TOI-3493 b: A planet with a Neptune-like density transiting a bright G0-type star

Fuente: arXiv

Gespeichert in:

Bibliographische Detailangaben
Hauptverfasser:	Chaturvedi, P., Goffo, E., Gandolfi, D., Persson, C. M., Hatzes, A. P., Nowak, G., Bonfanti, A., Bieryla, A., Cochran, W. D., Collins, K. A., Fajardo-Acosta, S. B., Howell, S. B., Jenkins, J. M., Korth, J., Livingston, J., Palle, E., Quinn, S. N., Schwarz, R. P., Seager, S., Shporer, A., Stassun, K. G., Striegel, S., Van Eylen, V., Watkins, C. N., Winn, J. N., Ziegler, C.
Format:	Preprint
Veröffentlicht:	2025
Schlagworte:	Earth and Planetary Astrophysics Solar and Stellar Astrophysics
Online-Zugang:	Acceder al recurso
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

_version_	1866909583110307840
author	Chaturvedi, P. Goffo, E. Gandolfi, D. Persson, C. M. Hatzes, A. P. Nowak, G. Bonfanti, A. Bieryla, A. Cochran, W. D. Collins, K. A. Fajardo-Acosta, S. B. Howell, S. B. Jenkins, J. M. Korth, J. Livingston, J. Palle, E. Quinn, S. N. Schwarz, R. P. Seager, S. Shporer, A. Stassun, K. G. Striegel, S. Van Eylen, V. Watkins, C. N. Winn, J. N. Ziegler, C.
author_facet	Chaturvedi, P. Goffo, E. Gandolfi, D. Persson, C. M. Hatzes, A. P. Nowak, G. Bonfanti, A. Bieryla, A. Cochran, W. D. Collins, K. A. Fajardo-Acosta, S. B. Howell, S. B. Jenkins, J. M. Korth, J. Livingston, J. Palle, E. Quinn, S. N. Schwarz, R. P. Seager, S. Shporer, A. Stassun, K. G. Striegel, S. Van Eylen, V. Watkins, C. N. Winn, J. N. Ziegler, C.
contents	We report the discovery of TOI-3493 b, a sub-Neptune-sized planet on an 8.15-d orbit transiting the bright (V=9.3) G0 star HD 119355 (aka TIC 203377303) initially identified by NASA's TESS space mission. With the aim of confirming the planetary nature of the transit signal detected by TESS and determining the mass of the planet, we performed an intensive Doppler campaign with the HARPS spectrograph, collecting radial velocity measurements. We found that TOI-3493 b lies in a nearly circular orbit and has a mass of 9.0+/-1.2 M_earth and a radius of 3.22+/-0.08 R_earth, implying a bulk density of 1.47+/-0.23 g/cm^3, consistent with a composition comprising a small solid core surrounded by a thick H/He dominated atmosphere.
format	Preprint
id	arxiv_https___arxiv_org_abs_2504_12884
institution	arXiv
publishDate	2025
record_format	arxiv
spellingShingle	TOI-3493 b: A planet with a Neptune-like density transiting a bright G0-type star Chaturvedi, P. Goffo, E. Gandolfi, D. Persson, C. M. Hatzes, A. P. Nowak, G. Bonfanti, A. Bieryla, A. Cochran, W. D. Collins, K. A. Fajardo-Acosta, S. B. Howell, S. B. Jenkins, J. M. Korth, J. Livingston, J. Palle, E. Quinn, S. N. Schwarz, R. P. Seager, S. Shporer, A. Stassun, K. G. Striegel, S. Van Eylen, V. Watkins, C. N. Winn, J. N. Ziegler, C. Earth and Planetary Astrophysics Solar and Stellar Astrophysics We report the discovery of TOI-3493 b, a sub-Neptune-sized planet on an 8.15-d orbit transiting the bright (V=9.3) G0 star HD 119355 (aka TIC 203377303) initially identified by NASA's TESS space mission. With the aim of confirming the planetary nature of the transit signal detected by TESS and determining the mass of the planet, we performed an intensive Doppler campaign with the HARPS spectrograph, collecting radial velocity measurements. We found that TOI-3493 b lies in a nearly circular orbit and has a mass of 9.0+/-1.2 M_earth and a radius of 3.22+/-0.08 R_earth, implying a bulk density of 1.47+/-0.23 g/cm^3, consistent with a composition comprising a small solid core surrounded by a thick H/He dominated atmosphere.
title	TOI-3493 b: A planet with a Neptune-like density transiting a bright G0-type star
topic	Earth and Planetary Astrophysics Solar and Stellar Astrophysics
url	https://arxiv.org/abs/2504.12884