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Company for the Ult...
Company for the Ultra-high Density, Ultra-short Period Sub-Earth GJ 367 b: Discovery of Two Additional Low-mass Planets at 11.5 and 34 Days
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- Goffo, Elisa (författare)
- University of Turin,Universita degli Studi di Torino,Thüringer Landessternwarte Tautenburg,Univ Torino, Dipartimento Fis, Via Pietro Giuria 1, I-10125 Turin, Italy.;Thuringer Landessternwarte Tautenburg, Sternwarte 5, D-07778 Tautenburg, Germany.
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- Gandolfi, Davide (författare)
- University of Turin,Universita degli Studi di Torino,Univ Torino, Dipartimento Fis, Via Pietro Giuria 1, I-10125 Turin, Italy.
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- Egger, Jo Ann (författare)
- University of Bern,Universität Bern,Univ Bern, Phys Inst, Gesell Str 6, CH-3012 Bern, Switzerland.
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visa fler...
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- Mustill, Alexander J. (författare)
- Lund University,Lunds universitet,Astrofysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Astrophysics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH,Lund Univ, Dept Phys, Div Astrophys, Lund Observ, POB 43, SE-22100 Lund, Sweden.;Lund Univ, Dept Astron & Theoret Phys, Lund Observ, POB 43, SE-22100 Lund, Sweden.
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- Albrecht, Simon H. (författare)
- Aarhus University,Århus Universitet,Thüringer Landessternwarte Tautenburg,Aarhus Univ, Stellar Astrophys Ctr, Dept Phys & Astron, Ny Munkegade 120, DK-8000 Aarhus C, Denmark.
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- Hirano, Teruyuki (författare)
- National Astronomical Observatory of Japan,National Institutes of Natural Sciences (NINS),Astrobiol Ctr, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan.;Natl Astron Observ Japan, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan.
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- Kochukhov, Oleg (författare)
- Uppsala University,Uppsala universitet,Observationell astrofysik
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- Astudillo-Defru, Nicola (författare)
- Universidad Católica de la Santísima Concepción,Universidad Catolica de la Santisima Concepcion,Univ Catolica Santisima Concepcion, Dept Matemat & Fis Aplicadas, Alonso de Rivera 2850, Concepcion, Chile.
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- Barragan, Oscar (författare)
- University of Oxford,University Of Oxford,Univ Oxford, Subdept Astrophys, Dept Phys, Oxford OX1 3RH, England.
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- Serrano, Luisa M. (författare)
- University of Turin,Universita degli Studi di Torino,Univ Torino, Dipartimento Fis, Via Pietro Giuria 1, I-10125 Turin, Italy.
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- Hatzes, Artie P. (författare)
- Thuringer Landessternwarte Tautenburg, Sternwarte 5, D-07778 Tautenburg, Germany.
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- Alibert, Yann (författare)
- Universität Bern,University of Bern,Univ Bern, Phys Inst, Gesell Str 6, CH-3012 Bern, Switzerland.;Univ Bern, Ctr Space & Habitabil, Gesell Str 6, CH-3012 Bern, Switzerland.
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- Guenther, Eike (författare)
- Thüringer Landessternwarte Tautenburg,Thuringer Landessternwarte Tautenburg, Sternwarte 5, D-07778 Tautenburg, Germany.
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- Dai, Fei (författare)
- California Institute of Technology (Caltech),Div Geol & Planetary Sci, 1200 Calif Blvd, Pasadena, CA 91125 USA.;CALTECH, Dept Astron, Pasadena, CA 91125 USA.
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- Lam, Kristine W.~F. (författare)
- Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR),German Aerosp Ctr DLR, Inst Planetary Res, Rutherfordstr 2, D-12489 Berlin, Germany.
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- Csizmadia, Szilárd (författare)
- Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR),German Aerosp Ctr DLR, Inst Planetary Res, Rutherfordstr 2, D-12489 Berlin, Germany.
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- Smith, Alexis M.~S. (författare)
- Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR),Massachusetts Institute of Technology (MIT),German Aerosp Ctr DLR, Inst Planetary Res, Rutherfordstr 2, D-12489 Berlin, Germany.,MIT, Dept Earth Atmospher & Planetary Sci, Cambridge, MA 02139 USA.;MIT, Dept Phys, Cambridge, MA 02139 USA.;MIT, Kavli Inst Astrophys & Space Res, Cambridge, MA 02139 USA.;MIT, Dept Aeronaut & Astronaut, Cambridge, MA 02139 USA.
