, B P, Mengel, M W, Okumura, J, Rabus, M, Johnson, M C, Harbeck, D, Tronsgaard, R, Buchhave, L A, Collins, K A, Collins, K I, Gan, T, Jensen, E L N, Howell, S B, Furlan, E, Gnilka, C L, Lester, K V, Matson, R A, Scott, N J, Ricker, G R, Vanderspek, R, Latham, D W, Seager, S, Winn, J N, Jenkins, J M, Rudat, A, Quintana, E V, Rodriguez, D R, Caldwell, D A, Quinn, S N, Essack, Z & Bouma, L G 2022, ' TOI-1842b: A Transiting Warm Saturn Undergoing Reinflation around an Evolving Subgiant ', Astronomical Journal, vol. 163, no. 2, 82 . https://doi.org/10.3847/1538-3881/ac3f39
- Publication Year :
- 2022
- Publisher :
- American Astronomical Society, 2022.
-
Abstract
- The imminent launch of space telescopes designed to probe the atmospheres of exoplanets has prompted new efforts to prioritise the thousands of transiting planet candidates for follow-up characterisation. We report the detection and confirmation of TOI-1842b, a warm Saturn identified by TESS and confirmed with ground-based observations from Minerva-Australis, NRES, and the Las Cumbres Observatory Global Telescope. This planet has a radius of $1.04^{+0.06}_{-0.05}\,R_{Jup}$, a mass of $0.214^{+0.040}_{-0.038}\,M_{Jup}$, an orbital period of $9.5739^{+0.0002}_{-0.0001}$ days, and an extremely low density ($\rho$=0.252$\pm$0.091 g cm$^{-3}$). TOI-1842b has among the best known combinations of large atmospheric scale height (893 km) and host-star brightness ($J=8.747$ mag), making it an attractive target for atmospheric characterisation. As the host star is beginning to evolve off the main sequence, TOI-1842b presents an excellent opportunity to test models of gas giant re-inflation. The primary transit duration of only 4.3 hours also makes TOI-1842b an easily-schedulable target for further ground-based atmospheric characterisation.<br />Comment: Accepted for publication in AJ
Details
- Language :
- English
- Database :
- OpenAIRE
- Journal :
- Wittenmyer, R A, Clark, J T, Trifonov, T, Addison, B C, Wright, D J, Stassun, K G, Horner, J, Lowson, N, Kielkopf, J, Kane, S R, Plavchan, P, Shporer, A, Zhang, H, Bowler, B P, Mengel, M W, Okumura, J, Rabus, M, Johnson, M C, Harbeck, D, Tronsgaard, R, Buchhave, L A, Collins, K A, Collins, K I, Gan, T, Jensen, E L N, Howell, S B, Furlan, E, Gnilka, C L, Lester, K V, Matson, R A, Scott, N J, Ricker, G R, Vanderspek, R, Latham, D W, Seager, S, Winn, J N, Jenkins, J M, Rudat, A, Quintana, E V, Rodriguez, D R, Caldwell, D A, Quinn, S N, Essack, Z & Bouma, L G 2022, ' TOI-1842b: A Transiting Warm Saturn Undergoing Reinflation around an Evolving Subgiant ', Astronomical Journal, vol. 163, no. 2, 82 . https://doi.org/10.3847/1538-3881/ac3f39
- Accession number :
- edsair.doi.dedup.....41a3daddfc4481680dd4cfdc5eacf27d