Bibcode
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.; Pallé, 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.
Bibliographical reference
Astronomy and Astrophysics
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5
2025
Journal
Citations
1
Refereed citations
1
Description
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⊕ and a radius of 3.22 ± 0.08 R⊕, implying a bulk density of 1.47-0.22+0.23 g cm‑3, consistent with a composition comprising a small solid core surrounded by a thick H/He-dominated atmosphere.
Related projects
Exoplanets and Astrobiology
The search for life in the universe has been driven by recent discoveries of planets around other stars (known as exoplanets), becoming one of the most active fields in modern astrophysics. The growing number of new exoplanets discovered in recent years and the recent advance on the study of their atmospheres are not only providing new valuable
Enric
Pallé Bago