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- Fossati, Luca (författare)
- Austrian Acad Sci, Space Res Inst, Schmiedlstr 6, A-8042 Graz, Austria.
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- Luque, Rafael (författare)
- University of Chicago,Univ Chicago, Dept Astron & Astrophys, Chicago, IL 60637 USA.
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- Rodler, Florian (författare)
- European Southern Observatory Santiago,European Southern Observ, Alonso de Cordova 3107, Santiago Se Chile, Chile.
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- Winther, Mark L. (författare)
- Århus Universitet,Aarhus University,Aarhus Univ, Stellar Astrophys Ctr, Dept Phys & Astron, Ny Munkegade 120, DK-8000 Aarhus C, Denmark.
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- Rørsted, Jakob L. (författare)
- Århus Universitet,Aarhus University,Aarhus Univ, Stellar Astrophys Ctr, Dept Phys & Astron, Ny Munkegade 120, DK-8000 Aarhus C, Denmark.
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- Alarcon, Javier (författare)
- European Southern Observatory Santiago,European Southern Observ, Alonso de Cordova 3107, Santiago Se Chile, Chile.
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- Bonfils, Xavier (författare)
- Univ Grenoble Alpes, CNRS, IPAG, F-38000 Grenoble, France.
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- Cochran, William D. (författare)
- The University of Texas at Austin, USA,Univ Texas Austin, McDonald Observ, Austin, TX USA.;Univ Texas Austin, Ctr Planetary Syst Habitabil, Austin, TX USA.
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- Deeg, Hans J. (författare)
- Instituto de Astrofísica de Canarias,Universidad de la Laguna,University of La Laguna,Inst Astrofis Canarias IAC, E-38205 San Cristobal la Laguna, Tenerife, Spain.;Univ La Laguna ULL, Dept Astrofis, E-38206 San Cristobal la Laguna, Tenerife, Spain.
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- Jenkins, Jon M. (författare)
- NASA Ames Research Center,Universidad de la Laguna,University of La Laguna,Instituto de Astrofísica de Canarias,NASA Ames Res Ctr, Moffett Field, CA 94035 USA.
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- Korth, Judith (författare)
- Lund University,Lunds universitet,Astrofysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Astrophysics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH,Lund Univ, Dept Phys, Div Astrophys, Lund Observ, POB 43, SE-22100 Lund, Sweden.
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- Livingston, John H. (författare)
- National Astronomical Observatory of Japan,National Institutes of Natural Sciences (NINS),The Graduate University for Advanced Studies (SOKENDAI),Astrobiol Ctr, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan.;Natl Astron Observ Japan, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan.;Grad Univ Adv Studies SOKENDAI, Sch Phys Sci, Dept Astron Sci, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan.
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- Meech, Annabella (författare)
- University Of Oxford,Univ Oxford, Dept Phys, Keble Rd, Oxford OX1 3RH, England.
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- Murgas, Felipe (författare)
- Instituto de Astrofísica de Canarias,Universidad de la Laguna,University of La Laguna,Inst Astrofis Canarias IAC, E-38205 San Cristobal la Laguna, Tenerife, Spain.;Univ La Laguna ULL, Dept Astrofis, E-38206 San Cristobal la Laguna, Tenerife, Spain.
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- Orell-Miquel, Jaume (författare)
- Inst Astrofis Canarias IAC, E-38205 San Cristobal la Laguna, Tenerife, Spain.;Univ La Laguna ULL, Dept Astrofis, E-38206 San Cristobal la Laguna, Tenerife, Spain.
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- Osborne, Hannah L.~M. (författare)
- University College London (UCL),Univ Coll London, Mullard Space Sci Lab, Dorking RH5 6NT, Surrey, England.
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- Palle, Enric (författare)
- Instituto de Astrofísica de Canarias,Universidad de la Laguna,University of La Laguna,Inst Astrofis Canarias IAC, E-38205 San Cristobal la Laguna, Tenerife, Spain.;Univ La Laguna ULL, Dept Astrofis, E-38206 San Cristobal la Laguna, Tenerife, Spain.
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- Persson, Carina, 1964 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology,Chalmers Univ Technol, Dept Space Earth & Environm, Onsala Space Observ, SE-43992 Onsala, Sweden.
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- Redfield, Seth (författare)
- Wesleyan University,Wesleyan Univ, Astron Dept, Middletown, CT 06459 USA.;Wesleyan Univ, Van Vleck Observ, Middletown, CT 06459 USA.
