St Andrews Research Repository

St Andrews University Home
View Item 
  •   St Andrews Research Repository
  • University of St Andrews Research
  • University of St Andrews Research
  • University of St Andrews Research
  • View Item
  •   St Andrews Research Repository
  • University of St Andrews Research
  • University of St Andrews Research
  • University of St Andrews Research
  • View Item
  •   St Andrews Research Repository
  • University of St Andrews Research
  • University of St Andrews Research
  • University of St Andrews Research
  • View Item
  • Login
JavaScript is disabled for your browser. Some features of this site may not work without it.

MOA-2011-BLG-028Lb : a Neptune-mass microlensing planet in the Galactic bulge

Thumbnail
View/Open
Dominik_2016_Neptune_massMicrolensingPlanet_AJ_FinalPubVersion.pdf (924.7Kb)
Date
10/03/2016
Author
Skowron, J.
Udalski, A.
Poleski, R.
Kozłowski, S.
Szymański, M. K.
Wyrzykowski, Ł.
Ulaczyk, K.
Pietrukowicz, P.
Pietrzyński, G.
Soszyński, I.
Abe, F.
Bennett, D. P.
Bhattacharya, A.
Bond, I. A.
Freeman, M.
Fukui, A.
Hirao, Y.
Itow, Y.
Koshimoto, N.
Ling, C. H.
Masuda, K.
Matsubara, Y.
Muraki, Y.
Nagakane, M.
Ohnishi, K.
Rattenbury, N.
Saito, To
Sullivan, D. J.
Sumi, T.
Suzuki, D.
Tristram, P. J.
Yonehara, A.
Dominik, Martin
Jørgensen, U. G.
Bozza, V.
Harpsøe, K.
Hundertmark, M.
Skottfelt, J.
Keywords
Gravitational lensing: micro
Planetary systems
QB Astronomy
QC Physics
Space and Planetary Science
Astronomy and Astrophysics
NDAS
Metadata
Show full item record
Altmetrics Handle Statistics
Altmetrics DOI Statistics
Abstract
We present the discovery of a Neptune-mass planet orbiting a star 0.8 ± 0.3M in the Galactic bulge. The planet manifested itself during the microlensing event MOA-2011-BLG-028/OGLE-2011-BLG-0203 as a low-mass companion to the lens star. The analysis of the light curve provides the measurement of the mass ratio (1.2 ± 0.2) × 10-4 , which indicates that the mass of the planet is 12–60 Earth masses. The lensing system is located at 7.3 ± 0.7 kpc away from the Earth near the direction of Baade's Window. The projected separation of the planet at the time of the microlensing event was 3.1–5.2 au. Although the microlens parallax effect is not detected in the light curve of this event, preventing the actual mass measurement, the uncertainties of mass and distance estimation are narrowed by the measurement of the source star proper motion on the OGLE-III images spanning eight years, and by the low amount of blended light seen, proving that the host star cannot be too bright and massive. We also discuss the inclusion of undetected parallax and orbital motion effects into the models and their influence onto the final physical parameters estimates.preventing the actual mass measurement, the uncertainties of mass and distance estimation are narrowed by the measurement of the source star proper motion on the OGLE-III images spanning eight years, and by the low amount of blended light seen, proving that the host star cannot be too bright and massive. We also discuss the inclusion of undetected parallax and orbital motion effects into the models and their influence onto the final physical parameters estimates.
Citation
Skowron , J , Udalski , A , Poleski , R , Kozłowski , S , Szymański , M K , Wyrzykowski , Ł , Ulaczyk , K , Pietrukowicz , P , Pietrzyński , G , Soszyński , I , Abe , F , Bennett , D P , Bhattacharya , A , Bond , I A , Freeman , M , Fukui , A , Hirao , Y , Itow , Y , Koshimoto , N , Ling , C H , Masuda , K , Matsubara , Y , Muraki , Y , Nagakane , M , Ohnishi , K , Rattenbury , N , Saito , T , Sullivan , D J , Sumi , T , Suzuki , D , Tristram , P J , Yonehara , A , Dominik , M , Jørgensen , U G , Bozza , V , Harpsøe , K , Hundertmark , M & Skottfelt , J 2016 , ' MOA-2011-BLG-028Lb : a Neptune-mass microlensing planet in the Galactic bulge ' , Astrophysical Journal , vol. 820 , no. 1 , 4 . https://doi.org/10.3847/0004-637X/820/1/4
Publication
Astrophysical Journal
Status
Peer reviewed
DOI
https://doi.org/10.3847/0004-637X/820/1/4
ISSN
0004-637X
Type
Journal article
Rights
© 2016. The American Astronomical Society. All rights reserved. This work is made available online in accordance with the publisher’s policies. This is the final published version of the work, which was originally published at: https://dx.doi.org/10.3847/0004-637X/820/1/4
Description
The OGLE project has received funding from the National Science Centre, Poland, grant MAESTRO 2014/14/A/ST9/00121 to A.U.. J.S. was partially supported by the Space Exploration Research Fund of The Ohio State University. This research was partly supported by the Polish Ministry of Science and Higher Education (MNiSW) through the program "Iuventus Plus" award No. IP2011 026771. We thank Prof. M. Kubiak for contributing observations to this work as the OGLE Project member. T.S. acknowledges the financial support from the JSPS, JSPS23103002, JSPS24253004, and JSPS26247023. The MOA project is supported by the grants JSPS25103508 and 23340064.
Collections
  • University of St Andrews Research
URI
http://hdl.handle.net/10023/8665

Items in the St Andrews Research Repository are protected by copyright, with all rights reserved, unless otherwise indicated.

Advanced Search

Browse

All of RepositoryCommunities & CollectionsBy Issue DateNamesTitlesSubjectsClassificationTypeFunderThis CollectionBy Issue DateNamesTitlesSubjectsClassificationTypeFunder

My Account

Login

Open Access

To find out how you can benefit from open access to research, see our library web pages and Open Access blog. For open access help contact: openaccess@st-andrews.ac.uk.

Accessibility

Read our Accessibility statement.

How to submit research papers

The full text of research papers can be submitted to the repository via Pure, the University's research information system. For help see our guide: How to deposit in Pure.

Electronic thesis deposit

Help with deposit.

Repository help

For repository help contact: Digital-Repository@st-andrews.ac.uk.

Give Feedback

Cookie policy

This site may use cookies. Please see Terms and Conditions.

Usage statistics

COUNTER-compliant statistics on downloads from the repository are available from the IRUS-UK Service. Contact us for information.

© University of St Andrews Library

University of St Andrews is a charity registered in Scotland, No SC013532.

  • Facebook
  • Twitter