Radosław Poleski
The Spitzer Microlensing Program As A Probe For Globular Cluster Planets: Analysis Of Ogle-2015-BLG-0448
Poleski, Radosław; Zhu, Wei; Christie, Grant W.; Udalski, Andrzej; Gould, Andrew; Bachelet, Etienne; Skottfelt, Jesper; Calchi Novati, Sebastiano; Szymański, M.K.; Soszyński, I.; Pietrzyński, G.; Wyrzykowski, Ł.; Ulaczyk, K.; Pietrukowicz, P.; Kozłowski, Szymon; Skowron, J.; Mróz, P.; Pawlak, M.; Beichman, C.; Bryden, G.; Carey, S.; Fausnaugh, M.; Gaudi, B.S.; Henderson, C.B.; Pogge, R.W.; Shvartzvald, Y.; Wibking, B.; Yee, J.C.; Beatty, T.G.; Eastman, J.D.; Drummond, J.; Friedmann, M.; Henderson, M.; Johnson, J.A.; Kaspi, S.; Maoz, D.; McCormick, J.; McCrady, N.; Natusch, T.; Ngan, H.; Porritt, I.; Relles, H.M.; Sliski, D.H.; Tan, T.-G.; Wittenmyer, R.A.; Wright, J.T.; Street, R.A.; Tsapras, Y.; Bramich, D.M.; Horne, K.; Snodgrass, C.; Steele, I.A.; Menzies, J.; Figuera Jaimes, R.; Wambsganss, J.; Schmidt, R.; Cassan, A.; Ranc, C.; Mao, S.; Bozza, V.; Dominik, M.; Hundertmark, M.P.G.; Jørgensen, U.G.; Andersen, M.I.; Burgdorf, M.J.; Ciceri, S.; D'Ago, G.; Evans, D.F.; Gu, S.-H.; Hinse...
Authors
Wei Zhu
Grant W. Christie
Andrzej Udalski
Andrew Gould
Etienne Bachelet
Jesper Skottfelt
Sebastiano Calchi Novati
M.K. Szymański
I. Soszyński
G. Pietrzyński
Ł. Wyrzykowski
K. Ulaczyk
P. Pietrukowicz
Szymon Kozłowski
J. Skowron
P. Mróz
M. Pawlak
C. Beichman
G. Bryden
S. Carey
M. Fausnaugh
B.S. Gaudi
C.B. Henderson
R.W. Pogge
Y. Shvartzvald
B. Wibking
J.C. Yee
T.G. Beatty
J.D. Eastman
J. Drummond
M. Friedmann
M. Henderson
J.A. Johnson
S. Kaspi
D. Maoz
J. McCormick
N. McCrady
T. Natusch
H. Ngan
I. Porritt
H.M. Relles
D.H. Sliski
T.-G. Tan
R.A. Wittenmyer
J.T. Wright
R.A. Street
Y. Tsapras
D.M. Bramich
K. Horne
C. Snodgrass
I.A. Steele
J. Menzies
R. Figuera Jaimes
J. Wambsganss
R. Schmidt
A. Cassan
C. Ranc
S. Mao
V. Bozza
M. Dominik
M.P.G. Hundertmark
U.G. Jørgensen
M.I. Andersen
M.J. Burgdorf
S. Ciceri
G. D'Ago
D.F. Evans
S.-H. Gu
T.C. Hinse
N. Kains
E. Kerins
H. Korhonen
M. Kuffmeier
L. Mancini
A. Popovas
M. Rabus
S. Rahvar
R.T. Rasmussen
G. Scarpetta
Dr John Taylor j.k.taylor@keele.ac.uk
J. Surdej
E. Unda-Sanzana
P. Verma
C. von Essen
Y.-B. Wang
O. Wertz
Abstract
The microlensing event OGLE-2015-BLG-0448 was observed by Spitzer and lay within the tidal radius of the globular cluster NGC 6558. The event had moderate magnification and was intensively observed, hence it had the potential to probe the distribution of planets in globular clusters. We measure the proper motion of NGC 6558 (${{\boldsymbol{\mu }}}_{\mathrm{cl}}(N,E)=(+0.36\pm 0.10,+1.42\pm 0.10)\;{\rm{mas}}\;{{\rm{yr}}}^{-1}$) as well as the source and show that the lens is not a cluster member. Even though this particular event does not probe the distribution of planets in globular clusters, other potential cluster lens events can be verified using our methodology. Additionally, we find that microlens parallax measured using Optical Gravitational Lens Experiment (OGLE) photometry is consistent with the value found based on the light curve displacement between the Earth and Spitzer.
Journal Article Type | Article |
---|---|
Acceptance Date | Mar 20, 2016 |
Online Publication Date | May 23, 2016 |
Journal | Astrophysical Journal |
Print ISSN | 0004-637X |
Publisher | American Astronomical Society |
Peer Reviewed | Peer Reviewed |
Volume | 823 |
Issue | 1 |
Article Number | 63 |
DOI | https://doi.org/10.3847/0004-637X/823/1/63 |
Keywords | globular clusters, individual (NGC6558), gravitational lensing, micro, planets and satellites, detection, proper motions |
Publisher URL | http://dx.doi.org/10.3847/0004-637X/823/1/63 |
Files
2016ApJ...823...63P.pdf
(1.2 Mb)
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Publisher Licence URL
https://creativecommons.org/licenses/by-nc/4.0/
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