NGTS-8b and NGTS-9b non-inflated hot Jupiters Virtual Observatory Resource

Authors
  1. Costes J.C.
  2. Watson C.A.
  3. Belardi C.
  4. Braker I.P.
  5. Burleigh M.R.,Casewell S.L.
  6. Eigmuller P.
  7. Gunther M.N.
  8. Jackman J.A.G.
  9. Nielsen L.D.,Soto M.G.
  10. Turner O.
  11. Anderson D.R.
  12. Bayliss D.
  13. Bouchy F.
  14. Briegal J.T.,Bryant E.M.
  15. Cabrera J.
  16. Chaushev A.
  17. Csizmadia S.
  18. Erikson A.
  19. Gill S.,Gillen E.
  20. Goad M.R.
  21. Hodgkin S.
  22. Hooton M.J.
  23. Jenkins J.S.
  24. McCormac J.,Moyano M.
  25. Queloz D.
  26. Rauer H.
  27. Raynard L.
  28. Smith A.M.S.
  29. Thompson A.P.G.,Tilbrook R.H.
  30. Udry S.
  31. Vines J.I.
  32. West R.G.
  33. Wheatley P.J.
  34. Published by
    CDS
Abstract

We report the discovery, by the next generation transit survey (NGTS), of two hot Jupiters NGTS-8b and NGTS-9b. These orbit a V=13.68 K0V star (T_eff_=5241+/-50K) with a period of 2.49970d, and a V=12.80 F8V star (T_eff_=6330+/-130K) in 4.43527d, respectively. The transits were independently verified by follow-up photometric observations with the South African Astronomical Observatory 1.0-m and Euler telescopes, and we report on the planetary parameters using HARPS, FEROS, and CORALIE radial velocities. NGTS-8b has a mass, 0.93^+0.04^_-0.03_M_J_ and a radius, 1.09+/-0.03R_J_ similar to Jupiter, resulting in a density of 0.89^+0.08^_-0.07_gcm^-3^. This is in contrast to NGTS-9b, which has a mass of 2.90+/-0.17M_J_ and a radius of 1.07+/-0.06R_J_, resulting in a much greater density of 2.93^+0.53^_-0.49_gcm^-3^. Statistically, the planetary parameters put both objects in the regime where they would be expected to exhibit larger than predicted radii. However, we find that their radii are in agreement with predictions by theoretical non-inflated models.

Keywords
  1. Exoplanets
  2. Photometry
  3. Optical astronomy
  4. Spectroscopy
  5. Stellar masses
  6. Stellar radii
  7. Effective temperature
  8. Trigonometric parallax
  9. Proper motions
  10. Radial velocity
  11. Stellar ages
Bibliographic source Bibcode
2020MNRAS.491.2834C
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/491/2834
IVOA Identifier IVOID
ivo://CDS.VizieR/J/MNRAS/491/2834

Access

Web browser access HTML
http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/491/2834
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/491/2834
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/491/2834
IVOA Table Access TAP
http://tapvizier.cds.unistra.fr/TAPVizieR/tap
Run SQL-like queries with TAP-enabled clients (e.g., TOPCAT).
IVOA Cone Search SCS
For use with a cone search client (e.g., TOPCAT).
http://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/491/2834/table6?
https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/491/2834/table6?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/491/2834/table6?
IVOA Cone Search SCS
For use with a cone search client (e.g., TOPCAT).
http://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/491/2834/table7?
https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/491/2834/table7?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/491/2834/table7?
IVOA Cone Search SCS
For use with a cone search client (e.g., TOPCAT).
http://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/491/2834/table8?
https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/491/2834/table8?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/491/2834/table8?
IVOA Cone Search SCS
For use with a cone search client (e.g., TOPCAT).
http://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/491/2834/table9?
https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/491/2834/table9?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/491/2834/table9?

History

2023-04-13T15:20:31Z
Resource record created
2023-04-13T15:20:31Z
Created
2023-05-04T13:31:57Z
Updated

Contact

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CDS support team
Postal Address
CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France
E-Mail
cds-question@unistra.fr