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  • Hon, MarcUniv Hawaii, Inst Astron, Honolulu, HI 96822 USA. (author)

A close-in giant planet escapes engulfment by its star

  • Article/chapterEnglish2023

Publisher, publication year, extent ...

  • Springer Nature,2023
  • printrdacarrier

Numbers

  • LIBRIS-ID:oai:DiVA.org:uu-510350
  • https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-510350URI
  • https://doi.org/10.1038/s41586-023-06029-0DOI

Supplementary language notes

  • Language:English
  • Summary in:English

Part of subdatabase

Classification

  • Subject category:ref swepub-contenttype
  • Subject category:art swepub-publicationtype

Notes

  • When main-sequence stars expand into red giants, they are expected to engulf close-in planets(1-5). Until now, the absence of planets with short orbital periods around post-expansion, core-helium-burning red giants(6-8) has been interpreted as evidence that short-period planets around Sun-like stars do not survive the giant expansion phase of their host stars(9). Here we present the discovery that the giant planet 8 Ursae Minoris b(10) orbits a core-helium-burning red giant. At a distance of only 0.5 au from its host star, the planet would have been engulfed by its host star, which is predicted by standard single-star evolution to have previously expanded to a radius of 0.7 au. Given the brief lifetime of helium-burning giants, the nearly circular orbit of the planet is challenging to reconcile with scenarios in which the planet survives by having a distant orbit initially. Instead, the planet may have avoided engulfment through a stellar merger that either altered the evolution of the host star or produced 8 Ursae Minoris b as a second-generation planet(11). This system shows that core-helium-burning red giants can harbour close planets and provides evidence for the role of non-canonical stellar evolution in the extended survival of late-stage exoplanetary systems.

Subject headings and genre

Added entries (persons, corporate bodies, meetings, titles ...)

