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HD 207897 b:A dense sub-Neptune transiting a nearby and bright K-type star
- Source :
- Heidari, N, Boisse, I, Orell-Miquel, J, Hébrard, G, Acuña, L, Hara, N C, Lillo-Box, J, Eastman, J D, Arnold, L, Astudillo-Defru, N, Adibekyan, V, Bieryla, A, Bonfils, X, Bouchy, F, Barclay, T, Brasseur, C E, Borgniet, S, Bourrier, V, Buchhave, L, Behmard, A, Beard, C, Batalha, N M, Courcol, B, Cortés-Zuleta, P, Collins, K, Carmona, A, Crossfield, I J M, Chontos, A, Delfosse, X, Dalal, S, Deleuil, M, Demangeon, O D S, Diáz, R F, Dumusque, X, Daylan, T, Dragomir, D, Delgado Mena, E, Dressing, C, Dai, F, Dalba, P A, Ehrenreich, D, Forveille, T, Fulton, B, Fetherolf, T, Gaisné, G, Giacalone, S, Riazi, N, Hoyer, S, Hobson, M J, Howard, A W, Huber, D, Hill, M L, Hirsch, L A, Isaacson, H, Jenkins, J, Kane, S R, Kiefer, F, Luque, R, Latham, D W, Lubin, J, Lopez, T, Mousis, O, Moutou, C, Montagnier, G, Mignon, L, Mayo, A, Močnik, T, Murphy, J M A, Palle, E, Pepe, F, Petigura, E A, Rey, J, Ricker, G, Robertson, P, Roy, A, Rubenzahl, R A, Rosenthal, L J, Santerne, A, Santos, N C, Sousa, S G, Stassun, K G, Stalport, M, Scarsdale, N, Strøm, P A, Seager, S, Segransan, D, Tenenbaum, P, Tronsgaard, R, Udry, S, Vanderspek, R, Vakili, F, Winn, J & Weiss, L M 2022, ' HD 207897 b : A dense sub-Neptune transiting a nearby and bright K-type star ', Astronomy and Astrophysics, vol. 658, A176 . https://doi.org/10.1051/0004-6361/202141429, aap, aap, 2022, 658, pp.A176. ⟨10.1051/0004-6361/20214142910.48550/arXiv.2110.08597⟩, A&A, Astronomy and Astrophysics-A&A, Astronomy and Astrophysics-A&A, 2022, 658, pp.A176. ⟨10.1051/0004-6361/202141429⟩
- Publication Year :
- 2022
-
Abstract
- We present the discovery and characterization of a transiting sub-Neptune orbiting with a 16.20 day period around a nearby (28 pc) and bright(V=8.37) K0V star HD207897 (TOI-1611). This discovery is based on photometric measurements from the Transiting Exoplanet Survey Satellite(TESS) mission and radial velocity (RV) observations from the SOPHIE, Automated Planet Finder (APF) and HIRES high precision spectrographs. We used EXOFASTv2 for simultaneously modeling the parameters of the planet and its host star, combining photometric and RV data to determine the planetary system parameters. We show that the planet has a radius of 2.50+/-0.08 RE and a mass of either 14.4+/-1.6 ME or 15.9+/-1.6 ME with nearly equal probability; the two solutions correspond to two possibilities for the stellar activity period. Hence, the density is either 5.1+/-0.7 g cm^-3 or 5.5^{+0.8}_{-0.7} g cm^-3, making it one of the relatively rare dense sub-Neptunes. The existence of such a dense planet at only 0.12 AU from its host star is unusual in the currently observed sub-Neptune (2<br />Comment: 18 pages, 12 figures, 6 tables; accepted for publication in the A&A journal; comments welcome
- Subjects :
- Physics
Earth and Planetary Astrophysics (astro-ph.EP)
education.field_of_study
[PHYS.ASTR.EP]Physics [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP]
010308 nuclear & particles physics
Population
FOS: Physical sciences
Astronomy and Astrophysics
Astrophysics
Radius
Planetary system
Star (graph theory)
01 natural sciences
Exoplanet
Radial velocity
13. Climate action
Space and Planetary Science
Planet
Neptune
0103 physical sciences
[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
education
010303 astronomy & astrophysics
QB
Astrophysics - Earth and Planetary Astrophysics
Subjects
Details
- Language :
- English
- ISSN :
- 00046361
- Database :
- OpenAIRE
- Journal :
- Heidari, N, Boisse, I, Orell-Miquel, J, Hébrard, G, Acuña, L, Hara, N C, Lillo-Box, J, Eastman, J D, Arnold, L, Astudillo-Defru, N, Adibekyan, V, Bieryla, A, Bonfils, X, Bouchy, F, Barclay, T, Brasseur, C E, Borgniet, S, Bourrier, V, Buchhave, L, Behmard, A, Beard, C, Batalha, N M, Courcol, B, Cortés-Zuleta, P, Collins, K, Carmona, A, Crossfield, I J M, Chontos, A, Delfosse, X, Dalal, S, Deleuil, M, Demangeon, O D S, Diáz, R F, Dumusque, X, Daylan, T, Dragomir, D, Delgado Mena, E, Dressing, C, Dai, F, Dalba, P A, Ehrenreich, D, Forveille, T, Fulton, B, Fetherolf, T, Gaisné, G, Giacalone, S, Riazi, N, Hoyer, S, Hobson, M J, Howard, A W, Huber, D, Hill, M L, Hirsch, L A, Isaacson, H, Jenkins, J, Kane, S R, Kiefer, F, Luque, R, Latham, D W, Lubin, J, Lopez, T, Mousis, O, Moutou, C, Montagnier, G, Mignon, L, Mayo, A, Močnik, T, Murphy, J M A, Palle, E, Pepe, F, Petigura, E A, Rey, J, Ricker, G, Robertson, P, Roy, A, Rubenzahl, R A, Rosenthal, L J, Santerne, A, Santos, N C, Sousa, S G, Stassun, K G, Stalport, M, Scarsdale, N, Strøm, P A, Seager, S, Segransan, D, Tenenbaum, P, Tronsgaard, R, Udry, S, Vanderspek, R, Vakili, F, Winn, J & Weiss, L M 2022, ' HD 207897 b : A dense sub-Neptune transiting a nearby and bright K-type star ', Astronomy and Astrophysics, vol. 658, A176 . https://doi.org/10.1051/0004-6361/202141429, aap, aap, 2022, 658, pp.A176. ⟨10.1051/0004-6361/20214142910.48550/arXiv.2110.08597⟩, A&A, Astronomy and Astrophysics-A&A, Astronomy and Astrophysics-A&A, 2022, 658, pp.A176. ⟨10.1051/0004-6361/202141429⟩
- Accession number :
- edsair.doi.dedup.....c45535bfbc2b44d80aa4ccfcf7e815bb