Wei Zhu
Mass Measurements Of Isolated Objects From Space-Based Microlensing
Zhu, Wei; Calchi Novati, S.; Gould, A.; Udalski, A.; Han, C.; Shvartzvald, Y.; Ranc, C.; Jørgensen, U.G.; Poleski1, R.; Bozza, V.; Beichman, C.; Bryden, G.; Carey, S.; Gaudi, B.S.; Henderson, C.B.; Pogge, R.W.; Porritt, I.; Wibking, B.; Yee, J.C.; TEAM, SPITZER; Pawlak, M.; Szymański, M.K.; Skowron, J.; Mróz, P.; Kozłowski, S.; Ł. Wyrzykowski; Pietrukowicz, P.; Pietrzyński, G.; Soszyński, I.; Ulaczyk, K.; GROUP, OGLE; Choi, J.-Y.; Park, H.; Jung, Y.K.; Shin, I.-G.; Albrow, M.D.; Park, B.-G.; Kim, S.-L.; Lee, C.-U.; Cha, S.-M.; Kim, D.-J.; Lee, Y.; GROUP, KMTNET; Friedmann, M.; Kaspi, S.; Maoz, D.; GROUP, WISE; Hundertmark, M.; Street, R.A.; Tsapras, Y.; Bramich, D.M.; Cassan, A.; Dominik, M.; Bachelet, E.; Dong, Subo; Figuera Jaimes, R.; Horne, K.; Mao, S.; Menzies, J.; Schmidt, R.; Snodgrass, C.; Steele, I.A.; Wambsganss, J.; TEAM, ROBONET; Skottfelt, J.; Andersen, M.I.; Burgdorf, M.J.; Ciceri, S.; D'Ago, G.; Evans, D.F.; Gu, S.-H. ; Hinse, T.C.; Kerins, E.; Korhonen, H.; Kuffmeier, M...
Authors
S. Calchi Novati
A. Gould
A. Udalski
C. Han
Y. Shvartzvald
C. Ranc
U.G. Jørgensen
R. Poleski1
V. Bozza
C. Beichman
G. Bryden
S. Carey
B.S. Gaudi
C.B. Henderson
R.W. Pogge
I. Porritt
B. Wibking
J.C. Yee
SPITZER TEAM
M. Pawlak
M.K. Szymański
J. Skowron
P. Mróz
S. Kozłowski
Ł. Wyrzykowski
P. Pietrukowicz
G. Pietrzyński
I. Soszyński
K. Ulaczyk
OGLE GROUP
J.-Y. Choi
H. Park
Y.K. Jung
I.-G. Shin
M.D. Albrow
B.-G. Park
S.-L. Kim
C.-U. Lee
S.-M. Cha
D.-J. Kim
Y. Lee
KMTNET GROUP
M. Friedmann
S. Kaspi
D. Maoz
WISE GROUP
M. Hundertmark
R.A. Street
Y. Tsapras
D.M. Bramich
A. Cassan
M. Dominik
E. Bachelet
Subo Dong
R. Figuera Jaimes
K. Horne
S. Mao
J. Menzies
R. Schmidt
C. Snodgrass
I.A. Steele
J. Wambsganss
ROBONET TEAM
J. Skottfelt
M.I. Andersen
M.J. Burgdorf
S. Ciceri
G. D'Ago
D.F. Evans
S.-H. Gu
T.C. Hinse
E. Kerins
H. Korhonen
M. Kuffmeier
L. Mancini
N. Peixinho
A. Popovas
M. Rabus
S. Rahvar
R. Tronsgaard
G. Scarpetta
Dr John Taylor j.k.taylor@keele.ac.uk
J. Surdej
C. von Essen
Y.-B. Wang
O. Wertz
MINDSTEP GROUP
Abstract
We report on the mass and distance measurements of two single-lens events from the 2015 Spitzer microlensing campaign. With both finite-source effect and microlens parallax measurements, we find that the lens of OGLE-2015-BLG-1268 is very likely a brown dwarf (BD). Assuming that the source star lies behind the same amount of dust as the Bulge red clump, we find the lens is a 45 ± 7 ${M}_{{\rm{J}}}$ BD at 5.9 ± 1.0 kpc. The lens of of the second event, OGLE-2015-BLG-0763, is a 0.50 ± 0.04 ${M}_{\odot }$ star at 6.9 ± 1.0 kpc. We show that the probability to definitively measure the mass of isolated microlenses is dramatically increased once simultaneous ground- and space-based observations are conducted.
Journal Article Type | Article |
---|---|
Acceptance Date | Apr 21, 2016 |
Publication Date | Jun 27, 2016 |
Publicly Available Date | Mar 28, 2024 |
Journal | Astrophysical Journal |
Print ISSN | 0004-637X |
Publisher | American Astronomical Society |
Peer Reviewed | Peer Reviewed |
Volume | 825 |
Issue | 1 |
Article Number | 60 |
DOI | https://doi.org/10.3847/0004-637X/825/1/60 |
Keywords | brown dwarfs, gravitational lensing, micro, stars, fundamental parameters |
Publisher URL | http://dx.doi.org/10.3847/0004-637X/825/1/60 |
Files
2016ApJ...825...60Z.pdf
(1.3 Mb)
PDF
Publisher Licence URL
https://creativecommons.org/licenses/by-nc/4.0/
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