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Spinning up the Surface: Evidence for Planetary Engulfment or Unexpected Angular Momentum Transport?
| Indexado |
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| DOI | 10.3847/1538-4357/AC9312 | ||||
| Año | 2022 | ||||
| Tipo | artículo de investigación |
Citas Totales
Autores Afiliación Chile
Instituciones Chile
% Participación
Internacional
Autores
Afiliación Extranjera
Instituciones
Extranjeras
Abstract
In this paper, we report the potential detection of a nonmonotonic radial rotation profile in a low-mass lower-luminosity giant star. For most low- and intermediate-mass stars, the rotation on the main sequence seems to be close to rigid. As these stars evolve into giants, the core contracts and the envelope expands, which should suggest a radial rotation profile with a fast core and a slower envelope and surface. KIC 9267654, however, seems to show a surface rotation rate that is faster than its bulk envelope rotation rate, in conflict with this simple angular momentum conservation argument. We improve the spectroscopic surface constraint, show that the pulsation frequencies are consistent with the previously published core and envelope rotation rates, and demonstrate that the star does not show strong chemical peculiarities. We discuss the evidence against any tidally interacting stellar companion. Finally, we discuss the possible origin of this unusual rotation profile, including the potential ingestion of a giant planet or unusual angular momentum transport by tidal inertial waves triggered by a close substellar companion, and encourage further observational and theoretical efforts.
| Ord. | Autor | Género | Institución - País |
|---|---|---|---|
| 1 | Tayar, J. | Mujer |
University of Florida - Estados Unidos
University Hawaii Institute for Astronomy - Estados Unidos UNIV FLORIDA - Estados Unidos Univ Hawaii Manoa - Estados Unidos College of Liberal Arts and Sciences - Estados Unidos |
| 2 | Moyano, Facundo D. | - |
Faculty of Science - Suiza
Univ Geneva - Suiza |
| 3 | Soares-Furtado, Melinda | - |
University of Wisconsin-Madison - Estados Unidos
UNIV WISCONSIN - Estados Unidos |
| 4 | Escorza, A. | - |
European Southern Observatory Santiago - Chile
ESO - Chile European Southern Observ - Chile |
| 5 | Joyce, Meridith | - |
Space Telescope Science Institute - Estados Unidos
Space Telescope Sci Inst - Estados Unidos |
| 6 | Martell, S. | Mujer |
UNSW Sydney - Australia
Centre of Excellence for All-Sky Astrophysics in Three Dimensions (ASTRO 3D) - Australia Univ New South Wales - Australia Ctr Excellence All Sky Astrophys Three Dimens AST - Australia |
| 7 | GARCIA-DIAS, RAFAEL AUGUSTO | Hombre |
Universite Paris-Saclay - Francia
Univ Paris Saclay - Francia |
| 8 | Breton, Sylvain N. | - |
Universite Paris-Saclay - Francia
Univ Paris Saclay - Francia |
| 9 | Mathis, Stéphane | Hombre |
Universite Paris-Saclay - Francia
Univ Paris Saclay - Francia |
| 10 | Mathur, Savita | Mujer |
Instituto Astrofisico de Canarias - España
Universidad de La Laguna - España Inst Astrofis Canarias IAC - España Univ La Laguna ULL - España |
| 11 | Delsanti, Vincent | - |
CentraleSupélec - Paris-Saclay - Francia
Universite Paris-Saclay - Francia Cent Supelec - Francia UNIV PARIS - Francia |
| 12 | Kiefer, Sven | - |
KU Leuven - Bélgica
Institut fur Weltraumforschung - Austria Technische Universitat Graz - Austria Katholieke Univ Leuven - Bélgica Austrian Acad Sci - Austria Graz Univ Technol - Austria |
| 13 | Reffert, S. | Mujer |
Landessternwarte Heidelberg - Alemania
Heidelberg Univ - Alemania |
| 14 | Bowman, D. M. | Hombre |
KU Leuven - Bélgica
Katholieke Univ Leuven - Bélgica |
| 15 | van Reeth, Timothy | Hombre |
KU Leuven - Bélgica
Katholieke Univ Leuven - Bélgica |
