An analysis of binary microlensing event OGLE-2015-BLG-0060-Reference-Cited by-同舟云学术

An analysis of binary microlensing event OGLE-2015-BLG-0060

Published:2019-05-30 Issue:4 Volume:487 Page:4603-4614
ISSN:0035-8711
Container-title:Monthly Notices of the Royal Astronomical Society
language:en
Short-container-title:

Author:

Tsapras Y¹^ORCID,Cassan A²,Ranc C³,Bachelet E⁴,Street R⁴,Udalski A⁵,Hundertmark M¹,Bozza V⁶⁷,Beaulieu J P²⁸,Marquette J B²,Euteneuer E¹,Bramich D M⁹,Dominik M¹⁰,Figuera Jaimes R¹⁰¹¹,Horne K¹⁰,Mao S¹¹¹²¹³,Menzies J¹⁴,Schmidt R¹,Snodgrass C¹⁵¹⁶,Steele I A¹⁷,Wambsganss J¹¹⁸,Mróz P⁵,Szymański M K⁵,Soszyński I⁵,Skowron J⁵,Pietrukowicz P⁵,Kozłowski S⁵,Poleski R¹⁹,Ulaczyk K⁵,Pawlak M⁵,Jørgensen U G²⁰,Skottfelt J²⁰²¹,Popovas A²⁰,Ciceri S²²,Korhonen H²⁰²³²⁴,Kuffmeier M²⁰,Evans D F²⁵,Peixinho N²⁶²⁷,Hinse T C²⁸,Burgdorf M J²⁹,Southworth J²⁵,Tronsgaard R³⁰,Kerins E¹³,Andersen M I²³,Rahvar S³¹,Wang Y³²,Wertz O³³,Rabus M²²³⁴,Calchi Novati S³⁵,D’Ago G⁶³⁶,Scarpetta G⁶³⁷,Mancini L²²³⁸³⁹,Abe F⁴⁰,Asakura Y⁴⁰,Bennett D P³⁴¹,Bhattacharya A³⁴¹,Donachie M⁴²,Evans P⁴²,Fukui A⁴³,Hirao Y⁴⁴,Itow Y⁴⁰,Kawasaki K⁴⁴,Koshimoto N⁴⁴,Li M C A⁴²,Ling C H⁴⁵,Masuda K⁴⁰,Matsubara Y⁴⁰,Muraki Y⁴⁰,Miyazaki S⁴⁴,Nagakane M⁴⁴,Ohnishi K⁴⁶,Rattenbury N⁴²,Saito To⁴⁷,Sharan A⁴²,Shibai H⁴⁴,Sullivan D J⁴⁸,Sumi T⁴⁴,Suzuki D³,Tristram P J⁴⁹,Yamada T⁵⁰,Yonehara A¹⁰, , , , ,Bramich D M,Dominik M,Jaimes R Figuera,Horne K,Mao S,Menzies J,Schmidt R,Snodgrass C,Steele I A,Wambsganss J,Mróz P,Szymański M K,Soszyński I,Skowron J,Pietrukowicz P,Kozłowski S,Poleski R,Ulaczyk K,Pawlak M,Jørgensen U G,Skottfelt J,Popovas A,Ciceri S,Korhonen H,Kuffmeier M,Evans D F,Peixinho N,Hinse T C,Burgdorf M J,Southworth J,Tronsgaard R,Kerins E,Andersen M I,Rahvar S,Wang Y,Wertz O,Rabus M,Novati S Calchi,D'Ago G,Scarpetta G,Mancini L,Abe F,Asakura Y,Bennett D P,Bhattacharya A,Donachie M,Evans P,Fukui A,Hirao Y,Itow Y,Kawasaki K,Koshimoto N,Li M C A,Ling C H,Masuda K,Matsubara Y,Muraki Y,Miyazaki S,Nagakane M,Ohnishi K,Rattenbury N,Saito T o,Sharan A,Shibai H,Sullivan D J,Sumi T,Suzuki D,Tristram P J,Yamada T,Yonehara A

Affiliation:

1. Zentrum für Astronomie der Universität Heidelberg, Astronomisches Rechen-Institut, Mönchhofstr 12-14, D-69120 Heidelberg, Germany

2. Institut d’Astrophysique de Paris, Sorbonne Université, CNRS, UMR 7095, 98 bis bd Arago, F-75014 Paris, France

3. Code 667, NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA

4. Las Cumbres Observatory Global Telescope Network, 6740 Cortona Drive, suite 102, Goleta, CA 93117, USA

5. Warsaw University Observatory, Al. Ujazdowskie 4, PL-00-478 Warszawa, Poland

6. Dipartimento di Fisica ‘E.R. Caianiello’, Università di Salerno, Via Giovanni Paolo II 132, I-84084 Fisciano, Italy

7. Istituto Nazionale di Fisica Nucleare, Sezione di Napoli, Via Cintia, I-80126 Napoli, Italy

8. School of Physical Sciences, University of Tasmania, Private Bag 37 Hobart, Tasmania 7001 Australia

9. New York University Abu Dhabi, PO Box 129188, Saadiyat Island, Abu Dhabi, UAE

10. SUPA, School of Physics & Astronomy, University of St Andrews, North Haugh, St Andrews KY16 9SS, UK

11. Physics Department and Tsinghua Centre for Astrophysics, Tsinghua University, Beijing 100084, China

12. National Astronomical Observatories, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing 100012, China

13. Jodrell Bank, School of Physics and Astronomy, The University of Manchester, Oxford Road, Manchester M13 9PL, UK

14. South African Astronomical Observatory, PO Box 9, Observatory 7935, South Africa

15. Planetary and Space Sciences, Department of Physical Sciences, The Open University, Milton Keynes MK7 6AA, UK

16. Institute for Astronomy, University of Edinburgh, Royal Observatory, Edinburgh EH9 3HJ, UK

17. Astrophysics Research Institute, Liverpool John Moores University, Liverpool CH41 1LD, UK

18. International Space Science Institute (ISSI), Hallerstrasse 6, CH-3012 Bern, Switzerland

19. Department of Astronomy, Ohio State University, 140 W. 18th Ave., Columbus, OH 43210, USA

20. Niels Bohr Institute & Centre for Star and Planet Formation, University of Copenhagen Ø ster Voldgade 5, DK-1350 Copenhagen, Denmark

