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Title: OGLE-2016-BLG-0168 Binary Microlensing Event: Prediction and Confirmation of the Microlens Parallax Effect from Space-based Observations

Abstract

The microlens parallax is a crucial observable for conclusively identifying the nature of lens systems in microlensing events containing or composed of faint (even dark) astronomical objects such as planets, neutron stars, brown dwarfs, and black holes. With the commencement of a new era of microlensing in collaboration with space-based observations, the microlens parallax can be routinely measured. In addition, space-based observations can provide opportunities to verify the microlens parallax measured from ground-only observations and to find a unique solution to the lensing light-curve analysis. Furthermore, since most space-based observations cannot cover the full light curves of lensing events, it is also necessary to verify the reliability of the information extracted from fragmentary space-based light curves. We conduct a test based on the microlensing event OGLE-2016-BLG-0168, created by a binary lens system consisting of almost equal mass M-dwarf stars, to demonstrate that it is possible to verify the microlens parallax and to resolve degeneracies using the space-based light curve even though the observations are fragmentary. Since space-based observatories will frequently produce fragmentary light curves due to their short observing windows, the methodology of this test will be useful for next-generation microlensing experiments that combine space-based and ground-based collaboration.

Authors:
; ;  [1]; ; ; ; ; ; ; ; ; ;  [2];  [3];  [4];  [5];  [6]; ; ;  [7] more »; ; ; ; « less
  1. Smithsonian Astrophysical Observatory, 60 Garden Street, Cambridge, MA 02138 (United States)
  2. Warsaw University Observatory, Al. Ujazdowskie 4,00-478 Warszawa (Poland)
  3. IPAC, Mail Code 100-22, California Institute of Technology, 1200 E. California Boulevard, Pasadena, CA 91125 (United States)
  4. Department of Physics, Chungbuk National University, Cheongju 371-763 (Korea, Republic of)
  5. University of Canterbury, Department of Physics and Astronomy, Private Bag 4800, Christchurch 8020 (New Zealand)
  6. Department of Astronomy, Ohio State University, 140 W. 18th Avenue, Columbus, OH 43210 (United States)
  7. Korea Astronomy and Space Science Institute, 776 Daedeokdae-ro, Yuseong-Gu, Daejeon 34055 (Korea, Republic of)
Publication Date:
OSTI Identifier:
22663133
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astronomical Journal (Online); Journal Volume: 154; Journal Issue: 5; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; BLACK HOLES; DIAGRAMS; DWARF STARS; GRAVITATIONAL LENSES; MASS; NEUTRON STARS; PLANETS; RELIABILITY; SPACE; VISIBLE RADIATION

Citation Formats

Shin, I.-G., Yee, J. C., Jung, Y. K., Udalski, A., Skowron, J., Mróz, P., Soszyński, I., Poleski, R., Szymański, M. K., Kozłowski, S., Pietrukowicz, P., Ulaczyk, K., Pawlak, M., Novati, S. Calchi, Han, C., Albrow, M. D., Gould, A., Chung, S.-J., Hwang, K.-H., Ryu, Y.-H., Collaboration: OGLE Collaboration, KMTNet Group, Spitzer Team, and and others. OGLE-2016-BLG-0168 Binary Microlensing Event: Prediction and Confirmation of the Microlens Parallax Effect from Space-based Observations. United States: N. p., 2017. Web. doi:10.3847/1538-3881/AA8A74.
Shin, I.-G., Yee, J. C., Jung, Y. K., Udalski, A., Skowron, J., Mróz, P., Soszyński, I., Poleski, R., Szymański, M. K., Kozłowski, S., Pietrukowicz, P., Ulaczyk, K., Pawlak, M., Novati, S. Calchi, Han, C., Albrow, M. D., Gould, A., Chung, S.-J., Hwang, K.-H., Ryu, Y.-H., Collaboration: OGLE Collaboration, KMTNet Group, Spitzer Team, & and others. OGLE-2016-BLG-0168 Binary Microlensing Event: Prediction and Confirmation of the Microlens Parallax Effect from Space-based Observations. United States. doi:10.3847/1538-3881/AA8A74.
Shin, I.-G., Yee, J. C., Jung, Y. K., Udalski, A., Skowron, J., Mróz, P., Soszyński, I., Poleski, R., Szymański, M. K., Kozłowski, S., Pietrukowicz, P., Ulaczyk, K., Pawlak, M., Novati, S. Calchi, Han, C., Albrow, M. D., Gould, A., Chung, S.-J., Hwang, K.-H., Ryu, Y.-H., Collaboration: OGLE Collaboration, KMTNet Group, Spitzer Team, and and others. Wed . "OGLE-2016-BLG-0168 Binary Microlensing Event: Prediction and Confirmation of the Microlens Parallax Effect from Space-based Observations". United States. doi:10.3847/1538-3881/AA8A74.
@article{osti_22663133,
title = {OGLE-2016-BLG-0168 Binary Microlensing Event: Prediction and Confirmation of the Microlens Parallax Effect from Space-based Observations},
author = {Shin, I.-G. and Yee, J. C. and Jung, Y. K. and Udalski, A. and Skowron, J. and Mróz, P. and Soszyński, I. and Poleski, R. and Szymański, M. K. and Kozłowski, S. and Pietrukowicz, P. and Ulaczyk, K. and Pawlak, M. and Novati, S. Calchi and Han, C. and Albrow, M. D. and Gould, A. and Chung, S.-J. and Hwang, K.-H. and Ryu, Y.-H. and Collaboration: OGLE Collaboration and KMTNet Group and Spitzer Team and and others},
abstractNote = {The microlens parallax is a crucial observable for conclusively identifying the nature of lens systems in microlensing events containing or composed of faint (even dark) astronomical objects such as planets, neutron stars, brown dwarfs, and black holes. With the commencement of a new era of microlensing in collaboration with space-based observations, the microlens parallax can be routinely measured. In addition, space-based observations can provide opportunities to verify the microlens parallax measured from ground-only observations and to find a unique solution to the lensing light-curve analysis. Furthermore, since most space-based observations cannot cover the full light curves of lensing events, it is also necessary to verify the reliability of the information extracted from fragmentary space-based light curves. We conduct a test based on the microlensing event OGLE-2016-BLG-0168, created by a binary lens system consisting of almost equal mass M-dwarf stars, to demonstrate that it is possible to verify the microlens parallax and to resolve degeneracies using the space-based light curve even though the observations are fragmentary. Since space-based observatories will frequently produce fragmentary light curves due to their short observing windows, the methodology of this test will be useful for next-generation microlensing experiments that combine space-based and ground-based collaboration.},
doi = {10.3847/1538-3881/AA8A74},
journal = {Astronomical Journal (Online)},
number = 5,
volume = 154,
place = {United States},
year = {Wed Nov 01 00:00:00 EDT 2017},
month = {Wed Nov 01 00:00:00 EDT 2017}
}