| 16 | Shetye, Shreeya | - |
Ecole Polytechnique Fédérale de Lausanne - Suiza
Ecole Polytech Fed Lausanne EPFL - Suiza |
| 17 | Gehan, Charlotte | - |
Max Planck Institute for Solar System Research - Alemania
Centro de Astrofísica da Universidade do Porto - Portugal Max Planck Inst Sonnensyst Forsch - Alemania Univ Porto - Portugal |
| 18 | Grunblatt, Samuel K. | Hombre |
American Museum of Natural History - Estados Unidos
Simons Foundation - Estados Unidos AMER MUSEUM NAT HIST - Estados Unidos Flatiron Inst - Estados Unidos |
| Fuente |
|---|
| National Science Foundation |
| European Union |
| Universidad Nacional Autónoma de México |
| Australian Research Council |
| Vanderbilt University |
| Yale University |
| National Aeronautics and Space Administration |
| Alfred P. Sloan Foundation |
| U.S. Department of Energy Office of Science |
| University of Arizona |
| Brazilian Participation Group |
| Carnegie Mellon University |
| French Participation Group |
| Instituto de Astrofisica de Canarias |
| Johns Hopkins University |
| Lawrence Berkeley National Laboratory |
| New Mexico State University |
| New York University |
| University of Portsmouth |
| University of Utah |
| University of Virginia |
| University of Washington |
| NASA Science Mission directorate |
| Office of Science |
| California Department of Fish and Game |
| Carnegie Institution for Science |
| Chilean Participation Group |
| Kavli Institute for the Physics and Mathematics of the Universe (IPMU)/University of Tokyo |
| Korean Participation Group |
| Leibniz Institut fur Astrophysik Potsdam (AIP) |
| Max-Planck-Institut fur Astronomie (MPIA Heidelberg) |
| Max-Planck-Institut fur Astrophysik (MPA Garching) |
| Max-Planck-Institut fur Extraterrestrische Physik (MPE) |
| National Astronomical Observatories of China |
| University of Notre Dame |
| Observatario Nacional/MCTI |
| United Kingdom Participation Group |
| University of Colorado Boulder |
| University of Oxford |
| University of Wisconsin |
| NASA through Hubble Fellowship - Space Telescope Science Institute |
| Space Telescope Science Institute |
| FWO |
| Fonds Wetenschappelijk Onderzoek |
| Observatoire de Geneve, Switzerland |
| Fonds National de la Recherche Scientifique (F.R.S.-FNRS), Belgium |
| Royal Observatory of Belgium |
| Research Foundation Flanders (FWO) |
| Fonds De La Recherche Scientifique - FNRS |
| NASA through the NASA Hubble Fellowship - Space Telescope Science Institute |
| Association of Universities for Research in Astronomy, Inc., under NASA |
| Thuringer Landessternwarte Tautenburg |
| Research Council of KU Leuven, Belgium |
| Thuringer Landessternwarte Tautenburg, Germany |
| DFG priority program |
| Commissariat à l'Énergie Atomique et aux Énergies Alternatives |
| Australian Research Council through Discovery Project |
| Research Foundation Flanders (FWO), Belgium |
| European Union H2020-MSCA-ITN-2019 |
| Center for Astrophysics | Harvard Smithsonian |
| PLATO CNES |
| GOLF |
| Ohio State University, Pennsylvania State University, Shanghai Astronomical Observatory |
| Agradecimiento |
|---|
| We thank the referee for an efficient and helpful report. We thank Carles Badenes, Christine Daher, Daniel Huber, Anne Hedlund, and Lisa Bugnet for the helpful discussions that contributed to this paper. We also thank the members of the rotation working group at the KITP Transport in Stars 2021 program for input on this paper, and therefore acknowledge that this research was supported in part by the National Science Foundation under grant No. NSF PHY-1748958. |
| S.L.M. acknowledges the support of the Australian Research Council through Discovery Project grant DP180101791. |