21. Centre for Electronic Imaging, Department of Physical Sciences, The Open University, Milton Keynes MK7 6AA, UK

22. Max Planck Institute for Astronomy, Königstuhl 17, D-69117 Heidelberg, Germany

23. Dark Cosmology Centre, Niels Bohr Institute, University of Copenhagen, Juliane Maries Vej 30, DK-2100 Copenhagen Ø, Denmark

24. Finnish Centre for Astronomy with ESO (FINCA), Väisäläntie 20, FI-21500 Piikkiö, Finland

25. Astrophysics Group, Keele University, Staffordshire ST5 5BG, UK

26. Unidad de Astronomía, Fac. de Ciencias Básicas, Universidad de Antofagasta, Avda. U. de Antofagasta 02800, Antofagasta, Chile

27. CITEUC – Centre for Earth and Space Science Research of the University of Coimbra, Observatório Astronómico da Universidade de Coimbra, P-3030-004 Coimbra, Portugal

28. Korea Astronomy & Space Science Institute, 776 Daedukdae-ro, Yuseong-gu, 305-348 Daejeon, Republic of Korea

29. Universität Hamburg, Faculty of Mathematics, Informatics and Natural Sciences, Department of Earth Sciences, Meteorological Institute, Bundesstraße 55, D-20146 Hamburg, Germany

30. Stellar Astrophysics Centre, Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, DK-8000 Aarhus C, Denmark

31. Department of Physics, Sharif University of Technology, PO Box 11155-9161 Tehran, Iran

32. Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011, China

33. Institut d’Astrophysique et de Géophysique, Allée du 6 Août 17, Sart Tilman, Bât. B5c, B-4000 Liège, Belgium

34. Instituto de Astrofísica, Facultad de Física, Pontificia Universidad Católica de Chile, Av. Vicuña Mackenna 4860, 7820436 Macul, Santiago, Chile

35. IPAC, Mail Code 100-22, Caltech, 1200 E. California Blvd., Pasadena, CA 91125, USA

36. INAF – Osservatorio Astronomico di Capodimonte, Salita Moiariello 16, I-80131 Napoli, Italy

37. Istituto Internazionale per gli Alti Studi Scientifici (IIASS), Via G. Pellegrino 19, I-84019 Vietri sul Mare (SA), Italy

38. Department of Physics, University of Rome Tor Vergata, Via della Ricerca Scientifica 1, I-00133 Roma, Italy

39. INAF – Astrophysical Observatory of Turin, Via Osservatorio 20, I-10025 Pino Torinese, Italy

40. Institute for Space-Earth Environmental Research, Nagoya University, Nagoya 464-8601, Japan

41. Department of Astronomy, University of Maryland, College Park, MD 20742, USA

42. Department of Physics, University of Auckland, Private Bag 92019, Auckland, New Zealand

43. Okayama Observatory, National Astronomical Observatory of Japan, 3037-5 Honjo, Kamogata, Asakuchi, Okayama 719-0232, Japan

44. Department of Earth and Space Science, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan

45. Institute of Natural and Mathematical Sciences, Massey University, Auckland 0745, New Zealand

46. Nagano National College of Technology, Nagano 381-8550, Japan

47. Tokyo Metropolitan College of Aeronautics, Tokyo 116-8523, Japan

48. School of Chemical and Physical Sciences, Victoria University, PO Box 600, Wellington 6140, New Zealand

49. University of Canterbury Mt. John Observatory, PO Box 56, Lake Tekapo 8770, New Zealand

50. Department of Physics, Faculty of Science, Kyoto Sangyo University, 603-8555 Kyoto, Japan

Abstract

ABSTRACT We present the analysis of stellar binary microlensing event OGLE-2015-BLG-0060 based on observations obtained from 13 different telescopes. Intensive coverage of the anomalous parts of the light curve was achieved by automated follow-up observations from the robotic telescopes of the Las Cumbres Observatory. We show that, for the first time, all main features of an anomalous microlensing event are well covered by follow-up data, allowing us to estimate the physical parameters of the lens. The strong detection of second-order effects in the event light curve necessitates the inclusion of longer-baseline survey data in order to constrain the parallax vector. We find that the event was most likely caused by a stellar binary-lens with masses $M_{\star 1} = 0.87 \pm 0.12 \, \mathrm{M}_{\odot }$ and $M_{\star 2} = 0.77 \pm 0.11 \, \mathrm{M}_{\odot }$. The distance to the lensing system is 6.41 ± 0.14 kpc and the projected separation between the two components is 13.85 ± 0.16 au. Alternative interpretations are also considered.

Funder

National Science Foundation of China

STFC

National Science Centre, Poland

NASA

JSPS

Publisher

Oxford University Press (OUP)

Subject

Space and Planetary Science,Astronomy and Astrophysics

Link

http://academic.oup.com/mnras/advance-article-pdf/doi/10.1093/mnras/stz1404/28746858/stz1404.pdf