Results
author = "Yee, J C"
WFIRST Planet Masses from Microlens Parallax
Author(s) :
Yee, J. C.
Description :
I present a method using only a few ground-based observations of a magnified
microlensing event to routinely measure the parallaxes of WFIRST events if
WFIRST is in an L2 orbit. This could be achieved with target-of-opportunity
observations of select WFIRST events, but is better done with a comple...
Repository :
arXiv
Language(s) :
Undetermined
MOA-2011-BLG-293Lb: A test of pure survey microlensing planet detections
Author(s) :
Yee, J. C.
,
Shvartzvald, Y.
,
Gal-Yam, A.
,
Bond, I. A.
,
Udalski, A.
,
Kozlowski, S.
,
Han, C.
,
Gould, A.
,
Skowron, J.
,
Suzuki, D.
Description :
Because of the development of large-format, wide-field cameras, microlensing
surveys are now able to monitor millions of stars with sufficient cadence to
detect planets. These new discoveries will span the full range of significance
levels including planetary signals too small to be distinguished ...
Repository :
arXiv
Language(s) :
Undetermined
Extreme Magnification Microlensing Event OGLE-2008-BLG-279: Strong Limits on Planetary Companions to the Lens Star
Author(s) :
Yee, J. C.
,
Udalski, A.
,
Sumi, T.
,
Dong, Subo
,
Kozłowski, S.
,
Bird, J. C.
,
Cole, A.
,
Higgins, D.
,
McCormick, J.
,
Monard, B.
Description :
We analyze the extreme high-magnification microlensing event
OGLE-2008-BLG-279, which peaked at a maximum magnification of A ~ 1600 on 30
May 2008. The peak of this event exhibits both finite-source effects and
terrestrial parallax, from which we determine the mass of the lens, M_l=0.64
+/- 0.10 M...
Repository :
arXiv
Language(s) :
Undetermined
OGLE-2008-BLG-513Lb: The Orbital Solution for a Microlensing Planet
Author(s) :
Yee, J. C.
,
Udalski, A.
,
Dong, Subo
,
Greenhill, J.
,
Tsapras, Y.
,
Bond, I. A.
,
Gould, A.
,
Kozlowski, S.
,
Fouque, P.
,
Albrow, M. D.
Description :
A static binary star solution for OGLE-2008-BLG-513 has been found. The mass
ratio and separation for this solution are q~0.28, s~0.86. This model has a
chi^2 comparable to the chi^2 of the model with a planetary mass ratio and
orbital motion that was presented in this paper. Because the model wit...
Repository :
arXiv
Language(s) :
Undetermined
Chemical evolution of the Galactic bulge as traced by microlensed dwarf and subgiant stars. V. Evidence for a wide age distribution and a complex MDF
Author(s) :
Bensby, T.
,
Yee, J. C.
,
Feltzing, S.
,
Johnson, J. A.
,
Gould, A.
,
Cohen, J. G.
,
Asplund, M.
,
Meléndez, J.
,
Lucatello, S.
Description :
Based on high-resolution spectra obtained during gravitational microlensing
events we present a detailed elemental abundance analysis of 32 dwarf and
subgiant stars in the Galactic bulge. [ABRIDGED], we now have 58 microlensed
bulge dwarfs and subgiants that have been homogeneously analysed. The m...
Repository :
arXiv
Language(s) :
Undetermined
The Mass of the Black Hole in the Quasar PG 2130+099
Author(s) :
Grier, C. J.
,
Peterson, B. M.
,
Bentz, M. C.
,
Denney, K. D.
,
Eastman, J. D.
,
Dietrich, M.
,
Pogge, R. W.
,
Prieto, J. L.
Description :
We present the results of a recent reverberation-mapping campaign undertaken
to improve measurements of the radius of the broad line region and the central
black hole mass of the quasar PG 2130+099. Cross correlation of the 5100
angstrom continuum and H-beta emission-line light curves yields a tim...
Repository :
arXiv
Language(s) :
Undetermined
Chemical evolution of the Galactic bulge as traced by microlensed dwarf and subgiant stars. IV. Two bulge populations
Author(s) :
Bensby, T.
,
Adén, D.
,
Meléndez, J.
,
Gould, A.
,
Feltzing, S.
,
Asplund, M.
,
Johnson, J. A.
,
Lucatello, S.
,
Yee, J. C.
,
Ramírez, I.
Description :
[ABRIDGED] Based on high-resolution (R~42000 to 48000) and high
signal-to-noise (S/N~50 to 150) spectra obtained with UVES/VLT, we present
detailed elemental abundances (O, Na, Mg, Al, Si, Ca, Ti, Cr, Fe, Ni, Zn, Y,
and Ba) and stellar ages for 26 microlensed dwarf and subgiant stars in the
Galact...
Repository :
arXiv
Language(s) :
Undetermined
Variability and stability in blazar jets on time scales of years: Optical polarization monitoring of OJ287 in 2005-2009
Author(s) :
Villforth, C.
,
Nilsson, K.
,
Heidt, J.
,
Takalo, L. O.
,
Pursimo, T.
,
Berdyugin, A.
,
Lindfors, E.
,
Pasanen, M.
,
Winiarski, M.
Description :
(Abridged) OJ287 is a BL Lac object that has shown double-peaked bursts at
regular intervals of ~12 yr during the last ~40 yr. We analyse optical
photopolarimetric monitoring data from 2005-2009, during which the latest
double-peaked outburst occurred. The aim of this study is twofold: firstly, we...
Repository :
arXiv
Language(s) :
Undetermined
The second multiple-planet system discovered by microlensing: OGLE-2012-BLG-0026Lb, c, a pair of jovian planets beyond the snow line
Author(s) :
Han, C.
,
Udalski, A.
,
Choi, J. -Y.
,
Yee, J. C.
,
Gould, A.
,
Christie, G.
,
Tan, T. -G.
,
Szymański, M. K.
,
Kubiak, M.
,
Soszyński, I.
Description :
We report the discovery of a planetary system from observation of the
high-magnification microlensing event OGLE-2012-BLG-0026. The lensing light
curve exhibits a complex central perturbation with multiple features. We find
that the perturbation was produced by two planets located near the Einstei...
Repository :
arXiv
Language(s) :
Undetermined
OGLE 2008-BLG-290: an accurate measurement of the limb darkening of a galactic bulge K Giant spatially resolved by microlensing
Author(s) :
Fouqué, P.
,
Heyrovský, D.
,
Dong, S.
,
Gould, A.
,
Udalski, A.
,
Albrow, M. D.
,
Batista, V.
,
Beaulieu, J*-P
,
Bennett, D. P.
Description :
Context. Not only is gravitational microlensing a successful tool for discovering distant exoplanets, but it also enables characterization of the lens and source stars involved in the lensing event.
Aims: In high-magnification events, the lens caustic may cross over the source disk, which all...
Aims: In high-magnification events, the lens caustic may cross over the source disk, which all...
Repository :
ORBi (University of Liège)
Language(s) :
English