| D.M.B. and T.V.R. gratefully acknowledge funding from the Research Foundation Flanders (FWO) by means of senior and junior postdoctoral fellowships with grant agreements 1286521N and 12ZB620N, respectively, and FWO long stay travel grants V411621N and V414021N, respectively. |
| M.S.F. gratefully acknowledges the support provided by NASA through Hubble Fellowship grant HST-HF2-51493.001-A awarded by the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, In., for NASA, under the contract NAS5-26555. |
| Based on observations obtained with the HERMES spectrograph, which is supported by the Research Foundation Flanders (FWO), Belgium, the Research Council of KU Leuven, Belgium, the Fonds National de la Recherche Scientifique (F.R.S.-FNRS), Belgium, the Royal Observatory of Belgium, the Observatoire de Genève, Switzerland and the Thüringer Landessternwarte Tautenburg, Germany. |
| Support for this work was provided by NASA through the NASA Hubble Fellowship grant No. 51424 awarded by the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., for NASA, under contract NAS5-26555. S.K. acknowledges funding from the European Union H2020-MSCA-ITN-2019 under grant agreement No. 860470 (CHAMELEON). |
| This work has made use of data from the European Space Agency (ESA) mission Gaia ( https://www.cosmos.esa.int/gaia ), processed by the Gaia Data Processing and Analysis Consortium (DPAC, https://www.cosmos.esa.int/web/gaia/dpac/consortium ). Funding for the DPAC has been provided by national institutions, in particular the institutions participating in the Gaia Multilateral Agreement. |
| This paper includes data collected by the Kepler mission and obtained from the MAST data archive at the Space Telescope Science Institute (STScI). Funding for the Kepler mission is provided by the NASA Science Mission Directorate. STScI is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS5-26555. |
| R.A.G., S.N.B, and S.M. acknowledge the support from GOLF and PLATO CNES grants at CEA Paris-Saclay. |
| We thank the referee for an efficient and helpful report. We thank Carles Badenes, Christine Daher, Daniel Huber, Anne Hedlund, and Lisa Bugnet for the helpful discussions that contributed to this paper. We also thank the members of the rotation working group at the KITP Transport in Stars 2021 program for input on this paper, and therefore acknowledge that this research was supported in part by the National Science Foundation under grant No. NSF PHY-1748958. |
| SDSS-IV is managed by the Astrophysical Research Consortium for the Participating Institutions of the SDSS Collaboration including the Brazilian Participation Group, the Carnegie Institution for Science, Carnegie Mellon University, Center for Astrophysics | Harvard & Smithsonian, the Chilean Participation Group, the French Participation Group, Instituto de Astrofisica de Canarias, The Johns Hopkins University, Kavli Institute for the Physics and Mathematics of the Universe (IPMU)/University of Tokyo, the Korean Participation Group, Lawrence Berkeley National Laboratory, Leibniz Institut fur Astrophysik Potsdam (AIP), Max-Planck-Institut fur Astronomie (MPIA Heidelberg), Max-Planck-Institut fur Astrophysik (MPA Garching), Max-Planck-Institut fur Extraterrestrische Physik (MPE), National Astronomical Observatories of China, New Mexico State University, New York University, University of Notre Dame, Observatario Nacional/MCTI, The Ohio State University, Pennsylvania State University, Shanghai Astronomical Observatory, United Kingdom Participation Group, Universidad Nacional Autonoma de Mexico, University of Arizona, University of Colorado Boulder, University of Oxford, University of Portsmouth, University of Utah, University of Virginia, University of Washington, University of Wisconsin, Vanderbilt University, and Yale University. |