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- Ricker, George R. (författare)
- Massachusetts Institute of Technology (MIT),MIT, Kavli Inst Astrophys & Space Res, Cambridge, MA 02139 USA.;MIT, Phys Dept, Cambridge, MA USA.
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Seager, Sara (författare)
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- Vanderspek, Roland (författare)
- Massachusetts Institute of Technology (MIT),MIT, Dept Phys, Cambridge, MA 02139 USA.;MIT, Kavli Inst Astrophys & Space Res, Cambridge, MA 02139 USA.
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- Van Eylen, Vincent (författare)
- University College London (UCL),Univ Coll London, Mullard Space Sci Lab, Dorking RH5 6NT, Surrey, England.
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- Winn, Joshua N. (författare)
- Princeton University,Princeton Univ, Dept Astrophys Sci, Princeton, NJ 08544 USA.
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(creator_code:org_t)
- Institute of Physics (IOP), 2023
- 2023
- Engelska.
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Ingår i: Astrophysical Journal Letters. - : Institute of Physics (IOP). - 2041-8213 .- 2041-8205. ; 955:1
- Relaterad länk:
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http://dx.doi.org/10... (free)
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https://research.cha... (primary) (free)
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https://doi.org/10.3...
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https://uu.diva-port... (primary) (Raw object)
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https://lup.lub.lu.s...
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https://doi.org/10.3...
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https://research.cha...
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https://urn.kb.se/re...
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Abstract
Ämnesord
Stäng
- GJ 367 is a bright (V ≈ 10.2) M1 V star that has been recently found to host a transiting ultra-short period sub-Earth on a 7.7 hr orbit. With the aim of improving the planetary mass and radius and unveiling the inner architecture of the system, we performed an intensive radial velocity follow-up campaign with the HARPS spectrograph—collecting 371 high-precision measurements over a baseline of nearly 3 yr—and combined our Doppler measurements with new TESS observations from sectors 35 and 36. We found that GJ 367 b has a mass of M b = 0.633 ± 0.050 M ⊕ and a radius of R b = 0.699 ± 0.024 R ⊕, corresponding to precisions of 8% and 3.4%, respectively. This implies a planetary bulk density of ρ b = 10.2 ± 1.3 g cm−3, i.e., 85% higher than Earth’s density. We revealed the presence of two additional non-transiting low-mass companions with orbital periods of ∼11.5 and 34 days and minimum masses of M c sin i c = 4.13 ± 0.36 M ⊕ and M d sin i d = 6.03 ± 0.49 M ⊕, respectively, which lie close to the 3:1 mean motion commensurability. GJ 367 b joins the small class of high-density planets, namely the class of super-Mercuries, being the densest ultra-short period small planet known to date. Thanks to our precise mass and radius estimates, we explored the potential internal composition and structure of GJ 367 b, and found that it is expected to have an iron core with a mass fraction of 0.91 − 0.23 + 0.07 . How this iron core is formed and how such a high density is reached is still not clear, and we discuss the possible pathways of formation of such a small ultra-dense planet.
Ämnesord
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Nyckelord
- Exoplanet detection methods
- Exoplanet systems
- Exoplanets
- Extrasolar rocky planets
- Astrophysics - Earth and Planetary Astrophysics
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Goffo, Elisa
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Gandolfi, Davide
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Egger, Jo Ann
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Mustill, Alexand ...
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Albrecht, Simon ...
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Hirano, Teruyuki
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visa fler...
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Kochukhov, Oleg
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Astudillo-Defru, ...
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Barragan, Oscar
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Serrano, Luisa M ...
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Hatzes, Artie P.
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Alibert, Yann
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Guenther, Eike
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Dai, Fei
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Lam, Kristine W. ...
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Csizmadia, Szilá ...
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Smith, Alexis M. ...
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Fossati, Luca
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Luque, Rafael
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Rodler, Florian
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Winther, Mark L.
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Rørsted, Jakob L ...
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Alarcon, Javier
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Bonfils, Xavier
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Cochran, William ...
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Deeg, Hans J.
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Jenkins, Jon M.
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Korth, Judith
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Livingston, John ...
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Meech, Annabella
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Murgas, Felipe
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Orell-Miquel, Ja ...
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Osborne, Hannah ...
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Palle, Enric
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Persson, Carina, ...
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Redfield, Seth
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Ricker, George R ...
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Seager, Sara
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Vanderspek, Rola ...
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Van Eylen, Vince ...
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Winn, Joshua N.
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