dc.contributor.author |
Hirao, Y |
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dc.contributor.author |
Bennett, DP |
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dc.contributor.author |
Ryu, Y-H |
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Koshimoto, N |
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dc.contributor.author |
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Essen, CV |
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dc.contributor.author |
Fujii, YI |
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Campbell-White, J |
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Lowry, S |
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Helling, C |
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Haikala, L |
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dc.contributor.author |
Kandori, R |
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dc.date.accessioned |
2020-07-03T04:49:20Z |
en |
dc.date.issued |
2020-06-06 |
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dc.identifier.citation |
Arxiv (2004.09067v2). 06 Jun 2020. 40 pages |
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dc.identifier.uri |
http://hdl.handle.net/2292/51818 |
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dc.description.abstract |
We report the discovery and analysis of the planetary microlensing event OGLE-2017-BLG-0406, which was observed both from the ground and by the ${\it Spitzer}$ satellite in a solar orbit. At high magnification, the anomaly in the light curve was densely observed by ground-based-survey and follow-up groups, and it was found to be explained by a planetary lens with a planet/host mass ratio of $q=7.0 \times 10^{-4}$ from the light-curve modeling. The ground-only and ${\it Spitzer}$-"only" data each provide very strong one-dimensional (1-D) constraints on the 2-D microlens parallax vector $\bf{\pi_{\rm E}}$. When combined, these yield a precise measurement of $\bf{\pi_{\rm E}}$, and so of the masses of the host $M_{\rm host}=0.56\pm0.07\,M_\odot$ and planet $M_{\rm planet} = 0.41 \pm 0.05\,M_{\rm Jup}$. The system lies at a distance $D_{\rm L}=5.2 \pm 0.5 \ {\rm kpc}$ from the Sun toward the Galactic bulge, and the host is more likely to be a disk population star according to the kinematics of the lens. The projected separation of the planet from the host is $a_{\perp} = 3.5 \pm 0.3 \ {\rm au}$, i.e., just over twice the snow line. The Galactic-disk kinematics are established in part from a precise measurement of the source proper motion based on OGLE-IV data. By contrast, the ${\it Gaia}$ proper-motion measurement of the source suffers from a catastrophic $10\,\sigma$ error. |
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dc.relation.ispartof |
Arxiv |
en |
dc.rights |
Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. Previously published items are made available in accordance with the copyright policy of the publisher. |
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dc.rights.uri |
https://researchspace.auckland.ac.nz/docs/uoa-docs/rights.htm |
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dc.rights.uri |
https://arxiv.org/licenses/nonexclusive-distrib/1.0/license.html |
en |
dc.subject |
astro-ph.EP |
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dc.subject |
astro-ph.EP |
en |
dc.subject |
astro-ph.GA |
en |
dc.subject |
astro-ph.SR |
en |
dc.title |
OGLE-2017-BLG-0406: ${\it Spitzer}$ Microlens Parallax Reveals Saturn-mass Planet orbiting M-dwarf Host in the Inner Galactic Disk |
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dc.type |
Report |
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dc.rights.holder |
Copyright: The authors |
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pubs.author-url |
http://arxiv.org/abs/2004.09067v2 |
en |
dc.rights.accessrights |
http://purl.org/eprint/accessRights/OpenAccess |
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pubs.subtype |
Working Paper |
en |
pubs.elements-id |
800596 |
en |
pubs.org-id |
Science |
en |
pubs.org-id |
Physics |
en |
pubs.arxiv-id |
2004.09067 |
en |
pubs.number |
2004.09067v2 |
en |
pubs.record-created-at-source-date |
2020-07-03 |
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