Imperial College London
Portrait Picture

DrJamesOwen

Faculty of Natural Sciences, Department of Physics

Senior Lecturer in Exoplanet Physics
 
 
 
//

Contact

 

+44 (0)20 7594 5785james.owen CV

 
 
//

Location

 

Blackett LaboratorySouth Kensington Campus

//

Summary

 

Publications

Citation

BibTex format

@article{Mann:2022:1538-3881/ac511d,
author = {Mann, AW and Wood, ML and Schmidt, SP and Barber, MG and Owen, JE and Tofflemire, BM and Newton, ER and Mamajek, EE and Bush, JL and Mace, GN and Kraus, AL and Thao, PC and Vanderburg, A and Llama, J and Johns-Krull, CM and Prato, L and Stahl, AG and Tang, S-Y and Fields, MJ and Collins, KA and Collins, KI and Gan, T and Jensen, ELN and Kamler, J and Schwarz, RP and Furlan, E and Gnilka, CL and Howell, SB and Lester, KV and Owens, DA and Suarez, O and Mekarnia, D and Guillot, T and Abe, L and Triaud, AHMJ and Johnson, MC and Milburn, RP and Rizzuto, AC and Quinn, SN and Kerr, R and Ricker, GR and Vanderspek, R and Latham, DW and Seager, S and Winn, JN and Jenkins, JM and Guerrero, NM and Shporer, A and Schlieder, JE and McLean, B and Wohler, B},
doi = {1538-3881/ac511d},
journal = {The Astronomical Journal},
pages = {156--156},
title = {TESS hunt for young and maturing exoplanets (THYME). VI. an 11 Myr giant planet transiting a very-low-mass star in lower centaurus crux},
url = {http://dx.doi.org/10.3847/1538-3881/ac511d},
volume = {163},
year = {2022}
}
Download

RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Mature super-Earths and sub-Neptunes are predicted to be  Jovian radius when younger than 10 Myr. Thus, we expect to find 5–15 R⊕ planets around young stars even if their older counterparts harbor none. We report the discovery and validation of TOI 1227b, a 0.85 ± 0.05 RJ (9.5 R⊕) planet transiting a very-low-mass star (0.170 ± 0.015 M) every 27.4 days. TOI 1227's kinematics and strong lithium absorption confirm that it is a member of a previously discovered subgroup in the Lower Centaurus Crux OB association, which we designate the Musca group. We derive an age of 11 ± 2 Myr for Musca, based on lithium, rotation, and the color–magnitude diagram of Musca members. The TESS data and ground-based follow-up show a deep (2.5%) transit. We use multiwavelength transit observations and radial velocities from the IGRINS spectrograph to validate the signal as planetary in nature, and we obtain an upper limit on the planet mass of 0.5 MJ. Because such large planets are exceptionally rare around mature low-mass stars, we suggest that TOI 1227b is still contracting and will eventually turn into one of the more common <5 R⊕ planets.
AU  - Mann,AW
AU  - Wood,ML
AU  - Schmidt,SP
AU  - Barber,MG
AU  - Owen,JE
AU  - Tofflemire,BM
AU  - Newton,ER
AU  - Mamajek,EE
AU  - Bush,JL
AU  - Mace,GN
AU  - Kraus,AL
AU  - Thao,PC
AU  - Vanderburg,A
AU  - Llama,J
AU  - Johns-Krull,CM
AU  - Prato,L
AU  - Stahl,AG
AU  - Tang,S-Y
AU  - Fields,MJ
AU  - Collins,KA
AU  - Collins,KI
AU  - Gan,T
AU  - Jensen,ELN
AU  - Kamler,J
AU  - Schwarz,RP
AU  - Furlan,E
AU  - Gnilka,CL
AU  - Howell,SB
AU  - Lester,KV
AU  - Owens,DA
AU  - Suarez,O
AU  - Mekarnia,D
AU  - Guillot,T
AU  - Abe,L
AU  - Triaud,AHMJ
AU  - Johnson,MC
AU  - Milburn,RP
AU  - Rizzuto,AC
AU  - Quinn,SN
AU  - Kerr,R
AU  - Ricker,GR
AU  - Vanderspek,R
AU  - Latham,DW
AU  - Seager,S
AU  - Winn,JN
AU  - Jenkins,JM
AU  - Guerrero,NM
AU  - Shporer,A
AU  - Schlieder,JE
AU  - McLean,B
AU  - Wohler,B
DO  - 1538-3881/ac511d
EP  - 156
PY  - 2022///
SN  - 0004-6256
SP  - 156
TI  - TESS hunt for young and maturing exoplanets (THYME). VI. an 11 Myr giant planet transiting a very-low-mass star in lower centaurus crux
T2  - The Astronomical Journal
UR  - http://dx.doi.org/10.3847/1538-3881/ac511d
UR  - https://iopscience.iop.org/article/10.3847/1538-3881/ac511d
UR  - http://hdl.handle.net/10044/1/95890
VL  - 163
ER  -
Download