TY - JOUR
T1 - TOI-3785 b
T2 - A Low-density Neptune Orbiting an M2-dwarf Star
AU - Powers, Luke C.
AU - Libby-Roberts, Jessica
AU - Lin, Andrea S.J.
AU - Cañas, Caleb I.
AU - Kanodia, Shubham
AU - Mahadevan, Suvrath
AU - Ninan, Joe P.
AU - Stefánsson, Guđmundur
AU - Gupta, Arvind F.
AU - Jones, Sinclaire
AU - Kobulnicky, Henry A.
AU - Monson, Andrew
AU - Parker, Brock A.
AU - Swaby, Tera N.
AU - Bender, Chad F.
AU - Cochran, William D.
AU - Hebb, Leslie
AU - Metcalf, Andrew J.
AU - Robertson, Paul
AU - Schwab, Christian
AU - Wisniewski, John
AU - Wright, Jason T.
N1 - Publisher Copyright:
© 2023. The Author(s). Published by the American Astronomical Society.
PY - 2023/8/1
Y1 - 2023/8/1
N2 - Using both ground-based transit photometry and high-precision radial velocity spectroscopy, we confirm the planetary nature of TOI-3785 b. This transiting Neptune orbits an M2-Dwarf star with a period of ∼4.67 days, a planetary radius of 5.14 ± 0.16 R ⊕, a mass of 14.95 − 3.92 + 4.10 M ⊕, and a density of ρ = 0.61 − 0.17 + 0.18 g cm−3. TOI-3785 b belongs to a rare population of Neptunes (4 R ⊕ < R p < 7 R ⊕) orbiting cooler, smaller M-dwarf host stars, of which only ∼10 have been confirmed. By increasing the number of confirmed planets, TOI-3785 b offers an opportunity to compare similar planets across varying planetary and stellar parameter spaces. Moreover, with a high-transmission spectroscopy metric of ∼150 combined with a relatively cool equilibrium temperature of T eq = 582 ± 16 K and an inactive host star, TOI-3785 b is one of the more promising low-density M-dwarf Neptune targets for atmospheric follow up. Future investigation into atmospheric mass-loss rates of TOI-3785 b may yield new insights into the atmospheric evolution of these low-mass gas planets around M dwarfs.
AB - Using both ground-based transit photometry and high-precision radial velocity spectroscopy, we confirm the planetary nature of TOI-3785 b. This transiting Neptune orbits an M2-Dwarf star with a period of ∼4.67 days, a planetary radius of 5.14 ± 0.16 R ⊕, a mass of 14.95 − 3.92 + 4.10 M ⊕, and a density of ρ = 0.61 − 0.17 + 0.18 g cm−3. TOI-3785 b belongs to a rare population of Neptunes (4 R ⊕ < R p < 7 R ⊕) orbiting cooler, smaller M-dwarf host stars, of which only ∼10 have been confirmed. By increasing the number of confirmed planets, TOI-3785 b offers an opportunity to compare similar planets across varying planetary and stellar parameter spaces. Moreover, with a high-transmission spectroscopy metric of ∼150 combined with a relatively cool equilibrium temperature of T eq = 582 ± 16 K and an inactive host star, TOI-3785 b is one of the more promising low-density M-dwarf Neptune targets for atmospheric follow up. Future investigation into atmospheric mass-loss rates of TOI-3785 b may yield new insights into the atmospheric evolution of these low-mass gas planets around M dwarfs.
UR - http://www.scopus.com/inward/record.url?scp=85164429125&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85164429125&partnerID=8YFLogxK
U2 - 10.3847/1538-3881/acd8bf
DO - 10.3847/1538-3881/acd8bf
M3 - Article
AN - SCOPUS:85164429125
SN - 0004-6256
VL - 166
JO - Astronomical Journal
JF - Astronomical Journal
IS - 2
M1 - 44
ER -