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Tytuł artykułu

OGLE-2017-BLG-1434Lb: Eighth q<1×10-4 Mass-Ratio Microlens Planet Confirms Turnover in Planet Mass-Ratio Function

Autorzy
Udalski A. , Ryu Y.-H. , Sajadian S. , Gould A. , Mróz P. , Poleski R. , Szymański M. K. , Skowron J. , Soszyński I. , Kozłowski S. , Pietrukowicz P. , Ulaczyk K. , Pawlak M. , Rybicki K. , Iwanek P. , Albrow M. D. , Chung S. -J. , Han C. , Hwang K.-H. , Jung Y. K. , Shin I.-G. , Shvartzvald Y. , Yee J. C. , Zang W. , Zhu W. , Cha S.-M. , Kim D.-J. , Kim H.-W. , Kim S.-L. , Lee C.-U. , Lee D.-J , Lee Y. , Park B.-G. , Pogge R. W. , Bozza W. , Dominik M. , Helling C. , Hundertmark M. , Jørgensen U. G. , Longa-Peña P. , Lowry S. , Burgdorf M. , Campbell-White J. , Ciceri S. , Evans D. , Jaimes R. F. , Fujii Y. I. , Haikala L. K. , Henning T. , Hinse T. C. , Mancini L. , Peixinho N. , Rahvar S. , Rabus M. , Skottfelt J. , Snodgrass C. , Southworth J. , von Essen C.
Wybrane pełne teksty z tego czasopisma
Identyfikatory
DOI
10.32023/0001-5237/68.1.1
Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
We report the discovery of a cold Super-Earth planet (mp=4.4±0.5 M⊕) orbiting a low-mass (M=0.23±0.03 M⊙) M dwarf at projected separation a⊥=1.18±0.10 a.u., i.e., about 1.9 times the distance the snow line. The system is quite nearby for a microlensing planet, DL=0.86±0.09 kpc. Indeed, it was the large lens-source relative parallax πrel=1.0 mas (combined with the low mass M) that gave rise to the large, and thus well-measured, "microlens parallax" πE∝(πrel/M)1/2 that enabled these precise measurements. OGLE-2017-BLG-1434Lb is the eighth microlensing planet with planet-host mass ratio q<1×10-4. We apply a new planet-detection sensitivity method, which is a variant of "V/Vmax", to seven of these eight planets to derive the mass-ratio function in this regime. We find dN/d lnq ∝ qp, with p=1.05+0.78-0.68, which confirms the "turnover" in the mass function found by Suzuki et al. relative to the power law of opposite sign n=-0.93±0.13 at higher mass ratios q≳2×10-4. We combine our result with that of Suzuki et al. to obtain p=0.73+0.42-0.34.
Słowa kluczowe
EN
Wydawca
Copernicus Foundation for Polish Astronomy
Czasopismo
Acta Astronomica
Rocznik
2018
Tom
Vol. 68, No. 1
Strony
1--42
Opis fizyczny
Bibliogr. 65 poz., tab., wykr.
Twórcy
autor
Udalski A.
  • Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warszawa, Poland
autor
Ryu Y.-H.
  • Korea Astronomy and Space Science Institute, Daejon 34055, Korea
autor
Sajadian S.
  • Department of Physics, Isfahan University of Technology, Isfahan 84156-83111, Iran
autor
Gould A.
  • Korea Astronomy and Space Science Institute, Daejon 34055, Korea
  • Max-Planck-Institute for Astronomy, Königstuhl 17, 69117 Heidelberg, Germany
  • Department of Astronomy, Ohio State University, 140 W. 18th Ave., Columbus, OH43210, USA
autor
Mróz P.
  • Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warszawa, Poland
  • (OGLE Collaboration)
autor
Poleski R.
  • Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warszawa, Poland
  • Department of Astronomy, Ohio State University, 140 W. 18th Ave., Columbus, OH43210, USA
  • (OGLE Collaboration)
autor
Szymański M. K.
  • Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warszawa, Poland
  • (OGLE Collaboration)
autor
Skowron J.
  • Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warszawa, Poland
  • (OGLE Collaboration)
autor
Soszyński I.
  • Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warszawa, Poland
  • (OGLE Collaboration)
autor
Kozłowski S.
  • Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warszawa, Poland
  • (OGLE Collaboration)
autor
Pietrukowicz P.
  • Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warszawa, Poland
  • (OGLE Collaboration)
autor
Ulaczyk K.
  • Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warszawa, Poland
  • (OGLE Collaboration)
autor
Pawlak M.
  • Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warszawa, Poland
  • (OGLE Collaboration)
autor
Rybicki K.
  • Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warszawa, Poland
  • (OGLE Collaboration)
autor
Iwanek P.
  • Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warszawa, Poland
  • (OGLE Collaboration)
autor
Albrow M. D.
  • University of Canterbury, Department of Physics and Astronomy, Private Bag 4800, Christchurch 8020, New Zealand
  • (KMTNet Collaboration)
autor
Chung S. -J.
  • Korea Astronomy and Space Science Institute, Daejon 34055, Korea
  • Korea University of Science and Technology, Daejeon 34113, Korea
  • (KMTNet Collaboration)
autor
Han C.
  • Department of Physics, Chungbuk National University, Cheongju 28644, RepublicofKorea
  • (KMTNet Collaboration)
autor
Hwang K.-H.
  • Korea Astronomy and Space Science Institute, Daejon 34055, Korea
  • (KMTNet Collaboration)
autor
Jung Y. K.
  • Harvard-Smithsonian CfA, 60 Garden St., Cambridge, MA 02138, USA
  • (KMTNet Collaboration)
autor
Shin I.-G.
  • Harvard-Smithsonian CfA, 60 Garden St., Cambridge, MA 02138, USA
  • (KMTNet Collaboration)
autor
Shvartzvald Y.
  • Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109, USA
  • NASA Postdoctoral Program Fellow
  • (KMTNet Collaboration)
autor
Yee J. C.
  • Harvard-Smithsonian CfA, 60 Garden St., Cambridge, MA 02138, USA
  • (KMTNet Collaboration)
autor
Zang W.
  • Physics Department and Tsinghua Centre for Astrophysics, Tsinghua University, Beijing 100084, China
  • Department of Physics, Zhejiang University, Hangzhou, 310058, China
  • (KMTNet Collaboration)
autor
Zhu W.
  • Canadian Institute for Theoretical Astrophysics, University of Toronto,
  • (KMTNet Collaboration)
autor
Cha S.-M.
  • Korea Astronomy and Space Science Institute, Daejon 34055, Korea
  • School of Space Research, Kyung Hee University, Yongin, Kyeonggi 17104, Korea
  • (KMTNet Collaboration)
autor
Kim D.-J.
  • Korea Astronomy and Space Science Institute, Daejon 34055, Korea
  • (KMTNet Collaboration)
autor
Kim H.-W.
  • Korea Astronomy and Space Science Institute, Daejon 34055, Korea
  • (KMTNet Collaboration)
autor
Kim S.-L.
  • Korea Astronomy and Space Science Institute, Daejon 34055, Korea
  • (KKorea University of Science and Technology, Daejeon 34113, Korea
  • (KMTNet Collaboration)
autor
Lee C.-U.
  • Korea Astronomy and Space Science Institute, Daejon 34055, Korea
  • Korea University of Science and Technology, Daejeon 34113, Korea
  • (KMTNet Collaboration)
autor
Lee D.-J
  • Korea Astronomy and Space Science Institute, Daejon 34055, Korea
  • (KMTNet Collaboration)
autor
Lee Y.
  • Korea Astronomy and Space Science Institute, Daejon 34055, Korea
  • School of Space Research, Kyung Hee University, Yongin, Kyeonggi 17104, Korea
  • (KMTNet Collaboration)
autor
Park B.-G.
  • Korea Astronomy and Space Science Institute, Daejon 34055, Korea
  • Korea University of Science and Technology, Daejeon 34113, Korea
  • (KMTNet Collaboration)
autor
Pogge R. W.
  • Department of Astronomy, Ohio State University, 140 W. 18th Ave., Columbus, OH43210, USA
  • (KMTNet Collaboration)
autor
Bozza W.
  • Dipartimento di Fisica "E.R. Caianiello", Università di Salerno, Via Giovanni Paolo II 132, 84084, Fisciano, Italy
  • Istituto Nazionale di Fisica Nucleare, Sezione di Napoli, Napoli, Italy
  • (MiNDSTEp Collaboration)
autor
Dominik M.
  • Centre for Exoplanet Science, SUPA, School of Physics & Astronomy, University of St Andrews, North Haugh, St Andrews KY16 9SS, UK
  • (MiNDSTEp Collaboration)
autor
Helling C.
  • Centre for Exoplanet Science, SUPA, School of Physics & Astronomy, University of St Andrews, North Haugh, St Andrews KY16 9SS, UK
  • (MiNDSTEp Collaboration)
autor
Hundertmark M.
  • Astronomisches Rechen-Institut, Zentrum für Astronomie der Universität Heidelberg (ZAH), 69120 Heidelberg, Germany
  • (MiNDSTEp Collaboration)
autor
Jørgensen U. G.
