학술논문
HD 20329b: An ultra-short-period planet around a solar-type star found by TESS
Document Type
Working Paper
Author
Murgas, F.; Nowak, G.; Masseron, T.; Parviainen, H.; Luque, R.; Pallé, E.; Korth, Judith; Carleo, I.; Csizmadia, Sz.; Esparza-Borges, E.; Alqasim, Ahlam; Cochran, William D.; Dai, Fei; Deeg, Hans J.; Gandolfi, D.; Goffo, Elisa; Kabáth, Petr; Lam, K. W. F.; Livingston, John; Muresan, Alexandra; Osborne, H. L. M.; Persson, Carina M.; Serrano, L. M.; Smith, Alexis M. S.; Van Eylen, Vincent; Orell-Miquel, J.; Hinkel, Natalie R.; Galán, D.; Puig-Subirà, M.; Stangret, M.; Fukui, A.; Kagetani, T.; Narita, N.; Ciardi, David R.; Boyle, Andrew W.; Ziegler, Carl; Briceño, César; Law, Nicholas; Mann, Andrew W.; Jenkins, Jon M.; Latham, David W.; Quinn, Samuel N.; Ricker, G.; Seager, S.; Shporer, Avi; Ting, Eric B.; Vanderspek, R.; Winn, Joshua N.
Source
A&A 668, A158 (2022)
Subject
Language
Abstract
We used TESS light curves and HARPS-N spectrograph radial velocity measurements to establish the physical properties of the transiting exoplanet candidate found around the star HD 20329 (TOI-4524). We performed a joint fit of the light curves and radial velocity time series to measure the mass, radius, and orbital parameters of the candidate. We confirm and characterize HD 20329b, an ultra-short-period (USP) planet transiting a solar-type star. The host star (HD 20329, $V = 8.74$ mag, $J = 7.5$ mag) is characterized by its G5 spectral type with $\mathrm{M}_\star= 0.90 \pm 0.05$ M$_\odot$, $\mathrm{R}_\star = 1.13 \pm 0.02$ R$_\odot$, and $\mathrm{T}_{\mathrm{eff}} = 5596 \pm 50$ K; it is located at a distance $d= 63.68 \pm 0.29$ pc. By jointly fitting the available TESS transit light curves and follow-up radial velocity measurements, we find an orbital period of $0.9261 \pm (0.5\times 10^{-4})$ days, a planetary radius of $1.72 \pm 0.07$ $\mathrm{R}_\oplus$, and a mass of $7.42 \pm 1.09$ $\mathrm{M}_\oplus$, implying a mean density of $\rho_\mathrm{p} = 8.06 \pm 1.53$ g cm$^{-3}$. HD 20329b joins the $\sim$30 currently known USP planets with radius and Doppler mass measurements.
Comment: Accepted for publication in A&A, 26 pages
Comment: Accepted for publication in A&A, 26 pages