  • Huber, DanielUniv Hawaii, Inst Astron, Honolulu, HI 96822 USA.;Univ Sydney, Sydney Inst Astron SIfA, Sch Phys, Camperdown, NSW, Australia. (author)
  • Rui, Nicholas Z.CALTECH, TAPIR, Pasadena, CA USA. (author)
  • Fuller, JimCALTECH, TAPIR, Pasadena, CA USA. (author)
  • Veras, DimitriUniv Warwick, Ctr Exoplanets & Habitabil, Coventry, England.;Univ Warwick, Ctr Space Domain Awareness, Coventry, England.;Univ Warwick, Dept Phys, Coventry, England. (author)
  • Kuszlewicz, James S.Heidelberg Univ, Ctr Astron Landessternwarte, Heidelberg, Germany.;Aarhus Univ, Stellar Astrophys Ctr, Dept Phys & Astron, Aarhus, Denmark. (author)
  • Kochukhov, OlegUppsala universitet,Observationell astrofysik(Swepub:uu)oko28508 (author)
  • Stokholm, AmalieAarhus Univ, Stellar Astrophys Ctr, Dept Phys & Astron, Aarhus, Denmark.;Univ Bologna, Dipartimento Fis & Astron, Bologna, Italy.;INAF Osservatorio Astrofis & Sci Spazio Bologna, Bologna, Italy. (author)
  • Rørsted, Jakob LysgaardAarhus Univ, Stellar Astrophys Ctr, Dept Phys & Astron, Aarhus, Denmark. (author)
  • Yildiz, MutluEge Univ, Sci Fac, Dept Astron & Space Sci, Izmir, Turkiye. (author)
  • Orhan, Zeynep CelikEge Univ, Sci Fac, Dept Astron & Space Sci, Izmir, Turkiye. (author)
  • Örtel, SibelEge Univ, Sci Fac, Dept Astron & Space Sci, Izmir, Turkiye. (author)
  • Jiang, ChenMax Planck Inst Sonnensyst Forsch, Gottingen, Germany. (author)
  • Hey, Daniel R.Univ Hawaii, Inst Astron, Honolulu, HI 96822 USA. (author)
  • Isaacson, HowardUniv Calif Berkeley, Dept Astron, Berkeley, CA USA. (author)
  • Zhang, JingwenUniv Hawaii, Inst Astron, Honolulu, HI 96822 USA. (author)
  • Vrard, MathieuOhio State Univ, Dept Astron, Columbus, OH USA. (author)
  • Stassun, Keivan G.Vanderbilt Univ, Dept Phys & Astron, Nashville, TN USA. (author)
  • Shappee, Benjamin J.Univ Hawaii, Inst Astron, Honolulu, HI 96822 USA. (author)
  • Tayar, JamieUniv Hawaii, Inst Astron, Honolulu, HI 96822 USA.;Univ Florida, Bryant Space Sci Ctr, Dept Astron, Gainesville, FL USA. (author)
  • Claytor, Zachary R.Univ Hawaii, Inst Astron, Honolulu, HI 96822 USA.;Univ Florida, Bryant Space Sci Ctr, Dept Astron, Gainesville, FL USA. (author)
  • Beard, CoreyUniv Calif Irvine, Dept Phys & Astron, Irvine, CA USA. (author)
  • Bedding, Timothy R.Univ Sydney, Sydney Inst Astron SIfA, Sch Phys, Camperdown, NSW, Australia. (author)
  • Brinkman, CaseyUniv Hawaii, Inst Astron, Honolulu, HI 96822 USA. (author)
  • Campante, Tiago L.Univ Porto, Inst Astrofis & Ciencias Espaco, CAUP, Porto, Portugal.;Univ Porto, Fac Ciencias, Dept Fis & Astron, Porto, Portugal. (author)
  • Chaplin, William J.Univ Birmingham, Sch Phys & Astron, Birmingham, England. (author)
  • Chontos, AshleyUniv Hawaii, Inst Astron, Honolulu, HI 96822 USA.;Princeton Univ, Dept Astrophys Sci, Princeton, NJ USA. (author)
  • Giacalone, StevenMax Planck Inst Sonnensyst Forsch, Gottingen, Germany. (author)
  • Holcomb, RaeUniv Florida, Bryant Space Sci Ctr, Dept Astron, Gainesville, FL USA. (author)
  • Howard, Andrew W.CALTECH, Dept Astron, Pasadena, CA USA. (author)
  • Lubin, JackUniv Florida, Bryant Space Sci Ctr, Dept Astron, Gainesville, FL USA. (author)
  • MacDougall, MasonUniv Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA USA. (author)
  • Montet, Benjamin T.Univ New South Wales, Sch Phys, Sydney, NSW, Australia.;Univ New South Wales, UNSW Data Sci Hub, Sydney, NSW, Australia.;Univ New South Wales, Australian Ctr Astrobiol, Sydney, NSW, Australia. (author)
  • Murphy, Joseph M. A.Univ Calif Santa Cruz, Dept Astron & Astrophys, Santa Cruz, CA USA. (author)
  • Ong, JoelUniv Hawaii, Inst Astron, Honolulu, HI 96822 USA.;Yale Univ, Dept Astron, New Haven, CT USA. (author)
  • Pidhorodetska, DariaUniv Calif Riverside, Dept Earth & Planetary Sci, Riverside, CA USA. (author)
  • Polanski, Alex S.Univ Kansas, Dept Phys & Astron, Lawrence, KS USA. (author)
  • Rice, MalenaYale Univ, Dept Astron, New Haven, CT USA.;MIT, Dept Phys, Cambridge, MA USA.;MIT, Kavli Inst Astrophys & Space Res, Cambridge, MA USA. (author)
  • Stello, DennisUniv Sydney, Sydney Inst Astron SIfA, Sch Phys, Camperdown, NSW, Australia.;Univ New South Wales, Sch Phys, Sydney, NSW, Australia.;ARC Ctr Excellence All Sky Astrophys Three Dimens, Sydney, NSW, Australia. (author)
  • Tyler, DakotahUniv Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA USA. (author)
  • Van Zandt, JudahUniv Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA USA. (author)
  • Weiss, Lauren M.Univ Notre Dame, Dept Phys & Astron, Notre Dame, IN USA. (author)
  • Univ Hawaii, Inst Astron, Honolulu, HI 96822 USA.Univ Hawaii, Inst Astron, Honolulu, HI 96822 USA.;Univ Sydney, Sydney Inst Astron SIfA, Sch Phys, Camperdown, NSW, Australia. (creator_code:org_t)

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  • In:Nature: Springer Nature618:7967, s. 917-9200028-08361476-4687

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