  • Niels Bohr Institute & Centre for Star and Planet Formation, University of Copenhagen, Øster Voldgade 5, 1350 Copenhagen, Denmark
  • (MiNDSTEp Collaboration)
autor
Longa-Peña P.
  • Unidad de Astronomìa, Universidad de Antofagasta, Av. Angamos 601, Antofagasta, Chile
  • (MiNDSTEp Collaboration)
autor
Lowry S.
  • Centre for Astrophysics & Planetary Science, The University of Kent, Canterbury CT27NH,UK
  • (MiNDSTEp Collaboration)
autor
Burgdorf M.
  • Universität Hamburg, Faculty of Mathematics, Informatics and Natural Sciences, Department of Earth Sciences, Meteorological Institute, Bundesstraße 55, 20146 Hamburg, Germany
  • (MiNDSTEp Collaboration)
autor
Campbell-White J.
  • Centre for Astrophysics & Planetary Science, The University of Kent, Canterbury CT27NH,UK
  • (MiNDSTEp Collaboration)
autor
Ciceri S.
  • Department of Astronomy, Stockholm University, Alba Nova University Center, 106 91, Stockholm, Sweden
  • (MiNDSTEp Collaboration)
autor
Evans D.
  • Astrophysics Group, Keele University, Staffordshire, ST5 5BG, UK
  • (MiNDSTEp Collaboration)
autor
Jaimes R. F.
  • Centre for Exoplanet Science, SUPA, School of Physics & Astronomy, University of St Andrews, North Haugh, St Andrews KY16 9SS, UK
  • (MiNDSTEp Collaboration)
autor
Fujii Y. I.
  • Niels Bohr Institute & Centre for Star and Planet Formation, University of Copenhagen, Øster Voldgade 5, 1350 Copenhagen, Denmark
  • Institute for Advanced Research, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-8601, Japan
  • (MiNDSTEp Collaboration)
autor
Haikala L. K.
  • Instituto de Astronomia y Ciencias Planetarias de Atacama, Universidad de Atacama, Copayapu 485, Copiapo, Chile
  • (MiNDSTEp Collaboration)
autor
Henning T.
  • Max-Planck-Institute for Astronomy, Königstuhl 17, 69117 Heidelberg, Germany
  • (MiNDSTEp Collaboration)
autor
Hinse T. C.
  • Korea Astronomy and Space Science Institute, Daejon 34055, Korea
  • (MiNDSTEp Collaboration)
autor
Mancini L.
  • Max-Planck-Institute for Astronomy, Königstuhl 17, 69117 Heidelberg, Germany
  • Department of Physics, University of Rome Tor Vergata, Via della Ricerca Scientifica 1, I-00133-Roma, Italy
  • INAF - Astrophysical Observatory of Turin, Via Osservatorio 20, I-10025-Pino Torinese, Italy
  • (MiNDSTEp Collaboration)
autor
Peixinho N.
  • Unidad de Astronomìa, Universidad de Antofagasta, Av. Angamos 601, Antofagasta, Chile
  • CITEUC - Center for Earth and Space Research of the University of Coimbra, Geophysical and Astronomical Observatory, R. Observatorio s/n, 3040-004 Coimbra, Portugal
  • (MiNDSTEp Collaboration)
autor
Rahvar S.
  • Department of Physics, Sharif University of Technology, PO Box 11155-9161 Tehran, Iran
  • (MiNDSTEp Collaboration)
autor
Rabus M.
  • Instituto de Astrofisica, Pontificia Universidad Católica de Chile, Av. Vicuña Mackenna 4860, 7820436 Macul, Santiago, Chile
  • Korea University of Science and Technology, Daejeon 34113, Korea
  • (MiNDSTEp Collaboration)
autor
Skottfelt J.
  • Centre for Electronic Imaging, Department of Physical Sciences, The Open University, Milton Keynes, MK7 6AA, UK
  • (MiNDSTEp Collaboration)
autor
Snodgrass C.
  • School of Physical Sciences, Faculty of Science, Technology, Engineering and Mathematics, The Open University, Walton Hall, Milton Keynes, MK7 6AA, UK
  • (MiNDSTEp Collaboration)
autor
Southworth J.
  • Astrophysics Group, Keele University, Staffordshire, ST5 5BG, UK
  • (MiNDSTEp Collaboration)
autor
von Essen C.
  • Stellar Astrophysics Centre, Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, 8000 Aarhus C, Denmark
  • (MiNDSTEp Collaboration)
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Uwagi
Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-c46bc590-b8b9-42f1-81d4-bdad09a7c07c
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