TESS-Keck Survey. XIII. TOI-1272 radial velocity Virtual Observatory Resource

Authors
  1. MacDougall M.G.
  2. Petigura E.A.
  3. Fetherolf T.
  4. Beard C.
  5. Lubin J.
  6. Angelo I.,Batalha N.M.
  7. Behmard A.
  8. Blunt S.
  9. Brinkman C.
  10. Chontos A.,Crossfield I.J.M.
  11. Dai F.
  12. Dalba P.A.
  13. Dressing C.
  14. Fulton B.
  15. Giacalone S.,Hill M.L.
  16. Howard A.W.
  17. Huber D.
  18. Isaacson H.
  19. Kane S.R.
  20. Kosiarek M.,Mayo A.
  21. Mocnik T.
  22. Akana Murphy J.M.
  23. Pidhorodetska D.
  24. Polanski A.,Rice M.
  25. Robertson P.
  26. Rosenthal L.J.
  27. Roy A.
  28. Rubenzahl R.A.
  29. Scarsdale N.,Turtelboom E.V.
  30. Tyler D.
  31. Van Zandt J.
  32. Weiss L.M.
  33. Esparza-Borges E.,Fukui A.
  34. Isogai K.
  35. Kawauchi K.
  36. Mori M.
  37. Murgas F.
  38. Narita N.,Nishiumi T.
  39. Palle E.
  40. Parviainen H.
  41. Watanabe N.
  42. Jenkins J.M.,Latham D.W.
  43. Ricker G.R.
  44. Seager S.
  45. Vanderspek R.K.
  46. Winn J.N.
  47. Bieryla A.,Caldwell D.A.
  48. Dragomir D.,Fausnaugh M.M.
  49. Mireles I.
  50. Rodriguez D.R.
  51. Published by
    CDS
Abstract

We report the discovery of an eccentric hot Neptune and a non-transiting outer planet around TOI-1272. We identified the eccentricity of the inner planet, with an orbital period of 3.3days and Rp,b=4.1{+/-}0.2R{Earth}, based on a mismatch between the observed transit duration and the expected duration for a circular orbit. Using ground-based radial velocity (RV) measurements from the HIRES instrument at the Keck Observatory, we measured the mass of TOI-1272b to be Mp,b=25{+/-}2M{Earth}. We also confirmed a high eccentricity of eb=0.34{+/-}0.06, placing TOI-1272b among the most eccentric well-characterized sub-Jovians. We used these RV measurements to also identify a non-transiting outer companion on an 8.7day orbit with a similar mass of Mp,csin(i)=27{+/-}3M{Earth} and ec<~0.35. Dynamically stable planet-planet interactions have likely allowed TOI-1272b to avoid tidal eccentricity decay despite the short circularization timescale expected for a close-in eccentric Neptune. TOI-1272b also maintains an envelope mass fraction of fenv~11% despite its high equilibrium temperature, implying that it may currently be undergoing photoevaporation. This planet joins a small population of short-period Neptune-like planets within the "Hot Neptune Desert" with a poorly understood formation pathway.

Keywords
  1. exoplanets
  2. high-velocity-stars
  3. visible-astronomy
  4. spectroscopy
  5. radial-velocity
Bibliographic source Bibcode
2022AJ....164...97M
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/164/97
IVOA Identifier IVOID
ivo://CDS.VizieR/J/AJ/164/97
Document Object Identifer DOI
doi:10.26093/cds/vizier.51640097

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http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/164/97
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History

2022-12-01T10:00:33Z
Resource record created
2022-12-01T10:00:33Z
Created
2023-01-16T07:50:37Z
Updated

Contact

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