| Title: |
NGTS discovery of a highly inflated Saturn-mass planet and a highly irradiated hot Jupiter |
| Authors: |
Bouchy, F; Gillen, E; Turner, O; Gill, S; Nielsen, LD; Lendl, M; Vines, JI; Alves, DR; Anderson, DR; Armstrong, DJ; Bayliss, D; Jenkins, JS; Acton, JS; Belardi, C; Bryant, EM; Burleigh, MR; Casewell, SL; Costes, JC; Chaushev, A; Cooke, BF; Eigmüller, P; Erikson, A; Günther, MN; Goad, MR; Grieves, N; McCormac, J; Moyano, M; Raynard, L; Smith, AMS; Tilbrook, RH; Udry, S; Watson, CA; West, RG; Wheatley, PJ |
| Source: |
Astronomy and Astrophysics , 684 , Article A201. (2024) |
| Publisher Information: |
EDP Sciences |
| Publication Year: |
2024 |
| Collection: |
University College London: UCL Discovery |
| Subject Terms: |
Techniques: photometric / planets and satellites: detection / planets and satellites: individual: NGTS-26 b / planets and satellites: individual: NGTS-27 b / planetary systems |
| Description: |
We report the discovery of two new transiting giant exoplanets NGTS-26 b and NGTS-27 b by the Next Generation Transit Survey (NGTS). NGTS-26 b orbits around a G6-type main sequence star every 4.52 days. It has a mass of 0.29-0.06+0.07 MJup and a radius of 1.33-0.05+0.06 RJup making it a Saturn-mass planet with a highly inflated radius. NGTS-27 b orbits around a slightly evolved G3-type star every 3.37 days. It has a mass of 0.59-0.07+0.10 MJup and a radius of 1.40±0.04 RJup, making it a relatively standard hot Jupiter. The transits of these two planetary systems were re-observed and confirmed in photometry by the SAAO 1.0-m telescope, 1.2-m Euler Swiss telescope as well as the TESS spacecraft, and their masses were derived spectroscopically by the CORALIE, FEROS and HARPS spectrographs. Both giant exoplanets are highly irradiated by their host stars and present an anomalously inflated radius, especially NGTS-26 b which is one of the largest objects among peers of similar mass. |
| Document Type: |
article in journal/newspaper |
| File Description: |
text |
| Language: |
English |
| Relation: |
https://discovery.ucl.ac.uk/id/eprint/10191995/ |
| Availability: |
https://discovery.ucl.ac.uk/id/eprint/10191995/1/aa47162-23.pdf; https://discovery.ucl.ac.uk/id/eprint/10191995/ |
| Rights: |
open |
| Accession Number: |
edsbas.8E541553 |
| Database: |
BASE |