↓ Direkt till sidans innehåll
↓ Direkt till sidans sekundära innehåll (sidomenyn)

Träfflista för sökning "onr:"swepub:oai:DiVA.org:su-157696" "

Search: onr:"swepub:oai:DiVA.org:su-157696"

Result 1-1 of 1

Sort/group result

Sort by: Hits per page:

Enumeration	Reference	Cover	Find
1.	Han, C., et al. (author) OGLE-2017-BLG-0329L : A Microlensing Binary Characterized with Dramatically Enhanced Precision Using Data from Space-based Observations 2018 In: Astrophysical Journal. - : American Astronomical Society. - 0004-637X .- 1538-4357. ; 859:2 Journal article (peer-reviewed)abstract Mass measurements of gravitational microlenses require one to determine the microlens parallax pE, but precise pE measurement, in many cases, is hampered due to the subtlety of the microlens-parallax signal combined with the difficulty of distinguishing the signal from those induced by other higher-order effects. In this work, we present the analysis of the binary-lens event OGLE-2017-BLG-0329, for which pi(E) is measured with a dramatically improved precision using additional data from space-based Spitzer observations. We find that while the parallax model based on the ground-based data cannot be distinguished from a zero-pi(E) model at the 2 sigma level, the addition of the Spitzer data enables us to identify two classes of solutions, each composed of a pair of solutions according to the well-known ecliptic degeneracy. It is found that the space-based data reduce the measurement uncertainties of the north and east components of the microlens-parallax vector pE by factors similar to 18 and similar to 4, respectively. With the measured microlens parallax combined with the angular Einstein radius measured from the resolved caustic crossings, we find that the lens is composed of a binary with component masses of either (M-1, M-2) similar to (1.1, 0.8) M-circle dot or similar to(0.4, 0.3) M-circle dot according to the two solution classes. The first solution is significantly favored but the second cannot be securely ruled out based on the microlensing data alone. However, the degeneracy can be resolved from adaptive optics observations taken similar to 10 years after the event.

Skapa referenser, mejla, bekava och länka

Permalink

Result 1-1 of 1

Refine your search

Type of publication: journal article (1)

Type of content: peer-reviewed (1)

Author/Editor: Kim, H. W. (1); Kim, D. J. (1); Han, C. (1); Udalski, A. (1); Ulaczyk, K. (1); Beichman, C. (1); show more...; Rybicki, K (1); Lowry, S. (1); Ciceri, Simona (1); Mróz, P. (1); Lee, Y (1); Gould, A (1); Zhu, W (1); Pawlak, M. (1); Helling, C. (1); Yee, J. C. (1); Szymański, M. K. (1); Soszyński, I. (1); Poleski, R. (1); Kozłowski, S. (1); Pietrukowicz, P. (1); Skowron, J. (1); Rabus, M. (1); Kim, S. L. (1); Snodgrass, C. (1); Chung, S. J. (1); Pogge, R. W. (1); Jorgensen, U.G. (1); Henderson, C. B. (1); Bryden, G. (1); Haikala, L. K. (1); Gaudi, B. S. (1); Lee, C-U (1); Bozza, V. (1); Burgdorf, M. J. (1); Novati, S. Calchi (1); Dominik, M. (1); Hinse, T. C. (1); Hundertmark, M. (1); Rahvar, S. (1); Albrow, M. D. (1); Zang, W (1); Iwanek, P. (1); Hwang, K. -H. (1); Jung, Y. K. (1); Ryu, Y. -H. (1); Shin, I. -G. (1); Shvartzvald, Y. (1); Cha, S. -M. (1); Lee, D. -J. (1); show less...

University: Stockholm University (1)

Language: English (1)

Research subject (UKÄ/SCB): Natural sciences (1)

Year: 2018 (1)

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.

Copyright © LIBRIS - National Library Systems
LIBRIS.kb.se

pil uppåt

Close

Copy and save the link in order to return to this view